Construction method of integrated bundle pipe roof of obstacle clearing and jacking at obstacle

Abstract

The present application relates to the technical field of tunnel construction, in particular to a construction method of a bundled pipe roof capable of removing obstacles and jacking at obstacles. Specifically, the method comprises the following steps: providing a circular jacking pipe and a square obstacle-removing pipe section, installing the square obstacle-removing pipe section to the rear end of the circular jacking pipe; excavating through the circular jacking pipe at the position of the existing obstacle and gradually moving the square obstacle-removing pipe section to the design position; jacking the square standard pipe section after the square obstacle-removing pipe section reaches the design position; and fixedly connecting the adjacent square obstacle-removing pipe sections and the square standard pipe section. The beneficial effect is that the circular jacking pipe is provided at the front end of the square obstacle-removing pipe section, so that the circular jacking pipe can cut the existing obstacle, and the circular jacking pipe can gradually move the square obstacle-removing pipe section to the design position during excavation, thereby realizing the integration of obstacle removal and jacking.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tunnel construction, in particular to a construction method of a bundled pipe roof that can clear obstacles and jacking at obstacles. BACKGROUND

[0002] Currently, for the excavation working condition of newly-built lines under existing stations, a new type of underground excavation technology, the bundled pipe roof method, is used. For the bundled pipe roof technology, the following advantages exist: the node line design does not need to be deepened, the pipe roof can be constructed close to the existing station floor; it is highly operable and does not depend on the stratum conditions, and can be constructed in any stratum; the soil inside the pipe roof can be excavated in a single bin at one time, greatly increasing the construction speed.

[0003] However, during the excavation of newly-built lines, various underground obstacles left by existing stations, such as uplift piles, are often encountered. Generally, these underground obstacles are mainly reinforced concrete structures. When the bundled pipe roof technology is used for construction, because the bundled pipe roof pipe joint is box-shaped, the cutting force is poor, and it is difficult to clear obstacles. Usually, a circular pipe jacking is used to pre-cut and clear obstacles. After the obstacles are cleared, grouting or backfilling is performed to ensure the stability of the structure under the existing station, and then the bundled pipe roof construction is performed. This complicated and complex obstacle clearing method increases the construction period and increases the project cost. If manual obstacle clearing is used, it is difficult to ensure personnel and engineering safety.

[0004] Therefore, the present application provides a construction method of a bundled pipe roof that can clear obstacles and jacking at obstacles. SUMMARY

[0005] The present application aims to overcome the defects of the prior art and provide a construction method of a bundled pipe roof that can clear obstacles and jacking at obstacles, solving the problem of the complicated and complex existing bundled pipe roof technology, which increases the construction period and increases the project cost.

[0006] The present application also provides a construction method of a bundled pipe roof that can clear obstacles and jacking at obstacles, specifically including the following steps: providing a circular pipe jacking and a square obstacle clearing pipe joint, installing the square obstacle clearing pipe joint to the rear end of the circular pipe jacking, excavating through the circular pipe jacking at the position of the existing obstacle and gradually approaching the design position with the square obstacle clearing pipe joint, jacking the square standard pipe joint after the square obstacle clearing pipe joint reaches the design position, and fixedly connecting the adjacent two square obstacle clearing pipe joints and the square standard pipe joint.

[0007] Further, before the circular pipe jacking is excavated, a first filling material and a second filling material are provided, the first filling material is fixedly arranged on the upper and lower sides of the square obstacle clearing pipe joint, and the second filling material is fixedly arranged on the left and right sides of the square obstacle clearing pipe joint.

[0008] Further, after the square obstacle-removing pipe section and the square standard pipe section are arranged, the second filling material on the left and right sides of the square obstacle-removing pipe section is removed, and concrete is poured in the square obstacle-removing pipe section, the square standard pipe section and the gap between the two.

[0009] Further, before the concrete is poured, a bellows and a prestressed beam are provided, the bellows penetrates through a plurality of the square obstacle-removing pipe sections and the square standard pipe sections, and the prestressed beam is placed in the bellows; after the strength of the concrete reaches the design strength, the prestressed beam is tensioned, and after the tensioning is completed, the prestressed beam is fixed.

[0010] Further, after the prestressed beam is fixed, the first filling material inside the square obstacle-removing pipe section is removed, and the inside of the bundled pipe curtain is excavated.

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

[0012] The application also provides a bundled pipe curtain integrated with obstacle removal and jacking at obstacles, comprising: a circular jacking pipe for cutting existing obstacles at the design position of the bundled pipe curtain; a square obstacle-removing pipe section at the rear end of the circular jacking pipe; square standard pipe sections arranged at the rest of the design position of the bundled pipe curtain, and adjacent two square standard pipe sections and the square obstacle-removing pipe section are fixedly connected.

[0013] Further, it also comprises first filling material and second filling material arranged around the square obstacle-removing pipe section, the first filling material is located on the upper and lower sides of the square obstacle-removing pipe section, and the second filling material is located on the left and right sides of the square obstacle-removing pipe section; the outer surfaces of the two first filling materials and the two second filling materials are arc-shaped and fit the inner walls of the cavities cut by the circular jacking pipe.

[0014] Further, it also comprises concrete filled in the square obstacle-removing pipe section, the square standard pipe section and the gap between the two, and the concrete is filled after the two second filling materials are removed.

[0015] Further, it also comprises a bellows and a prestressed beam, the bellows penetrates through a plurality of the square obstacle-removing pipe sections and the square standard pipe sections, and the prestressed beam is located in the bellows, and the bellows is buried in the concrete.

[0016] Further, it also comprises a water stop lock fixed on one side of the top of the square standard pipe section, and the other end of the water stop lock is covered on the top of the corresponding square standard pipe section.

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

[0018] By setting the circular jacking pipe at the front end of the square obstacle-removing pipe section, the circular jacking pipe can cut the existing obstacle, and at the same time, the circular jacking pipe drives the square obstacle-removing pipe section to gradually approach the designed position during the tunneling process, thereby realizing the integration of obstacle removal and jacking.

[0019] The present application can save the construction process of grouting after obstacle removal, simplify the construction process, and also does not affect the internal structure construction, thereby ensuring the smooth jacking of the bundled pipe roof, greatly increasing the safety and effectiveness of the obstacle removal, and realizing the integration of obstacle removal and jacking of the bundled pipe roof, thereby greatly increasing the construction speed. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a sectional view of the overall structure of the bundled pipe roof for obstacle removal and jacking integration at the obstacle position.

[0021] Figure 2 It is a sectional view of the overall structure of the bundled pipe roof for obstacle removal and jacking integration at the obstacle position.

[0022] Figure 3 It is a schematic view of the lock catch of the bundled pipe roof for obstacle removal and jacking integration at the obstacle position.

[0023] Legend: 1, existing obstacle; 2, square obstacle-removing pipe section; 3, standard pipe section; 4, prestressed bundle; 5, first filling material; 6, second filling material; 7, lock catch mechanism; 8, water stop lock catch; 9, connecting piece; 10, circular jacking pipe; 11, cutter head. DETAILED DESCRIPTION

[0024] The present application will be further described below in combination with the drawings and specific embodiments.

[0025] Reference Figure 1The application provides a construction method of a bundled pipe curtain with integrated obstacle removal and jacking at an obstacle, which solves the problems of complicated process, increased construction period and project cost of the existing bundled pipe curtain process. The circular jacking pipe is arranged at the front end of the square obstacle removal pipe section, so that the circular jacking pipe can cut the existing obstacle, and the square obstacle removal pipe section is gradually moved to the design position during the jacking process, thereby realizing the integration of obstacle removal and jacking. The construction process of grouting after obstacle removal can be omitted, the construction process is simplified, the internal structure construction is not affected, the safety and effectiveness of the project obstacle removal are greatly improved, the obstacle removal and the bundled pipe curtain jacking are integrated, and the construction speed is greatly improved.

[0026] The construction method of the bundled pipe curtain with integrated obstacle removal and jacking at an obstacle will be described below with reference to the drawings.

[0027] Referring to Figure 1 , the overall structure sectional view of the bundled pipe curtain with integrated obstacle removal and jacking at an obstacle is shown. Referring to Figure 2 , the partial structure sectional view of the bundled pipe curtain with integrated obstacle removal and jacking at an obstacle is shown. The construction method of the bundled pipe curtain with integrated obstacle removal and jacking at an obstacle will be described below with reference to Figure 1 and Figure 2 .

[0028] As shown in Figure 1 and Figure 2 , the construction method of the bundled pipe curtain with integrated obstacle removal and jacking at an obstacle, specifically includes the following steps: detecting the existing obstacle 1 at the design position of the bundled pipe curtain; jacking through the circular jacking pipe 10 at the position of the existing obstacle 1 detected, and gradually moving the square obstacle removal pipe section 2 to the design position; after the square obstacle removal pipe section 2 reaches the design position, stopping jacking of the circular jacking pipe 10, and arranging the square standard pipe section 3 at the design position; fixedly connecting the square obstacle removal pipe section 2 and the square standard pipe section 3 adjacent to each other.

[0029] In a specific embodiment, when the square standard pipe section 3 is arranged, a jacking machine is provided, and the jacking machine jacks the square standard pipe section 3 to dig into the soil.

[0030] In a specific embodiment, before the circular jacking pipe 10 jacks, a first filling material 5 and a second filling material 6 are provided, the first filling material 5 is fixedly arranged on the upper and lower sides of the square obstacle removal pipe section 2, and the second filling material 6 is fixedly arranged on the left and right sides of the square obstacle removal pipe section 2.

[0031] In an embodiment, after the square obstacle-removing pipe section 2 and the square standard pipe section 3 are arranged, the second filling material 6 on the left and right sides of the square obstacle-removing pipe section 2 is removed, and concrete is poured in the square obstacle-removing pipe section 2, the square standard pipe section 3 and the gap between the two.

[0032] In an embodiment, before the concrete is poured, a bellows and a prestressed beam 4 are provided, the bellows is arranged through the square obstacle-removing pipe section 2 and the square standard pipe section 3, and the prestressed beam 4 is arranged in the bellows; after the strength of the concrete reaches the design strength, the prestressed beam 4 is tensioned, and the prestressed beam 4 is fixed after the tensioning is completed.

[0033] In an embodiment, after the prestressed beam 4 is fixed, the first filling material 5 inside the square obstacle-removing pipe section 2 is removed, and the inside of the bundled pipe curtain is excavated.

[0034] In an embodiment, before the square standard pipe section 3 is arranged, a water stop lock 8 is arranged on one side of the top of the square standard pipe section 3, and the other end of the water stop lock 8 is covered on the corresponding square standard pipe section 3.

[0035] The application also provides a bundled pipe curtain integrated with obstacle removal and jacking at an obstacle, comprising a circular jacking pipe 10 for cutting an existing obstacle 1 at a design position of the bundled pipe curtain, a square obstacle-removing pipe section 2 located at the rear end of the circular jacking pipe 10, and square standard pipe sections 3 arranged at the rest of the design positions of the bundled pipe curtain and fixedly connected between two adjacent square obstacle-removing pipe sections 2 and square standard pipe sections 3. The circular jacking pipe 10 is arranged at the front end of the square obstacle-removing pipe section 2, so that the circular jacking pipe 10 can cut the existing obstacle 1, and the circular jacking pipe 10 drives the square obstacle-removing pipe section 2 to gradually approach the design position during excavation, thereby realizing integration of obstacle removal and jacking.

[0036] In an embodiment, the front end of the circular jacking pipe 10 is rotatably provided with a cutter head 11.

[0037] In an embodiment, the square obstacle-removing pipe section 2 and the square standard pipe section 3 are symmetrically provided with a lock mechanism 7 on the top and bottom of the two sides, the lock mechanism 7 is arranged along the length of the square standard pipe section 3, and the lock mechanisms 7 on two adjacent square obstacle-removing pipe sections 2 and square standard pipe sections 3 are matched with each other. Through the mutual cooperation of the lock mechanisms 7, the bundled pipe curtain structure can be preliminarily fixed, and the stability of the overall structure is ensured.

[0038] In an embodiment, first filling materials 5 are arranged around the square obstacle-removing pipe section 2, and second filling materials 6 are arranged around the square obstacle-removing pipe section 2. The first filling materials 5 are arranged on the upper and lower sides of the square obstacle-removing pipe section 2, and the second filling materials 6 are arranged on the left and right sides of the square obstacle-removing pipe section 2. The outer surfaces of the first filling materials 5 and the second filling materials 6 are arc-shaped and are in close contact with the inner walls of the cavities cut by the circular pipe jacking pipe 10.

[0039] In an embodiment, the square obstacle-removing pipe section 2 is provided with connecting members 9 for fixing the first filling materials 5. The connecting members 9 pass through the first filling materials 5 and the square obstacle-removing pipe section 2.

[0040] Specifically, the connecting members 9 are bolts.

[0041] In an embodiment, concrete is filled in the square obstacle-removing pipe section 2, the square standard pipe section 3, and the gaps between the square obstacle-removing pipe section 2 and the square standard pipe section 3. After the second filling materials 6 are removed, the gaps are filled with concrete.

[0042] In an embodiment, a bellows and a prestressed beam 4 are arranged. The bellows pass through the square obstacle-removing pipe sections 2 and the square standard pipe sections 3. The prestressed beam 4 is arranged in the bellows, and the bellows is arranged in the concrete. When the concrete to be poured reaches the designed strength, the prestressed beam 4 is tensioned. After the tensioning is completed, the two ends of the prestressed beam 4 are fixed.

[0043] In an embodiment, a water stop lock 8 is arranged on one side of the top of the square standard pipe section 3. The other end of the water stop lock 8 covers the top of the corresponding square standard pipe section 3. The water stop lock 8 prevents water in the soil from entering the square standard pipe section 3 and the gaps on the side of the square standard pipe section 3 during tunneling.

[0044] The construction process of the obstacle-removing and pipe jacking integrated pipe curtain according to the present application is described below.

[0045] The existing obstacles 1 at the design position of the pipe curtain are detected in advance by searching for information and detecting. If the existing obstacles 1 are arranged on the tunneling route, the square obstacle-removing pipe section 2 is used, and the circular pipe jacking pipe 10 is arranged at the front end of the square obstacle-removing pipe section 2 to cut the existing obstacles 1.

[0046] The circular top pipe 10 excavates in the soil layer, and drives the square obstacle-removing pipe section 2 at the rear end to gradually approach the designed position. Meanwhile, the outer surfaces of the first filling material 5 and the second filling material 6 are in close contact with the inner walls of the cavity cut by the circular top pipe 10, so as to avoid soil collapse. After the square obstacle-removing pipe section 2 reaches the designed position, the circular top pipe 10 stops excavating.

[0047] Then the remaining square standard pipe sections 3 are laid out. Before pushing, the lock buckle mechanism 7 at the end of the square obstacle-removing pipe section 2 needs to be matched with the lock buckle mechanism 7 at the end of the square standard pipe section 3. After the square standard pipe section 3 reaches the designed position, the pipe jacking machine is closed.

[0048] Corrugated pipes are arranged in the square obstacle-removing pipe section 2 and the square standard pipe section 3, and prestressed beams 4 are arranged in the corrugated pipes.

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

[0050] When the strength of the concrete reaches the designed strength, the prestressed beams 4 are tensioned. After tensioning, the two ends of the prestressed beams 4 are fixed.

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

[0052] The above embodiments of the present application are described in detail in combination with the drawings, and those of ordinary skill in the art can make various changes to the present application according to the above description. Therefore, some details in the embodiments should not constitute a limitation on the present application, and the scope of protection of the present application is defined by the appended claims.

Claims

1. A construction method of an integrated cable pipe roof that can be cleared and jacked at an obstacle, characterized in that: Specifically comprising the following steps: Providing a round top pipe (10) and a square obstacle-removing pipe section (2), and installing the square obstacle-removing pipe section (2) to the rear end of the round top pipe (10); Excavating through the round top pipe (10) at the position of the existing obstacle (1) and driving the square obstacle-removing pipe section (2) to gradually approach the design position; After the square obstacle-removing pipe section (2) reaches the design position, jacking the square standard pipe section (3); Fixing and connecting the adjacent square obstacle-removing pipe section (2) and the square standard pipe section (3); Before the round top pipe (10) is excavated, providing a first filling material (5) and a second filling material (6), and fixing the first filling material (5) to the upper and lower sides of the square obstacle-removing pipe section (2), and fixing the second filling material (6) to the left and right sides of the square obstacle-removing pipe section (2) After the square obstacle-removing pipe section (2) and the square standard pipe section (3) are laid out, removing the second filling material (6) on the left and right sides of the square obstacle-removing pipe section (2), and pouring concrete in the square obstacle-removing pipe section (2), the square standard pipe section (3), and the gap between them.

2. The construction method of the integrated pile-up removing and jacking pipe roof at the obstacle according to claim 1, characterized in that: Before the concrete is poured, providing a bellows and a prestressed beam (4), and passing the bellows through the square obstacle-removing pipe section (2) and multiple square standard pipe sections (3), and placing the prestressed beam (4) in the bellows; After the strength of the concrete reaches the design strength, tensioning the prestressed beam (4), and fixing the prestressed beam (4) after tensioning is completed.

3. The construction method of the integrated pile-up removing and jacking pipe roof at the obstacle according to claim 2, characterized in that: After the prestressed beam (4) is fixed, removing the first filling material (5) on the inner side of the square obstacle-removing pipe section (2), and excavating the inner side of the bundled pipe curtain.

4. The construction method of the integrated pile-up removing and jacking pipe roof at the obstacle according to claim 1, characterized in that: Before the square standard pipe section (3) is laid out, installing a water stop lock (8) on one side of the top of the square standard pipe section (3), and covering the other end of the water stop lock (8) on the corresponding square standard pipe section (3).

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