CN111335919A - Prefabricated pipe joint pushing method - Google Patents
Prefabricated pipe joint pushing method Download PDFInfo
- Publication number
- CN111335919A CN111335919A CN202010202448.7A CN202010202448A CN111335919A CN 111335919 A CN111335919 A CN 111335919A CN 202010202448 A CN202010202448 A CN 202010202448A CN 111335919 A CN111335919 A CN 111335919A
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- China
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- pipe
- jacking
- prefabricated
- prefabricated pipe
- joint
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
Abstract
The invention belongs to the technical field of construction, and particularly discloses a prefabricated pipe joint pushing method which comprises the following steps: (1) preparing a prefabricated pipe section: manufacturing a prefabricated pipe section at a place except a tunnel construction place; (2) building a counterforce wall; constructing a counterforce wall in front of a tunnel construction position; (3) preparing a pipe jacking machine: transporting the push bench between the reaction wall and the tunnel opening, and enabling one end of the push bench to abut against the reaction wall; (4) transporting the prefabricated pipe sections: transporting the prefabricated pipe joint manufactured in the step (1) to a construction tunnel; (5) adjusting the position of the prefabricated pipe joint: adjusting the position of the prefabricated pipe joint between a pipe jacking machine and a tunnel portal, and enabling one end of the pipe jacking machine to be abutted against the prefabricated pipe joint; (6) pushing in the prefabricated pipe section: and starting the pipe jacking machine, pushing the prefabricated pipe joint into the tunnel, and completing pushing of the prefabricated pipe joint. The method for pushing the prefabricated pipe sections is simple to operate and convenient to construct.
Description
Technical Field
The invention relates to the technical field of construction, in particular to a prefabricated pipe joint pushing method.
Background
With the development of economy and the improvement of comprehensive strength of China, the strength of foundation construction is gradually increased in recent years, and high-speed rails, highways, bridges and the like are constructed at a rapid speed. However, China is a country with multiple mountains and multiple hills, and in the process of infrastructure construction, when mountain lands or hills are encountered, the smooth progress of the infrastructure construction is usually ensured by a form of digging tunnels. At present, in the tunnel construction process, prefabricated pipe joints are paved in a tunnel to achieve the effects of supporting the tunnel and preventing water. The prefabricated pipe sections are arranged to form an integral structure, the assembly structure waterproof system between the adjacent prefabricated pipe sections is very important for the integral structure, the prefabricated pipe sections are attached tightly to form a good waterproof effect, and water leakage between structural members is avoided. At present, for the laying of the prefabricated pipe sections, the prefabricated pipe sections are usually pushed into a tunnel by using the pushing force generated by a pipe jacking machine. However, the pushing force generated by the existing push bench is 800 to 1000 tons, but the force of the prefabricated pipe joint in the construction process needs to be over ten thousand tons, namely the existing prefabricated pipe pushing method is difficult to meet the construction requirement.
Disclosure of Invention
The invention aims to provide a prefabricated pipe joint pushing method which is simple to operate and convenient to construct.
In order to achieve the above purpose, the basic scheme of the invention is as follows: the prefabricated pipe joint pushing method comprises the following steps:
(1) preparing a prefabricated pipe section: manufacturing a prefabricated pipe section at a place except a tunnel construction place;
(2) building a counterforce wall; constructing a counterforce wall in front of a tunnel construction position;
(3) preparing a pipe jacking machine: transporting the push bench between the reaction wall and the tunnel opening, and enabling one end of the push bench to abut against the reaction wall;
(4) transporting the prefabricated pipe sections: transporting the prefabricated pipe joint manufactured in the step (1) to a construction tunnel;
(5) adjusting the position of the prefabricated pipe joint: adjusting the position of the prefabricated pipe joint between a pipe jacking machine and a tunnel portal, and enabling one end of the pipe jacking machine to be abutted against the prefabricated pipe joint;
(6) pushing in the prefabricated pipe section: and starting the pipe jacking machine, pushing the prefabricated pipe joint into the tunnel, and completing pushing of the prefabricated pipe joint.
The basic scheme has the following working principle and beneficial effects: in this scheme, in the tunnel work progress, at the prefabricated tube coupling in other places earlier, can not exert an influence to the excavation in tunnel, can guarantee the construction progress, after tunnel excavation work is accomplished, build the counterforce wall in tunnel entrance to a cave department, the counterforce wall offsets with the one end of push bench, provides reverse effort for the push bench for the power that the push bench produced can reach 10000 more tons, and this power is enough to push away prefabricated tube coupling top in the tunnel, and easy operation is convenient.
Further, in the step (3), the contact surface of the push bench and the reaction wall is a horizontal plane. The contact surface of the reaction wall and the pipe pushing jack requires to be horizontal, so that the prefabricated pipe joint can be pushed horizontally.
Furthermore, the prefabricated pipe joint is provided with four connecting walls, the bottom wall is horizontally arranged, and the side walls at two sides are vertical to the bottom wall; the prefabricated pipe joint top wall is the arc, and the lateral edge is equipped with the radius angle. Compare and establish the prefabricated tube coupling into the structure that the cross section is the rectangle, can make the stress that the prefabricated tube coupling received comparatively disperse, improve its support strength.
Furthermore, prefabricated tube coupling includes A type push pipe tube coupling and B type push pipe tube coupling, and A type push pipe tube coupling and B type push pipe tube coupling all are equipped with the grout hole, and the position of the grout hole of A type push pipe tube coupling and B type push pipe tube coupling is different. The prefabricated tube coupling adopts two kinds of models, can be when pouring the position difference of grout hole and tunnel contact, the area of contact of increase thick liquid and tunnel improves support and water-proof effects.
Furthermore, the A-type jacking pipe joints and the B-type jacking pipe joints in the prefabricated pipe joints are sequentially and alternately connected, and the A-type jacking pipe joints are first prefabricated pipe joints. The A-type jacking pipe joint and the B-type jacking pipe joint are sequentially and alternately connected, so that the staggered subsections of the positions where the A-type jacking pipe joint and the B-type jacking pipe joint are in contact can be realized, the diffusion range of slurry is larger when pouring is carried out, the coverage effect is better, the force received by the jacking pipes is more dispersed, and the prefabricated pipe joints are prevented from being damaged due to stress concentration.
Further, in the step (6), the step (6) is divided into three stages, namely an initial stage, an intermediate stage and a receiving stage, and the pushing speeds of the three stages are different. The pushing can be carried out at different stages at different pushing speeds according to specific construction requirements, so that the construction quality is ensured, and the construction speed is increased.
Furthermore, the A-type jacking pipe joint and the B-type jacking pipe joint both comprise hoisting holes. Because the prefabricated pipe joints are heavy in weight and large in volume. In the step (4), when the A-type jacking pipe joint and the B-type jacking pipe joint are transported to the tunnel portal, the A-type jacking pipe joint and the B-type jacking pipe joint can be hoisted by the hoisting hole, so that the transportation is convenient.
Further, in the step (3), the distance from one end of the push bench far away from the reaction wall to the tunnel portal is 0.8-1.1 m. The inventor finds that when the distance between the push bench and the tunnel portal is 0.8-1.1m through multiple tests, the push bench can guarantee the push force of the push bench on the prefabricated pipe joint, the distance between the prefabricated pipe joint and the tunnel portal can be reduced as much as possible, and the useless work done by the push bench is reduced.
Further, four connecting walls of the prefabricated pipe joint are provided with hoisting holes, and the distance between the hoisting holes on the left side and the right side is smaller than the distance between the hoisting holes on the upper side and the lower side. Therefore, when the prefabricated pipe sections are transversely hoisted, the stress borne by the prefabricated pipe sections can be dispersed, and the instability caused by the stress concentration of the prefabricated pipe sections can be avoided.
Further, the propelling speed of the starting stage is less than or equal to 10 mm/min; the propelling speed of the propelling stage is 10-2010 mm/min; the advance of the receiving stage is less than or equal to 10 mm/min. The inventor finds that the construction is carried out at different stages by adopting the propelling speed through a plurality of tests, so that the construction quality is ensured, and the construction speed is improved.
The transverse direction in the scheme refers to a direction parallel to the horizontal plane.
Drawings
FIG. 1 is a front view of an A-type pipe-jacking pipe joint in a second embodiment of the prefabricated pipe joint pushing method of the present invention;
FIG. 2 is a side view of a prefabricated pipe section of type A according to a second embodiment of the prefabricated pipe section pushing method of the present invention;
FIG. 3 is a side view of a B-type prefabricated pipe joint in an embodiment of the prefabricated pipe joint pushing method of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: hoisting hole 1, slip casting hole 2, bolt hole 3.
Example one
The prefabricated pipe joint pushing method comprises the following steps:
(1) preparing a prefabricated pipe section: manufacturing a prefabricated pipe section outside a construction site in the tunnel;
(2) building a counterforce wall; constructing a counterforce wall in front of a tunnel construction position;
(3) preparing a pipe jacking machine: and (4) transporting the push bench between the reaction wall and the tunnel opening, and enabling one end of the push bench to abut against the reaction wall. The distance from one end of the push bench far away from the reaction wall to the tunnel entrance is 0.8-1.1m, and in the embodiment, the distance is 1 m. The inventor finds that when the distance between the push bench and the tunnel portal is 1m, the push bench can guarantee the pushing force of the push bench on the prefabricated pipe joint, the distance between the prefabricated pipe joint and the tunnel portal can be reduced as much as possible, and the idle work done by the push bench is reduced.
(4) Transporting the prefabricated pipe sections: transporting the prefabricated pipe joint manufactured in the step (1) to a construction tunnel;
(5) adjusting the position of the prefabricated pipe joint: adjusting the position of the prefabricated pipe joint between a pipe jacking machine and a tunnel portal, and enabling one end of the pipe jacking machine to be abutted against the prefabricated pipe joint;
(6) pushing in the prefabricated pipe section: and starting the pipe jacking machine, pushing the prefabricated pipe joint into the tunnel, and completing pushing of the prefabricated pipe joint.
In the step (3), the number of the push bench in the initial stage is four, and the thrust of each push bench is 350 tons. The power source of the push bench is derived from a hydraulic oil pump station. In the intermediate stage, the number of push bench can be increased as required, and the number of push bench is even and symmetrical about the tunnel axis.
In the step (3), the contact surface of the push bench and the reaction wall is a horizontal plane. The reaction wall is concrete placement's reaction wall, and includes two mutually perpendicular's wall body, and the reaction wall is "L" type. The bottom of reaction wall is the level with the contact surface of push bench, and the contact surface of push bench tip and prefabricated tube coupling also is the level promptly, can guarantee like this that prefabricated tube coupling can push in horizontally.
The prefabricated pipe section is provided with four connecting walls, the bottom wall is horizontally arranged, and the side walls on two sides are vertical to the bottom wall; the prefabricated pipe joint top wall is the arc, and the lateral edge is equipped with the radius angle. Compare and establish the prefabricated tube coupling into the structure that the cross section is the rectangle, can make the stress that the prefabricated tube coupling received comparatively disperse, improve its support strength.
In the step (6), the process is divided into three stages, namely an initial stage, an intermediate stage and a receiving stage, and the pushing speeds of the three stages are different. Specifically, the propelling speed in the starting stage is less than or equal to 10 mm/min; the propelling speed in the propelling stage is 10-2010 mm/min; the advancing speed in the receiving stage is less than or equal to 10 mm/min. The pushing can be carried out at different stages at different pushing speeds according to specific construction requirements, so that the construction quality is ensured, and the construction speed is increased.
In this scheme, in the tunnel work progress, at the prefabricated tube coupling in other places earlier, can not exert an influence to the excavation in tunnel, can guarantee the construction progress, after tunnel excavation work is accomplished, build the counterforce wall in tunnel entrance to a cave department, the counterforce wall offsets with the one end of push bench, provides reverse effort for the push bench for the power that the push bench produced can reach 10000 more tons, and this power is enough to push away prefabricated tube coupling top in the tunnel, and easy operation is convenient.
Example two
The difference between the present embodiment and the first embodiment is that, as shown in fig. 1-3, the prefabricated pipe joints include a type a pipe-jacking pipe joint and a type B pipe-jacking pipe joint; the A-type pipe jacking section comprises a hoisting hole 1 and a bolt hole 3; the B-type jacking pipe joint comprises a hoisting hole 1 and a bolt hole 3. The bolt hole is used for being matched with the connecting pin to connect two adjacent prefabricated pipe sections. The A-type jacking pipe joint and the B-type jacking pipe joint are provided with grouting holes, and the positions of the grouting holes of the A-type jacking pipe joint and the B-type jacking pipe joint are different. And the grouting hole is used for grouting after the prefabricated pipe joint pushing is finished. Four connecting walls of the prefabricated pipe joint are provided with hoisting holes 1, and the distance between the hoisting holes 1 on the left side and the right side is smaller than the distance between the hoisting holes 1 on the upper side and the lower side. Because the prefabricated pipe joints are heavy in weight and large in volume. In the step (4), when the A-type jacking pipe joint and the B-type jacking pipe joint are transported to the tunnel portal, the A-type jacking pipe joint and the B-type jacking pipe joint can be hoisted by using the hoisting holes 1, so that the transportation is convenient. Furthermore, when the prefabricated pipe sections are transversely hoisted, the distance between the hoisting holes in the left side wall and the right side wall is increased, so that the stress on the prefabricated pipe sections can be dispersed, and the instability caused by the stress concentration of the prefabricated pipe sections can be avoided.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. The prefabricated pipe joint pushing method is characterized by comprising the following steps: the method comprises the following steps:
(1) preparing a prefabricated pipe section: manufacturing a prefabricated pipe section at a place except a tunnel construction place;
(2) building a counterforce wall; constructing a counterforce wall in front of a tunnel construction position;
(3) preparing a pipe jacking machine: transporting the push bench between the reaction wall and the tunnel opening, and enabling one end of the push bench to abut against the reaction wall;
(4) transporting the prefabricated pipe sections: transporting the prefabricated pipe joint manufactured in the step (1) to a construction tunnel;
(5) adjusting the position of the prefabricated pipe joint: adjusting the position of the prefabricated pipe joint between a pipe jacking machine and a tunnel portal, and enabling one end of the pipe jacking machine to be abutted against the prefabricated pipe joint;
(6) pushing in the prefabricated pipe section: and starting the pipe jacking machine, pushing the prefabricated pipe joint into the tunnel, and completing pushing of the prefabricated pipe joint.
2. The precast pipe segment jacking method of claim 1, wherein: in the step (3), the contact surface of the push bench and the reaction wall is a horizontal plane.
3. The precast pipe segment jacking method of claim 2, wherein: the prefabricated pipe joint is provided with four connecting walls, the bottom wall is horizontally arranged, and the side walls on two sides are vertical to the bottom wall; the prefabricated pipe joint top wall is the arc, and the lateral edge is equipped with the radius angle.
4. The precast pipe segment jacking method of claim 3, wherein: the prefabricated pipe joint comprises an A-type pipe-jacking joint and a B-type pipe-jacking joint, the A-type pipe-jacking joint and the B-type pipe-jacking joint are both provided with grouting holes, and the positions of the grouting holes of the A-type pipe-jacking joint and the B-type pipe-jacking joint are different.
5. The precast pipe segment jacking method of claim 4, wherein: and the A-type jacking pipe joints and the B-type jacking pipe joints in the prefabricated pipe joints are sequentially and alternately connected.
6. The precast pipe segment jacking method of claim 5, wherein: in the step (6), the process is divided into three stages, namely an initial stage, a middle stage and a receiving stage, and the pushing speeds of the three stages are different.
7. The precast pipe segment jacking method of claim 6, wherein: the A-type jacking pipe joint and the B-type jacking pipe joint both comprise hoisting holes.
8. The precast pipe segment jacking method of claim 7, wherein: in the step (3), the distance from one end of the push bench far away from the counterforce wall to the tunnel entrance is 0.8-1.1 m.
9. The precast pipe segment jacking method of claim 8, wherein: four connecting walls of the prefabricated pipe joint are provided with the hoisting holes, and the distance between the hoisting holes on the left side and the right side is smaller than the distance between the hoisting holes on the upper side and the lower side.
10. The precast pipe segment jacking method of claim 9, wherein: the propelling speed of the starting stage is less than or equal to 10 mm/min; the propelling speed of the propelling stage is 10-2010 mm/min; the advance of the receiving stage is less than or equal to 10 mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202448.7A CN111335919A (en) | 2020-03-20 | 2020-03-20 | Prefabricated pipe joint pushing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202448.7A CN111335919A (en) | 2020-03-20 | 2020-03-20 | Prefabricated pipe joint pushing method |
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| CN111335919A true CN111335919A (en) | 2020-06-26 |
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| CN202010202448.7A Pending CN111335919A (en) | 2020-03-20 | 2020-03-20 | Prefabricated pipe joint pushing method |
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