Waterproof and drainage structure in tunnel

Abstract

The utility model discloses a waterproof and drainage structure in a tunnel, which comprises annular and longitudinal deformation joints arranged on an open cut tunnel lining of the tunnel, a middle-buried water stop belt is arranged in the middle of one side of the downstream face of the deformation joint, a foam plastic plate is arranged in the deformation joint above the water stop belt, and a back-attached water stop belt, a drainage plate, a composite waterproof plate and a cement mortar protection layer are sequentially arranged above one end of the upstream face of the deformation joint. The middle-buried water-stop belt comprises an annular water-stop belt and a longitudinal water-stop belt, and the annular water-stop belt and the longitudinal water-stop belt are arranged corresponding to the annular direction and the longitudinal direction of the tunnel respectively. According to the utility model, the embedded waterstop is arranged in the deformation joint, the two sides are mounted through the steel plates, and the inside and the outside are blocked through the foam plastic plates, so that double mounting is facilitated; through the arrangement of the back sticking type water stop belt and the drainage plate, local key water prevention and drainage can be carried out at the deformation joint; and through the arrangement of the composite waterproof plate, comprehensive water prevention is facilitated, and therefore multiple waterproof and drainage ways at the deformation joint are formed.

Description

Technical Field

[0001] The utility model belongs to the technical field of waterproofing in tunnels, and particularly relates to a waterproof and drainage structure in a tunnel. Background Art

[0002] During tunnel construction, expansion joints are often set on the lining to ensure that there is space for the subsequent shrinkage and deformation of the concrete. Waterstops need to be set at the expansion joints to ensure the waterproofness of the structure. Existing tunnel expansion joints usually use embedded waterstops. In the initial construction stage of the tunnel, the waterstop is pre-buried in the concrete structure and installed using steel bars, clamps, etc. However, this installation method relies on the quality of the construction, and if the construction is improper or the installation is not firm, it may cause the waterstop to fall off, crack or leak. Furthermore, expansion joints are prone to water leakage, and the use of only one waterstop measure cannot meet the waterproofing requirements in areas with many karst fissures. Utility Model Content

[0003] The utility model provides a heat-insulating curtain wall node structure, which is used to solve the technical problems of setting and installing the buried water stop belt in the tunnel and multiple waterproof settings.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A tunnel drainage structure, comprising circumferential and longitudinal expansion joints arranged on the tunnel open hole lining, wherein a buried water stop is arranged in the middle of the expansion joint on the back water side, a foam plastic board is arranged inside the expansion joint above the water stop, and a back-sticking water stop, a drainage board, a composite waterproof board and a cement mortar protective layer are arranged in sequence above one end of the expansion joint on the front water side;

[0006] The embedded waterstop includes an annular waterstop and a longitudinal waterstop, and the annular waterstop and the longitudinal waterstop are respectively arranged in the annular direction and the longitudinal direction of the tunnel;

[0007] The back-sticking waterstop is vertically symmetrically arranged on both sides of the deformation joint.

[0008] Furthermore, the embedded waterstop is a steel-edged rubber waterstop, which includes a rubber belt arranged in a "J" shape and a steel plate extending into the lining. The rubber belt has a U-shaped opening in the deformation joint with one side facing the back water surface, and two horizontal edges extending into the horizontal steel plates in the back water lining and fixedly connected.

[0009] Furthermore, the width of the embedded waterstop is not less than 350 mm, and the length of the horizontal steel plate on each side is not less than twice the width of the embedded waterstop.

[0010] Furthermore, the foam plastic plate is also filled in the deformation joint within the back water surface lining section and filled with polysparse sealing paste at a position away from the top surface of the hole.

[0011] Furthermore, a quick-setting rubber asphalt waterproof coating is provided between the back-sticking water stop strip and the drainage board, and the thickness of the quick-setting rubber asphalt waterproof coating is not less than 2.5 mm.

[0012] Furthermore, the drainage board is a convex shell type drainage board, the width of which is greater than the back-sticking water stop strip and is symmetrically arranged vertically in the deformation joint.

[0013] Furthermore, the composite waterproof board comprises an EVA waterproof board and a geotextile, and the EVA waterproof board is self-adhesive and has a thickness of not less than 2.0 mm.

[0014] Furthermore, a cement mortar protective layer is provided on one side of the lining facing the water, and rammed earth and stone are also provided on the outer side thereof; and the thickness of the cement mortar protective layer is not less than 3 mm.

[0015] The beneficial effects of the utility model are embodied in:

[0016] 1) The utility model sets the embedded water stop in the deformation joint, installs the two sides with steel plates and seals the inside and outside with foam plastic plates, which is conducive to double installation;

[0017] 2) The utility model can provide local drainage protection at the deformation joint by setting the back-sticking water stop and the drainage board;

[0018] 3) The utility model is conducive to comprehensive waterproofing of the tunnel lining by setting up the composite waterproof board, thereby forming multiple drainage channels at the deformation joints;

[0019] Other features and advantages of the utility model will be described in the subsequent description, and in part will become apparent from the description, or be understood by implementing the utility model; the main purpose and other advantages of the utility model can be realized and obtained through the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the drainage structure in the tunnel;

[0021] Figure 2 This is a schematic diagram of the distribution of embedded waterstop.

[0022] Figure numerals: 1-back water surface lining, 2-deformation joint, 3-buried waterstop, 31-annular waterstop, 32-longitudinal waterstop, 4-foam plastic board, 5-back waterstop, 6-drainage board, 7-composite waterproof board, 8-cement mortar protective layer, 9-front water surface lining. DETAILED DESCRIPTION

[0023] Take the construction of a railway tunnel as an example. The project is a dark excavation tunnel plus an open hole. The groundwater is well developed and has serious corrosiveness. The second lining of the tunnel is made of waterproof concrete, and a buried water stop installation structure is set on the second lining.

[0024] The embedded waterstop installation structure includes circumferential and longitudinal expansion joints 2 arranged on the tunnel open hole lining, an embedded waterstop 3 is arranged in the middle of the expansion joint 2 on the back water side, a foam plastic board 4 is arranged inside the expansion joint 2 above the waterstop, and a back-sticked waterstop 5, a drainage board 6, a composite waterproof board and a cement mortar protective layer 8 are arranged in sequence above the end of the expansion joint 2 facing the water.

[0025] In this embodiment, the buried water stop 3 includes an annular water stop 31 and a longitudinal water stop 32, which are respectively arranged in the annular direction and the longitudinal direction of the tunnel; the back-attached water stop 5 is vertically symmetrically arranged on both sides of the deformation joint 2. The foam plastic board 4 is also filled in the deformation joint 2 at the back water surface lining 1 and is filled with polysparse sealing paste at the top surface of the hole.

[0026] In this embodiment, the embedded waterstop 3 is a steel-edge rubber waterstop, which includes a rubber belt arranged in a "J" shape and a steel plate extending into the lining. The rubber belt is U-shaped in the deformation joint 2, with one side facing the backwater surface, and the two horizontal sides extending into the horizontal steel plate in the backwater lining and fixedly connected. The width of the embedded waterstop 3 is not less than 350mm, and the length of the horizontal steel plate on each side is not less than twice the width of the embedded waterstop 3.

[0027] In this embodiment, a quick-setting rubber asphalt waterproof coating is also provided between the back-sticking water stop strip 5 and the drain board 6, and the thickness of the quick-setting rubber asphalt waterproof coating is not less than 2.5 mm. The drain board 6 is a PE convex shell type drain board 6, which is wider than the back-sticking water stop strip 5 and is symmetrically arranged vertically to the deformation joint 2.

[0028] In this embodiment, the composite waterproof board includes a 2 mm thick self-adhesive EVA waterproof board and a 400 g / m 2 Geotextile. A cement mortar protective layer 8 is provided on one side of the water-facing lining 9, and rammed earth and stone are also provided on the outside thereof; and the thickness of the cement mortar protective layer 8 is not less than 3 mm.

[0029] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field thinks of within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A tunnel drainage structure, characterized in that: The invention comprises circumferential and longitudinal deformation joints (2) arranged on the tunnel open hole lining, wherein the deformation joint (2) is provided with a buried water stop strip (3) in the middle of the back water side, a foam plastic board (4) is arranged inside the deformation joint (2) above the water stop strip, and a back-sticking water stop strip (5), a drainage board (6), a composite waterproof board and a cement mortar protective layer (8) are arranged in sequence above the end of the deformation joint (2) facing the water side; The embedded waterstop (3) comprises an annular waterstop (31) and a longitudinal waterstop (32), wherein the annular waterstop (31) and the longitudinal waterstop (32) are arranged corresponding to the annular direction and the longitudinal direction of the tunnel respectively; The back-sticking water stop strips (5) are vertically symmetrically arranged on both sides of the deformation joint (2); The embedded waterstop (3) is a steel-edged rubber waterstop, comprising a rubber belt arranged in a "J" shape and a steel plate extending into the lining, wherein the rubber belt has a U-shaped opening in the deformation joint (2) with one side facing the backwater surface, and two horizontal sides extending into the horizontal steel plate in the backwater lining and fixedly connected.

2. A tunnel drainage structure according to claim 1, characterized in that: The width of the embedded waterstop (3) is not less than 350 mm, and the length of the horizontal steel plate on each side is not less than twice the width of the embedded waterstop (3).

3. The tunnel drainage structure according to claim 1, characterized in that: The foam plastic plate (4) is also filled in the deformation joint (2) at the back water surface lining (1) section and is filled with polysparse sealing paste at a position away from the top surface of the hole.

4. The tunnel drainage structure according to claim 1, characterized in that: A quick-setting rubber asphalt waterproof coating is also provided between the back-sticking water stop strip (5) and the drainage board (6), and the thickness of the quick-setting rubber asphalt waterproof coating is not less than 2.5 mm.

5. The tunnel drainage structure according to claim 1, characterized in that: The drainage board (6) is a convex shell-type drainage board (6), which is wider than the back-sticking water stop strip (5) and is symmetrically arranged in the vertical direction of the deformation joint (2).

6. The tunnel drainage structure according to claim 1, characterized in that: The composite waterproof board comprises an EVA waterproof board and a geotextile. The EVA waterproof board is self-adhesive and has a thickness of not less than 2.0 mm.

7. The tunnel drainage structure according to claim 1, characterized in that: A cement mortar protective layer (8) is provided on one side of the water-facing lining (9), and rammed earth and stone are also provided on the outer side thereof; and the thickness of the cement mortar protective layer (8) is not less than 3 mm.

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