Assembly type reusable pipe jacking vertical shaft supporting frame

Abstract

The utility model discloses an assembly type reusable pipe-jacking vertical shaft support frame, which relates to the technical field of municipal engineering and comprises a hollow center piece, a plurality of connecting rod pieces mounted on the outer wall of the hollow center piece and a plurality of embedded connecting pieces embedded on the inner side wall of a pipe-jacking vertical shaft, the number of the connecting rod pieces is the same as that of the embedded connecting pieces, and the tail end of each connecting rod piece is connected with the corresponding embedded connecting piece. The assembly type reusable pipe-jacking vertical shaft supporting frame is reasonable in design, provides supporting for an ultra-deep foundation pit pipe-jacking vertical shaft, guarantees safety and stability of the foundation pit pipe-jacking vertical shaft, and prevents the phenomenon that when a reverse construction method is adopted for construction and earthwork is excavated, the foundation pit pipe-jacking vertical shaft is damaged. And the ultra-deep foundation pit vertical shaft is deformed, extruded and collapsed under the action of soil pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal engineering, and more specifically to the technical field of an assembled and reusable pipe jacking shaft support frame. Background Art

[0002] In municipal engineering projects, when open excavation is not possible or large-scale excavation is not required due to restrictions on the surrounding environment, pipe jacking is often required to solve the problem of laying pipelines and underground water supply and drainage pipes. This can minimize damage to the surrounding environment, speed up construction progress, and ensure construction safety.

[0003] However, when the surrounding environment requires deep or ultra-deep foundation pits for pipe jacking operations, the reverse construction method is used. The reverse construction method for pipe jacking working shafts has the advantages of low construction cost and high construction efficiency. The inner diameter of the pipe jacking working shaft reaches 8m-12m. How to ensure the stability and safety of the working shaft during the jacking process? When ultra-deep foundation pits do not use ring beams and support piles, how to ensure the safety of the vertical shaft, control the convergence and shrinkage deformation of the ultra-deep working shaft, and prevent the occurrence of collapse accidents have become problems that urgently need solutions. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems of how to ensure the safety of the shaft, control the convergence and shrinkage deformation of the ultra-deep working shaft, and prevent the occurrence of collapse accidents. The utility model provides an assembled and reusable jacking shaft support frame.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0006] The utility model provides an assembled and reusable pipe jacking shaft support frame, which includes a hollow center piece, a plurality of connecting rods installed on the outer wall of the hollow center piece, and a plurality of embedded connecting pieces embedded in the inner wall of the pipe jacking shaft. The number of the connecting rods is the same as the number of the embedded connecting pieces, and the end of each connecting rod is connected to the corresponding embedded connecting piece.

[0007] Specifically, because the site conditions in the jacking shaft are inconsistent, the temporary support frames involved in the ultra-deep jacking shaft are generally more than one layer. Therefore, the temporary support frames for the ultra-deep jacking shaft are arranged in layers according to the actual situation on site, and the length and thickness of the seamless steel pipes and angle steels of the support frames are selected according to actual needs.

[0008] This assembled and reusable jacking shaft support frame provides support for the ultra-deep foundation pit jacking shaft, ensuring the safety and stability of the foundation pit jacking shaft, and preventing the ultra-deep foundation pit shaft from being deformed, squeezed and collapsed under the action of soil pressure when excavating earth during the reverse construction method.

[0009] In one embodiment, the hollow center piece is an integrally formed circular ring piece, and a plurality of connecting rods are evenly distributed on the outer wall of the circular ring piece along the circumference by welding.

[0010] In one embodiment, the hollow center piece includes two arc-shaped steel inserts and two symmetrically arranged semi-arc-shaped hollow circular tubes, the openings of the two semi-arc-shaped hollow circular tubes are in contact with each other, the openings of the two semi-arc-shaped hollow circular tubes are connected by corresponding arc-shaped steel inserts, and are tightened by a detachable bolt assembly.

[0011] Specifically, the semi-arc-shaped hollow circular tube is an important component of the reusable jacking shaft support frame, which is located on the upper part of the assembled reusable jacking shaft support frame and provides an upper supporting foundation for the assembled reusable jacking shaft support frame.

[0012] In one embodiment, two arc-shaped steel inserts and two semi-arc-shaped hollow tubes constitute a detachable circular ring member, and a plurality of connecting rods are evenly distributed on the outer wall of the detachable circular ring member along the circumference by welding.

[0013] In one embodiment, the connecting rod includes a seamless steel pipe, a first channel steel oblique support and a second channel steel oblique support symmetrically arranged on the outer wall of the seamless steel pipe, and the free ends of the seamless steel pipe, the first channel steel oblique support and the second channel steel oblique support are all connected to the corresponding embedded connecting parts.

[0014] Specifically, the first channel steel inclined support is located on the left side of the seamless steel pipe, with one end welded to the first connecting steel plate and the other end welded to the seamless steel pipe. This provides a support base for the seamless steel pipe, ensuring the stability of the left side of the seamless steel pipe and preventing the seamless steel pipe from shifting, deforming, and losing its supporting function due to weak support under the soil pressure around the ultra-deep shaft.

[0015] The second channel steel inclined support is located on the right side of the seamless steel pipe. One end is welded to the first connecting steel plate, and the other end is also welded to the seamless steel pipe. This provides a second support base for the seamless steel pipe, ensuring the stability of the right side of the seamless steel pipe and preventing the seamless steel pipe from displacement, deformation, and loss of support due to weak support under the soil pressure around the ultra-deep shaft.

[0016] In one embodiment, each embedded connecting member includes an embedded connecting steel plate, a first connecting steel plate and a second connecting steel plate, all of which are embedded on the inner wall of the top pipe shaft, and the first connecting steel plate and the second connecting steel plate are symmetrically arranged on both sides of the embedded connecting steel plate.

[0017] Specifically, the embedded connecting steel plate is arc-shaped, typically square, with a thickness determined by actual needs. Four anchor bars, made from steel bars, surround the plate, securing it to the circular reinforced concrete sidewall. The embedded connecting steel plate is located at the end of the seamless steel pipe and is welded to the embedded connecting steel plate, effectively connecting and securing the seamless steel pipe to the jacking shaft.

[0018] The first connecting steel plate is an arc-shaped steel plate, and the thickness is selected according to actual needs. It provides a supporting basis for the first channel steel oblique support and distributes the load transferred by the first channel steel oblique support to the side wall of the jacking shaft.

[0019] The second connecting steel plate: an arc-shaped steel plate, the thickness of which is selected according to actual needs, provides a supporting basis for the second channel steel inclined support, and distributes the load transferred by the second channel steel inclined support to the side wall of the jacking shaft.

[0020] In one embodiment, the free end of the seamless steel pipe is connected to the embedded connecting steel plate, and the free ends of the first channel steel oblique support and the second channel steel oblique support are connected to the first connecting steel plate and the second connecting steel plate, respectively.

[0021] Specifically, seamless steel pipe: the circular hollow support frame body is made of high-strength steel pipe. At the same time, in order to improve the seamless steel pipe's resistance to extrusion and shear deformation, four equilateral angle steels are arranged around it and welded to the seamless steel pipe.

[0022] Generally speaking, seamless steel pipes can be made of steel pipes with a diameter of 500mm and a thickness of 12mm, and the surrounding angle steels can be welded with ∠140*12mm equal-leg angle steels.

[0023] The four ends of this seamless steel pipe are fixed to the embedded link steel plate, the first connecting steel plate and the second connecting steel plate by welding, thereby forming internal support strength to ensure the stability of the foundation pit.

[0024] In one embodiment, the first channel steel oblique support and the second channel steel oblique support of the same connecting rod are both provided with obliquely arranged counter-support rods, and the free end of each counter-support rod is connected to the corresponding embedded connecting steel plate.

[0025] Specifically, the counter-support rod is located between the first channel steel oblique support (or the second channel steel oblique support) and the embedded link steel plate, and is connected to the first channel steel oblique support (or the second channel steel oblique support) and the embedded link steel plate by welding. This counter-support rod can solve the problem of instability of a single channel steel oblique support when the span is large, and plays a reinforcing role.

[0026] In one embodiment, the number of the connecting rods is four.

[0027] In one embodiment, the number of pre-embedded connecting members is four, and they are matched one-to-one with corresponding connecting rods.

[0028] The beneficial effects of the utility model are as follows:

[0029] 1. The utility model has a reasonable design. Through this assembled and reusable jacking shaft support frame, the jacking shaft of the ultra-deep foundation pit is supported, ensuring the safety and stability of the foundation pit, preventing the jacking shaft of the ultra-deep foundation pit from being deformed, squeezed and collapsed under the action of soil pressure when excavating earth during the reverse construction method, thereby improving the safety and stability of the foundation pit.

[0030] 2. This highly reusable, assembled pipe jacking shaft support frame allows for vertical support of the foundation pit. Pipe alignment can be achieved through the center of the support without removing the horizontal support, ensuring excavation and material lifting. Furthermore, operations can be performed without disassembling the support frame, improving the stability and safety of the foundation pit pipe jacking shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 It is a structural diagram of an embodiment of the present utility model;

[0033] Figure 2 yes Figure 1 The structural diagram of the vertical shaft without the jacking pipe is shown in the figure;

[0034] Figure 3 It is a cross-sectional view of a multi-layer structure of the utility model installed in a jacking shaft;

[0035] Figure 4 It is a structural schematic diagram of another embodiment of the present utility model;

[0036] Figure 5 yes Figure 4 Exploded diagram;

[0037] Figure markings: 1-first channel steel oblique support, 2-second channel steel oblique support, 3-counter support rod, 4-embedded connecting steel plate, 5-first connecting steel plate, 6-second connecting steel plate, 7-seamless steel pipe, 8-top pipe shaft, 9-hollow center piece, 10-semi-arc hollow circular tube, 11-arc-shaped steel insert. DETAILED DESCRIPTION

[0038] To make the technical problems, technical solutions, and technical effects of the present invention more clear, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0041] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0042] Example 1

[0043] like Figures 1 to 5 As shown, this embodiment provides an assembled and reusable support frame for the jacking shaft 8, including a hollow center piece 9, a plurality of connecting rods installed on the outer wall of the hollow center piece 99, and a plurality of embedded connecting parts embedded in the inner wall of the jacking shaft 8. The number of the connecting rods is the same as the number of the embedded connecting parts, and the end of each connecting rod is connected to the corresponding embedded connecting part.

[0044] Specifically, because the on-site conditions in the jacking shaft 8 are inconsistent, the temporary support frames involved in the ultra-deep jacking shaft 8 are generally more than one layer. Therefore, the temporary support frames for the ultra-deep jacking shaft 8 are arranged in layers according to the actual situation on site, and the length and thickness of the seamless steel pipe 7 and angle steel of the support frame are selected according to actual needs.

[0045] This assembled and reusable jacking shaft 8 support frame is used to provide support for the ultra-deep foundation pit jacking shaft, ensuring the safety and stability of the foundation pit jacking shaft, and preventing the ultra-deep foundation pit shaft from being deformed, squeezed and collapsed under the action of soil pressure when excavating earth during the reverse construction method.

[0046] Example 2

[0047] like Figures 1 to 3 As shown, this embodiment provides an assembled and reusable support frame for the jacking shaft 8, including a hollow center piece 9, a plurality of connecting rods installed on the outer wall of the hollow center piece 99, and a plurality of embedded connecting parts embedded in the inner wall of the jacking shaft 8. The number of the connecting rods is the same as the number of the embedded connecting parts, and the end of each connecting rod is connected to the corresponding embedded connecting part.

[0048] The hollow center piece 9 is an integrally formed circular ring piece, and a plurality of connecting rods are evenly distributed on the outer wall of the circular ring piece along the circumference by welding.

[0049] Example 3

[0050] like Figures 4 to 5 As shown, this embodiment provides an assembled and reusable support frame for the jacking shaft 8, including a hollow center piece 9, a plurality of connecting rods installed on the outer wall of the hollow center piece 99, and a plurality of embedded connecting parts embedded in the inner wall of the jacking shaft 8. The number of the connecting rods is the same as the number of the embedded connecting parts, and the end of each connecting rod is connected to the corresponding embedded connecting part.

[0051] The hollow center piece 9 includes two arc-shaped steel inserts 11 and two symmetrically arranged semi-arc-shaped hollow circular tubes 10. The openings of the two semi-arc-shaped hollow circular tubes 10 are in contact with each other. The openings of the two semi-arc-shaped hollow circular tubes 10 are connected by corresponding arc-shaped steel inserts 11 and tightened by a detachable bolt assembly.

[0052] Specifically, the semi-arc-shaped hollow circular tube 10 is an important component of the reusable jacking shaft 8 support frame, which is located on the upper part of the assembled reusable jacking shaft 8 support frame, providing an upper supporting foundation for the assembled reusable jacking shaft 8 support frame.

[0053] Example 4

[0054] like Figures 4 to 5 As shown, this embodiment provides an assembled and reusable support frame for the jacking shaft 8, including a hollow center piece 9, a plurality of connecting rods installed on the outer wall of the hollow center piece 99, and a plurality of embedded connecting parts embedded in the inner wall of the jacking shaft 8. The number of the connecting rods is the same as the number of the embedded connecting parts, and the end of each connecting rod is connected to the corresponding embedded connecting part.

[0055] The hollow center piece 9 includes two arc-shaped steel inserts 11 and two symmetrically arranged semi-arc-shaped hollow circular tubes 10. The openings of the two semi-arc-shaped hollow circular tubes 10 are in contact with each other. The openings of the two semi-arc-shaped hollow circular tubes 10 are connected by corresponding arc-shaped steel inserts 11 and tightened by a detachable bolt assembly.

[0056] Specifically, the semi-arc-shaped hollow circular tube 10 is an important component of the reusable jacking shaft 8 support frame, which is located on the upper part of the assembled reusable jacking shaft 8 support frame, providing an upper supporting foundation for the assembled reusable jacking shaft 8 support frame.

[0057] Two arc-shaped steel inserts 11 and two semi-arc-shaped hollow tubes 10 constitute a detachable circular ring member, and a plurality of connecting rods are evenly distributed on the outer wall of the detachable circular ring member along the circumference by welding.

[0058] Example 5

[0059] This embodiment is based on the following optimizations of Embodiment 2 or 4, specifically:

[0060] The connecting rod includes a seamless steel pipe 7, a first channel steel oblique support 1 and a second channel steel oblique support 2 symmetrically arranged on the outer wall of the seamless steel pipe 7, and the free ends of the seamless steel pipe 7, the first channel steel oblique support 1 and the second channel steel oblique support 2 are all connected to the corresponding embedded connecting parts.

[0061] Specifically, the first channel steel inclined support 1 is located on the left-hand side of the seamless steel pipe 7, with one end welded to the first connecting steel plate 5 and the other end welded to the seamless steel pipe 7. This provides a support base for the seamless steel pipe 7, ensuring the support stability of the left-hand side of the seamless steel pipe 7 and preventing the seamless steel pipe 7 from being displaced or deformed due to weak support and losing its supporting function under the action of the soil pressure around the ultra-deep vertical shaft.

[0062] Example 6

[0063] This embodiment is based on the following optimizations of Embodiment 2 or 4, specifically:

[0064] The second channel steel inclined support 2 is located on the right side of the seamless steel pipe 7, with one end welded to the first connecting steel plate 5 and the other end welded to the seamless steel pipe 7. This provides a second support base for the seamless steel pipe 7, ensuring the support stability of the right side of the seamless steel pipe 7 and preventing the seamless steel pipe 7 from being displaced or deformed due to weak support and losing its supporting function under the action of the soil pressure around the ultra-deep vertical shaft.

[0065] Each embedded connection part includes an embedded connection steel plate, a first connection steel plate 5 and a second connection steel plate 6 embedded on the inner wall of the top pipe shaft 8. The first connection steel plate 5 and the second connection steel plate 6 are symmetrically arranged on both sides of the embedded connection steel plate.

[0066] Specifically, the pre-embedded connecting steel plate is arc-shaped, typically square, with a thickness selected based on actual needs. Four anchor bars, made from steel bars, surround the pre-embedded connecting steel plate, securing it to the circular reinforced concrete sidewall. The pre-embedded connecting steel plate is located at the end of the seamless steel pipe 7 and is welded to the pre-embedded connecting steel plate, effectively connecting and securing the seamless steel pipe 7 to the jacking shaft 8.

[0067] Example 7

[0068] This embodiment is based on the sixth embodiment and is optimized as follows:

[0069] The first connecting steel plate 5 is an arc-shaped steel plate, and the thickness is selected according to actual needs. It provides a support basis for the first channel steel inclined support 1 and distributes the load transferred by the first channel steel inclined support 1 to the side wall of the jacking shaft 8.

[0070] The second connecting steel plate 6 is an arc-shaped steel plate, the thickness of which is selected according to actual needs. It provides a supporting basis for the second channel steel inclined support 2 and distributes the load transferred by the second channel steel inclined support 2 to the side wall of the jacking shaft 8.

[0071] The free end of the seamless steel pipe 7 is connected to the embedded connecting steel plate, and the free ends of the first channel steel oblique support 1 and the second channel steel oblique support 2 are connected to the first connecting steel plate 5 and the second connecting steel plate 6 respectively.

[0072] Specifically, the seamless steel pipe 7 is a circular hollow support frame body made of high-strength steel pipe. At the same time, in order to improve the seamless steel pipe 7's resistance to extrusion and shear deformation, four equilateral angle steels are arranged around it and are welded to the seamless steel pipe 7 by welding.

[0073] Generally, the seamless steel pipe 7 can be made of a steel pipe with a diameter of 500 mm and a thickness of 12 mm, and the surrounding angle steels can be welded with ∠140*12 mm equal-leg angle steels.

[0074] The four ends of the seamless steel pipe 7 are fixed to the embedded link steel plate 4, the first connecting steel plate 5, and the second connecting steel plate 6 by welding, thereby forming an internal support force to ensure the stability of the foundation pit.

[0075] Example 8

[0076] This embodiment is based on the embodiment 6 or 7 and has the following optimizations, specifically:

[0077] The first channel steel oblique support 1 and the second channel steel oblique support 2 of the same connecting rod are both provided with an obliquely arranged counter-support rod 3, and the free end of each counter-support rod 3 is connected to the corresponding embedded connecting steel plate.

[0078] Specifically, the counter-support rod 3 is located between the first channel steel inclined support 1 (or the second channel steel inclined support 2) and the embedded link steel plate 4, and is connected to the first channel steel inclined support 1 (or the second channel steel inclined support 2) and the embedded link steel plate 4 by welding. This counter-support rod 3 improves the solution to the problem of instability of a single channel steel inclined support when the span is large, and plays a reinforcing role.

[0079] The number of connecting rods is four.

[0080] There are four pre-embedded connectors, which match the corresponding connecting rods one by one.

Claims

1. An assembled and reusable pipe jacking shaft support frame, characterized in that: The invention comprises a hollow center piece (9), a plurality of connecting rods installed on the outer wall of the hollow center piece (9), and a plurality of embedded connecting pieces embedded in the inner wall of the top pipe shaft (8), wherein the number of the connecting rods is the same as the number of the embedded connecting pieces, and the end of each connecting rod is connected to the corresponding embedded connecting piece.

2. The assembled and reusable pipe jacking shaft support frame according to claim 1, characterized in that: The hollow center piece (9) is an integrally formed circular ring piece, and a plurality of connecting rods are evenly distributed on the outer wall of the circular ring piece along a circumference by welding.

3. The assembled and reusable pipe jacking shaft support frame according to claim 1, characterized in that: The hollow center piece (9) comprises two arc-shaped steel inserts (11) and two symmetrically arranged semi-arc-shaped hollow circular tubes (10), the openings of the two semi-arc-shaped hollow circular tubes (10) are in contact with each other, and the openings of the two semi-arc-shaped hollow circular tubes (10) are sleeved by the corresponding arc-shaped steel inserts (11) and tightened by a detachable bolt assembly.

4. The assembled and reusable pipe jacking shaft support frame according to claim 3, characterized in that: The two arc-shaped steel inserts (11) and the two semi-arc-shaped hollow tubes (10) form a detachable circular ring component, and a plurality of connecting rods are evenly distributed on the outer wall of the detachable circular ring component along the circumference by welding.

5. The assembled and reusable pipe jacking shaft support frame according to claim 2 or 3, characterized in that: The connecting rod comprises a seamless steel pipe (7), a first channel steel oblique support (1) and a second channel steel oblique support (2) symmetrically arranged on the outer wall of the seamless steel pipe (7), and the free ends of the seamless steel pipe (7), the first channel steel oblique support (1) and the second channel steel oblique support (2) are all connected to the corresponding embedded connecting piece.

6. The assembled and reusable pipe jacking shaft support frame according to claim 5, characterized in that: Each of the embedded connecting parts comprises an embedded connecting steel plate, a first connecting steel plate (5) and a second connecting steel plate (6) all embedded on the inner side wall of the top pipe shaft (8), wherein the first connecting steel plate (5) and the second connecting steel plate (6) are symmetrically arranged on both sides of the embedded connecting steel plate.

7. The assembled and reusable pipe jacking shaft support frame according to claim 6, characterized in that: The free end of the seamless steel pipe (7) is connected to the embedded connecting steel plate, and the free ends of the first channel steel oblique support (1) and the second channel steel oblique support (2) are connected to the first connecting steel plate (5) and the second connecting steel plate (6), respectively.

8. The assembled and reusable pipe jacking shaft support frame according to claim 7, characterized in that: The first channel steel oblique support (1) and the second channel steel oblique support (2) of the same connecting rod are both provided with an obliquely arranged counter-support rod (3), and the free end of each counter-support rod (3) is connected to the corresponding embedded connecting steel plate.

9. The assembled and reusable pipe jacking shaft support frame according to claim 1, characterized in that: The number of the connecting rods is four.

10. The assembled and reusable pipe jacking shaft support frame according to claim 9, characterized in that: The number of the embedded connecting pieces is four, and they match the corresponding connecting rods one by one.

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