Tunnel grouting pipe

Abstract

A tunnel grouting pipe, made of RPC concrete, ensures homogeneity with the cement-based secondary lining concrete. Uniform protrusions ensure full bonding between the grouting pipe and the secondary lining concrete, preventing detachment and water leakage into the tunnel space through the contact surface. A cross-shaped grout outlet at the top of the grouting pipe allows for unobstructed injection of grout into the void area between the secondary lining concrete and the initial support. A positioning ring and tensioning rod of the fixing body, along with a quick-connect interface to the transition sleeve, rapidly connect the grouting pipe to the pressure grouting pipe, enabling effective pressurized entry of grout into the void area.

Description

Technical Field

[0001] This utility model belongs to the field of railway tunnel secondary lining concrete grouting, specifically relating to a tunnel grouting pipe. Background Technology

[0002] Voids behind the secondary lining are a common occurrence during tunnel construction. To improve this quality defect, grouting is necessary to fill the voids behind the secondary lining concrete, ensuring the overall strength of the lining concrete and enhancing its waterproofing. However, achieving this grouting function requires grouting pipes. Existing methods, such as steel pipes, cement pipes, and smooth RPC grouting pipes, all have the drawback of being only smoothly bonded to the secondary lining concrete surface, leading to potential detachment and water leakage after operation. A new technical solution is needed to address these issues. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a tunnel grouting pipe and its application.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: A tunnel grouting pipe is characterized in that it includes a body (1) composed of a steel mesh (101), a PRC concrete rod (102), an anchoring boss (103), and a positioning boss (104); a fixing body (3) composed of a positioning ring (301) and a tensioning rod (302); the fixing body (3) is bolted to the trolley (2); the transition sleeve (4) is tightened and pressure connected to the body (1) through the fixing body (3); and the grouting pipe (5) is pressed into the transition sleeve (4).

[0005] The main body (1) is made of RPC concrete. The steel mesh (101) is cast in the PRC concrete rod (102). The PRC concrete rod (102) is hollow and has a cross-shaped opening at the top with a depth of 2-4cm. The anchoring boss (103) is a circular boss. The positioning boss (104) has a diameter 0.5-1.5mm smaller than the inner diameter of the fixing body (3).

[0006] The external fixing body (3) is a hollow circular steel platform. The positioning ring (301) and the tensioning rod (302) are fastened together by fasteners and the fixing part of the transition sleeve (4).

[0007] The locking transition sleeve (4) is a hollow variable diameter pipe with a diameter slightly smaller than that of the front positioning ring (301) and the same diameter as that of the rear grouting pipe (5).

[0008] The grouting pipe (5) is a high-pressure steel wire hose.

[0009] The beneficial effects of this utility model are: This grouting pipe is made of RPC concrete, ensuring homogeneity with the cement-based secondary lining concrete. Uniform protrusions ensure a strong bond between the grouting pipe and the secondary lining concrete, preventing detachment and water leakage into the tunnel space through the contact surface. A cross-shaped grout outlet at the top of the grouting pipe allows for unobstructed injection of grout into the void area between the secondary lining concrete and the initial support. The positioning ring and tensioning rod of the fixing body, along with the quick-connect interface of the transition sleeve, quickly connect the grouting pipe to the pressure grouting pipe, enabling effective pressurized grout injection into the void area. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the utility model.

[0011] Among them, 1 is the main body, 101 is the steel mesh, 102 is the PRC concrete pole, 103 is the anchoring boss, 104 is the positioning boss, 2 is the trolley, 3 is the fixing body, 301 is the positioning ring, 302 is the tensioning rod, 4 is the transition sleeve, and 5 is the grouting pipe. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] like Figure 1 As shown, a tunnel grouting pipe is characterized by comprising a body 1, which is composed of a steel mesh 101, a PRC concrete rod 102, an anchoring boss 103, and a positioning boss 104; a fixing body 3, which is composed of a positioning ring 301 and a tensioning rod 302; the fixing body 3 is bolted to the trolley 2; the transition sleeve 4 is tightened and pressure connected to the body 1 through the fixing body 3; and the grouting pipe 5 is press-fitted to the transition sleeve 4.

[0014] The main body 1 is made of RPC concrete. The steel mesh 101 is cast in the PRC concrete rod 102. The PRC concrete rod 102 is a hollow body with a cross-shaped opening at the top and a depth of 2-4cm. The anchoring boss 103 is a circular boss, and the positioning boss 104 has a diameter 0.5-1.5mm smaller than the inner diameter of the fixing body 3.

[0015] The external fixing body 3 is a hollow circular steel platform, and the positioning ring 301 and the tensioning rod 302 are fastened to the fixing part of the transition sleeve 4 by fasteners.

[0016] The locking transition sleeve 4 is a hollow reducing pipe with a diameter slightly smaller than that of the front positioning ring 301, and the rear end has the same diameter as the grouting pipe 5.

[0017] The grouting pipe 5 is a high-pressure steel wire hose.

[0018] The working principle of this utility model is as follows: This invention utilizes RPC concrete to ensure homogeneity with the cement-based secondary lining concrete. Uniform protrusions ensure full bonding between the grouting pipe and the secondary lining concrete, preventing detachment and water leakage into the tunnel space through the contact surface. A cross-shaped grout outlet at the top of the grouting pipe allows for unobstructed injection of grout into the void area between the secondary lining concrete and the initial support. The positioning ring and tensioning rod of the fixing body, along with the quick-connect interface of the transition sleeve, rapidly connect the grouting pipe and the pressure grouting pipe, enabling effective pressurized entry of the grout into the void area.

Claims

1. A tunnel grouting pipe, comprising a body (1), characterized in that: The main body (1) is composed of a steel mesh (101), a concrete rod (102), an anchoring boss (103), and a positioning boss (104). The main body (1) is made of concrete. The steel mesh (101) is cast in the concrete rod (102). An anchoring boss (103) is provided on the outside of the concrete rod (102), and a positioning boss (104) is provided at the lower end. The fixing body (3) consists of a positioning ring (301) and a tension rod (302); the fixing body (3) is a hollow circular steel platform, and the positioning ring (301) and the tension rod (302) are fastened to the fixing part of the transition sleeve (4) through fasteners; The fixed body (3) is bolted to the trolley (2); The transition sleeve (4) is tightened and pressure connected to the main body (1) through the fixing body (3), and the grouting pipe (5) is pressed into the transition sleeve (4).

2. The tunnel grouting pipe according to claim 1, characterized in that, The transition sleeve (4) is a hollow variable diameter pipe with a diameter smaller than that of the front positioning ring (301) and the same diameter as that of the rear grouting pipe (5).

3. A tunnel grouting pipe according to claim 1, characterized in that, The grouting pipe (5) is a high-pressure steel wire hose.

4. A tunnel grouting pipe according to claim 1, characterized in that, The concrete rod (102) is hollow, with a cross-shaped opening at the top, the depth of which is 2-4 cm.

5. A tunnel grouting pipe according to claim 1, characterized in that, The anchoring boss (103) is a circular boss.

6. A tunnel grouting pipe according to claim 1, characterized in that, The diameter of the positioning boss (104) is 0.5 to 1.5 mm smaller than the inner diameter of the fixing body (3).

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