Bidirectional connecting structure for connecting cast-in-place lining and duct piece of diversion tunnel

Abstract

The utility model discloses a bidirectional connecting structure for connecting a cast-in-place lining and a duct piece of a diversion tunnel, which relates to the field of tunnel construction, and is characterized in that the connecting structure is a structure for connecting the duct piece of the diversion tunnel and the reinforced concrete cast-in-place lining together, and is positioned between the duct piece and the cast-in-place lining; embedded steel bars of the connecting structure are inserted into the pipe pieces, pipe piece connecting steel bars extend outwards from the embedded steel bars, after the length of the pipe piece connecting steel bars reaches the thickness of a concrete protection layer, the pipe piece connecting steel bars are bent by 90 degrees to the connecting points of the first layer of steel bars of the cast-in-place lining, and then connecting rods continue to extend outwards. And the connecting rod is bent by 90 degrees to form a fixed hook after reaching a second layer of steel bar connecting point of the cast-in-place lining. According to the utility model, the segment lining and the reinforced concrete cast-in-place lining of the water diversion tunnel can be connected together, the durability of the tunnel structure is improved, the overall bearing capacity of the structure is improved, the connection tightness of the lining and the segment is improved under the action of internal water pressure, and the waterproof and anti-seepage capacities of the structure are improved.

Description

Technical Field

[0001] The utility model relates to the field of tunnel construction, in particular to a bidirectional connection structure used for connecting a cast-in-situ lining and pipe segments of a water diversion tunnel. Background Art

[0002] In diversion tunnels, linings are primarily used to ensure surrounding rock stability and reduce water infiltration. Double-layer linings offer significant advantages in fire protection, waterproofing, explosion resistance, earthquake resistance, and settlement resistance. However, during water filling, cracking and damage between the reinforced concrete lining and the segments of the diversion tunnel are common.

[0003] Due to the complex environment in which tunnels are located, steel plate lining is often used in traditional double-layer linings to reduce internal water seepage. However, this method has high engineering costs and is difficult to construct inside the tunnel. Taking into account factors such as economic benefits and engineering technology, reinforced concrete has begun to replace steel plate linings in double-layer structures. The overall structure is "surrounding rock + pipe segments + reinforced concrete." For this type of tunnel, lining cracking is a common problem in engineering. When cracks appear in the lining, the water leaking along the cracks will slowly erode the steel bars in the lining, greatly affecting the bearing capacity and durability of the lining structure. Therefore, a two-way connection structure for connecting the cast-in-place lining and pipe segments of the water diversion tunnel is urgently needed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a bidirectional connection structure for connecting the cast-in-situ lining and pipe segments of a water diversion tunnel.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A bidirectional connection structure for connecting the cast-in-situ lining of a water diversion tunnel to the pipe segments. The connection structure connects the pipe segments and the reinforced concrete cast-in-situ lining of the water diversion tunnel. The connection structure is located between the pipe segments and the cast-in-situ lining. The embedded steel bars of the connection structure are inserted into the pipe segments, and pipe segment connecting steel bars extend outward from the embedded steel bars. After the length of the pipe segment connecting steel bars reaches the thickness of the concrete cover, they are bent 90 degrees to the connection point of the first layer of steel bars of the cast-in-situ lining. They continue to extend outward to form a connecting rod. After the connecting rod reaches the connection point of the second layer of steel bars of the cast-in-situ lining, it is bent 90 degrees to form a fixed hook. The embedded steel bars can connect the pipe segments. By placing the embedded steel bars into a mold during the casting of the pipe segments, the pipe segments are tightly connected to the connection structure. The fixed hook can be fixedly connected to the cast-in-situ lining.

[0007] Furthermore, the connection structure is located on a side of the pipe segment close to the cast-in-place lining.

[0008] Furthermore, the connection points of the first layer of steel bars of the cast-in-situ lining are tied and connected to the inner layer of steel bars of the cast-in-situ lining.

[0009] Furthermore, the second layer steel bar connection points of the cast-in-situ lining are tied and connected to the outer layer steel bars of the cast-in-situ lining.

[0010] Furthermore, the connection structure is connected to the cast-in-place lining through the solidification of the poured concrete slurry after the pipe segments are assembled.

[0011] Furthermore, the connection structures are grouped together and fixed on the pipe segments to bear the force together.

[0012] Furthermore, the connection structure and the pipe segment are integrally formed.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model can connect the water diversion tunnel segments and the cast-in-place lining skeleton, and can connect the segments and the reinforced concrete cast-in-place lining together, thereby improving the bearing capacity of the entire structure, avoiding the separation of the segments and the cast-in-place lining, and improving the crack resistance of the tunnel lining.

[0015] 2. The utility model can enhance the ability of the structure to withstand internal water pressure, and can tightly connect the water diversion tunnel segments and the cast-in-place lining skeleton, thereby avoiding water seepage in the tunnel structure due to the segments and the cast-in-place lining, and improving the anti-seepage ability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of a bidirectional connection structure for connecting the cast-in-situ lining and pipe segments of a diversion tunnel proposed by the present invention;

[0017] Figure 2 This is a schematic assembly diagram of a bidirectional connection structure for connecting the cast-in-situ lining and segments of a diversion tunnel proposed in the present invention;

[0018] In the figure: 1 fixed hook, 2 connection point of the second layer of steel bars of cast-in-place lining, 3 connecting rod, 4 connection point of the first layer of steel bars of cast-in-place lining, 5 connecting steel bars of pipe segments, 6 embedded steel bars, 7 pipe segments, 11 connection structure, 12 cast-in-place lining. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] See also Figure 1 and Figure 2Figure 1 shows a bidirectional connection structure for connecting the cast-in-situ lining and segments of a water diversion tunnel. Connection structure 11 connects the segments 7 and the reinforced concrete cast-in-situ lining 12 of the water diversion tunnel. Connection structure 11 is located between the segments 7 and the cast-in-situ lining 12. Pre-embedded steel bars 6 of connection structure 11 are inserted into the segments 7, from which segment connecting bars 5 extend outward. After reaching the thickness of the concrete cover, the segment connecting bars 5 are bent 90 degrees to the connection point 4 of the first layer of steel bars in the cast-in-situ lining. The connecting bars 5 then extend outward to form connecting rods 3. After reaching the connection point 2 of the second layer of steel bars in the cast-in-situ lining, they are bent 90 degrees to form fixed hooks 1. After the lining is poured, the connecting structure 11 connects the shield tunnel's segment lining and the reinforced concrete cast-in-place lining to form an integral structure, which can clearly define the structural stress and ensure that the internal water pressure borne by the tunnel structure during the water filling process can be simultaneously transmitted to the cast-in-place lining 12 through the connecting structure 11. The cast-in-place lining 12 shares a certain load, which can correspondingly reduce the load on the tunnel segment lining and improve the pressure-bearing capacity of the segment 7, thereby improving the overall crack resistance of the structure. After the concrete is poured, the concrete slurry fills around the connecting structure and is sealed around the connecting structure. After the internal seepage flows into the space between the segment 7 and the cast-in-place lining 12, the connecting structure 11 forms an integral structure with the segment 7 and the cast-in-place lining 12, which can prevent further water seepage and improve the waterproof performance of the lining structure.

[0021] In the present invention, the embedded steel bars 6 can connect the pipe segments 7. By placing the embedded steel bars 6 into the mold during the casting of the pipe segments, the pipe segments 7 are tightly connected to the connecting structure 11, and the fixed hook 1 can be fixedly connected to the cast-in-place lining 12. The connecting structure 11 is located on the side of the pipe segment 7 close to the cast-in-place lining 12. The first layer of steel bar connection point 4 of the cast-in-place lining is tied and connected to the inner layer of steel bars of the cast-in-place lining 12 of the tunnel. The second layer of steel bar connection point 2 of the cast-in-place lining is tied and connected to the outer layer of steel bars of the cast-in-place lining 12. After the pipe segments 7 are assembled, the connecting structure 11 is connected to the cast-in-place lining 12 through the solidification of the poured concrete slurry. A plurality of connecting structures 11 are grouped together, fixed on the pipe segment 7, and bear force together. The connecting structure 11 and the pipe segment 7 are formed as one piece.

[0022] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bidirectional connection structure for connecting the cast-in-situ lining and the segments of a diversion tunnel, characterized in that: The connecting structure (11) is a structure for connecting the pipe segment (7) and the reinforced concrete cast-in-situ lining (12) of the water diversion tunnel. The connecting structure (11) is located between the pipe segment (7) and the cast-in-situ lining. The embedded steel bars (6) of the connecting structure (11) are inserted into the pipe segment (7). Pipe segment connecting steel bars (5) extend outward from the embedded steel bars (6). After the length of the pipe segment connecting steel bars (5) reaches the thickness of the concrete protective layer, they are bent 90 degrees to the first layer steel bar connection point (4) of the cast-in-situ lining and continue to extend outward to form a connecting rod (3). After the connecting rod (3) reaches the second layer steel bar connection point (2) of the cast-in-situ lining, they are bent 90 degrees to form a fixed hook (1). The embedded steel bars (6) can connect the pipe segment. By placing the embedded steel bars (6) into a mold during the casting of the pipe segment, the pipe segment (7) and the connecting structure (11) are tightly connected. The fixed hook (1) can be fixedly connected to the cast-in-situ lining (12).

2. A bidirectional connection structure for connecting the cast-in-situ lining and the segments of a diversion tunnel according to claim 1, characterized in that: The connection structure (11) is located on a side of the pipe segment (7) close to the cast-in-situ lining (12).

3. A bidirectional connection structure for connecting the cast-in-situ lining and the segments of a diversion tunnel according to claim 1, characterized in that: The first layer steel bar connection point (4) of the cast-in-situ lining is connected to the inner layer steel bars of the cast-in-situ lining (12) by binding.

4. A bidirectional connection structure for connecting the cast-in-situ lining and the segments of a diversion tunnel according to claim 1, characterized in that: The second layer steel bar connection point (2) of the cast-in-situ lining is connected to the outer layer steel bars of the cast-in-situ lining (12) by binding.

5. The bidirectional connection structure for connecting the cast-in-situ lining and the segments of a diversion tunnel according to claim 1, characterized in that: After the pipe segments (7) are assembled, the connection structure is connected to the cast-in-place lining (12) through the solidification of the poured concrete slurry.

6. The bidirectional connection structure for connecting the cast-in-situ lining and the segments of a diversion tunnel according to claim 1, characterized in that: The connection structures (11) are grouped together and fixed to the pipe segments (7) to bear the force together.

7. The bidirectional connection structure for connecting the cast-in-situ lining and the segments of a diversion tunnel according to claim 1, characterized in that: The connecting structure (11) and the tube sheet (7) are integrally formed.

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