Novel anti-corrosion pipe jacking structure

Abstract

The utility model discloses a novel anti-corrosion pipe jacking structure and relates to the technical field of pipe jacking, two ends of a concrete pipe are sleeved with metal covers, a plastic inner pipe is formed on the inner surface of the concrete pipe in an injection molding mode, two ends of the plastic inner pipe are located on the inner side surfaces of the metal covers, and a glass fiber reinforced plastic outer pipe is arranged on the outer surface of the concrete pipe. According to the novel jacking pipe, through the metal covers connected to the two ends of the concrete pipe in the sleeving mode, protection of the concrete pipe is enhanced through the metal covers connected to the two ends of the concrete pipe in the sleeving mode, and therefore protection of the end portions of the two ends of the jacking pipe during jacking displacement is improved, and the strength of the jacking pipe structure is improved; the plastic inner pipe and the glass fiber reinforced plastic outer pipe are arranged on the outer surface of the concrete pipe, so that the plastic inner pipe performs anti-corrosion protection on the inner surface of the concrete pipe, and the glass fiber reinforced plastic outer pipe performs anti-corrosion protection on the outer surface of the concrete pipe, thereby improving the anti-corrosion performance of the concrete pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking, in particular to a novel anti-corrosion pipe jacking structure. Background Art

[0002] Pipe jacking is a trenchless construction method, a technique for burying pipes with minimal or no excavation. Pipe jacking involves using the jacking force generated by jacking equipment within a working pit to overcome friction between the pipe and the surrounding soil, pushing the pipe into the soil according to the designed slope, and removing the soil. After one section of pipe is pushed into the soil, the second section is lowered and pushed forward. Using the thrust of the main jacking cylinder and other components such as the pipe and relay rooms, the tool pipe or tunnel boring machine is pushed from the working pit through the soil and hoisted into the receiving pit. The pipeline is then buried between the two pits, following the tool pipe or tunnel boring machine.

[0003] During the existing jacking construction, the ends of the jacking pipes are subjected to greater forces, and the outer surfaces of both ends of the jacking pipes are directly protected by external steel rings, which can easily cause the ends of the jacking pipes to break during construction. At the same time, the concrete on the inner and outer surfaces of the jacking pipes is exposed, which can easily cause corrosion on the inner and outer surfaces of the jacking pipes, resulting in water seepage and leakage after the jacking pipe construction. Summary of the Invention

[0004] The utility model provides a novel anti-corrosion jacking pipe structure to solve the problems of easy damage to the end and easy corrosion of the surface proposed in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a new type of anti-corrosion jacking pipe structure, including a concrete pipe provided with a steel mesh, characterized in that: limit slots are provided at both ends of the concrete pipe, and a limit block is provided at one end of the metal cover close to the concrete pipe, and the limit block is stuck inside the limit slot so that the two ends of the concrete pipe are sleeved with the metal cover; a plastic inner tube is injection-molded on the inner surface of the concrete pipe, and a fiberglass outer tube is provided on the outer surface of the concrete pipe; the metal cover is sleeved on the ends of the concrete pipe and the fiberglass outer tube, and the two ends of the plastic inner tube are located on the inner side of the metal cover and are flush with the end of the metal cover away from the concrete pipe.

[0006] As an improvement of the above technical solution, the steel mesh includes horizontal steels evenly distributed along the circumferential axial direction and steel rings arranged along the circumferential direction; the horizontal steels are welded to the steel rings, thereby improving the overall structural strength.

[0007] As an improvement to the above technical solution, the steel bar ring is a linear array, and the steel bar ring is welded by six broken line rings to ensure uniform force.

[0008] As an improvement to the above technical solution, the steel mesh has N steel rings evenly distributed along the axial direction to improve the overall structural strength.

[0009] As an improvement of the above technical solution, the limiting slot and the limiting block are isosceles trapezoidal structures, and the sizes of the limiting slot and the limiting block match, thereby improving the connection strength between the metal cover and the concrete pipe.

[0010] As an improvement to the above technical solution, the concrete pipe, plastic inner pipe and glass fiber reinforced plastic outer pipe are concentric tubular structures, which improves the compactness of the overall structure.

[0011] The beneficial effects of the utility model are:

[0012] 1. The metal covers sleeved at both ends of the concrete pipe provide enhanced protection for the concrete pipe, thereby improving the protection of the ends of the jacking pipe when the two ends are ejected and displaced, and increasing the strength of the jacking pipe structure. The limit blocks welded on the inner surface of the metal cover are stuck in the limit slots opened at the ends of the concrete pipe, thereby improving the reliability of the connection between the concrete pipe and the metal cover. The plastic inner pipe injection-molded on the inner surface of the concrete pipe and the glass fiber reinforced plastic outer pipe provided on the outer surface of the concrete pipe enable the plastic inner pipe to provide anti-corrosion protection for the inner surface of the concrete pipe and the glass fiber reinforced plastic outer pipe to provide anti-corrosion protection for the outer surface of the concrete pipe, thereby improving the anti-corrosion performance of the concrete pipe.

[0013] 2. The steel mesh composed of horizontal steel and steel rings is welded and fixed to the horizontal steel and steel rings, so that the steel mesh composed of horizontal steel and steel rings supports the concrete pipe. The steel rings are welded by six broken line rings, which makes it easier to weld and fix the steel rings to the horizontal steel distributed in a circular array. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0015] Figure 2 It is a partial cross-sectional structural diagram of the utility model;

[0016] Figure 3 This is a structural diagram of concrete pipe parts of the utility model;

[0017] Figure 4 for Figure 2 A magnified structural diagram at center A;

[0018] Figure 5 This is a structural diagram of a concrete pipe in the present utility model;

[0019] Figure 6 This is a structural diagram of the metal cover in the present utility model.

[0020] Figure numerals: 1. concrete pipe; 2. metal cover; 3. limit slot; 4. limit block; 5. plastic inner pipe; 6. fiberglass outer pipe; 7. steel mesh; 71. horizontal steel; 72. steel ring. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] See also Figure 1-6 The utility model provides a technical solution: a new type of anti-corrosion jacking structure, including a concrete pipe 1, and a steel mesh 7 for support arranged inside the concrete pipe 1, both ends of the concrete pipe 1 are sleeved with a metal cover 2, and both ends of the concrete pipe 1 are provided with a limit card groove 3, and the inner surface of the metal cover 2 is welded with a limit card block 4, and the limit card block 4 is stuck in the inside of the limit card groove 3. The inner surface of the concrete pipe 1 is injection-molded with a plastic inner tube 5, and the two ends of the plastic inner tube 5 are located on the inner side surface of the metal cover 2. The outer surface of the concrete pipe 1 is provided with a glass fiber reinforced plastic outer tube 6.

[0023] In this embodiment, the concrete pipe 1 is reinforced with the metal covers 2 sleeved at both ends of the concrete pipe 1, thereby improving the protection of the ends when the two ends of the jacking pipe are ejected and increasing the strength of the jacking pipe structure. The limit block 4 welded on the inner surface of the metal cover 2 is stuck in the limit slot 3 opened at the end of the concrete pipe 1, thereby improving the reliability of the connection between the concrete pipe 1 and the metal cover 2. The plastic inner tube 5 injection-molded on the inner surface of the concrete pipe 1 and the fiberglass outer tube 6 provided on the outer surface of the concrete pipe 1 enable the plastic inner tube 5 to provide anti-corrosion protection for the inner surface of the concrete pipe 1 and the fiberglass outer tube 6 to provide anti-corrosion protection for the outer surface of the concrete pipe 1, thereby improving the anti-corrosion performance of the concrete pipe 1.

[0024] Specifically, the steel mesh 7 includes horizontal steel bars 71 in an annular array and steel rings 72 welded and fixed on the horizontal steel bars 71. The steel rings 72 are in a linear array and are formed by welding six broken line rings.

[0025] In this embodiment, a reinforcement mesh 7 composed of horizontal steel bars 71 and reinforcement rings 72 is welded to the horizontal steel bars 71 and reinforcement rings 72, thereby supporting the concrete pipe 1. The reinforcement rings 72 are welded together from six broken line rings, which facilitates the welding and fixing of the reinforcement rings 72 to the horizontal steel bars 71 arranged in an annular array. The reinforcement mesh 7 has N reinforcement rings 72 evenly distributed along the axial direction, thereby improving the overall structural strength.

[0026] Specifically, the limiting card slot 3 and the limiting card block 4 are both isosceles trapezoidal structures, and the limiting card slot 3 and the limiting card block 4 are adapted to each other.

[0027] In this embodiment, the stability of the limiting block 4 installed in the limiting slot 3 is increased.

[0028] Specifically, the concrete pipe 1 , the plastic inner pipe 5 , and the glass fiber reinforced plastic outer pipe 6 are all concentric tubular structures.

[0029] In this embodiment, the roundness of the top pipe is increased.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A novel anti-corrosion pipe jacking structure, comprising a concrete pipe (1) provided with a steel mesh (7), characterized in that: The concrete pipe (1) is provided with limiting slots (3) at both ends, and a limiting block (4) is provided at one end of the metal cover (2) close to the concrete pipe (1). The limiting block (4) is stuck in the limiting slot (3), so that the two ends of the concrete pipe (1) are sleeved with the metal cover (2); a plastic inner tube (5) is injection-molded on the inner surface of the concrete pipe (1), and a glass fiber reinforced plastic outer tube (6) is provided on the outer surface of the concrete pipe (1); the metal cover (2) is sleeved on the ends of the concrete pipe (1) and the glass fiber reinforced plastic outer tube (6), and the two ends of the plastic inner tube (5) are located on the inner side surface of the metal cover (2) and are flush with the end of the metal cover (2) away from the concrete pipe (1).

2. The novel anti-corrosion pipe jacking structure according to claim 1 is characterized in that: The steel mesh (7) comprises horizontal steels (71) uniformly distributed along the circumferential axial direction and steel rings (72) arranged along the circumferential annular direction; the horizontal steels (71) and the steel rings (72) are welded together.

3. The novel anti-corrosion pipe jacking structure according to claim 2 is characterized in that: The steel bar ring (72) is a linear array, and the steel bar ring (72) is formed by welding six broken line rings.

4. The novel anti-corrosion pipe jacking structure according to claim 2 is characterized in that: The steel mesh (7) has N steel rings (72) evenly distributed along the axial direction.

5. The novel anti-corrosion pipe jacking structure according to claim 1 is characterized in that: The limiting card slot (3) and the limiting card block (4) are isosceles trapezoidal structures, and the limiting card slot (3) and the limiting card block (4) are matched in size.

6. The novel anti-corrosion pipe jacking structure according to claim 1 is characterized in that: The concrete pipe (1), the plastic inner pipe (5) and the glass fiber reinforced plastic outer pipe are concentric tubular structures.

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