A blind plate structure for a deformation joint of a tunnel constructed by open cut method and a method for installing the same

Abstract

The application discloses a kind of for open cut tunnel deformation joint drainage blind plate structure, the lower portion of deformation joint is provided with steel edge rubber waterstop, the two sides of the steel edge rubber waterstop are integrally poured with the lining structure located in the two sides of the deformation joint respectively, drainage blind plate structure includes: drainage plate, it is pasted to the bottom surface of the steel edge rubber waterstop, the two sides of the drainage plate are integrally poured with the lining structure located in the two sides of the deformation joint respectively;Longitudinal drainage unit, it is arranged on the drainage plate, for draining leakage water located in tunnel top;Two lateral drainage units, it is arranged on the drainage plate, and located in the two sides of the deformation joint, the lateral drainage unit is used to drain the flow around water of the steel edge rubber waterstop two sides and the lining structure concrete contact surface of corresponding side.This application's drainage blind plate does not need to embed joint processing when installation, will not affect train travel safety in later operation process, and can guarantee drainage effect.

Description

Technical Field

[0001] This invention relates to the field of open-cut tunnel construction. More specifically, this invention relates to a drainage blind flange structure for expansion joints in open-cut tunnels and its installation method. Background Technology

[0002] In open-cut tunnels, expansion joints are typically waterproofed using an external waterproofing layer and an embedded steel-edged rubber waterstop. The steel-edged rubber waterstop is placed below the expansion joint. Although the steel-edged rubber waterstop has strong waterproofing capabilities, if the pouring quality is poor or the tunnel is subjected to high water pressure, water can easily seep around the steel-edged rubber waterstop at the contact point with the lining concrete. Furthermore, if the tunnel settlement difference is too large, the steel-edged rubber waterstop may also be torn and damaged as the expansion joint settles, resulting in leakage and affecting the safety of train operation.

[0003] To enhance waterproofing, a ring-shaped blind pipe is typically installed below the steel-edged rubber waterstop. The holes on both sides of the blind pipe are sealed with flexible filling material, and the holes at the bottom of the blind pipe are sealed with caulking material. This works in conjunction with the steel-edged rubber waterstop to achieve double-layer waterproofing. However, when the tunnel settles, the flexible filling material on both sides of the blind pipe may crack, allowing leaking water to easily flow into the tunnel from both sides of the blind pipe. Furthermore, the caulking material is prone to falling off during later operation, which can also affect the safety of train operation. Summary of the Invention

[0004] Another objective of this invention is to provide a drainage blind flange structure for expansion joints in open-cut tunnels and its installation method that does not require caulking, will not affect train travel safety during later operation, and can ensure drainage effect.

[0005] To achieve these objectives and other advantages according to the present invention, a drainage blind flange structure for expansion joints in open-cut tunnels is provided, wherein a steel-edged rubber waterstop is disposed below the expansion joint, and the two sides of the steel-edged rubber waterstop are integrally cast with the lining structure located on both sides of the expansion joint, and the drainage blind flange structure includes:

[0006] A drainage board is attached to the bottom surface of the steel-edged rubber waterstop and is arranged circumferentially along the expansion joint. The two sides of the drainage board are integrally cast with the lining structure located on both sides of the expansion joint. The drainage board is made of a deformable material.

[0007] A longitudinal drainage unit is disposed on the drainage plate and located directly below the expansion joint. The longitudinal drainage unit is used to drain the seepage water located at the top of the tunnel.

[0008] Two transverse drainage units are disposed on the drainage plate and located on both sides of the expansion joint. The transverse drainage units are used to drain the water flowing around the contact surface of the lining structure concrete on both sides of the steel-edged rubber waterstop and the corresponding side.

[0009] Preferably, the drainage board includes a main board, which is a V-shaped structure with the opening direction facing the steel-edged rubber waterstop. Two wing plates are symmetrically arranged on both sides of the main board. The longitudinal drainage unit is arranged on the main board, and the two transverse drainage units are respectively arranged on the two wing plates.

[0010] The top surfaces of the two wing plates are bonded to the steel-edged rubber waterstop, and the bottom surfaces are integrally cast with the corresponding side lining structure.

[0011] Preferably, there is a gap between the main board and the steel-edged rubber waterstop, and the longitudinal drainage unit includes:

[0012] The drainage cavity is formed by the steel-edged rubber waterstop and the main board, and the two ends of the drainage cavity are respectively connected to the drainage ditches on both sides of the tunnel.

[0013] Multiple longitudinal drainage channels are distributed on the inner sidewall of the main board. Each longitudinal drainage channel is opened along the length direction of the main board, and both ends of each longitudinal drainage channel are connected to the drainage ditches on both sides of the tunnel. The longitudinal drainage channel is also connected to the drainage cavity.

[0014] Preferably, any transverse drainage unit includes multiple transverse drainage channels, which are spaced apart along the length of the corresponding wing plate, and any transverse drainage channel passes through both sides of the wing plate and communicates with the drainage cavity.

[0015] Preferably, an expansion seal is provided on the bottom surface of any wing plate.

[0016] Preferably, the connection points between the plurality of longitudinal drainage channels and the drainage cavity are covered with filter cloth.

[0017] Preferably, the width of the opening on the motherboard is smaller than the width of the expansion joint.

[0018] An installation method for a drainage blind flange structure for expansion joints in open-cut tunnels specifically includes the following steps:

[0019] S1. Attach the drainage board to the steel-edged rubber waterstop.

[0020] S2. Based on the installation process of steel-edged rubber waterstop, one side of the steel-edged rubber waterstop with the drainage board attached is fixed to the structural steel reinforcement of the lining structure to be constructed by means of a buckle; the two ends of the drainage cavity of the drainage board are connected to the drainage ditches on both sides of the tunnel respectively.

[0021] S3. Install the lining formwork and pour the lining structure concrete, so that one of the wing plates of the drainage board is poured as a whole with the lining structure concrete. After the concrete reaches the demolding strength, remove the lining formwork.

[0022] S4. Repeat steps S2 and S3 to construct the next lining structure. Cast the other wing of the drainage board into the concrete of the next lining structure, forming an expansion joint between the two lining structures.

[0023] The present invention has at least the following beneficial effects:

[0024] 1. The drainage board of the present invention is directly embedded in the lining structure on both sides of the expansion joint during installation, without the need for caulking. During later operation, there will be no situation where caulking material falls off and affects the safety of vehicle operation. The longitudinal drainage unit set on it is located directly below the expansion joint and can be used to drain the leakage water after the steel edge rubber waterstop is damaged. The transverse drainage unit can drain the water flowing around the contact surface between the concrete of the lining structure and the steel edge rubber waterstop, which can help to alleviate tunnel leakage. Furthermore, since the drainage board is embedded in the lining structure on both sides, the drainage board can also serve as a waterproof layer and can also achieve a waterproof effect.

[0025] 2. The drainage board of the present invention consists of a V-shaped main board and two wing plates. The main board is designed in a V-shape, which can adapt to large deformations. It is not easily damaged when the tunnel settlement difference at the deformation joint is too large, thus ensuring the drainage effect.

[0026] 3. In this invention, the drainage board and the steel-edged rubber waterstop are bonded together as a single unit. They are installed simultaneously with the steel-edged rubber waterstop, allowing the drainage board to be installed at the same time as the waterstop, without altering the original construction process.

[0027] Easy to construct.

[0028] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the installation structure of the drainage board of the present invention;

[0030] Figure 2 This is a schematic diagram of the circumferential arrangement structure of the drainage board of the present invention;

[0031] Figure 3 This is a side view of the drainage board of the present invention.

[0032] Figure 4 This is a front view structural diagram of the drainage board of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the drainage board and the steel-edged rubber waterstop of the present invention;

[0034] Explanation of reference numerals on the accompanying drawings:

[0035] 1. Lining structure; 2. Expansion joint; 3. Drainage board; 301. Main board; 302. Wing plate; 4. Steel-edged rubber waterstop; 5. Longitudinal drainage unit; 501. Drainage cavity; 502. Longitudinal drainage channel; 6. Transverse drainage unit; 601. Transverse drainage channel; 7. Drainage ditch. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0037] It should be noted that in the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] like Figure 1-5 As shown, the present invention provides a drainage blind flange structure for expansion joints in open-cut tunnels. A steel-edged rubber waterstop 4 is installed below the expansion joint 2. The two sides of the steel-edged rubber waterstop 4 are integrally cast with the lining structure 1 located on both sides of the expansion joint. The drainage blind flange structure comprises:

[0039] The drainage board 3 is attached to the bottom surface of the steel-edged rubber waterstop 4 and is arranged circumferentially along the expansion joint 2. The two sides of the drainage board 3 are integrally cast with the lining structure 1 located on both sides of the expansion joint 2. The drainage board 3 is made of deformable material.

[0040] A longitudinal drainage unit 5 is disposed on the drainage plate 3 and located directly below the expansion joint 2. The longitudinal drainage unit 5 is used to drain the seepage water located at the top of the tunnel.

[0041] Two transverse drainage units 6 are installed on the drainage plate 3 and located on both sides of the expansion joint 2. The transverse drainage units 6 are used to drain the water flowing around the concrete contact surface of the lining structure 1 on both sides of the steel-edged rubber waterstop 4 and the corresponding side.

[0042] In the above technical solutions, such as Figure 1 , Figure 2 and Figure 5As shown, the drainage board 3 is pasted onto the bottom surface of the steel-edged rubber waterstop 4 and installed circumferentially along the expansion joint 2 following the steel-edged rubber waterstop 4. The two sides of the drainage board 3 are directly embedded in the lining structure 1 on both sides of the expansion joint 2. No caulking treatment is required during installation, and there will be no situation where caulking material falls off during later operation, affecting the safety of vehicle operation. The longitudinal drainage unit 5 set on the drainage board 3 is located directly below the expansion joint 2 and can be used to drain the leakage water after the steel-edged rubber waterstop 4 is damaged. The two transverse drainage units 6 are set on both sides of the expansion joint 2 and are used to drain the water flowing around the contact surface between the concrete of the lining structure 1 and the steel-edged rubber waterstop 4. The whole system plays a role in guiding tunnel leakage and ensuring its drainage effect. In addition, the drainage board 3 is embedded in the lining structure 1 on both sides, and the drainage board 3 can also serve as a waterproof layer, playing a waterproof role.

[0043] In another technical solution, the drainage plate 3 includes a main plate 301, which is a V-shaped structure with the opening direction facing the steel-edged rubber waterstop 4. Two wing plates 302 are symmetrically arranged on both sides of the main plate 301. The longitudinal drainage unit 5 is arranged on the main plate 301, and the two transverse drainage units 6 are respectively arranged on the two wing plates 302.

[0044] The top surfaces of the two wing plates 302 are bonded to the steel-edged rubber waterstop 4, and the bottom surfaces are integrally cast with the corresponding side lining structure 1.

[0045] In this technical solution, such as Figure 3 As shown, the drainage board 3 consists of a V-shaped main board 301 and two wing plates 302. The main board 301 is designed in a V shape, which can adapt to large deformations. When the tunnel settlement difference on both sides of the deformation joint 2 is too large, it is not easily damaged, thus ensuring the drainage effect.

[0046] In another technical solution, there is a gap between the main board 301 and the steel-edged rubber waterstop 4, and the longitudinal drainage unit 5 includes:

[0047] The drainage cavity 501 is formed by the steel-edged rubber waterstop 4 and the main board 301, and the two ends of the drainage cavity 501 are respectively connected to the drainage ditches 7 on both sides of the tunnel.

[0048] Multiple longitudinal drainage channels 502 are distributed on the inner sidewall of the main board 301. Any longitudinal drainage channel 502 is opened along the length direction of the main board 301. Both ends of any longitudinal drainage channel 502 are connected to the drainage ditches 7 on both sides of the tunnel. The longitudinal drainage channel 502 is also connected to the drainage cavity 501.

[0049] In this technical solution, such as Figure 4As shown, the longitudinal drainage unit 5 is used to drain the seepage water after the steel-edged rubber waterstop 4 is damaged. Specifically, when the steel-edged rubber waterstop 4 is broken, the seepage water collects in the drainage chamber 501 through the expansion joint 2 and the damaged part of the steel-edged rubber waterstop 4, and is discharged to the drainage ditch 7 through the drainage chamber 501. The drainage chamber 501 is the main discharge channel for the seepage water. When both ends of the drainage chamber 501 are blocked, and the seepage water cannot be discharged to the drainage ditch 7 through the drainage chamber 501, the seepage water in the drainage chamber 501 can still be discharged through the longitudinal drainage channel 502, since the longitudinal drainage channel 502 is connected to the drainage chamber 501 and the drainage ditch 7, thus ensuring the drainage capacity. The two ends of the water cavity 501 are directly connected to the drainage ditches 7 on both sides. When the drainage of the drainage cavity 501 is not smooth, it can be backwashed through the end of the drainage cavity 501 to clear the drainage cavity 501 and ensure its drainage effect. Since the wing plate 302 of the drainage plate 3 is pasted on the steel edge rubber waterstop 4, the main plate 301 and the steel edge rubber waterstop 4 form a closed cavity structure with only openings at both ends. The drainage cavity 501 and the longitudinal drainage channel 502 are set in the cavity structure. When the concrete of the lining structure 1 is poured later, the grout can be prevented from blocking the drainage cavity 501 and the longitudinal drainage channel 502 during the pouring process, thus ensuring the subsequent drainage effect.

[0050] In another technical solution, any transverse drainage unit 6 includes a plurality of transverse drainage channels 601, which are spaced apart along the length direction of the corresponding wing plate 302. Any transverse drainage channel 601 passes through both sides of the wing plate 302 and communicates with the drainage cavity 501.

[0051] In this technical solution, the steel-edged rubber waterstop 4 is placed below the expansion joint 2. Water collected at the expansion joint 2 will seep into the gap between the steel-edged rubber waterstop 4 and the concrete of the lining structure 1 located on its top surface, and then seep along the top, sides, and bottom surface of the steel-edged rubber waterstop 4, finally seeping into the tunnel from the concrete of the lining structure 1 located on the bottom surface of the steel-edged rubber waterstop 4. This causes seepage around the tunnel, affecting the tunnel quality. To avoid seepage around the tunnel, the transverse drainage channel of this invention... 601 is used to drain the water flowing around the contact surface between the concrete of the lining structure 1 and the steel-edged rubber waterstop 4. Specifically, when water flows around the side of the steel-edged rubber waterstop 4, since the wing plate 302 is attached to the bottom surface of the steel-edged rubber waterstop 4 and the wing plate 302 has a transverse drainage channel 601 that runs through both sides of the wing plate 302, the water will flow along the wing plate 302 into the transverse drainage channel 601, and finally collect in the drainage cavity 501 and be discharged into the drainage ditch 7, thus avoiding leakage due to water flowing around the surface.

[0052] In another technical solution, an expansion waterstop 4 is provided on the bottom surface of any wing plate 302.

[0053] In this technical solution, a water-swellable waterstop 4 is added to the bottom surface of the wing plate 302. The waterstop 4 is used to absorb the water that does not enter the transverse drainage channel 601 and prevent the water from seeping into the tunnel from the concrete of the lining structure 1 located on the bottom surface of the wing plate 302.

[0054] In another technical solution, the connection between the plurality of longitudinal drainage channels 502 and the drainage cavity 501 is covered with filter cloth.

[0055] In this technical solution, the filter cloth arranged on the surface of the multiple longitudinal drainage channels 502 is used to filter the leaking water and prevent the longitudinal drainage channels 502 from being blocked, thus affecting the drainage effect.

[0056] In another technical solution, the width of the opening of the motherboard 301 is smaller than the width of the expansion joint 2.

[0057] In this technical solution, the width of the opening of the main board 301 is smaller than the width of the expansion joint 2. After the drainage board 3 is installed, it is not compressed by the lining structure 1 on both sides, which can ensure the deformation capacity of the main board 301.

[0058] An installation method for a drainage blind flange structure in an open-cut tunnel expansion joint 2 specifically includes the following steps:

[0059] S1. Lay the steel-edged rubber waterstop 4 upside down on the ground and clean the surface of the area where the steel-edged rubber waterstop 4 and the drainage board 3 are pasted together; paste the two wing plates 302 of the drainage board 3 onto the steel-edged rubber waterstop 4 as a whole, and after pasting, use a wooden mallet to hammer it to make the wing plates 302 of the drainage board 3 and the steel-edged rubber waterstop 4 firmly pasted together.

[0060] S2. Based on the installation process of the steel-edged rubber waterstop 4, following the installation steps of the steel-edged rubber waterstop 4, one side of the steel-edged rubber waterstop 4 with the drainage board 3 attached is fixed to the structural steel reinforcement of the lining structure 1 to be constructed by means of a buckle; the two ends of the drainage cavity 501 of the drainage board 3 are respectively connected to the drainage ditches 7 on both sides of the tunnel.

[0061] S3. Install the lining template, check whether the contact between the drainage board 3 and the lining template is tight, seal any holes and gaps, and pour the concrete for the lining structure 1 so that one of the flanges 302 of the drainage board 3 is poured as a whole with the concrete for the lining structure 1. After the concrete reaches the demolding strength, remove the lining template. Before pouring the concrete, a microporous filter cloth can be arranged at the end of the transverse drainage channel 601 away from the main board 301 to prevent the concrete slurry from blocking the transverse drainage channel 601 during the concrete pouring process.

[0062] S4. Repeat steps S2 and S3 to construct the next lining structure 1. The other wing plate 302 of the drainage board 3 is cast integrally with the concrete of the next lining structure 1, forming a deformation joint 2 between the two lining structures 1.

[0063] In the above technical solution, the drainage board 3 and the steel-edged rubber waterstop 4 are constructed simultaneously. The drainage board 3 can be installed at the same time as the steel-edged rubber waterstop 4, without changing the original construction process, making construction convenient.

[0064] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A drainage blind flange structure for expansion joints in open-cut tunnels, wherein a steel-edged rubber waterstop is provided below the expansion joint, and both sides of the steel-edged rubber waterstop are integrally cast with the lining structure located on both sides of the expansion joint, characterized in that... The drainage blind flange structure includes: A drainage board is attached to the bottom surface of the steel-edged rubber waterstop and is arranged circumferentially along the expansion joint. The two sides of the drainage board are integrally cast with the lining structure located on both sides of the expansion joint. The drainage board is made of a deformable material. A longitudinal drainage unit is disposed on the drainage plate and located directly below the expansion joint. The longitudinal drainage unit is used to drain the seepage water located at the top of the tunnel. Two transverse drainage units are disposed on the drainage plate and located on both sides of the expansion joint. The transverse drainage units are used to drain the water flowing around the contact surface of the lining structure concrete on both sides of the steel-edged rubber waterstop and the corresponding side.

2. The drainage blind flange structure for expansion joints in open-cut tunnels as described in claim 1, characterized in that, The drainage board includes a main board, which is a V-shaped structure with the opening direction facing the steel-edged rubber waterstop. Two wing plates are symmetrically arranged on both sides of the main board. The longitudinal drainage unit is arranged on the main board, and the two transverse drainage units are respectively arranged on the two wing plates. The top surfaces of the two wing plates are bonded to the steel-edged rubber waterstop, and the bottom surfaces are integrally cast with the corresponding side lining structure.

3. The drainage blind flange structure for expansion joints in open-cut tunnels as described in claim 2, characterized in that, There is a gap between the main board and the steel-edged rubber waterstop, and the longitudinal drainage unit includes: The drainage cavity is formed by the steel-edged rubber waterstop and the main board, and the two ends of the drainage cavity are respectively connected to the drainage ditches on both sides of the tunnel. Multiple longitudinal drainage channels are distributed on the inner sidewall of the main board. Each longitudinal drainage channel is opened along the length direction of the main board, and both ends of each longitudinal drainage channel are connected to the drainage ditches on both sides of the tunnel. The longitudinal drainage channel is also connected to the drainage cavity.

4. The drainage blind flange structure for expansion joints in open-cut tunnels as described in claim 3, characterized in that, Any transverse drainage unit includes multiple transverse drainage channels, which are spaced apart along the length of the corresponding wing plate. Any transverse drainage channel passes through both sides of the wing plate and communicates with the drainage cavity.

5. The drainage blind flange structure for expansion joints in open-cut tunnels as described in claim 2, characterized in that, An expansion seal is provided on the bottom surface of each wing plate.

6. The drainage blind flange structure for expansion joints in open-cut tunnels as described in claim 3, characterized in that, The connections between the longitudinal drainage channels and the drainage chamber are covered with filter cloth.

7. The drainage blind flange structure for expansion joints in open-cut tunnels as described in claim 2, characterized in that, The width of the opening on the motherboard is smaller than the width of the expansion joint.

8. A method for installing a drainage blind flange structure for expansion joints in open-cut tunnels as described in any one of claims 1-7, characterized in that, Specifically, the following steps are included: S1. Attach the drainage board to the steel-edged rubber waterstop. S2. Based on the installation process of steel-edged rubber waterstop, one side of the steel-edged rubber waterstop with the drainage board attached is fixed to the structural steel reinforcement of the lining structure to be constructed by means of a buckle; the two ends of the drainage cavity of the drainage board are connected to the drainage ditches on both sides of the tunnel respectively. S3. Install the lining formwork and pour the lining structure concrete, so that one of the wing plates of the drainage board is poured as a whole with the lining structure concrete. After the concrete reaches the demolding strength, remove the lining formwork. S4. Repeat steps S2 and S3 to construct the next lining structure. Cast the other wing of the drainage board into the concrete of the next lining structure, forming an expansion joint between the two lining structures.

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