Tunnel grouting and leaking stoppage structure spliced by duct pieces

Abstract

A tunnel grouting and leaking stoppage structure with spliced segments is used for leaking stoppage of a tunnel (11), the tunnel (11) is formed by splicing a plurality of shield segments (1) in a staggered mode, each shield segment (1) mainly comprises a concrete body (16), a water stop belt (3) is arranged on the periphery of each concrete body (16), each concrete body (16) is divided into a concrete body inner side (12) and a concrete body outer side (8), and each water stop belt (3) is connected with the corresponding shield segment (1). A connecting area (14) used for connection is arranged at the end of the inner side (12) of the concrete body, a grouting reconstituted water stop (10) used for leaking stoppage is formed on the outer side of the water stop (3), and the grouting reconstituted water stop (10) is formed by injecting grouting materials into the outer side of the water stop (3) through a grouting needle (9). The construction method has the beneficial effects that the grouting reconstructed water stop belt is formed between the water stop belt and the protective layer, a water leakage channel is effectively blocked, the waterproof effect is obviously superior to that of the prior art, and the durability is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to underground engineering leakage water treatment technical field, concretely is a kind of tunnel grouting plugging structure of segment splicing. BACKGROUND

[0002] In the underground engineering such as tunnel formed by segment, due to the influence of waterstop installation and segment assembly quality, waterstop misalignment and other phenomena are more common, leading to joint leakage water problem is more common. Although shield segment has synchronous and secondary grouting measures, but the effect is not obvious. For example, the patent with the announcement number CN113323696A proposes a kind of tunnel waterproof plugging reinforcing structure, by installing leakage-proof main plate in tunnel inner wall and placing waterproof bag, although leakage problem is solved to some extent, but still cannot accurately locate leakage point, and need manual intervention, and efficiency is lower. In addition, there are also methods of using grouting material for plugging in the prior art, but these methods are mostly passive plugging on the backwater surface, poor reliability, high re-leakage rate. Leakage water can cause high-voltage contact network and signal failure, and ballast slurry and mud, which brings serious hidden danger to train running safety, and it is urgent to properly cure.

[0003] The conventional technology for treating shield segment joint leakage water usually forms a cavity grouting by adopting seal joint interception bolt hole on the inner side of waterstop hole, i.e. intercepting water leakage channel in the segment joint on the inner side of waterstop hole. However, this conventional technology has the following problems: passive plugging on the backwater surface has poor reliability, and the re-leakage rate is relatively high; the plugging king is used to close the joint and bolt hole, which may fall off later, affecting train safety; drilling has certain damage to the segment; the leakage point cannot be accurately determined, only large-area plugging and grouting can be carried out, and the process is complex, the procedures are many, the material consumption is large, the work efficiency is low, the construction period is long, and the cost is high. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of shield segment joint leakage water treatment structure, by forming grouting re-creation waterstop on the outer side of waterstop, to block water leakage channel on the earth-facing side, repair the water stop function of segment, solve the problem of tunnel leakage water.

[0005] In order to achieve the above object, the technical scheme is adopted, a pipe piece splicing tunnel grouting plugging structure is used for plugging a tunnel (11), the tunnel (11) is formed by staggered splicing of a plurality of shield pipe pieces (1), the shield pipe piece (1) mainly comprises a concrete main body (16), a water stop belt (3) is arranged on the periphery of the concrete main body (16), the concrete main body (16) is divided into a concrete main body inner side (12) and a concrete main body outer side (8), an end of the concrete main body inner side (12) is provided with a connecting area (14) for connection, a grouting reconstructed water stop belt (10) for plugging is arranged on the outer side of the water stop belt (3), and the grouting reconstructed water stop belt (10) is formed by injecting grouting material into the outer side of the water stop belt (3) through a grouting needle (9).

[0006] Further, the grouting needle (9) is arranged in a pipe piece splicing joint (2) between two shield pipe pieces (1), and a top end of the grouting needle (9) penetrates the water stop belt (3).

[0007] Further, a needle hole position (7) is arranged on the pipe piece splicing joint (2), the grouting needle (9) is inserted into the needle hole position (7), and the length of the grouting needle (9) inserted into the pipe piece splicing joint (2) is L.

[0008] Further, the grouting needle (9) is arranged in a pipe piece splicing joint (2) between two shield pipe pieces (1), and a top end of the grouting needle (9) penetrates the water stop belt (3).

[0009] Further, the outer diameter of the needle rod of the grouting needle (9) is 2-8 mm.

[0010] Further, the L value is: the thickness of the concrete main body inner side (12) + the width of the water stop belt (3) < L < the thickness of the concrete main body inner side (12) + the width of the water stop belt (3) + 10 mm.

[0011] Further, the spacing of the grouting needle (9) is 50-100 cm.

[0012] Further, the inside of the connecting area (14) is provided with a rubber gasket (13), and the grouting needle (9) is inserted through the rubber gasket (13) through the connecting area (14), so that the needle can reach the water stop belt (3) without obstacles.

[0013] Further, the connecting area (14) is provided with an end bolt hole (15) for connecting two shield pipe pieces (1) to each other.

[0014] Further, the grouting material is inorganic gel material or chemical grouting material.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. By forming a grouting-reconstructed waterstop between the waterstop and the protective layer, the leakage channel is effectively blocked, and the waterproofing effect is significantly better than the existing technology, and the durability is stronger.

[0017] 2. Grouting and reconstructing waterstops can not only fill the gaps between the waterstop and the protective layer, but also enhance the connection between the segments and improve the stability of the tunnel structure.

[0018] 3. The process is simple and efficient, eliminating the need for traditional and cumbersome procedures. It only requires piercing the joint of the pipe segments with a needle at the leak location, which greatly improves work efficiency.

[0019] 4. Minimally invasive grouting is safe and reliable, does not affect the appearance of the segments, and avoids the problem of material falling off and affecting driving safety in traditional processes. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of tunnel (11);

[0021] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0022] Figure 3 This is a schematic diagram of the structure of the shield tunnel segment (1);

[0023] Figure 4 This is a practical cross-sectional diagram;

[0024] Figure 5 yes Figure 4 Enlarged view of the partial structure of the leak-sealing at point B.

[0025] 1: Shield tunnel segment; 2: Segment joint; 3: Waterstop; 4: Inner side of the tunnel; 5: Soil-facing side; 6: Bolt installation area; 7: Needle hole; 8: Outer side of the concrete main body; 9: Grouting needle; 10: Grouting reconstructed waterstop; 11: Tunnel; 12: Inner side of the concrete main body; 13: Rubber gasket; 14: Connection area; 15: End bolt hole; 16: Concrete main body. Detailed Implementation

[0026] like Figure 1 As shown, a tunnel (11) is composed of multiple shield tunnel segments (1) interlocked together, wherein the structure of the shield tunnel segment (1) is as follows: Figure 3 As shown, the shield tunnel segment (1) mainly includes a concrete body (16), a waterstop (3) is set around the perimeter of the concrete body (16), a connection area (14) for connection is provided at the end of the inner side (12) of the concrete body, the connection area (14) is provided with end bolt holes (15) for mounting bolts, a rubber gasket (13) is filled in the connection area (14), and a bolt installation area (6) is provided on the inner side of the inner side (12) of the concrete body.

[0027] As Figure 2 , 4 and 5, the inside of the tunnel (11) can be seen, the joint (2) between the two shield segments (1), the inside of the tunnel (11) is the hole side (4), when the hole side (4) leaks, then the needle hole (7) is evenly distributed on the joint (2), the grouting needle (9) is inserted into the needle hole (7), the top of the grouting needle (9) penetrates the water stop (3) and reaches the outside of the water stop (3). The outside of the rubber pad (13) is the soil side (5), and the grouting material is injected between the water stop (3) and the rubber pad (13) through the grouting needle (9) to form a grouting reformed water stop (10). The distance between the grouting needles (9) is 50-100cm. The length of the needle rod on the grouting needle (9) inserted into the shield segment (1) is L, and the value of L is: the thickness of the concrete main body inside (12) + the width of the water stop (3) < L < the thickness of the concrete main body inside (12) + the width of the water stop (3) + 10mm. The grouting material is inorganic gel material or inorganic nanogel material.

[0028] In specific use, when the tunnel (11) leaks, the joint leakage between the shield segments (1) in the tunnel (11) is checked, the grouting needle (9) is selected according to the size of the reinforced concrete segment main body (12) and the water stop (3) in the upper end of the shield segment (1). If the gap between the shield segments (1) is greater than the diameter of the needle rod on the grouting needle (9), the grouting needle (9) is directly inserted into the gap between the shield segments (1). If the gap between the shield segments (1) is less than the diameter of the needle rod on the grouting needle (9), the needle hole (7) is first punched by percussion drilling, and then the grouting needle (9) is inserted into the needle hole (7). When the grouting needle (9) penetrates the water stop (3), the needle is pulled back 5mm, which is beneficial to the flow and diffusion of the slurry at the specified position. The grouting material is injected between the water stop (3) and the concrete main body outside (8) through the grouting needle (9) by using a grouting machine to form a grouting reformed water stop (10). The formation of the grouting reformed water stop (10) can effectively plug the leakage between the shield segments (1).

[0029] The basic principles and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples.

Claims

1. A tunnel grouting plugging structure for segmental tunnel, which is used for plugging a tunnel (11) formed by a plurality of shield segments (1) staggered and connected, the shield segment (1) mainly comprises a concrete body (16), a water stop belt (3) is arranged on the periphery of the concrete body (16), the concrete body (16) is divided into a concrete body inner side (12) and a concrete body outer side (8), and an end of the concrete body inner side (12) is provided with a connecting area (14) for connection, characterized in that: A grouting reformed waterstop (10) for plugging is arranged outside the waterstop (3), and the grouting reformed waterstop (10) is formed by injecting grouting material into the outside of the waterstop (3) through a grouting needle (9). ​ 2. The pipe segment jointed tunnel grouting plugging structure according to claim 1, characterized in that: The grouting needle (9) is arranged in a segment joint (2) between two shield segments (1), and a top end of the grouting needle (9) penetrates the waterstop (3).

3. The pipe segment jointed tunnel grouting plugging structure according to claim 2, characterized in that: A needle hole (7) is arranged on the segment joint (2), the grouting needle (9) is inserted into the needle hole (7), and a length of the grouting needle (9) inserted into the segment joint (2) is L.

4. The tunnel grouting plugging structure of pipe section splicing according to any one of claims 1-3, characterized in that: An outer diameter of a needle rod of the grouting needle (9) is 2-8 mm.

5. The pipe segment jointed tunnel grouting plugging structure according to claim 3, characterized in that: The L value is: thickness of a concrete body inside (12) + width of the waterstop (3) < L < thickness of the concrete body inside (12) + width of the waterstop (3) + 10 mm.

6. The pipe segment jointed tunnel grouting plugging structure according to claim 1, characterized in that: A spacing of the grouting needle (9) is 50-100 cm.

7. The pipe segment jointed tunnel grouting plugging structure according to claim 1, characterized in that: An inner part of the connecting area (14) is provided with a rubber gasket (13), the grouting needle (9) is inserted through the rubber gasket (13) through the connecting area (14), and this is beneficial to the unobstructed arrival of the needle at the waterstop (3).

8. The tunnel grouting plugging structure of pipe splicing according to claim 7, characterized in that: An end bolt hole (15) for connecting two shield segments (1) to each other is arranged in the connecting area (14).

9. The pipe segment jointed tunnel grouting plugging structure according to claim 1, characterized in that: The grouting material is inorganic gel material or chemical grouting material.

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