Building pile foundation detection deviceTechnical Field
The invention relates to a detection device, in particular to a building pile foundation detection device applied to the field of building pile foundations.
Background
The main method for pile foundation detection includes static load test, drilling core method, low strain method, high strain method, sound wave transmission method, etc. in the strain change test, pile top is knocked by small hammer, the sensor adhered to pile top is used to receive stress wave signal from pile, the stress wave theory is adopted to research the dynamic response of pile soil system, and the measured speed signal and frequency signal are inversely analyzed to obtain the integrity of pile.
When the low strain method is used for detection, the traditional operation mode is that a tape measure is manually used for measuring the diameter of the pile foundation, then a detection position and a knocking position are selected according to the diameter of the pile foundation, a plurality of measurement points are generally required to be measured for improving the accuracy of measurement, the multiple times of knocking are carried out nearby the same measurement point, a knocking hammer is manually used for knocking for multiple times, the measurement position is required to be replaced, the tape measure is used during measurement, the positioning accuracy of the measurement points and the knocking point is not high, the accuracy of subsequent data analysis is affected, the operation is complex, and the waveform sampling is low-efficiency.
Disclosure of Invention
Aiming at the prior art, the invention aims to solve the technical problems that the traditional low strain method is complex in operation and low in positioning sampling when detecting pile foundations.
In order to solve the problems, the invention provides a building pile foundation detection device, which comprises a holding cylinder, wherein the upper end of the holding cylinder is fixedly connected with a detector, the middle part of the holding cylinder is provided with a clamping mechanism for fixing the holding cylinder on a pile foundation, the lower end of the holding cylinder is fixedly connected with a mounting pipe, the mounting pipe is provided with a first positioning mechanism, the first positioning mechanism is provided with a waveform sensor, the first positioning mechanism is used for adjusting the position of the waveform sensor, the upper part of the first positioning mechanism is provided with a second positioning mechanism, the second positioning mechanism is provided with a vibration hammer, and the second positioning mechanism is used for adjusting the position of the vibration hammer; the first positioning mechanism comprises a rotating arm which is rotatably sleeved on the mounting pipe, a toothed ring is fixedly connected at the sleeved part of the mounting pipe and the rotating arm, a first driving gear is meshed with the toothed ring, the first driving gear is fixedly connected with a rotating motor which is fixedly connected with the inner wall of the rotating arm, and the rotating motor drives the first driving gear to roll on the toothed ring; the upper part of the gear ring is provided with a first photoelectric encoder which monitors the rotation position of the rotating arm; the lower part of the rotating arm is connected with a moving block in a sliding manner, the moving block is connected with a horizontal screw rod in a threaded manner, the horizontal screw rod is connected with a screw rod motor, a second photoelectric encoder is arranged on an output shaft of the screw rod motor, and the second photoelectric encoder monitors the position of the moving block; the second positioning mechanism and the first positioning mechanism are identical in structure, the waveform sensor is mounted on a first moving block of the first positioning mechanism, the exciting hammer is mounted on a second moving block of the second positioning mechanism, and an electric telescopic rod connected with the waveform sensor is mounted in the first moving block.
In the building pile foundation detection device, rapid positioning sampling of multiple detection points and multiple hammering points is realized through the first positioning mechanism connected with the waveform sensor and the second positioning mechanism connected with the exciting hammer.
As a further improvement of the application, the clamping mechanism comprises a pair of clamping plates which are abutted against the circumferential edge of the pile foundation, the inner sides of the pair of clamping plates are fixedly connected with rack bars which are centrosymmetric and penetrate through the holding cylinder in a sliding manner, a second driving gear which is respectively meshed with the pair of rack bars is arranged in the holding cylinder, the second driving gear is connected with a clamping motor which is arranged in the holding cylinder, and a first infrared distance sensor which is arranged opposite to the inner wall of the clamping plates is arranged below the second driving gear.
As a further improvement of the application, the first moving block is provided with a vertical cavity for accommodating the electric telescopic rod and the waveform sensor, a conical cavity penetrating the first moving block is communicated below the vertical cavity, a liquid injection pipe is communicated with the conical cavity, a liquid storage pipe installed in the rotating arm is communicated with the liquid injection pipe, a coupling agent is filled in the liquid storage pipe, a piston disc is nested in the liquid storage pipe, the piston disc is connected with a pushing piston cylinder, and a second infrared distance sensor opposite to the piston disc is fixedly connected in the liquid storage pipe.
As a further improvement of the application, the clamping motor, the first infrared distance sensor, two rotating motors, two screw rod motors, two first photoelectric encoders, two second photoelectric encoders, the second infrared distance sensor, the pushing piston cylinder, the electric telescopic rod, the vibration hammer, the waveform sensor and other power devices and sensing devices are electrically connected with the detector, an automatic sampling system is arranged in the detector, and the automatic sampling system comprises a pile foundation radius detection module, a detection point selection module, a hammering point selection module, a sampling execution module and a waveform collection module.
As a further improvement of the application, the exciting hammer is an electromagnetic hammer.
As a further improvement of the application, the lower part of the clamping plate is fixedly connected with a clamping plate, and the lower end of the clamping plate is rotationally connected with an abutting roller which abuts against the circumferential side wall of the pile foundation.
As a further improvement of the application, the wave sensor is rotationally connected with the electric telescopic rod through the rotating rod, the rotating rod is fixedly connected with a sliding rod vertical to the rotating rod, and a spiral groove for the sliding rod to slide is formed in the vertical cavity.
The application method of the building pile foundation detection device comprises the following steps:
Step one, manually holding the holding cylinder, starting a clamping mechanism through a touch display screen of the detector, clamping the pile foundation by the clamping mechanism, and measuring the radius of the pile foundation through a first infrared distance sensor;
Selecting detection points by using detection point selection modules of a detector based on the radius of the pile foundation, and selecting hammering points by using hammering point selection modules based on the selected detection points;
Starting a sampling execution module based on the selected detection point and the hammering point, wherein the sampling execution module executes the following substeps:
S1, starting a first positioning mechanism to enable a waveform sensor to move to the position above a first detection point;
S2, firstly starting a pushing piston cylinder, injecting a couplant into a conical cavity of the first moving block, and then starting an electric telescopic rod, so that the waveform sensor moves downwards and pushes the couplant to be in contact with the top surface of the pile foundation;
S3, starting a second positioning mechanism, enabling the exciting hammer to move to the hammering point position by the second positioning mechanism according to the selected hammering point position, and then starting the exciting hammer and collecting waveforms through a waveform collecting module;
s4, repeating the step S-S to finish waveform sampling of a plurality of detection points and a plurality of hammering points;
And step four, starting the clamping motor to enable the clamping plate to be separated from the pile foundation, so as to realize device disassembly.
The beneficial effects are that: (1) According to the invention, the first positioning mechanism for adjusting the position of the waveform sensor and the second positioning mechanism for adjusting the position of the exciting hammer are used for rapidly positioning according to the set detection point and the set hammering point during sampling operation, so that the positioning accuracy of the detection point and the hammering point is improved, and the accuracy of the subsequent waveform acquisition is improved; in addition, through first positioning mechanism and second positioning mechanism convenient quick replacement check point and hammering point, be fit for multiple spot multiple sampling, compare the loaded down with trivial details operation of artifical multiple sampling, improved the convenience of operation, improved the speed of sampling.
(2) According to the invention, the coupling agent is extruded and paved on the pile top from the vertical cavity when the electric telescopic rod pushes the waveform sensor to descend by utilizing the pushing piston cylinder to extrude the coupling agent into the conical cavity through the vertical cavity arranged in the first moving block and the liquid storage pipe communicated with the vertical cavity, so that the waveform sensor can better collect stress wave signals; in addition, the automatic injection and spreading of the couplant are realized, the automation of the device is improved, and the sampling efficiency is further improved.
(3) According to the invention, through the rotating rod arranged between the electric telescopic rod and the waveform sensor and the sliding rod fixedly connected with the rotating rod, when the waveform sensor moves up and down, the sliding rod slides in the spiral groove in the vertical cavity, so that the waveform sensor can rotate downwards when the couplant is extruded and can rotate upwards when the couplant is separated, and the paving effect when the couplant is extruded and the separating effect when the waveform sensor is separated from the couplant are improved.
(4) According to the invention, the device is rapidly clamped and fixed at the top of the pile foundation through the clamping mechanism and the first infrared distance sensor arranged on the clamping mechanism, and the radius measurement of the pile foundation is synchronously completed, so that the dismounting device and the subsequent determination of the detection point and the hammering point are facilitated.
Drawings
FIG. 1 is a schematic diagram of a construction pile foundation detection device and pile foundation clamping according to the present application;
FIG. 2 is a schematic cross-sectional view of a first positioning mechanism and a second positioning mechanism according to the present application;
FIG. 3 is a schematic view of an assembly of a first positioning mechanism and mounting tube of the present application;
FIG. 4 is a schematic illustration of the communication between a conical chamber and a reservoir in accordance with the present application;
FIG. 5 is an enlarged schematic view of the structure shown at A in FIG. 4;
FIG. 6 is a schematic cross-sectional view of a second movable block according to the present application;
FIG. 7 is a schematic view of an exploded view of the clamping mechanism of the present application;
FIG. 8 is a schematic perspective view of a clamping plate and rack bar according to the present application;
FIG. 9 is a schematic view showing a moving state of the damper according to the present application;
FIG. 10 is a schematic view of the assembly of the wave sensor and the electric telescopic rod of the present application;
FIG. 11 is a schematic cross-sectional view of a first movable block according to the present application;
fig. 12 is a schematic illustration of couplant extrusion paving in accordance with the present application;
fig. 13 is a schematic diagram showing a state that the waveform sensor is separated from the couplant in the present application.
The reference numerals in the figures illustrate:
1. A grip barrel; 2. a clamping mechanism; 3. installing a pipe; 4. a first positioning mechanism; 5. a waveform sensor; 6. a second positioning mechanism; 7. exciting a hammer; 8. a detector; 9. a rotating arm; 10. a toothed ring; 11. a first drive gear; 12. a rotating motor; 13. a first photoelectric encoder; 14. a moving block; 1401. a first moving block; 1402. a second moving block; 1403. a vertical cavity; 1404. a conical cavity; 1405. a spiral groove; 15. a horizontal screw rod; 16. a screw motor; 17. a second photoelectric encoder; 18. a clamping plate; 19. a contact roller; 20. a clamping plate; 21. a rack bar; 22. a second drive gear; 23. clamping the motor; 24. a first infrared distance sensor; 25. a liquid injection pipe; 26. a liquid storage tube; 27. pushing the piston cylinder; 28. a second infrared distance sensor; 29. a feeding tube; 30. a rotating lever; 31. an electric telescopic rod; 32. a sliding rod.
Detailed Description
2 Embodiments of the present application will be described in detail with reference to the accompanying drawings.
Embodiment 1:
1-9 show a building pile foundation detection device, including holding a section of thick bamboo 1, holding a section of thick bamboo 1 upper end fixedly connected with detector 8, holding a section of thick bamboo 1 mid-mounting has the fixture 2 that fixes it on the pile foundation, holding a section of thick bamboo 1 lower extreme fixedly connected with installation pipe 3, install first positioning mechanism 4 on the installation pipe 3, install waveform sensor 5 on the first positioning mechanism 4, first positioning mechanism 4 is used for adjusting waveform sensor 5's position, install second positioning mechanism 6 above the first positioning mechanism 4, install the shock hammer 7 on the second positioning mechanism 6, second positioning mechanism 6 is used for adjusting the position of shock hammer 7;
The first positioning mechanism 4 comprises a rotating arm 9 which is rotatably sleeved on the mounting tube 3, a toothed ring 10 is fixedly connected at the sleeved position of the mounting tube 3 and the rotating arm 9, a first driving gear 11 is meshed with the toothed ring 10, a rotating motor 12 which is fixedly connected with the inner wall of the rotating arm 9 is fixedly connected with the first driving gear 11, and the rotating motor 12 drives the first driving gear 11 to roll on the toothed ring 10; the upper part of the gear ring 10 is provided with a first photoelectric encoder 13, and the first photoelectric encoder 13 monitors the rotation position of the rotating arm 9; the lower part of the rotating arm 9 is connected with a moving block 14 in a sliding way, the moving block 14 is connected with a horizontal screw rod 15 in a threaded way, the horizontal screw rod 15 is connected with a screw rod motor 16, a second photoelectric encoder 17 is arranged on an output shaft of the screw rod motor 16, and the second photoelectric encoder 17 monitors the position of the moving block 14; the second positioning mechanism 6 and the first positioning mechanism 4 have the same structure, the waveform sensor 5 is mounted on a first moving block 1401 of the first positioning mechanism 4, the exciting hammer 7 is mounted on a second moving block 1402 of the second positioning mechanism 6, and an electric telescopic rod 31 connected with the waveform sensor 5 is mounted in the first moving block 1401.
Specifically, referring to fig. 9, when pile foundation detection is performed, the waveform sensor 5 is quickly moved to a set detection point position by the first positioning mechanism 4, then the waveform sensor 5 is close to the detection point by the electric telescopic rod 31, then the exciting hammer 7 is quickly moved to each hammering point position by the second positioning mechanism 6, so that quick positioning of the waveform sensor 5 and the exciting hammer 7 is realized, and sampling of multiple detection points and multiple hammering points is automatically realized in the pile foundation detection process by a low stress method.
Referring to fig. 7, the clamping mechanism 2 includes a pair of clamping plates 18 abutted to the circumferential edge of the pile foundation, rack bars 21 which are centrosymmetric and slidably penetrate through the holding cylinder 1 are fixedly connected to the inner sides of the pair of clamping plates 18, second driving gears 22 respectively meshed with the pair of rack bars 21 are arranged in the holding cylinder 1, a clamping motor 23 installed in the holding cylinder 1 is connected to the second driving gears 22, and a first infrared distance sensor 24 opposite to the inner wall of the clamping plates 18 is arranged below the second driving gears 22.
Specifically, the second driving gear 22 is driven to rotate by the clamping motor 23, the second driving gear 22 drives the pair of rack bars 21 to move oppositely or back to back, the pair of rack bars 21 drives the pair of clamping plates 18 to clamp and release the pile foundation, the whole quick fixing of the detection device is achieved, meanwhile, the distance from the center of the holding cylinder 1 to the inner wall of the clamping plates 18 is monitored by the first infrared distance sensor 24, the distance is equal to the radius of the pile foundation, the radius of the pile foundation is further quickly measured, and the follow-up setting of the hammering point and the detection point position is facilitated.
Referring to fig. 8, a clamping plate 20 is fixedly connected to the lower portion of the clamping plate 18, and an abutment roller 19 abutting against the circumferential sidewall of the pile foundation is rotatably connected to the lower end of the clamping plate 20.
Specifically, through being equipped with cardboard 20 and butt roller 19 for grip block 18 carries out quick stable centre gripping to the pile foundation, improves operating efficiency, is convenient for follow-up sampling operation.
Referring to fig. 4, 5 and 11, a first moving block 1401 is provided with a vertical cavity 1403 for accommodating an electric telescopic rod 31 and a waveform sensor 5, a conical cavity 1404 penetrating the first moving block 1401 is communicated below the vertical cavity 1403, a liquid injection pipe 25 is communicated with the conical cavity 1404, a liquid storage pipe 26 installed in a rotating arm 9 is communicated with the liquid injection pipe 25, a coupling agent is filled in the liquid storage pipe 26, a piston disc is nested in the liquid storage pipe 26, a pushing piston cylinder 27 is connected with the piston disc, and a second infrared distance sensor 28 opposite to the piston disc is fixedly connected in the liquid storage pipe 26.
Referring to fig. 4, the wave sensor 5 has a truncated cone-shaped structure, the conical cavity 1404 has a conical shape with a wide upper portion and a narrow lower portion, the diameter of the lower end of the conical cavity is equal to that of the wave sensor 5, the liquid injection tube 25 penetrates the first moving block 1401 and extends to the side wall of the conical cavity 1404, the wave sensor 5 is located above the conical cavity 1404 in an initial state, the end portion of the liquid storage tube 26 is communicated with the feeding tube 29 extending to the upper portion of the rotating arm 9, and the feeding tube 29 is in threaded connection with a threaded cover.
Specifically, the piston disc is pushed to move in the liquid storage tube 26 by pushing the piston cylinder 27, the couplant is injected into the conical cavity 1404 through the liquid injection tube 25, and the injection amount of the couplant is monitored by the second infrared distance sensor 28; after the couplant is injected into the conical cavity 1404, the electric telescopic rod 31 pushes the waveform sensor 5 to move downwards, and the waveform sensor 5 pushes the couplant to be discharged downwards, so that the couplant is fully filled between the waveform sensor 5 and the top surface of the pile foundation, the spreading uniformity of the couplant is improved, and the detection accuracy is further improved.
In this embodiment, the exciting hammer 7 is an electromagnetic hammer, so that the hammering force can be controlled conveniently.
Referring to fig. 1-4, a clamping motor 23, a first infrared distance sensor 24, two rotating motors 12, two screw motors 16, two first photoelectric encoders 13, two second photoelectric encoders 17, a second infrared distance sensor 28, a pushing piston cylinder 27, an electric telescopic rod 31, a exciting hammer 7, a waveform sensor 5 and other power devices and sensing devices are electrically connected with a detector 8, and an automatic sampling system is arranged in the detector 8, wherein the automatic sampling system comprises a pile foundation radius detection module, a detection point selection module, a hammering point selection module, a sampling execution module and a waveform collection module.
Specifically, the application method comprises the following steps:
Step one, manually holding the holding cylinder 1, starting the clamping mechanism 2 through a touch display screen of the detector 8, clamping the pile foundation by the clamping mechanism 2, and measuring the radius of the pile foundation through the first infrared distance sensor 24;
Secondly, selecting detection points by using detection point selection modules of the detector 8 based on the radius of the pile foundation, and selecting hammering points by using hammering point selection modules based on the selected detection points;
Starting a sampling execution module based on the selected detection point and the hammering point, wherein the sampling execution module executes the following substeps:
s1, starting a first positioning mechanism 4 to enable a waveform sensor 5 to move to the position above a first detection point;
S2, firstly starting the pushing piston cylinder 27, injecting the couplant into the conical cavity 1404 of the first moving block 1401, and then starting the electric telescopic rod 31, so that the waveform sensor 5 moves downwards and pushes the couplant to be in contact with the top surface of the pile foundation;
S3, starting a second positioning mechanism 6, enabling the exciting hammer 7 to move to the hammering point position by the second positioning mechanism 6 according to the selected hammering point position, starting the exciting hammer 7, and collecting waveforms through a waveform collecting module;
s4, repeating the steps S1-S3 to finish waveform sampling of a plurality of detection points and a plurality of hammering points;
and step four, starting the clamping motor 23 to enable the clamping plate 18 to be separated from the pile foundation, so as to realize device disassembly.
Compared with the traditional manual operation mode, the sampling efficiency and the sampling accuracy are greatly improved.
Embodiment 2:
Fig. 10-13 show a building pile foundation detection device, on the basis of embodiment 1, a wave sensor 5 is rotatably connected with an electric telescopic rod 31 through a rotating rod 30, a sliding rod 32 perpendicular to the rotating rod 30 is fixedly connected with the rotating rod 30, and a spiral groove 1405 for sliding the sliding rod 32 is formed in a vertical cavity 1403.
Specifically, after the couplant is injected into the conical cavity 1404, the electric telescopic rod 31 drives the waveform sensor 5 to move downwards through the rotating rod 30, and in the process of moving downwards, the sliding rod 32 slides in the spiral groove 1405, so that the rotating rod 30 drives the waveform sensor 5 to rotate, and further the waveform sensor 5 drives the couplant to rotate downwards when in contact with the top surface of the pile foundation, so that the couplant is uniformly paved on the top surface of the pile foundation, and the paving effect is further improved; in addition, after the sampling of a check point is completed, the electric telescopic rod 31 drives the waveform sensor 5 to move upwards through the rotating rod 30 to separate from the couplant, and the waveform sensor 5 rotates upwards, so that the waveform sensor 5 centrifugally rotates to separate from the waste couplant adhered on the top surface of the pile foundation, the separation effect is improved, excessive adhesion between dust wrapped by the waste couplant and the waveform sensor 5 is avoided, the next couplant injection paving effect is improved, and the detection accuracy is further improved.
When the waveform sensor 5 rotates downwards to spread the couplant, the electric telescopic rod 31 moves downwards slowly, so that the spreading effect is improved; when the waveform sensor 5 rotates upwards to separate the couplant, the electric telescopic rod 31 moves upwards faster, so that the separation effect is improved.
Referring to fig. 11-12, the sliding rod 32 is nested in the spiral groove 1405, the end of the sliding rod 32 nested in the spiral groove 1405 is hemispherical, and the spiral groove 1405 is a groove with a vertical spiral shape and a semicircular cross section.
Specifically, the slide rod 32 is made to slide smoothly in the spiral groove 1405.
The present application is not limited to the above-described embodiments, which are adopted in connection with the actual demands, and various changes made by the person skilled in the art without departing from the spirit of the present application are still within the scope of the present application.