Waterproof system of double-layer lining shield tunnel structure

Abstract

The utility model discloses a double-layer lining shield tunnel structure waterproof system which comprises a shield segment and a secondary lining in a tunnel, the shield segment and the secondary lining are provided with waterproof subareas in the longitudinal direction of the tunnel, each waterproof subarea is internally provided with a water guide and drainage assembly, and a secondary lining construction joint water stop belt is laid between the shield segment and the secondary lining. The length of the waterproof subarea is equal to the primary pouring length of the secondary lining, a secondary lining construction joint water stop belt is arranged on the outer side of a secondary lining annular construction joint, and the waterproof subarea comprises a pipe piece outer waterproof structure and a pipe piece end waterproof structure. The waterproof system of the double-layer lining structure of the shield tunnel is mainly used for prevention, combined with prevention and drainage, and responded in different areas. The shield tunnel waterproof structure solves the waterproof problem of a shield tunnel structure in a high-water-pressure environment, longitudinal flowing of leaked water at the back of a secondary lining of a pipe piece joint is avoided, zoning management of tunnel structure waterproof is achieved, and structure waterproof control is better carried out.

Description

Technical Field

[0001] The utility model belongs to the technical field of shield tunnel waterproofing, and particularly relates to a waterproof system for a double-layer lining shield tunnel structure. Background Technique

[0002] In recent years, shield tunnel projects constructed in soft soil strata and underwater environments have been increasing. The segment structure may be damaged under the action of fires inside the tunnel, internal and external corrosive media, etc., and it is difficult to repair. There are more and more cases of pouring a secondary lining inside the segment lining of shield tunnels.

[0003] At present, the waterproof system for shield tunnel structures mainly forms a fully enclosed structure waterproof system by strengthening joint waterproofing on the basis of the self-waterproofing of segment concrete. When an inner lining is provided in a shield tunnel, a waterproof layer is often not provided between the inner lining and the segment structure. The water-stop effect of the tunnel largely depends on the waterproof performance of the outer segment lining. For cross-river and cross-sea shield tunnels with high water pressure, due to factors such as the aging of gasket waterproof materials and construction damage, structural leakage often occurs under the action of external water pressure. It is difficult to detect water leakage in the external segment structure of double-layer lining shield tunnels, and at the same time, it also increases the hidden danger of forming water pressure behind the inner lining and affecting the structural safety. Summary of the Invention

[0004] The utility model is proposed to solve the problems existing in the prior art, and its purpose is to provide a waterproof system for a double-layer lining shield tunnel structure.

[0005] The technical solution of the utility model is: a waterproof system for a double-layer lining shield tunnel structure, including shield segments and a secondary lining inside the tunnel. Waterproof partitions are arranged longitudinally along the tunnel for the shield segments and the secondary lining. A drainage component is arranged in each waterproof partition. A water-stop belt for the construction joint of the secondary lining is laid between the shield segments and the secondary lining, thereby establishing a compartmentalized waterproof partition.

[0006] Furthermore, the length of the waterproof partition is the length of one-time pouring of the secondary lining.

[0007] Furthermore, the water-stop belt for the construction joint of the secondary lining is arranged outside the circumferential construction joint of the secondary lining.

[0008] Furthermore, the waterproof partition includes a waterproof structure for segment joints and a drainage component.

[0009] Furthermore, the waterproof structure for segment joints includes a joint sealing structure and a caulking sealing structure.

[0010] Furthermore, the joint sealing structure is a segment joint sealing gasket. Sealing gasket grooves are formed on the butting end faces of the shield segments, and a segment joint sealing gasket is arranged in the sealing gasket grooves, and the corresponding segment joint sealing gaskets are extruded for sealing.

[0011] Furthermore, the caulking sealing structure is a segment caulking sealing strip. Adjacent shield segments enclose to form a caulking groove, and the segment caulking sealing strip is arranged in the caulking groove.

[0012] Furthermore, an internal drainage groove is formed in the segment caulking sealing strip, and the drainage assembly includes the segment caulking sealing strip and a longitudinal drainage blind pipe.

[0013] Furthermore, the segment caulking sealing strip is communicated with the longitudinal drainage blind pipe behind the secondary lining, and the end of the longitudinal drainage blind pipe behind the secondary lining is connected to the drainage ditch in the tunnel.

[0014] The beneficial effects of the present utility model are as follows:

[0015] The present utility model establishes a waterproof system for the double-layer lining structure of the shield tunnel with the principle of "prevention first, combination of prevention and drainage, and zoning response".

[0016] The present utility model solves the waterproof problem of the shield tunnel structure in a high water pressure environment, avoids the longitudinal flow of water leakage at the segment joints behind the secondary lining, realizes the zonal management of the waterproof of the tunnel structure, and better controls the waterproof of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the present utility model;

[0018] Figure 2 is a schematic diagram of zonal waterproofing of the present utility model;

[0019] Figure 3 is a schematic diagram of joint waterproofing of the shield segments in the present utility model;

[0020] Figure 4 is a schematic diagram of the installation of the waterstop at the construction joint of the secondary lining in the present utility model;

[0021] Figure 5 is a schematic diagram of drainage of the present utility model;

[0022] Among them:

[0023] 1 Waterproof zone 2 Grouting waterproof ring behind the segment wall

[0024] 3 Shield segment 4 Secondary lining

[0025] 5 Circumferential construction joint of the secondary lining 6 Waterstop at the construction joint of the secondary lining

[0026] 7 Secondary lining arch foot 8 Segment ring joint

[0027] 9 Gasket groove 10 Caulking groove

[0028] 11 Segment joint gasket 12 Segment caulking seal strip

[0029] 13 Longitudinal drainage blind pipe behind the secondary lining 14 Tunnel inner drainage ditch

[0030] 15 Built-in drainage groove 16 Check valve lip-shaped protrusion

[0031] 17 Swallowtail wingspan 18 Embedded and sealed end of the waterproof waterstop

[0032] 19 Anchor body. Specific embodiments

[0033] Hereinafter, the present utility model will be described in detail with reference to the accompanying drawings and embodiments:

[0034] As Figures 1 to 5 shown, a waterproof system for a double-layer lining shield tunnel structure includes a shield segment 3 and a secondary lining 4 in the tunnel. The shield segment 3 and the secondary lining 4 are longitudinally arranged along the tunnel to form a waterproof partition 1. Each waterproof partition 1 is provided with a drainage component. A waterstop for the secondary lining construction joint 6 is laid between the shield segment 3 and the secondary lining 4, thereby establishing a compartmentalized waterproof partition.

[0035] The length of the waterproof partition 1 is the one-time pouring length of the secondary lining 4.

[0036] The waterstop for the secondary lining construction joint 6 is arranged outside the circumferential construction joint 5 of the secondary lining.

[0037] The waterproof partition 1 includes a segment joint waterproof structure and a drainage component.

[0038] The segment end waterproof structure includes a joint sealing structure and a caulking sealing structure.

[0039] The joint sealing structure is a segment joint gasket 11. Sealing gasket grooves 9 are formed on the butting end faces of the shield segments 3. The segment joint gasket 11 is arranged in the sealing gasket grooves 9, and the corresponding segment joint gaskets 11 are extruded and sealed.

[0040] The caulking sealing structure is a segment caulking seal strip 12. The adjacent shield segments 3 enclose to form a caulking groove 10. The segment caulking seal strip 12 is arranged in the caulking groove 10.

[0041] A built-in drainage groove 15 is formed in the segment caulking seal strip 12. The drainage component includes the segment caulking seal strip 12 and a longitudinal drainage blind pipe 13.

[0042] The segment caulking sealing strip 12 communicates with the longitudinal drainage blind pipe 13 behind the secondary lining, and the end of the longitudinal drainage blind pipe 13 behind the secondary lining is connected to the drainage ditch in the tunnel.

[0043] Specifically, as Figure 1 described, the free end of the longitudinal drainage blind pipe 13 behind the secondary lining communicates with the drainage ditch 14 in the tunnel, thereby forming a drainage structure for draining water from the segment caulking sealing strip 12 to the drainage ditch 14 in the tunnel.

[0044] Specifically, during the process of assembling the shield segments 3 into a ring, a segment ring joint 8 is formed, and during the construction process of the secondary lining 4, a circumferential construction joint 5 of the secondary lining is formed.

[0045] Specifically, a segment joint gasket 11 is formed at the end of the shield segment 3.

[0046] Specifically, the longitudinal drainage blind pipe 13 behind the secondary lining is arranged at the position of the arch foot 7 of the secondary lining.

[0047] Specifically, as Figure 2 shown, in the longitudinal direction of the tunnel, the waterproof partition 1 takes the one-time pouring length of the secondary lining 4 as the partition unit. During the construction process of the secondary lining 4, a circumferential construction joint 5 of the secondary lining is formed, and a waterstop belt 6 for the construction joint of the secondary lining is laid outside the circumferential construction joint 5 of the secondary lining to establish a compartmentalized waterproof partition.

[0048] Specifically, segment joint gaskets 11 and segment caulking sealing strips 12 are arranged between the shield segments 3. The joint waterproofing of the shield segments 3 is formed by the segment joint gaskets 11 and the segment caulking sealing strips 12.

[0049] Specifically, the circumferential construction joint 5 of the secondary lining is arranged in alignment with the segment ring joint 8, and a waterstop belt 6 for the construction joint of the secondary lining is installed between the two layers of linings at the corresponding positions.

[0050] Specifically, as Figure 3 shown, the gasket groove 9 at the end of the shield segment 3 is an open groove with an open end larger than the bottom end. A segment joint gasket 11 is arranged in each gasket groove 9, and the segment joint gaskets 11 between the shield segments 3 correspond to each other, and the corresponding segment joint gaskets 11 are extruded to form a seal.

[0051] Specifically, the caulking groove 10 is formed by the butt joint of the broken line grooves at the ends of the shield segments 3. The caulking groove 10 communicates with the inner side of the shield segment 3, and the caulking groove 10 after butt joint is in a reduced opening shape with the bottom larger than the communication port.

[0052] Specifically, the segment caulking sealing strip 12 is arranged in the caulking groove 10 after butt joint.

[0053] Specifically, the segment caulking seal strip 12 includes a caulking end and a fixing end. The caulking end is inserted into the caulking groove 10. An internal drainage groove 15 is provided in the caulking end. A check-valve lip-shaped protrusion 16 is arranged on the outer wall of the caulking end. The check-valve lip-shaped protrusion 16 is a single-sided double-channel protrusion, thereby preventing the caulking end from slipping out of the caulking groove 10. The fixing end is provided with a dovetail wing 17. The dovetail wing 17 is arc-shaped and can cover the communication port of the caulking groove 10.

[0054] Specifically, as Figure 4 shown, the dovetail wing 17 of the segment caulking seal strip 12 is pressed by the waterstop strip 6 at the secondary lining construction joint. The waterstop strip 6 at the secondary lining construction joint includes a waterproof and waterstop strip embedding and sealing end 18 fixed to the secondary lining 4. An anchor body 19 is arranged on the back of the waterproof and waterstop strip embedding and sealing end 18. The anchor body 19 is embedded in the concrete of the secondary lining 4.

[0055] Specifically, as Figure 5 shown, the longitudinal drainage blind pipe 13 behind the secondary lining is arranged in the secondary lining 4 and is arc-shaped, thereby avoiding the waterstop strip 6 at the secondary lining construction joint. The longitudinal drainage blind pipes 13 are arranged at both ends of each waterproof zone 1.

[0056] Specifically, the longitudinal drainage blind pipe 13 behind the secondary lining is located at the secondary lining arch foot 7 of the contact surface between the shield segment 3 and the secondary lining 4. The length of the drainage pipe matches the length of the waterproof zone. The end of the longitudinal drainage blind pipe 13 behind the secondary lining is connected to the tunnel inner drainage ditch 14.

[0057] The utility model establishes a waterproof system for the double-layer lining structure of the shield tunnel with the principle of "prevention first, combination of prevention and drainage, and zone response".

[0058] The utility model solves the waterproof problem of the shield tunnel structure in a high water pressure environment, avoids the longitudinal flow of water leakage at the segment joints behind the secondary lining, realizes the zonal management of the tunnel structure waterproofing, and better conducts the structural waterproofing control.

Claims

1. A double-layer lining shield tunnel structure waterproofing system, comprising a shield tunnel segment (3) and a secondary lining (4), characterized in that: The shield segments (3) and the secondary lining (4) are provided with waterproof partitions (1) along the longitudinal direction of the tunnel, and a drainage assembly is provided in each waterproof partition (1). A secondary lining construction joint water stop (6) is laid between the shield segments (3) and the secondary lining (4), thereby establishing compartment-type waterproof partitions; The waterproof partition (1) comprises a pipe segment joint waterproof structure and a drainage assembly; The pipe segment joint waterproof structure comprises a joint sealing structure and a caulking sealing structure; The caulking sealing structure is a segment caulking sealing strip (12), adjacent shield segments (3) are enclosed to form a caulking groove (10), and the segment caulking sealing strip (12) is arranged in the caulking groove (10); A built-in drainage groove (15) is formed in the pipe segment caulking sealing strip (12), and the drainage assembly comprises a pipe segment caulking sealing strip (12) and a longitudinal drainage blind pipe (13); The pipe segment caulking sealing strip (12) comprises a caulking end and a fixed end. The caulking end is inserted into the caulking groove (10). The caulking end is provided with a built-in drainage groove (15). A non-returnable lip-shaped protrusion (16) is provided on the outer wall of the caulking end. The non-returnable lip-shaped protrusion (16) is a single-sided double-channel protrusion, thereby preventing the caulking end from sliding out of the caulking groove (10). The fixed end is provided with a dovetail-shaped wing span (17). The dovetail-shaped wing span (17) is in an arc shape and can cover the connecting opening of the caulking groove (10).

2. A double-layer lining shield tunnel structure waterproof system according to claim 1, characterized in that: The length of the waterproof partition (1) is the length of the first pouring of the secondary lining (4).

3. A double-layer lining shield tunnel structure waterproofing system according to claim 1, characterized in that: The secondary lining construction joint water stop strip (6) is arranged outside the secondary lining annular construction joint (5).

4. A double-layer lining shield tunnel structure waterproofing system according to claim 1, characterized in that: The joint sealing structure is a segment joint sealing gasket (11), the butted end faces of the shield segments (3) are both formed with sealing gasket grooves (9), the sealing gasket grooves (9) are provided with segment joint sealing gaskets (11), and the corresponding segment joint sealing gaskets (11) are squeezed and sealed.

5. The double-layer lining shield tunnel structure waterproofing system according to claim 1, characterized in that: The segment caulking sealing strip (12) is connected to a longitudinal drainage blind pipe (13) behind the secondary lining, and the end of the longitudinal drainage blind pipe (13) behind the secondary lining is connected to a drainage ditch in the tunnel.

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