CN113236160A - Gas-lift reverse circulation secondary hole cleaning slurry circulation system for large-diameter ultra-deep pile - Google Patents
Gas-lift reverse circulation secondary hole cleaning slurry circulation system for large-diameter ultra-deep pileDownload PDFInfo
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- CN113236160A CN113236160ACN202110574215.4ACN202110574215ACN113236160ACN 113236160 ACN113236160 ACN 113236160ACN 202110574215 ACN202110574215 ACN 202110574215ACN 113236160 ACN113236160 ACN 113236160A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/14—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor using liquids and gases, e.g. foams
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Abstract
Description
Technical Field
The invention relates to the technical field of cast-in-place pile construction, in particular to a gas-lift reverse circulation secondary hole cleaning slurry circulation system for a large-diameter ultra-deep pile.
Background
Before pouring the concrete of the pile body, the cast-in-place pile needs to detect the thickness of sediment at the bottom of the hole according to requirements, and if the thickness of the sediment exceeds the design requirement, secondary hole cleaning needs to be carried out. The hole cleaning principle is that the circulating mud is utilized to make sediment at the bottom of a hole in a suspension state, and then the sediment is taken out of a pile hole along with the circulating mud by utilizing the adhesive force of mud colloid.
For large-diameter ultra-deep cast-in-place piles with pile diameter larger than 2m and pile depth larger than 60m, the secondary hole cleaning usually adopts a gas lift reverse circulation process. The common air lift reverse circulation secondary hole cleaning method generally adopts the steps that an air supply rubber hose of an air compressor is bound on the outer wall of a perfusion conduit and is put into a hole along with the perfusion conduit, and when the air compressor supplies air, the suction force formed by the air quantity fed into the hole is relatively small due to the large section in the hole, so that the hole cleaning effect is poor; meanwhile, the air pipes need to be bound and fixed at intervals during installation, and the problems of low installation efficiency and the like exist.
Disclosure of Invention
The invention aims to provide a gas-lift reverse circulation secondary hole cleaning slurry circulation system for a large-diameter ultra-deep pile, and aims to solve the problem that in the prior art, the hole cleaning effect of the conventional secondary hole cleaning mode is poor for a large-diameter ultra-deep cast-in-place pile.
The invention is realized in this way, the large-diameter ultra-deep pile gas lift reverse circulation secondary hole cleaning slurry circulation system comprises an air compressor, a joint elbow, an air supply rubber pipe, a slurry pipeline, a slurry circulation pipeline, a PVC air supply pipe and a sedimentation tank;
two ends of the joint elbow are respectively connected with one end of the slurry pipeline and one end of the slurry circulating pipeline, the other end of the slurry pipeline extends to the sedimentation tank, and the other end of the slurry circulating pipeline extends to a sediment position in the hole;
the PVC air supply pipe is arranged in the slurry circulating pipeline, one end of the PVC air supply pipe is communicated with the air supply rubber pipe, and the other end of the PVC air supply pipe extends towards the position of the sediment in the hole; the air supply rubber tube is connected with the air compressor.
Further, the joint elbow is in a curved arrangement; the joint elbow is provided with a connecting hole, and the air supply rubber pipe extends into the slurry circulating pipeline through the connecting hole and is connected with one end of the PVC air supply pipe.
Furthermore, one end of the joint elbow connected with the slurry pipeline is a first butt end, a first installation groove is formed in the outer surface of the first butt end, the first installation groove comprises a first groove position and a second groove position, one end of the first groove position extends to a port of the first butt end towards the direction of the slurry pipeline, the other end of the first groove position is communicated with one end of the second groove position, the other end of the second groove position bends towards the direction of the slurry pipeline and extends to form a first positioning end, and a gap is formed between the first positioning end and the port of the first butt end; the inner wall of the slurry pipeline is provided with a first bump, and the first bump is located at the first positioning end.
Furthermore, one end of the joint elbow connected with the slurry circulation pipeline is a second butt joint end; a second mounting groove is formed in the outer surface of the second butt joint end, one end of the second mounting groove extends to a port of the second butt joint end towards the direction of the slurry circulation pipeline, and the other end of the second mounting groove faces upwards and is arranged in an extending mode around the joint bent pipe to form a second positioning end; and a second lug is formed at one end of the slurry circulating pipeline and is positioned at the second positioning end.
Further, the bottom of the other end of the PVC air supply pipe is plugged to form a plugging end; and a plurality of air outlet holes which are arranged at intervals along the length direction of the PVC air supply pipe are arranged above the plugging end.
Furthermore, a positioning frame is arranged in the slurry circulating pipeline, and comprises a sleeve and a fixed rod; the PVC air supply pipe is sleeved with the sleeve, frame rods are arranged on two sides of the sleeve, the end parts of the frame rods are fixed at one end of the fixed rod, and the frame rods have elasticity; the other end of the fixed rod extends upwards; the mud circulation conduit is provided with a mounting hole, the other end of the fixed rod penetrates through the mounting hole, and the outer surface of the other end of the fixed rod is in a threaded shape; the fixing rod is in threaded connection with two fixing pieces, and the two fixing pieces are respectively located on the inner side and the outer side in the mounting hole.
Furthermore, a positioning groove is formed in the inner wall of the slurry circulation conduit, one end of the positioning groove extends to the mounting hole, and the other end of the positioning groove extends downwards; and the section depth of the positioning groove is gradually reduced along the direction from one end of the positioning groove to the other end of the positioning groove.
Further, the gas-lift reverse circulation secondary hole cleaning slurry circulation system for the large-diameter ultra-deep pile comprises a pressure relief device, wherein the pressure relief device comprises a base body, and a positioning hole is formed in the base body; and the other end of the slurry pipeline penetrates through the positioning hole and extends to the sedimentation tank.
Further, the positioning holes are arranged in a downward bending mode.
Furthermore, the outer surface of the seat body is provided with an outlet end, and the outlet end is communicated with the positioning hole; a connecting rod is arranged right above the outlet end, a positioning part is arranged at the end part of the connecting rod, the positioning part is downward in a V shape, and the positioning part is propped against the other end of the slurry pipeline.
Compared with the prior art, the large-diameter ultra-deep pile gas lift reverse circulation secondary hole cleaning slurry circulation system provided by the invention has the advantages that firstly, the other end of the slurry circulation pipeline is placed at a sediment position in a hole, the air compressor is started, high-pressure compressed air generated by the air compressor is sent into the hole through the air supply rubber tube and the PVC air supply pipe and is mixed with slurry, as the specific gravity of the compressed air sent into the hole is smaller than that of the slurry in the hole, a slurry-gas mixture with the density smaller than that of the slurry is formed in the slurry circulation pipeline, negative pressure is formed at the bottom end of the PVC air supply pipe in the slurry circulation pipeline, the pressure difference between the inside and the outside of the slurry circulation pipeline is continuously increased by continuously conveying the compressed air, and when a certain pressure difference is achieved, the slurry gas in the slurry circulation pipeline flows upwards along the slurry circulation pipeline; because the section of the slurry circulating pipeline is greatly smaller than the annular section area between the outer wall of the slurry circulating pipeline and the pile wall, reverse circulation with extremely high flow speed and flow is formed, and sediments in the circulating slurry carrying hole flow back out of the slurry circulating pipeline through the joint elbow and the slurry pipeline and flow into a sedimentation tank on the ground.
Drawings
FIG. 1 is a schematic plan view of a gas-lift reverse circulation secondary hole cleaning slurry circulation structure of a large-diameter ultra-deep pile provided by an embodiment of the invention;
FIG. 2 is a schematic front view of a positioning frame according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a pressure relief device provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram of a front view of a fitting elbow provided by an embodiment of the invention;
fig. 5 is a perspective view of an inner joint according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
Referring to fig. 1-5, preferred embodiments of the present invention are provided.
The large-diameter ultra-deep pile gas lift reverse circulation secondary hole cleaning slurry circulation system comprises anair compressor 100, ajoint elbow 200, an airsupply rubber pipe 420, aslurry pipeline 300, aslurry circulation pipeline 400, a PVCair supply pipe 410 and asedimentation tank 500;
two ends of thejoint elbow 200 are respectively connected with one end of theslurry pipeline 300 and one end of theslurry circulation pipeline 400, the other end of theslurry pipeline 300 extends to thesedimentation tank 500, and the other end of theslurry circulation pipeline 400 extends to a sediment position in the hole;
thePVC blast pipe 410 is arranged in the slurry circulatingpipeline 400, one end of thePVC blast pipe 410 is communicated with theblast rubber pipe 420, and the other end of thePVC blast pipe 410 extends towards the position of the sediments in the hole; and theair supply hose 420 is connected with theair compressor 100.
In the provided gas lift reverse circulation secondary hole cleaning slurry circulation system for the large-diameter ultra-deep pile, firstly, the sediment position in the hole is placed below the other end of theslurry circulation pipeline 400, theair compressor 100 is opened, high-pressure compressed air generated by theair compressor 100 is sent into the hole through the airsupply rubber tube 420 and the PVCair supply pipe 410 and is mixed with slurry, as the proportion of the compressed air sent into the hole is smaller than that of the slurry in the hole, a slurry-gas mixture with the density smaller than that of the slurry is formed in theslurry circulation pipeline 400, negative pressure is formed at the bottom end of the PVCair supply pipe 410 in theslurry circulation pipeline 400, the pressure difference between the inside and the outside of theslurry circulation pipeline 400 is continuously increased by continuously conveying the compressed air, and when a certain pressure difference is reached, the slurry-gas mixture in theslurry circulation pipeline 400 flows upwards along theslurry circulation pipeline 400; because the section of theslurry circulating pipeline 400 is greatly smaller than the annular section area between the outer wall of theslurry circulating pipeline 400 and the pile wall, reverse circulation with extremely high flow speed and flow is formed, and sediments in the circulating slurry carrying hole return out of theslurry circulating pipeline 400 through thejoint elbow 200 and theslurry pipeline 300 and flow into thesedimentation tank 500 on the ground.
Specifically, the flow of the secondary hole cleaning process of the large-diameter ultra-deep pile gas lift reverse circulation mudcirculation joint elbow 200 is as follows:
1. installing an orifice irrigation conduit, namely amud circulation pipe 400;
1) after the final hole is checked and accepted, immediately starting perfusion preparation work;
2) when theslurry circulation pipeline 400 is placed, a worker aligns theslurry circulation pipeline 400 at the central position right above the orifice and then starts to place the slurry circulation pipeline;
3) and when the mud circulation pipe is lowered to the upper part of the mud circulation pipe and is fixed at a position which is about 30cm away from the orifice, the next mud circulation pipe is hoisted and is connected firmly in sequence until the mud circulation pipe reaches the hole cleaning position, and themud circulation pipeline 400 is fixed at the orifice.
2. Lowering thePVC blast pipe 410; thePVC blast pipe 410 in this embodiment is a PVC pipe having an outer diameter of 50mm and a wall thickness of 3mm, and is configured without a joint in the whole pipe, so as to ensure good airtightness and shorten the lowering time of the deep hole.
1) Firstly, a worker shifts the wholePVC blast pipe 410 to the position where theslurry circulation pipeline 400 is placed; the length of thePVC blast pipe 410 in the guide pipe is generally about 2/3 of the drilling depth, in order to make the placement quick, a counterweight is specially arranged at the bottom of the PVC blast pipe, and three reinforcing steel bars with the diameter of 22mm and the length of about 100cm are bound with the PVC blast pipe to increase the weight of the PVC blast pipe;
2) before thePVC blast pipe 410 is lowered, whether the seal at the bottom end of thePVC blast pipe 410 and the balance weight at the lower end are firm or not and whether the PVC blast hole is smooth or not are checked;
3) when the PVCair supply pipe 410 is started to be lowered, 1 worker is arranged at the orifice to control the lowering, and the other worker is matched with the lowering until the PVCair supply pipe 410 reaches the hole cleaning position.
3. The PVC air pipe in theslurry circulation pipeline 400 is connected with thejoint elbow pipe 200;
1) hoisting thejoint elbow 200 to the orifice by using a crane, wherein thejoint elbow 200 is provided with aninternal joint 230, one end of theinternal joint 230 is butted with a connecting joint of aPVC blast pipe 410 placed in theslurry circulation pipeline 400, and the other end of theinternal joint 230 extends to the outside of thejoint elbow 200 and is connected with ablast rubber hose 420; wherein, the two ends of theinner joint 230 are provided withfirst connection discs 240, and the two ends of theinner joint 230 extend outwards to form extension sections; one end of the PVCair supply pipe 410, one end of the airsupply rubber pipe 420, which is connected with theinternal joint 230, are respectively provided with a second connectingdisc 480, the first connectingdisc 240 and the second connectingdisc 480 are respectively provided with a plurality of threadedholes 250, the plurality of threadedholes 250 are arranged at intervals, and the first connectingdisc 240 and the threadedholes 250 on the second connectingdisc 480 are in one-to-one correspondence.
The two extension sections of theinternal joint 230 are respectively embedded into thePVC blast pipe 410 and theblast rubber hose 420, and thefirst connection disc 240 and thesecond connection disc 480 are fixed by screws through thefirst connection disc 240 and thesecond connection disc 480, so that thePVC blast pipe 410 and theblast rubber hose 420 are communicated by theinternal joint 230.
2) Thejoint elbow 200 is connected to themud circulation line 400.
4. Thejoint elbow 200 is connected with thePVC blast pipe 410 and theair compressor 100;
1) placing theair compressor 100 at a designated position, and connecting aPVC blast pipe 410 to an air outlet of theair compressor 100 through ablast rubber hose 420;
(2) theinner joint 230 and thejoint elbow 200 are connected and the nut is screwed to ensure good airtightness.
5. Thejoint elbow 200 is connected with aslurry pipeline 300, in the embodiment, theslurry pipeline 300 adopts a rubber pipe with 12-inch signals, and the length is determined according to the arrangement of pipelines on site;
1) connecting theslurry pipeline 300 to the slurry outlet of thejoint elbow 200 through a steel wire;
2) the reverse circulation system generates larger pressure, so the slurry output is also larger, and the slurry which returns quickly can cause the rubber tube to swing, so the tail end of the slurry rubber tube is arranged on a pressure-relief device.
6. Starting theair compressor 100 to supply air for secondary hole cleaning; in this embodiment, ZHIGAO90SDY air compressor 100 is adopted and selectedWith an exhaust gas volume of 12.8m3A/min air compressor 100 with power of 90 kw;
1) opening theair compressor 100, and starting to perform secondary hole cleaning;
2) in the secondary hole cleaning process, thejoint elbow 200 is always suspended by the crane, and theslurry circulating pipeline 400 can be lifted up and down slightly to keep the hole cleaning effect.
3) When cleaning the hole, the mud amount returned to thesedimentation tank 500 from themud circulation pipeline 400 is always kept balanced with the mud amount returned to the hole, so that the height of the mud surface in the hole is ensured, and the hole wall is stable.
4) In the hole cleaning process, people are sent regularly to measure the sediment thickness and the slurry performance index in the hole, and after the design and specification requirements are met, secondary hole cleaning is finished.
According to the large-diameter ultra-deep pile gas-lift reverse circulation secondary hole cleaning system, high-pressure air generated by theair compressor 100 is directly sent into the filling guide pipe, so that reverse circulation with great flow velocity and flow is generated, and the problems of poor air supply effect, low hole cleaning efficiency and the like in the traditional method are fundamentally solved.
The whole gas lift reverse circulation secondary hole cleaning system is simple in structure, easy to machine on site, connected by bolts and steel wires and convenient to install and operate.
When the whole gas lift reverse circulation secondary hole cleaning system is installed on site, the requirement can be met by only 2-3 operators, the hole cleaning speed is high, and the work efficiency is greatly improved; the method can be repeatedly used, has strong applicability and greatly reduces the construction cost.
Thejoint elbow 200 is arranged in a bent manner, two ends of thejoint elbow 200 are respectively connected with theslurry pipeline 300 and theslurry circulating pipeline 400, and thejoint elbow 200 can be of a steel tubular elbow structure; thejoint elbow 200 is provided with a connection hole, and theair supply hose 420 extends into theslurry circulation pipe 400 through the connection hole to be connected with one end of the PVCair supply pipe 410.
The end of thejoint elbow 200 connected with themud pipe 300 is a first butt end, the outer surface of the first butt end is provided with a plurality of first mounting grooves, each first mounting groove comprises afirst slot 210 and asecond slot 220, one end of thefirst slot 210 extends towards themud pipe 300, the other end of thefirst slot 210 is communicated with one end of thesecond slot 220, the other end of thesecond slot 220 is bent and extends towards themud pipe 300, and a gap is formed between the other end of thesecond slot 220 and the port of the first butt end to form a first positioning end.
Correspondingly, the diameter of theslurry pipeline 300 is larger than that of thejoint elbow 200, a first bump is arranged on the inner wall of one end, butted with thejoint elbow 200, of theslurry pipeline 300, during installation, the first bump enters from one end of thefirst slot 210, moves towards the other end of thefirst slot 210, then enters thesecond slot 220, and finally theslurry pipeline 300 is rotated to enable the first bump to move along the bending direction of thesecond slot 220 until the first bump is consistent with the end position of the other end of thesecond slot 220; because mud flows from the elbow fitting 200 toward themud pipe 300, an impulse is applied to themud pipe 300 in a direction away from theelbow fitting 200, and the first protrusion is located at the first locating end to securely fasten themud pipe 300 to theelbow fitting 200.
The end of the joint elbow 200 connected with the slurry circulation pipeline is a second butt end; a second mounting groove 260 is formed in the outer surface of the second butt end, one end of the second mounting groove 260 extends to a port of the second butt end in the direction of the slurry circulation pipeline 400, and the other end of the second mounting groove 260 faces upward and is arranged in an extending manner around the joint elbow to form a second positioning end 270; the second bump is formed at one end of the slurry circulation pipeline, when the slurry circulation pipeline 400 is connected with the joint elbow 200, the second bump is aligned to one end of the second installation groove 260, then the slurry circulation pipeline 400 is rotated along the extending direction of the second installation groove 260, or the joint elbow 200 is circulated, so that the second bump is moved to the second positioning end 270, at the moment, the connection of the slurry circulation pipeline 400 and the joint elbow 200 is completed, upward impulsive force is exerted on the slurry circulation pipeline 400 due to slurry upstream, the second installation groove 260 can play a role in positioning, the slurry circulation pipeline 400 is effectively prevented from moving, and the connection of the slurry circulation pipeline 400 and the joint elbow 200 is more stable.
Further, in order to enable the air generated by theair compressor 100 to be smoothly conveyed to the bottom of the perfusion conduit, the bottom of the other end of the PVCair supply pipe 410 is blocked to form a blocking end, so that slurry is prevented from entering from the other end of the PVCair supply pipe 410 to affect the air supply effect; and a plurality of air outlet holes 440 for high-pressure air to flow out are formed in the range of 100cm upwards from the bottom, the diameter of eachair outlet hole 440 is 5mm, the hole spacing is 15cm, the air outlet holes 440 are arranged at intervals along the length direction of thePVC blast pipe 410, and the air outlet holes 440 are uniformly arranged on two sides of the blast pipe.
Further, a positioning frame is arranged in theslurry circulation pipeline 400, the other end of the PVCair supply pipe 410 is positioned through the positioning frame, due to the fact that high-pressure air is input, certain influence can be caused on the PVCair supply pipe 410, such as position change and the like, in the secondary hole cleaning process, the PVCair supply pipe 410 is located in the middle of theslurry circulation pipeline 400 and is optimal in cleaning effect, the high-pressure air can be dispersed from the middle of theslurry circulation pipeline 400, it is ensured that pressure values on the periphery of the inner wall of theslurry circulation pipeline 400 are consistent, therefore, pressure differences inside and outside theslurry circulation pipeline 400 are consistent, accordingly, sediment entering theslurry circulation pipeline 400 from the periphery of theslurry circulation pipeline 400 is uniform, the situation that the pressure difference is large and the pressure difference is small cannot occur, and when the peripheral pressure difference is inconsistent, the position with the large pressure difference is prone to generate depression, and therefore hole cleaning efficiency is reduced.
Wherein the positioning frame comprises asleeve 450 and a fixingrod 470; the PVCair supply pipe 410 is sleeved on thesleeve 450, the two sides of thesleeve 450 are respectively provided with asupport rod 460, one end of the fixingrod 470 is fixed at the end part of thesupport rod 460, and thesupport rod 460 has elasticity; the other end of the fixingbar 470 extends upward; the mud circulation conduit is provided with a mounting hole, the other end of the fixingrod 470 penetrates through the mounting hole, and the outer surface of the other end of the fixingrod 470 is in a thread shape; the fixingrod 470 is threadedly connected with two fixing members, and the two fixing members are respectively located at the inner side and the outer side of the mounting hole.
Since theframe bar 460 has elasticity, when the width of the entire positioning frame is greater than the diameter of theslurry circulation pipe 400, theframe bar 460 is bent, and since the plurality ofair outlets 440 are uniformly distributed on both sides of the PVCair supply pipe 410, theframe bar 460 can be arranged on the other two sides of the PVCair supply pipe 410 except for the two sides provided with theair outlets 440, thereby preventing theframe bar 460 from weakening the effect of the high pressure air flowing out of theair outlets 440.
A positioning groove is arranged on the inner wall of theslurry circulating pipeline 400, one end of the positioning groove extends to the mounting hole, and the other end of the positioning groove extends downwards; the section depth of the positioning groove is gradually reduced along the direction from one end of the positioning groove to the other end of the positioning groove; thedead lever 470 imbeds in the constant head tank, plays the positioning action todead lever 470, and the locating rack removes when avoiding mud sediment backward flow.
Further, the gas lift reverse circulation secondary hole cleaning structure comprises a pressure relief device, the pressure relief device comprises abase body 600, and apositioning hole 610 is formed in thebase body 600; one end of the hole cleaning pipeline extends to the position of a hole to be cleaned, the other end of the hole cleaning pipeline penetrates through thepositioning hole 610 and extends into thesedimentation tank 500, the other end of the hole cleaning pipeline is fixed by thebase body 600, and the situation that slurry flows out of thesedimentation tank 500 and swings at the other end of the hole cleaning pipeline due to overlarge impact force is avoided.
From last to extremely down, the cross-sectional area ofpedestal 600 enlarges gradually, makes the stability ofpedestal 600 increase, and the pressure effect that disappears is better.
Furthermore, thepositioning hole 610 is arranged in a downward bending manner, so that the other end port of the hole cleaning pipeline passing through thepositioning hole 610 faces downward and just faces thesedimentation tank 500, and the mud in the hole cleaning pipeline is ensured to smoothly flow out to thesedimentation tank 500.
The outer surface of theseat body 600 is provided with an outlet end which is communicated with thepositioning hole 610; be equipped with connectingrod 630 directly over the exit end, the tip of connectingrod 630 is equipped withlocation portion 620,location portion 620 is "V" style of calligraphy down,location portion 620 supports the other end of pressing clear hole pipeline, thereby stabilize clear hole pipeline once more, and the surface ofpedestal 600 is equipped with the fixing base that is used for fixedconnection pole 630, the fixing base includes two articulated locatingpieces 640 of arranging, form the location space between two locatingpieces 640, the tip of two locatingpieces 640 passes through nut thread tightening,fix connecting rod 630 in the location space.
For the hole cleaning pipelines with different diameters, when the diameter of the hole cleaning pipeline is smaller than that of thepositioning hole 610, the positioning effect of thepositioning hole 610 is reduced, at this time, thepositioning part 620 is abutted against the hole cleaning pipeline by adjusting the height of thepositioning part 620, and the hole cleaning pipeline is positioned in thepositioning hole 610, so that a better positioning effect is ensured.
Further, locatingpiece 640 is arranged towards the orientation bending of the interval of location, and two locatingpieces 640 encircle the interval of location, and is fixed with connectingrod 630, and the locatingpiece 640 that the bending was arranged more laminates with connectingrod 630, and fixed effect is better to makelocation portion 620 better to the location effect of clear hole pipeline.
Lantern rings are respectively arranged on two sides of theseat body 600, positioning rods are sleeved on the lantern rings, and the positioning rods are in threaded connection with the lantern rings; the locating rods are longitudinally arranged, the downward ends of the locating rods are in a taper shape, and one ends of the locating rods are inserted into the ground, so that the stability of theseat body 600 is kept.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The large-diameter ultra-deep pile gas-lift reverse circulation secondary hole cleaning slurry circulation system is characterized by comprising an air compressor, a joint elbow, an air supply rubber pipe, a slurry pipeline, a slurry circulation pipeline, a PVC air supply pipe and a sedimentation tank;
two ends of the joint elbow are respectively connected with one end of the slurry pipeline and one end of the slurry circulating pipeline, the other end of the slurry pipeline extends to the sedimentation tank, and the other end of the slurry circulating pipeline extends to a sediment position in the hole;
the PVC air supply pipe is arranged in the slurry circulating pipeline, one end of the PVC air supply pipe is communicated with the air supply rubber pipe, and the other end of the PVC air supply pipe extends towards the position of the sediment in the hole; the air supply rubber tube is connected with the air compressor.
2. The large-diameter ultra-deep pile gas-lift reverse circulation secondary hole cleaning mud circulating system of claim 1, wherein the joint elbow is in a curved arrangement; the joint elbow is provided with a connecting hole, and the air supply rubber pipe extends into the slurry circulating pipeline through the connecting hole and is connected with one end of the PVC air supply pipe.
3. The large-diameter ultra-deep pile gas-lift reverse circulation secondary hole cleaning mud circulating system according to claim 1, wherein one end of the joint elbow connected with the mud pipeline is a first butt end, a first mounting groove is formed in the outer surface of the first butt end, the first mounting groove comprises a first groove position and a second groove position, one end of the first groove position extends to a port of the first butt end in the direction towards the mud pipeline, the other end of the first groove position is communicated with one end of the second groove position, the other end of the second groove position extends in a bending mode towards the mud pipeline to form a first positioning end, and a gap is formed between the first positioning end and the port of the first butt end; the inner wall of the slurry pipeline is provided with a first bump, and the first bump is located at the first positioning end.
4. The large-diameter ultra-deep pile gas-lift reverse circulation secondary hole cleaning slurry circulation system according to claim 1, wherein one end of the joint elbow connected with the slurry circulation pipeline is a second butt joint end; a second mounting groove is formed in the outer surface of the second butt joint end, one end of the second mounting groove extends to a port of the second butt joint end towards the direction of the slurry circulation pipeline, and the other end of the second mounting groove faces upwards and is arranged in an extending mode around the joint bent pipe to form a second positioning end; and a second lug is formed at one end of the slurry circulating pipeline and is positioned at the second positioning end.
5. The large-diameter ultra-deep pile air-lift reverse circulation secondary hole cleaning slurry circulation system as claimed in any one of claims 1 to 4, wherein the bottom of the other end of the PVC blast pipe is blocked to form a blocked end; and a plurality of air outlet holes which are arranged at intervals along the length direction of the PVC air supply pipe are arranged above the plugging end.
6. The large-diameter ultra-deep pile gas-lift reverse circulation secondary hole cleaning slurry circulation system according to claim 5, wherein a positioning frame is arranged in the slurry circulation pipeline, and the positioning frame comprises a sleeve and a fixing rod; the PVC air supply pipe is sleeved with the sleeve, frame rods are arranged on two sides of the sleeve, the end parts of the frame rods are fixed at one end of the fixed rod, and the frame rods have elasticity; the other end of the fixed rod extends upwards; the mud circulation conduit is provided with a mounting hole, the other end of the fixed rod penetrates through the mounting hole, and the outer surface of the other end of the fixed rod is in a threaded shape; the fixing rod is in threaded connection with two fixing pieces, and the two fixing pieces are respectively located on the inner side and the outer side in the mounting hole.
7. The large-diameter ultra-deep pile gas-lift reverse circulation secondary hole cleaning slurry circulation system as claimed in claim 6, wherein a positioning groove is formed in the inner wall of the slurry circulation conduit, one end of the positioning groove extends to the mounting hole, and the other end of the positioning groove extends downwards; and the section depth of the positioning groove is gradually reduced along the direction from one end of the positioning groove to the other end of the positioning groove.
8. The large-diameter ultra-deep pile air-lift reverse circulation secondary hole cleaning slurry circulation system according to any one of claims 1 to 4, wherein the large-diameter ultra-deep pile air-lift reverse circulation secondary hole cleaning slurry circulation system comprises a pressure relief device, the pressure relief device comprises a base body, and a positioning hole is formed in the base body; and the other end of the slurry pipeline penetrates through the positioning hole and extends to the sedimentation tank.
9. The large-diameter ultra-deep pile gas-lift reverse circulation secondary hole cleaning slurry circulation system according to claim 8, wherein the positioning holes are arranged in a downward bent manner.
10. The large-diameter ultra-deep pile gas-lift reverse circulation secondary hole cleaning slurry circulation system as claimed in claim 9, wherein the outer surface of the seat body is provided with an outlet end, and the outlet end is communicated with the positioning hole; a connecting rod is arranged right above the outlet end, a positioning part is arranged at the end part of the connecting rod, the positioning part is downward in a V shape, and the positioning part is propped against the other end of the slurry pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110574215.4ACN113236160B (en) | 2021-05-25 | 2021-05-25 | Gas-lift reverse circulation secondary hole cleaning slurry circulation system for large-diameter ultra-deep pile |
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| CN202110574215.4ACN113236160B (en) | 2021-05-25 | 2021-05-25 | Gas-lift reverse circulation secondary hole cleaning slurry circulation system for large-diameter ultra-deep pile |
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| US4534427A (en)* | 1983-07-25 | 1985-08-13 | Wang Fun Den | Abrasive containing fluid jet drilling apparatus and process |
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| CN105649559A (en)* | 2016-03-22 | 2016-06-08 | 中国五冶集团有限公司 | Device and method for removing hole bottom sediment of pore-forming pouring pile |
- 2021
- 2021-05-25CNCN202110574215.4Apatent/CN113236160B/enactiveActive
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4534427A (en)* | 1983-07-25 | 1985-08-13 | Wang Fun Den | Abrasive containing fluid jet drilling apparatus and process |
| CN2272459Y (en)* | 1995-04-10 | 1998-01-14 | 中国建筑科学研究院地基基础研究所 | Pile-side mortar-pressing device for mud wall-protection pouring pile |
| CN101109179A (en)* | 2007-06-21 | 2008-01-23 | 河北建设勘察研究院有限公司 | Gas lifting reverse circulation porus cleaning construction method for slurry bulkhead cast-in-situ bored pile |
| CN102465536A (en)* | 2010-11-12 | 2012-05-23 | 石峰 | Diaphragm wall groove section gas lift method hole cleaning construction process |
| CN105649559A (en)* | 2016-03-22 | 2016-06-08 | 中国五冶集团有限公司 | Device and method for removing hole bottom sediment of pore-forming pouring pile |
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|---|---|
| CN113236160B (en) | 2022-09-02 |
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