Construction method for integrated bunched pipe roofing capable of removing obstacles and jacking obstacles

Abstract

The invention relates to the technical field of tunnel construction, in particular to a construction method of an integrated bundled pipe curtain capable of removing and jacking obstacles at obstacles. The method specifically comprises the following steps that a circular jacking pipe and a square obstacle removing pipe joint are provided, and the square obstacle removing pipe joint is installed at the rear end of the circular jacking pipe; tunneling is carried out at the position of an existing obstacle through the circular jacking pipe, and the square obstacle removing pipe joint is driven to gradually approach the design position; after the square obstacle removing pipe joint reaches a designed position, jacking the square standard pipe joint; and the two adjacent square obstacle removing pipe joints and the square standard pipe joints are fixedly connected. The obstacle clearing and jacking integrated device has the beneficial effects that the round jacking pipe is arranged at the front end of the square obstacle clearing pipe joint, so that the round jacking pipe can cut the existing obstacle, meanwhile, the round jacking pipe drives the square obstacle clearing pipe joint to gradually approach to the designed position in the tunneling process, and thus obstacle clearing and jacking integration is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, and in particular to a construction method of a bundled pipe curtain capable of integrated obstacle clearing and jacking at an obstacle. Background Art

[0002] At present, a new type of dark excavation technology has emerged for the excavation of new lines under existing stations - the bundled pipe curtain method. The bundled pipe curtain technology has the following advantages: the node line does not need to be deepened during design, and the pipe curtain can be constructed close to the existing station floor; it is highly operable and does not depend on the formation conditions, and can be constructed in any formation; the soil inside the pipe curtain can be excavated in a single chamber at one time, greatly increasing the construction speed.

[0003] However, during the excavation of new lines, various underground obstacles left in the ground by existing stations, such as pull-out piles, are often encountered. Generally, these underground obstacles are mainly reinforced concrete structures. When the bundled pipe curtain technology is used for construction, the bundled pipe curtain pipe sections are box-shaped, with poor cutting force and difficult to clear. Usually, circular jacking pipes are used for pre-cutting and clearing obstacles. After the clearance is completed, grouting or backfilling is performed to ensure the stability of the structure below the existing station, and then the bundled pipe curtain construction is carried out. Such a cumbersome and complicated clearance method increases the construction period and the project cost; if manual clearance is used, it is difficult to ensure the safety of personnel and the project.

[0004] Therefore, this patent provides a construction method for a bundled pipe curtain that can clear obstacles and push in an integrated manner. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a construction method of a bundled pipe curtain that can clear obstacles and push in an integrated manner, so as to solve the problem that the existing bundled pipe curtain process is relatively cumbersome and complicated, which increases the construction period and the project cost.

[0006] The present invention also provides a construction method for a bundled pipe curtain that can be integrated with obstacle clearing and jacking at obstacles, which specifically includes the following steps: providing a circular jacking pipe and a square obstacle clearing pipe segment, and installing the square obstacle clearing pipe segment to the rear end of the circular jacking pipe; excavating at the location of the existing obstacle through the circular jacking pipe, and driving the square obstacle clearing pipe segment to gradually approach the designed position; after the square obstacle clearing pipe segment reaches the designed position, jacking the square standard pipe segment; and fixing the two adjacent square obstacle clearing pipe segments and the square standard pipe segment to be connected.

[0007] Furthermore, before the circular jacking pipe is excavated, a first filling material and a second filling material are provided, the first filling material is fixed to the upper and lower sides of the square obstacle removal pipe section, and the second filling material is fixed to the left and right sides of the square obstacle removal pipe section.

[0008] Furthermore, after the square obstacle removal pipe segment and the square standard pipe segment are laid out, the second filling material on the left and right sides of the square obstacle removal pipe segment is removed, and concrete is poured in the square obstacle removal pipe segment, the square standard pipe segment and the gap between the two.

[0009] Furthermore, before the concrete is poured, a corrugated pipe and a prestressed bundle are provided, the corrugated pipe is passed through a plurality of the square obstacle clearance pipe sections and the square standard pipe sections, and the prestressed bundle is placed in the corrugated pipe; after the strength of the concrete reaches the design strength, the prestressed bundle is tensioned, and after the tensioning is completed, the prestressed bundle is fixed.

[0010] Furthermore, after the prestressed bundle is fixed, the first filling material on the inner side of the square obstacle-clearing pipe segment is removed, and the inner side of the bundled pipe curtain is excavated.

[0011] Furthermore, before the square standard pipe section is laid out, a water stop lock buckle is installed on one side of the top of the square standard pipe section, and the other end of the water stop lock buckle is covered on the corresponding square standard pipe section.

[0012] The present invention also provides a bundled pipe curtain that can be integrated with obstacle clearing and jacking at obstacles, including: a circular jacking pipe used to cut existing obstacles at the designed position of the bundled pipe curtain; a square obstacle-clearing pipe segment located at the rear end of the circular jacking pipe; and square standard pipe segments arranged at the remaining designed positions of the bundled pipe curtain, wherein two adjacent square standard pipe segments and the square obstacle-clearing pipe segment are fixedly connected.

[0013] Furthermore, it also includes a first filling material and a second filling material arranged around the square obstacle clearance pipe segment, the first filling material is located on the upper and lower sides of the square obstacle clearance pipe segment, and the second filling material is located on the left and right sides of the square obstacle clearance pipe segment; the outer surfaces of the two first filling materials and the two second filling materials are arc-shaped and fit with the inner wall of the cavity cut out by the circular top pipe.

[0014] Furthermore, it also includes filling concrete in the square obstacle removal pipe section and the square standard pipe section and the gap between them, and the concrete is filled after the second filling materials are removed.

[0015] Furthermore, it also includes a corrugated pipe and a prestressed bundle, the corrugated pipe passes through a plurality of the square obstacle clearance pipe sections and the square standard pipe sections, the prestressed bundle is located in the corrugated pipe, and the corrugated pipe is buried in the concrete.

[0016] Furthermore, it also includes a water-stop lock buckle fixedly arranged on one side of the top of the square standard pipe section, and the other end of the water-stop lock buckle covers the top of the corresponding square standard pipe section.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By arranging a circular jacking pipe at the front end of the square obstacle clearing pipe section, the circular jacking pipe can cut the existing obstacles. At the same time, the circular jacking pipe drives the square obstacle clearing pipe section to gradually approach the designed position during the excavation process, thereby realizing the integration of obstacle clearing and jacking.

[0019] The present invention can save the construction process of grouting after the obstacle clearance is completed, simplify the construction process, and does not affect the internal structure construction. While ensuring the smooth jacking of the bundled pipe curtain, it greatly increases the safety and effectiveness of engineering obstacle clearance, so that obstacle clearance and bundled pipe curtain jacking are completed in an integrated manner, which greatly increases the construction speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a cross-sectional view of the overall structure of the bundled pipe curtain that can clear obstacles and push in an integrated manner at obstacles.

[0021] Figure 2 It is a partial structural cross-sectional view of the bundled pipe curtain of the present invention which can clear obstacles and push in an integrated manner.

[0022] Figure 3 The figure is a schematic diagram of the lock of the bundled pipe curtain which can clear obstacles and push in an integrated manner at obstacles according to the present invention.

[0023] Legend: 1. Existing obstacles; 2. Square obstacle-clearing pipe section; 3. Standard pipe section; 4. Prestressed tendons; 5. First filling material; 6. Second filling material; 7. Locking mechanism; 8. Water-stop lock; 9. Connecting piece; 10. Round jacking pipe; 11. Cutter disc. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] See also Figure 1The present invention provides a construction method for a bundled pipe curtain that can integrate obstacle clearing and jacking at obstacles, which solves the problem that the existing bundled pipe curtain process is relatively cumbersome and complicated, which increases the construction period and the project cost. By arranging a circular jacking pipe at the front end of the square obstacle clearing pipe section, the circular jacking pipe can cut the existing obstacle, and at the same time, the circular jacking pipe drives the square obstacle clearing pipe section to gradually approach the designed position during the excavation process, thereby realizing the integration of obstacle clearing and jacking. The present invention can eliminate the construction process of grouting after obstacle clearing is completed, simplify the construction process, and does not affect the construction of the internal structure. While ensuring the smooth jacking of the bundled pipe curtain, it greatly increases the safety and effectiveness of engineering obstacle clearing, so that obstacle clearing and bundled pipe curtain jacking are completed in an integrated manner, which greatly increases the construction speed.

[0026] The following is a description of a construction method of a bundled pipe curtain capable of clearing obstacles and jacking at obstacles according to the present invention in conjunction with the accompanying drawings.

[0027] See also Figure 1 , showing the overall structural cross-sectional view of the bundled pipe curtain of the present invention that can clear obstacles and push in an integrated manner. Figure 2 , showing a partial structural cross-sectional view of the bundled pipe curtain of the present invention that can clear obstacles and push into the obstacle. Figure 1 and Figure 2 , a construction method of a bundled pipe curtain capable of clearing obstacles and jacking at obstacles according to the present invention is described.

[0028] like Figure 1 and Figure 2 As shown, the construction method of a bundled pipe curtain that can integrate obstacle clearing and jacking at obstacles of the present invention specifically includes the following steps: detecting an existing obstacle 1 at the designed position of the bundled pipe curtain; excavating the position of the existing obstacle 1 through the circular jacking pipe 10, and driving the square obstacle clearing pipe segment 2 to gradually approach the designed position; after the square obstacle clearing pipe segment 2 reaches the designed position, the circular jacking pipe 10 stops excavating and arranges the square standard pipe segment 3 at the designed position; and fixing two adjacent square obstacle clearing pipe segments 2 and the square standard pipe segment 3 to be connected.

[0029] In a specific implementation, when laying out the square standard pipe section 3, a pipe jacking machine is provided so that the pipe jacking machine pushes the square standard pipe section 3 to dig into the soil layer.

[0030] In a specific embodiment, before the circular jacking pipe 10 is excavated, a first filling material 5 and a second filling material 6 are provided, the first filling material 5 is fixed to the upper and lower sides of the square obstacle clearing pipe section 2, and the second filling material 6 is fixed to the left and right sides of the square obstacle clearing pipe section 2.

[0031] In a specific embodiment, after the square obstacle removal pipe segment 2 and the square standard pipe segment 3 are laid out, the second filling material 6 on the left and right sides of the square obstacle removal pipe segment 2 is removed, and concrete is poured in the square obstacle removal pipe segment 2 and the square standard pipe segment 3 and in the gap between the two.

[0032] In a specific embodiment, before the concrete is poured, a corrugated pipe and a prestressed bundle 4 are provided, the corrugated pipe is passed through a plurality of the square obstacle clearance pipe sections 2 and the square standard pipe sections 3, and the prestressed bundle 4 is placed in the corrugated pipe; after the strength of the concrete reaches the design strength, the prestressed bundle 4 is tensioned, and after the tensioning is completed, the prestressed bundle 4 is fixed.

[0033] In a specific implementation, after the prestressed bundle 4 is fixed, the first filling material 5 inside the square obstacle-clearing pipe segment 2 is removed, and the inside of the bundled pipe curtain is excavated.

[0034] In a specific embodiment, before the square standard pipe section 3 is laid out, a water stop lock buckle 8 is installed on one side of the top of the square standard pipe section 3 , and the other end of the water stop lock buckle 8 covers the corresponding square standard pipe section 3 .

[0035] The present invention also provides a bundled pipe curtain that can integrate obstacle removal and jacking at obstacles, comprising: a circular jacking pipe 10 for cutting an existing obstacle 1 at the designed position of the bundled pipe curtain; a square obstacle removal pipe segment 2 located at the rear end of the circular jacking pipe 10; and square standard pipe segments 3 arranged at the remaining designed positions of the bundled pipe curtain, wherein two adjacent square standard pipe segments 3 and the square obstacle removal pipe segments 2 are fixedly connected. By arranging the circular jacking pipe 10 at the front end of the square obstacle removal pipe segment 2, the circular jacking pipe 10 can cut the existing obstacle 1, and at the same time, the circular jacking pipe 10 drives the square obstacle removal pipe segment 2 to gradually approach the designed position during the excavation process, thereby realizing the integration of obstacle removal and jacking.

[0036] In a specific embodiment, a cutter head 11 is rotatably provided at the front end of the annular jacking pipe 10 .

[0037] In a specific embodiment, both sides of the square obstacle removal pipe section 2 and the square standard pipe section 3 are symmetrically provided with locking mechanisms 7, and the locking mechanisms 7 are arranged along the entire length of the square standard pipe section 3. The locking mechanisms 7 on the two adjacent square obstacle removal pipe sections 2 and the square standard pipe sections 3 cooperate with each other. Through the mutual cooperation of the locking mechanisms 7, the bundled pipe curtain structure can be initially fixed to ensure the stability of the overall structure.

[0038] In a specific embodiment, it also includes a first filling material 5 and a second filling material 6 arranged around the square obstacle removal pipe segment 2, the first filling material 5 is located on the upper and lower sides of the square obstacle removal pipe segment 2, and the second filling material 6 is located on the left and right sides of the square obstacle removal pipe segment 2; the outer surfaces of the two first filling materials 5 and the two second filling materials 6 are arc-shaped and fit with the inner wall of the cavity cut out by the circular top pipe 10.

[0039] In a specific embodiment, a connecting piece 9 for fixing the first filling material 5 is provided on the square obstacle removal pipe segment 2 , and the connecting piece 9 passes through the first filling material 5 and the square obstacle removal pipe segment 2 .

[0040] Specifically, the connecting member 9 is a bolt.

[0041] In a specific embodiment, it also includes concrete filled in the square obstacle removal pipe section 2 and the square standard pipe section 3 and the gap therebetween, and the concrete is filled after the second filling materials 6 are removed.

[0042] In a specific embodiment, it also includes a corrugated pipe and a prestressed bundle 4. The corrugated pipe runs through a plurality of the square obstacle clearing pipe sections 2 and the square standard pipe sections 3. The prestressed bundle 4 is located inside the corrugated pipe, and the corrugated pipe is buried in the concrete. When the concrete to be poured reaches the designed strength, the prestressed bundle 4 is tensioned. After the tensioning is completed, the two ends of the prestressed bundle 4 are fixed.

[0043] In a specific embodiment, it also includes a water stop lock buckle 8 fixedly mounted on one side of the top of the square standard pipe section 3, and the other end of the water stop lock buckle 8 covers the top of the corresponding square standard pipe section 3. By providing the water stop lock buckle 8, it is possible to prevent the water in the soil layer from entering the square standard pipe section 3 and the gap on the side during the excavation of the square standard pipe section 3.

[0044] The following is a detailed description of the construction process of the bundled pipe curtain capable of clearing obstacles and jacking at obstacles according to the present invention.

[0045] The existing obstacle 1 at the design position of the bundled pipe curtain is detected in advance by retrieving information and detecting. If the existing obstacle 1 is buried on the excavation route, the square obstacle clearing pipe segment 2 is used, and a circular jacking pipe 10 is set at the front end of the square obstacle clearing pipe segment 2 to achieve the purpose of cutting the existing obstacle 1.

[0046] The circular jacking pipe 10 is excavated into the soil layer, driving the rear square obstacle removal pipe section 2 to gradually approach the designed position. At the same time, the outer surfaces of the first filling material 5 and the second filling material 6 are in contact with the inner wall of the cavity cut out by the circular jacking pipe 10, thereby preventing the soil layer from collapsing. After the square obstacle removal pipe section 2 reaches the designed position, the circular jacking pipe 10 stops excavating.

[0047] Then the remaining square standard pipe sections 3 are laid out, and a pipe jacking machine is used to push the square standard pipe sections 3. Before pushing, the locking mechanism 7 at the end of the square obstacle removal pipe section 2 needs to be matched with the locking mechanism 7 at the end of the square standard pipe section 3. When the square standard pipe section 3 reaches the designed position, the pipe jacking machine is closed.

[0048] A corrugated pipe is passed through the square obstacle-clearing pipe section 2 and the square standard pipe section 3, and a prestressed bundle 4 is passed through the corrugated pipe.

[0049] The second filling material 6 on both sides of the square obstacle removal pipe segment 2 is removed, and the inside of the square obstacle removal pipe segment 2 and the square standard pipe segment 3 and the gap therebetween are filled with concrete.

[0050] When the concrete strength reaches the design strength, the prestressed tendon 4 is tensioned, and after the tensioning is completed, the two ends of the prestressed tendon 4 are fixed.

[0051] The inner sides of the square obstacle removal pipe section 2 and the square standard pipe section 3 are excavated. Before the excavation, the first filling material 5 inside the square obstacle removal pipe section 2 is removed.

[0052] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A construction method for a bundled pipe curtain capable of clearing obstacles and jacking at obstacles, characterized in that: The specific steps include: Providing a circular jacking pipe (10) and a square obstacle-clearing pipe section (2), and installing the square obstacle-clearing pipe section (2) to the rear end of the circular jacking pipe (10); Excavation is performed at the location of the existing obstacle (1) through a circular jacking pipe (10), and the square obstacle removal pipe section (2) is driven to gradually approach the designed position; After the square obstacle-clearing pipe section (2) reaches the designed position, the square standard pipe section (3) is pushed forward; The two adjacent square obstacle-clearing pipe sections (2) and the square standard pipe section (3) are fixedly connected.

2. The construction method of a bundled pipe-roof capable of clearing obstacles and jacking at obstacles according to claim 1, characterized in that: Before the circular jacking pipe (10) is excavated, a first filling material (5) and a second filling material (6) are provided, and the first filling material (5) is fixed to the upper and lower sides of the square obstacle removal pipe section (2), and the second filling material (6) is fixed to the left and right sides of the square obstacle removal pipe section (2).

3. The construction method of a bundled pipe-roof capable of clearing obstacles and jacking at obstacles according to claim 2, characterized in that: After the square obstacle removal pipe section (2) and the square standard pipe section (3) are laid out, the second filling material (6) on the left and right sides of the square obstacle removal pipe section (2) is removed, and concrete is poured inside the square obstacle removal pipe section (2), inside the square standard pipe section (3) and in the gap between the two.

4. The construction method of a bundled pipe-roof capable of integrated obstacle removal and jacking according to claim 3, characterized in that: Before the concrete is poured, a corrugated pipe and a prestressed bundle (4) are provided, the corrugated pipe is passed through a plurality of the square obstacle-clearing pipe sections (2) and the square standard pipe sections (3), and the prestressed bundle (4) is placed in the corrugated pipe; After the strength of the concrete reaches the designed strength, the prestressed tendon (4) is tensioned, and after the tensioning is completed, the prestressed tendon (4) is fixed.

5. The construction method of a bundled pipe-roof capable of clearing obstacles and jacking at obstacles according to claim 4, characterized in that: After the prestressed bundle (4) is fixed, the first filling material (5) inside the square obstacle-clearing pipe segment (2) is removed, and the inside of the bundled pipe curtain is excavated.

6. The construction method of a bundled pipe-roof capable of clearing obstacles and jacking at obstacles according to claim 1, characterized in that: Before the square standard pipe section (3) is laid out, a water stop lock buckle (8) is installed on one side of the top of the square standard pipe section (3), and the other end of the water stop lock buckle (8) is covered on the corresponding square standard pipe section (3).

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