CN101463924B - Heavy caliber pipe-jacking butt joint technique - Google Patents

Abstract

The invention relates to a large-diameter jacking pipe butting process. The process comprises the following steps: reconstructing large-diameter jacking pipe tool pipe by improving soil mass of a butting area; performing plugging construction of the butting area by air pressure; and finishing butting of the large-diameter jacking pipes. The process can satisfy the requirement for large-diameter pipe jacking construction in a restricted area such as a traffic main artery, a bottleneck position of a regional junction or an area in which pipelines can not be avoided, and satisfy the requirement of shortening a long-distance pipe jacking construction period. The large-diameter jacking pipe butting process produces hardly any effect on road traffic, surrounding pipelines, lives of people, and has good social benefit. The large-diameter jacking pipe butting process can realize a plurality of impossible things in the process of underground pipeline construction, and has the advantages of low engineering cost, low risk and wide market prospect.

Description

Heavy caliber pipe-jacking butt joint technology

Technical field

The present invention relates to a kind of under ground piping jacking pipe construction process, especially a kind of heavy caliber pipe-jacking engineering that is used for can solve jacking construction and the push pipe butt joint construction process of use in the long-distance pipe jacking engineering under complicated or the restricted condition.

Background technique

Along with the extensive utilization of under ground piping, make the underground complicated pipeline traffic that formed at aspects such as traffic, the energy, environmental improvement, electric power transportation, municipal drainages.Therefore when implementing new pipework, especially in areas such as traffic main artery, regional hinges, underground utility complexity, buried depth differ, and construction has brought difficulty to heavy caliber pipe-jacking, many bottlenecks position does not even possess execution conditions, makes pipeline construction face the problem of underground butt joint.

On the other hand, trans-regional, city even transnational long-distance pipe engineering continue to bring out, and the increase of duct length makes engineering risk, also constantly rises at double, and the duration increases etc., and these factors have also limited the development of long-distance pipe jacking.

Summary of the invention

The present invention will solve the heavy caliber pipe-jacking construction in areas such as traffic main artery, regional hinges, and underground utility complexity, buried depth differ needs the technical problem of butt joint, and a kind of heavy caliber pipe-jacking butt joint technology is provided.

The technological scheme that the present invention solves the problems of the technologies described above is:

Heavy caliber pipe-jacking butt joint technology, its step is as follows:

1, the regional soil body of improvement butt joint

A kind of method that adopts deep layer to stir in dress, high-pressure rotary jet grouting pile, the freezing improves docking the regional soil body; Its improvement zone length is determined with the tool pipe leading portion+cutterhead width+butt joint gap of rectifying a deviation; Improvement regional depth and width should be done to extend up and down with segment length before the tool pipe with top power range of scatter value;

2, transform the push pipe tool pipe

When carrying out the heavy caliber pipe-jacking butt joint, two tool pipes are done the transformation of the demand of adaptation push pipe butt joint:

A. the transformation of tool pipe

1) increases filling system

The shrouding place sets up injected hole outside push pipe tool pipe cutterhead front portion, Tu Cang, Tu Cang, makes the slurries can be by injected hole to push pipe the place ahead, spray on every side;

2) remove the cutterhead front cone

3) set up steel plate behind the cutter

At the tool pipe head plate that a plurality of length are 50cm is set, when tool pipe arrived docking location, the set plate of two tool pipes extend out to another tool pipe and contacts, and played the effect of retaining soil, prevented occurrence of large-area landslide and seepage when butt joint;

B. the transformation of tool pipe inside before the butt joint:

With equipment complete removal in the tool pipe, and the big bearing of removal tool pipe, as serious leakage is arranged in demolishing process, sealing is carried out carrying out operation again behind the grouting and reinforcing to the native storehouse soil body immediately; The cutting plastron is removed the soil body in the native storehouse, and is fixed cutterhead outer and instrument shell, uses the gap between arc round steel shutoff cutterhead and the frame, and with steel plate cutterhead sealed;

3, docking area air pressure shutoff construction

Cabin in two butt joint push pipe tool pipes is provided with shrouding as an air pressure storehouse at the tool pipe tail, makes to form an airtight pressure work environment in two tool pipes, carry out full air pressure shutoff construction;

(1) air pressure construction process:

A. closed conduct is installed a full airlock;

B. pipeline and transfer chamber are detected, just can carry out next step construction after meeting the demands;

C. be replaced with the sealed cover of band injected hole at following soil outlet cover plate of air pressure, under normal pressure, inert slurry injected in the tool head front portion then;

D. under air pressure, open be unearthed hole and manhole, with obstacle in device clears such as electric hammer, pulley, the high pressure water gun soil storehouse;

E. soil excavation in the native from top to bottom storehouse, and in time weld shutoff with steel plate;

(2) air pressure shutoff construction

After slurries solidify, cutting off the tool pipe plastron observes, as do not have infiltration, continue cutting operation, otherwise reinforce with δ=20 gussets, in tool pipe, outwards carry out slip casting, determining do not have to go out work surface clearly under the seepage situation, seal two tool pipe gaps with δ 6 steel plates after, again plastron in the 2# tool pipe and cutterhead vertically hung scroll are cut off, press fixed two tool pipes of circumference five equilibrium with δ=8 of 25 steel plates at last;

4, push pipe joint tube coupling is made

After two tool pipe faggings, baffle plate disposed, two tool pipes connected in aggregates with δ=6mm steel plate, build steel concrete at the tool pipe inwall then, or adopt and spray concrete, make the tool pipe internal diameter consistent, guarantee that pipeline is straight, play preservative efficacy simultaneously with sewage concrete pipe internal diameter.

The invention has the beneficial effects as follows:, finish the heavy caliber pipe-jacking butt joint by transforming heavy caliber pipe-jacking tool pipe, the improvement docking area soil body and docking area air pressure shutoff construction.The requirement of heavy caliber pipe-jacking construction is carried out in the restricted areas such as zone that the present invention not only can satisfy on the traffic main artery, regional hinge bottleneck position or underground existence can not be dodged pipeline, and can satisfy the requirement of shortening the long-distance pipe jacking construction period.In the heavy caliber pipe-jacking docking operation,, has good social benefit to the almost not influence of road traffic, peripheral pipeline, people's lives.The present invention can make many can not coming true in the underground pipeline construction process, and the cost and the risk of engineering are low, have vast market prospect.

Description of drawings

Fig. 1, the 2nd, docking area soil body improvement area schematic;

Fig. 3 is two tool pipe schematic representation;

Fig. 4 is that the outer shrouding place of push pipe tool pipe cutterhead front portion, Tu Cang, Tu Cang sets up the injected hole schematic representation;

Fig. 5 sets up the steel plate schematic representation after the tool pipe head is removed cutterhead front cone and cutter;

Fig. 6 is the view after the 1# tool pipe is handled.

Embodiment

Below in conjunction with specific embodiment, further set forth patent of the present invention.Should be understood that these embodiments only to be used to the written or printed documents patent of invention is described and be not used in the restriction patent of the present invention scope.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read patent instruction of the present invention, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Heavy caliber pipe-jacking butt joint technology of the present invention, its step is as follows:

1, the regional soil body improvement of butt joint (Fig. 1,2)

For guaranteeing that push pipe docks smoothly, should limit to some extent two push pipe tool pipe positions, prevent that tool pipe from producing unnecessary Side movement in docking operation, simultaneously for guaranteeing the stagnant water effect in butt joint zone, be necessary the soil body that docks the zone is improved.

The measure of improvement mainly contains deep layer and stirs dress, high-pressure rotary jet grouting pile, freezing etc.

The improvement zone length is determined with the tool pipe leading portion+cutterhead width+butt joint gap of rectifying a deviation.

Improvement regional depth and width should be done to extend up and down with segment length before the tool pipe with top power range of scatter value.

2, the transformation of push pipe tool pipe (Fig. 3)

When carrying out the heavy caliber pipe-jacking butt joint, two instruments are made corresponding transformation fully, so that adapt to the demand of push pipe butt joint.(1# tool pipe and 2# tool pipe)

A. the transformation of tool pipe

Tool pipe is newly-increased following function on original pipe jacking equipment:

(1) filling system (Fig. 4)

The shrouding place sets up injectedhole 9 outside push pipe tool pipe cutterhead front portion, Tu Cang, Tu Cang; make slurries by slip casting, improve the intensity of soil by injected hole to push pipe the place ahead, injection on every side to surrounding soil; increase the butt joint safety of construction, protection surrounding enviroment and pipeline etc.

(2) remove cutterhead front cone (Fig. 5)

The Security in the butt joint construction is improved, so removal tool pipe cutterhead the place aheadcone cutterhead 10 in the slit of two tool pipes when reducing to dock.

(3) set up steel plate (Fig. 5) behind the cutter

At the tool pipe head someplates 11 are set, the about 50cm of length, when tool pipe arrived docking location, the set plate of two tool pipes extend out to another tool pipe and contacts, and played the effect of retaining soil, prevented occurrence of large-area landslide and seepage when butt joint.

B. the transformation (Fig. 6) of tool pipe inside before the butt joint:

With equipment complete removal in the tool pipe (tool pipe correction jack is not temporarily torn open), and the big bearing of removal tool pipe, as serious leakage is arranged in demolishing process, sealing is carried out carrying out operation again behind the grouting and reinforcing to the native storehouse soil body 8 immediately; Cutting plastron 2 is removed the soil body in the native storehouse 3, and is fixed cutterhead outer 6 and tool pipe shell 1, uses the gap between arc round steel 5 shutoff cutterhead limbs 7 and the shell 1, and with steel plate cutterhead sealed.

3, docking area air pressure shutoff construction

Can provide a stable working surface for ensureing in the shutoff process, reduce construction risk, decision utilizes two interior cabins of butt joint push pipe tool pipes as an air pressure storehouse, at the tool pipe tail shrouding is set, make to form an airtight pressure work environment in two tool pipes, carry out full air pressure shutoff construction.

(1) air pressure construction process

A. closed conduct is installed a full airlock.

B. pipeline and transfer chamber are detected, just can carry out next step construction after meeting the demands.

C. be replaced with the sealed cover of band injected hole at following soil outlet cover plate of air pressure, under normal pressure, inert slurry injected in the tool head front portion then.

D. under air pressure, open be unearthed hole and manhole, with obstacle in device clears such as electric hammer, pulley, the high pressure water gun soil storehouse.

E. soil excavation in the native from top to bottom storehouse, and in time weld shutoff with steel plate.

(2) air pressure shutoff construction

After slurries solidify, cutting off tool pipe plastron 2 observes, as do not have infiltration, continue cutting operation, otherwise reinforce with δ=20 gussets 4, in tool pipe, outwards carry out slip casting, determining do not have to go out work surface clearly under the seepage situation, seal two tool pipe gaps with δ 6 steel plates after, again plastron 2 in the 2# tool pipe and cutterhead vertically hung scroll are cut off, press fixed two tool pipes of circumference five equilibrium with δ=8 of 25 steel plates at last.4, push pipe joint tube coupling is made

After two tool pipe faggings, baffle plate disposed, two tool pipes connected in aggregates with δ=6mm steel plate, build steel concrete at the tool pipe inwall then, or adopt and spray concrete, make the tool pipe internal diameter consistent, guarantee that pipeline is straight, play preservative efficacy simultaneously with sewage concrete pipe internal diameter.

Claims (1)

1. heavy caliber pipe-jacking butt joint technology is characterized in that concrete steps are as follows:

One. the regional soil body of improvement butt joint

A kind of method that adopts deep layer to stir in dress, high-pressure rotary jet grouting pile, the freezing improves docking the regional soil body; Its improvement zone length is determined with the tool pipe leading portion+cutterhead width+butt joint gap of rectifying a deviation; Improvement regional depth and width should be done to extend up and down with segment length before the tool pipe with top power range of scatter value;

Two. transform the push pipe tool pipe

When carrying out the heavy caliber pipe-jacking butt joint, two tool pipes of 1#, 2# are done the transformation of the demand of adaptation push pipe butt joint:

A. the transformation of tool pipe

1) increases filling system

The shrouding place sets up injected hole outside push pipe tool pipe cutterhead front portion, Tu Cang, Tu Cang, makes the slurries can be by injected hole to push pipe the place ahead, spray on every side;

2) remove the cutterhead front cone

3) set up steel plate behind the cutter

At the tool pipe head plate that a plurality of length are 50cm is set, when tool pipe arrived docking location, the set plate of two tool pipes extend out to another tool pipe and contacts, and played the effect of retaining soil, prevented occurrence of large-area landslide and seepage when butt joint;

B. the transformation of tool pipe inside before the butt joint:

Except that tool pipe correction jack is not temporarily torn open, with miscellaneous equipment complete removal in the 1# tool pipe, and the big bearing of removal tool pipe, as serious leakage is arranged in demolishing process, sealing is carried out carrying out operation again behind the grouting and reinforcing to the native storehouse soil body immediately; The cutting plastron is removed the soil body in the native storehouse, and is fixed cutterhead outer and instrument shell, uses the gap between arc round steel shutoff cutterhead and the frame, and with steel plate cutterhead sealed;

Three. docking area air pressure shutoff construction

Cabin in two butt joint push pipe tool pipes is provided with shrouding as an air pressure storehouse at the tool pipe tail, makes to form an airtight pressure work environment in two tool pipes, carry out full air pressure shutoff construction;

1) air pressure construction process:

A. closed conduct is installed a full airlock;

B. pipeline and transfer chamber are detected, just can carry out next step construction after meeting the demands;

C. be replaced with the sealed cover of band injected hole at following soil outlet cover plate of air pressure, under normal pressure, inert slurry injected in the tool head front portion then;

D. under air pressure, open be unearthed hole and manhole, with obstacle in electric hammer, pulley, the high pressure water gun device clear soil storehouse;

E. soil excavation in the native from top to bottom storehouse, and in time weld shutoff with steel plate;

2) air pressure shutoff construction

After slurries solidify, cutting off the tool pipe plastron observes, as do not have infiltration, continue cutting operation, otherwise reinforce with δ=20mm gusset, in tool pipe, outwards carry out slip casting, determining do not have to go out work surface clearly under the seepage situation, seal two tool pipe gaps with δ=6mm steel plate after, again plastron in the 2# tool pipe and cutterhead vertically hung scroll are cut off, press fixed two tool pipes of circumference five equilibrium with δ=8 of 25mm steel plates at last;

Four. push pipe joint tube coupling is made

After two tool pipe faggings, baffle plate disposed, two tool pipes connected in aggregates with δ=6mm steel plate, build steel concrete at the tool pipe inwall then, or adopt and spray concrete, make the tool pipe internal diameter consistent, guarantee that pipeline is straight, play preservative efficacy simultaneously with sewage concrete pipe internal diameter.

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