A pipe jacking force distribution system for a pipe jacking launching well and a construction method thereof

Abstract

The present application relates to the technical field of underground engineering construction, specifically to a jacking starting shaft jacking force distribution system and its construction method. The system includes the outer wall of the basement, the building floor, the starting shaft and the distribution wall, which is intended to effectively distribute and transmit the thrust of the hydraulic jacking machine during the jacking construction to reduce the impact on the surrounding structures. The thrust is dispersed to the building floor through the distribution wall, reducing the risk of damage to the outer wall. The construction method includes the construction of the starting shaft enclosure, excavation and distribution wall construction to ensure the accuracy and stability of the structure and improve the force transmission effect. The present application realizes the effective transmission and dispersion of the thrust, reduces the risk of deformation of the outer wall, protects the safety of the building structure, and improves the construction efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of pipe jacking construction, and in particular to a pipe jacking force transmission and distribution system for a pipe jacking starting well and a construction method thereof. Background Art

[0002] During the construction of an underground passage, when there are obstacles such as roads, railways or buildings above the underground passage, pipe jacking construction will be used to reduce the impact of the underground passage construction on building facilities. Pipe jacking construction uses the thrust of a hydraulic pipe jacking machine to push sections of prefabricated pipes from the starting well to the receiving well, while digging and transporting away the soil on the front of the pipe to realize the underground passage concealed excavation construction.

[0003] At present, pipe jacking is used to construct underground extension passages of existing buildings. For example, two buildings are located on both sides of a road, and an underground passage is built between the two buildings, so that the basements of the two buildings are connected to each other, thus forming an underground passage. When pipe jacking is carried out, a starting well is set up next to one of the buildings, and a receiving well is set up next to the other building.

[0004] When pushing the pipe, the thrust is large, which can reach 3,000 tons. At this time, it is necessary to use the outer wall of the basement of the building, to act the hydraulic pipe jacking machine on the outer wall of the basement, and to set a diagonal bracing structure on the outer wall of the basement to ensure that the hydraulic pipe jacking machine has sufficient bearing capacity.

[0005] However, it is difficult to set up diagonal braces in a basement with a small space, and the construction is complicated. Even after the diagonal braces are installed in the basement, they need to be removed after the jacking construction is completed, which will undoubtedly increase the construction period and construction cost. In addition, during the operation of the hydraulic pipe jacking machine, the jacking force will react on the outer wall of the basement, causing deformation and cracking of the outer wall of the basement. Summary of the invention

[0006] The present application provides a jacking pipe force transmission distribution system for a jacking pipe starting shaft and a construction method thereof, which can effectively protect the basement structure of an existing building, ensure the stable progress of the jacking pipe construction, and effectively save construction period and construction cost.

[0007] In the first aspect, the present application provides a pipe jacking force distribution system for a pipe jacking starting well, which adopts the following technical solutions:

[0008] A jacking pipe starting shaft jacking pipe force transmission distribution system, comprising a building basement outer wall, a building floor, a starting shaft and a distribution wall; the starting shaft is located on one side of the building basement outer wall, the distribution wall is located in the starting shaft and is arranged opposite to the basement outer wall; the distribution wall extends to one side of the building floor in the horizontal direction and is connected to the building floor;

[0009] The hydraulic pipe jacking machine is arranged in the starting well and connected with the distribution wall, and the reaction force of the hydraulic pipe jacking machine during jacking acts horizontally on the building floor through the distribution wall.

[0010] By adopting the above technical solution, the hydraulic pipe jacking machine can be connected to the building floor through the distribution wall, and during hydraulic jacking, the reaction force of the hydraulic pipe jacking machine will act on the building floor. Since the building floor is arranged horizontally and is closely connected to the soil layer around the building, it can provide sufficient support for the pipe jacking machine. And since the reaction force of the hydraulic pipe jacking machine does not directly act on the outer wall of the basement, it can effectively ensure that the outer wall of the basement is not damaged, effectively protecting the structural integrity of the building.

[0011] Preferably, the distribution wall is located on a side of the starting well facing the outer wall of the basement of the building and is integrally arranged with the starting well, and the distribution wall also serves as a side wall of the starting well.

[0012] By adopting the above technical solution, the distribution wall serves as the inner wall of the starting well and is cast integrally with the starting well, which can effectively improve the integrity of the starting well and the distribution wall, enhance the mutual synergy between the two, and strengthen each other's stability.

[0013] Preferably, it also includes a load-bearing support, which is arranged inside the distribution wall and located on one side of the horizontal direction of the building floor, and an anchor point is arranged on the load-bearing support, and the anchor point is used to connect with the hydraulic pipe jacking machine.

[0014] By adopting the above technical solution, the hydraulic pipe jacking machine can directly transmit the reaction force it receives to the floor slab of the building through the load-bearing support, thereby improving the efficiency of force transmission, further improving the bearing capacity of the force distribution system, and ensuring uniform dispersion of the thrust.

[0015] Preferably, the load-bearing support is provided with an abutment portion, and the abutment portion is connected to the floor slab of the building.

[0016] By adopting the above technical solution, the load-bearing support can directly abut against the bottom plate of the building, so that the bottom plate of the building can directly support the hydraulic pipe jacking machine.

[0017] Preferably, the distribution wall is further provided with a steel section, the steel section is arranged vertically, the building floor is provided with multiple layers, and the steel section extends to one side of each layer of the building floor in the horizontal direction;

[0018] The load-bearing supports are provided in multiple groups and are arranged one by one corresponding to the floor slabs of the multi-story building; the load-bearing supports are fixedly connected to the steel sections.

[0019] By adopting the above technical solutions, the bearing capacity of the structure is further enhanced, ensuring the effective transmission of thrust between different floors.

[0020] Preferably, the distribution wall is further provided with a steel section, the steel section is arranged vertically, the building floor is provided with multiple layers, and the steel section extends to one side of each layer of the building floor in the horizontal direction;

[0021] The load-bearing supports are provided in multiple groups and are arranged one by one corresponding to the floor slabs of the multi-story building; the load-bearing supports are fixedly connected to the steel sections.

[0022] By adopting the above technical solution, the vertically arranged steel sections and the building floor slabs together form a solid support network, thereby providing sufficient support for the hydraulic pipe jacking machine and ensuring the normal progress of the pipe jacking construction.

[0023] Preferably, the connecting seat comprises a plurality of transversely arranged connecting frames, and the plurality of connecting frames are connected to a plurality of groups of load-bearing supports in a one-to-one correspondence.

[0024] By adopting the above technical solution, the connecting frame and the steel section are perpendicular, which can effectively improve the integrity of the steel section and the connecting seat in the distribution wall, further improve the bearing capacity of the distribution wall, thereby improving the bearing performance of the jacking force distribution system of the jacking starting well, and avoiding the reaction force of the jacking construction from causing damage to the building structure.

[0025] On the other hand, the present application provides a construction method for the pipe jacking force distribution system of the above-mentioned pipe jacking starting well, comprising the following steps:

[0026] Construction of the starting well enclosure; construction of concrete enclosure around the area to be excavated of the starting well;

[0027] The starting well is excavated by excavating the soil layer downward inside the concrete enclosure to form the starting well;

[0028] Distribution wall construction: pouring concrete distribution wall on the side of the starting shaft close to the outer wall of the building's basement, so that the distribution wall is located on one side of the building's floor in the horizontal direction and connected to the building's floor.

[0029] By adopting the above technical solution, it is possible to efficiently construct a jacking launch shaft and distribution wall that meet the design requirements, laying a solid foundation for subsequent underground passage construction.

[0030] In summary, the present invention includes at least one of the following beneficial technical effects:

[0031] 1. The present invention realizes the effective transmission and dispersion of the huge thrust of the hydraulic pipe jacking machine by setting up a distribution wall structure. This design avoids the thrust acting directly on the outer wall of the basement, significantly reduces the risk of deformation and cracking of the outer wall, and thus effectively protects the structural safety of the existing building;

[0032] 2. The preferred solution of the present invention adopts a force transmission structure composed of a load-bearing support and a steel section, which not only improves the bearing capacity of the system, but also simplifies the construction process, thereby improving construction efficiency and reducing engineering costs;

[0033] 3. By providing a connection base including multiple connection frames and correspondingly connecting with multiple groups of load-bearing supports, the present invention not only facilitates the installation and fixation of the hydraulic pipe jacking machine, but also facilitates the uniform transmission and dispersion of thrust. These design features jointly improve the overall performance and reliability of the force transmission and distribution system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the pipe jacking force distribution system of the pipe jacking starting well in the embodiment of the present application;

[0035] Markings in the attached drawings: 1. Exterior wall of the building basement; 2. Building floor; 21. Floor slab of the first floor above ground; 22. Floor slab of the first floor underground; 23. Basement foundation slab; 3. Starting shaft; 4. Distribution wall; 41. Steel section; 5. Load-bearing support; 51. Abutment; 52. Anchor point; 6. Connecting seat; 7. Hydraulic pipe jacking machine. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1 The present invention is described in further detail.

[0037] This embodiment discloses a jacking pipe force distribution system for a jacking pipe starting shaft 3, which is specifically used in the construction of an underground extension passage of an existing building. The underground extension passage horizontally extends from the basement of an existing building to the basement of another building, so that the basements of the two buildings are connected to form an underground passage.

[0038] In order to reduce the impact on existing facilities on the ground, the underground passage adopts jacking construction. A jacking starting well 3 is excavated on the horizontal side of the basement of an existing building, and a receiving well is excavated on one side of the basement of another building. The jacking construction is from the starting well 3 to the receiving well.

[0039] In the starting well 3, it is necessary to set up a hydraulic pipe jacking machine 7 and hoist the prefabricated concrete pipe, and then perform hydraulic jacking of the prefabricated pipe.

[0040] In order to ensure the smooth progress of hydraulic jacking, it is necessary to provide sufficient support for the hydraulic pipe jacking machine 7. Therefore, the present application uses the existing building structure and the starting well 3 as a support system, and provides a pipe jacking force distribution system for the starting well 3 of the pipe jacking.

[0041] Specifically, the jacking force distribution system of the jacking starting shaft 3 includes the building basement outer wall 1, the building floor 2, the starting shaft 3 and the distribution wall 4. The excavation of the starting shaft 3 is close to the basement outer wall, and the distribution wall 4 is located in the starting shaft 3 and is adjacent to and opposite to the basement outer wall. The building floor 2 is provided with multiple layers, specifically, the first floor slab 21 above ground, the first floor slab 22 underground, the second floor slab underground and the basement foundation slab 23. The distribution wall 4 extends from the first floor slab 21 above ground to the basement foundation slab 23, and the first floor slab 21 above ground, the first floor slab 22 underground, the second floor slab underground and the basement foundation slab 23 are all in contact with the distribution wall 4.

[0042] In the present application, the hydraulic pipe jacking machine 7 can be connected to the building floor 2 through the distribution wall 4, and during hydraulic jacking, the reaction force of the hydraulic pipe jacking machine 7 will act on the building floor 2. Since the building floor 2 is arranged horizontally and is closely connected to the soil layer around the building, sufficient support can be provided for the pipe jacking machine. And since the reaction force of the hydraulic pipe jacking machine 7 does not directly act on the outer wall of the basement, it can effectively ensure that the outer wall of the basement is not damaged, and effectively protect the structural integrity of the building.

[0043] In addition, after the pipe jacking construction is completed, there is no need to dismantle the distribution wall 4. It is only necessary to drill through the distribution wall 4 and the basement to continue the construction of the underground passage. Compared with the construction of the traditional basement outer wall diagonal bracing structure, it can effectively reduce the construction period and construction cost.

[0044] Furthermore, the distribution wall 4 serves as the inner wall of the starting well 3 and is cast integrally with the starting well 3, which can effectively improve the integrity of the starting well 3 and the distribution wall 4, enhance the mutual synergy between the two, and strengthen the stability of each other.

[0045] Furthermore, the embodiment of the present application also includes a load-bearing support 5. The load-bearing support 5 is pre-buried inside the distribution wall 4 and is located on one side of the building floor 2 in the horizontal direction. An abutment portion 51 is provided at one end of the load-bearing support 5, and the abutment portion 51 is tightly abutted against the building floor 2, and an anchor point 52 is provided at the other end, and the anchor point 52 extends to the inside of the starting well 3 and is used to connect with the hydraulic jacking machine 7, so that the reaction force received by the hydraulic jacking machine 7 can be transmitted to the building floor 2 through the load-bearing support 5.

[0046] There are multiple groups of load-bearing supports 5, each group of load-bearing supports 5 corresponds to a layer of building floor 2, and multiple groups of load-bearing supports 5 are force-connected to the hydraulic pipe jacking machine 7, so that each layer of building floor 2 can support the hydraulic pipe jacking machine 7.

[0047] In order to improve the bearing capacity of the distribution wall 4 and facilitate the fixation of the load-bearing support 5, a steel section 41 is further added inside the distribution wall 4 in this embodiment. The steel section 41 is arranged vertically and has the same height as the distribution wall 4. There are multiple steel sections 41 and they are distributed horizontally. The load-bearing support 5 is fixedly connected to the steel section 41, and can be bolted or welded. Therefore, the vertically arranged steel section 41 and the building floor 2 together form a solid support network, thereby providing sufficient support for the hydraulic pipe jacking machine 7 and ensuring the normal progress of the pipe jacking construction.

[0048] In order to more effectively connect the hydraulic pipe jacking machine 7 and the load-bearing support 5, the pipe jacking starting shaft 3 pipe jacking force distribution system also includes a connecting seat 6 arranged in the starting shaft 3, and the connecting seat 6 includes a plurality of connecting frames, each of which is arranged horizontally, and the connecting frame is located on one side of the horizontal direction of the building floor 2, and each connecting frame is connected to a group of load-bearing supports 5, and the connecting frame is bolted to the anchor point 52. Therefore, the connecting frame and the steel 41 are perpendicular to each other, which can effectively improve the integrity of the steel 41 and the connecting seat 6 in the distribution wall 4.

[0049] The hydraulic pipe jacking machine 7 is connected to the connecting frame and combined with the building floor 2 to form a powerful support system, which can effectively withstand and disperse the huge thrust of the hydraulic pipe jacking machine 7, further improving the safety and reliability of the construction process.

[0050] This embodiment also provides a construction method for the pipe jacking force distribution system of the aforementioned pipe jacking launching well 3, which specifically includes the following steps:

[0051] Construction of the enclosure of the starting shaft 3: pouring concrete enclosure structure around the area to be excavated of the starting shaft 3, and the enclosure structure adopts underground continuous wall.

[0052] The starting shaft 3 is excavated, and then the excavation work of the starting shaft 3 is carried out, that is, the soil layer is excavated inside the concrete enclosure to form the starting shaft 3.

[0053] During the construction of the distribution wall 4, concrete is poured on one side of the starting shaft 3 close to the outer wall 1 of the building's basement, and the concrete is integrated with the enclosure structure of the starting shaft 3 and serves as the distribution wall 4, while the distribution wall 4 is abutted against the floor slab of the building.

[0054] For the construction of the steel section 41 and the load-bearing support 5, the steel section 41 and the load-bearing support 5 can be assembled immediately, and then hoisted together into the starting shaft 3 and poured into the concrete structure.

[0055] Construction of the base plate of starting shaft 3; compaction and reinforcement of the bottom soil of starting shaft 3 and pouring of the concrete base plate are carried out in sequence.

[0056] After the pipe jacking construction is completed, it is only necessary to dismantle the connecting seat 6 and move it out of the starting well 3.

[0057] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pipe jacking force distribution system for a pipe jacking launching well (3), characterized in that: The invention comprises a building basement outer wall (1), a building floor (2), a starting shaft (3) and a distribution wall (4); the starting shaft (3) is located on one side of the building basement outer wall (1), the distribution wall (4) is located in the starting shaft (3) and is arranged opposite to the basement outer wall; the distribution wall (4) extends to one side of the building floor in the horizontal direction and is connected to the building floor (2); The hydraulic pipe jacking machine (7) is arranged in the launching well (3) and connected to the distribution wall (4), and the reaction force of the hydraulic pipe jacking machine (7) during jacking acts horizontally on the building floor (2) through the distribution wall (4); It also comprises a load-bearing support (5), the load-bearing support (5) being arranged inside the distribution wall (4) and located on one side of the building floor (2) in the horizontal direction, the load-bearing support (5) being provided with an anchor point (52), the anchor point (52) being used to be connected to a hydraulic pipe jacking machine (7), the load-bearing support (5) being provided with an abutment portion (51), the abutment portion (51) being connected to the building floor (2); A steel section (41) is also arranged inside the distribution wall (4), the steel section (41) is arranged vertically, the building floor (2) is arranged in multiple layers, and the steel section (41) extends to one side of each layer of the building floor (2) in the horizontal direction; The load-bearing supports (5) are provided in multiple groups and are arranged one-to-one with the floor slabs (2) of the multi-story building; the load-bearing supports (5) are fixedly connected to the steel sections (41); It also includes a connecting seat (6), the connecting seat (6) is arranged in the starting well (3) and is fixedly connected to the anchor point (52), the hydraulic pipe jacking machine (7) is fixedly connected to the connecting seat (6), the connecting seat (6) includes a plurality of transversely arranged connecting frames, and the plurality of connecting frames are connected to the plurality of groups of load-bearing supports (5) in a one-to-one correspondence.

2. The pipe jacking force distribution system of the pipe jacking launching well (3) according to claim 1, characterized in that: The distribution wall (4) is located on a side of the starting shaft (3) facing the outer wall (1) of the building basement and is arranged integrally with the starting shaft (3); the distribution wall (4) also serves as a side wall of the starting shaft (3).

3. A construction method for a pipe jacking force distribution system in a pipe jacking launching well (3) as claimed in any one of claims 1 to 2, characterized in that: The following steps are involved: Construction of the enclosure of the starting shaft (3); Construction of concrete enclosure around the area to be excavated of the starting shaft (3) Excavating the starting well (3), excavating the soil layer downward inside the concrete enclosure, thereby forming the starting well (3); The distribution wall (4) is constructed by pouring a concrete distribution wall (4) on the side of the starting shaft (3) close to the outer wall (1) of the building basement, so that the distribution wall (4) is located on one side of the building floor slab (2) in the horizontal direction and is connected to the building floor slab.

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