Permeable blind ditch with water diversion plate for tunnel

Abstract

The utility model discloses a water-permeable blind ditch with a water diversion plate for a tunnel, which comprises a water-permeable core body, the water-permeable core body is arranged on the inner side of a tunnel primary support, the water-permeable core body comprises the water diversion plate and a variable cross-section water-permeable core body, the water diversion plate is in a flat plate shape and is tightly attached to the tunnel primary support, and the variable cross-section water-permeable core body is arranged on the inner side of the tunnel primary support. The water diversion plate enlarges the upstream face of the longitudinal drainage system of the tunnel structure, the variable cross-section permeable core body is in a thickness gradual change shape, and the variable cross-section permeable core body is located at the tunnel primary support position and attached to the longitudinal drainage blind pipe. The drainage blind ditch with the water diversion plate is adopted, so that the upstream area of the drainage blind ditch can be increased, water catchment is facilitated, and the drainage blind ditch can replace the construction process of reversely wrapping the longitudinal blind pipe and wrapping permeable geotextile and non-fine concrete and can replace similar prefabricated block-shaped permeable components.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel engineering construction, and particularly relates to a permeable blind ditch with a water diversion plate for a tunnel. Background Art

[0002] In existing tunnel construction technology, semi-waterproof tunnel longitudinal drainage blind pipes are constructed by wrapping waterproof sheets with geotextiles in reverse, then filling the envelope with sandless permeable concrete. This allows groundwater outside the tunnel to penetrate through the pores of the sandless concrete into the longitudinal drainage blind pipes, where it is collected and drained into the tunnel ditches. However, this method of backfilling the envelope with sandless concrete has drawbacks. During actual construction, the cement slurry in the sandless concrete is highly fluid and often solidifies on the surface of the longitudinal drainage blind pipes, seriously affecting their drainage effectiveness.

[0003] In addition, considering the unfavorable factors of the cast-in-place sandless concrete process, prefabricated sandless concrete blocks and drainage components of other materials are also used to fill the space left by the waterproof board above the longitudinal blind pipe; the sandless concrete blocks have high water permeability requirements and low yield rate, and the weight of a single block is large. When the blocks are fixed, they are easy to loosen when relying on the longitudinal blind pipe. The construction process is complicated and the construction quality is difficult to guarantee; when the reversed longitudinal blind pipe process is adopted, if the size of the sandless concrete block is too small, the reserved gap for the water channel between the side wall waterproof board and the fixed reversed waterproof board becomes smaller, resulting in drainage difficulties; during the construction process, the phenomenon of omitting hidden processes and not pouring sandless concrete, or not installing prefabricated structural blocks occurs, resulting in failure of the longitudinal drainage system, which ultimately affects tunnel drainage and structural stress. 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 permeable blind ditch with a water diversion plate for a tunnel.

[0005] The technical solution of the utility model is: a permeable blind ditch with a water diversion plate for a tunnel, comprising a permeable core, wherein the permeable core is arranged on the inner side of the initial support of the tunnel, the permeable core comprises a water diversion plate and a variable-section permeable core, the water diversion plate is flat and closely attached to the initial support of the tunnel, the water diversion plate increases the water-facing surface of the longitudinal drainage system of the tunnel structure, the variable-section permeable core has a gradually changing thickness, and the variable-section permeable core is at the initial support of the tunnel and is in contact with the longitudinal drainage blind pipe.

[0006] Furthermore, the water guide plate and the variable-cross-section water-permeable core are an integrally formed water-permeable core.

[0007] Furthermore, the water guide plate and the variable-section water-permeable core are water-permeable cores spliced ​​up and down.

[0008] Furthermore, the water guide plate and the variable-cross-section permeable core are transversely spliced ​​permeable cores.

[0009] Furthermore, the variable cross-section water-permeable core is a triangular water-permeable core.

[0010] Furthermore, the lower contour of the variable-section permeable core is consistent with the outer contour of the longitudinal drainage blind pipe, and the bottom of the triangular permeable core fits the shape of the longitudinal drainage blind pipe.

[0011] Furthermore, the water guide plate and the variable-section permeable core are hollow drainage bodies formed by hot-melt entanglement of polymer filaments and overlapping each other. The polymer filaments are made of PVC material and are formed into a hollow grid structure with large porosity, high strength, good durability and light weight after hot-melt entanglement processing.

[0012] Furthermore, the water diversion plate and the variable cross-section permeable core are wrapped with a filter geotextile, and the filter geotextile serves as a filter layer for drainage.

[0013] Furthermore, the initial support of the tunnel is externally coated with anti-filtration geotextile as an anti-filtration layer, and a water diversion plate and a variable-section permeable core are installed under the premise of the anti-filtration layer.

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

[0015] The utility model adopts a drainage blind ditch with a water diversion plate to increase the water-facing area of ​​the drainage blind ditch, which is conducive to water collection. The utility model can replace the construction process of wrapping the longitudinal blind pipe with permeable geotextile + sandless concrete, and can replace similar prefabricated block permeable components.

[0016] The utility model can avoid the influence of construction defects and installation defects on tunnel drainage and structural stress, has the characteristics of simple installation and quick construction, and makes the drainage channel of the tunnel structure reliable and unobstructed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a schematic diagram of the integrally formed water-permeable core in the present utility model;

[0019] Figure 3 This is a schematic diagram of a water-permeable core body in the utility model that is spliced ​​up and down;

[0020] Figure 4 This is a schematic diagram of a transversely spliced ​​water-permeable core in the present invention;

[0021] in:

[0022] 1 Permeable core 2 Longitudinal drainage blind pipe

[0023] 3 Anti-filtration geotextile 4 Tunnel waterproof board

[0024] 5 Nail 6 Tunnel initial support

[0025] 7 triangular permeable core 8 water diversion plate

[0026] 9. Turn up the waterproof board. DETAILED DESCRIPTION

[0027] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and embodiments:

[0028] like Figures 1 to 4 As shown, a permeable blind ditch with a water diversion plate for a tunnel includes a permeable core 1, which is arranged on the inner side of the initial support 6 of the tunnel. The permeable core 1 includes a water diversion plate 8 and a variable-section permeable core. The water diversion plate 8 is flat and closely attached to the initial support 6 of the tunnel. The water diversion plate 8 increases the water-facing surface of the longitudinal drainage system of the tunnel structure. The variable-section permeable core has a gradually changing thickness. The variable-section permeable core is located at the initial support 6 of the tunnel and is in contact with the longitudinal drainage blind pipe 2.

[0029] Furthermore, the water guide plate 8 and the variable-cross-section water-permeable core are an integrally formed water-permeable core.

[0030] Furthermore, the water guide plate 8 and the variable cross-section water-permeable core are water-permeable cores spliced ​​up and down.

[0031] Furthermore, the water guide plate 8 and the variable-section water-permeable core are transversely spliced ​​water-permeable cores.

[0032] Furthermore, the variable cross-section water-permeable core is a triangular water-permeable core 7 .

[0033] Furthermore, the lower contour of the variable-section permeable core is consistent with the outer contour of the longitudinal drainage blind pipe 2 , and the bottom of the triangular permeable core 7 fits the shape of the longitudinal drainage blind pipe 2 .

[0034] Furthermore, the water guide plate 8 and the variable-section permeable core are hollow drainage bodies formed by hot-melt entanglement of polymer filaments, which are overlapped with each other. The polymer filaments are made of PVC material and are formed into a hollow grid structure with large porosity, high strength, good durability and light weight after hot-melt entanglement processing.

[0035] Furthermore, the water diversion plate 8 and the variable cross-section permeable core are wrapped with a filter geotextile 3, and the filter geotextile 3 serves as a filter layer for drainage.

[0036] Furthermore, the tunnel initial support 6 is coated with an anti-filtration geotextile 3 as an anti-filtration layer, and the water diversion plate 8 and the variable-section permeable core are installed under the premise of the anti-filtration layer.

[0037] Specifically, the permeable core 1, the longitudinal drainage blind pipe 2, and the anti-filtration geotextile 3 are composed of a composite drainage blind ditch for a tunnel.

[0038] Specifically, the permeable core 1, the longitudinal drainage blind pipe 2, and the filter geotextile 3 are wrapped with a waterproof board 9, and the waterproof board 9 is fixed to the tunnel arch foot to form a longitudinal drainage system.

[0039] More specifically, the reversed waterproofing plate 9 is fixed to the tunnel initial support 6 by nailing 5 .

[0040] Specifically, the triangular size of the triangular permeable core 7 is set in combination with the size of the longitudinal drainage blind pipe 2, and the bottom edge of the triangular permeable core 7 fits the longitudinal drainage blind pipe 2; the water diversion plate 8 has a certain thickness and rigidity; the length and thickness of the water diversion plate 8 are based on the premise of not affecting the size of the tunnel lining and can meet the drainage requirements of the water-rich environment of the stratum.

[0041] Specifically, the high molecular polymer material in the water guide plate 8 and the variable cut-off water permeability core should be corrosion-resistant, lightweight, non-degradable in water and soil, and non-aging, and can permanently maintain material properties.

[0042] Specifically, such as Figure 1 As shown, the longitudinal drainage system adopts an inverted waterproof board 9 to invert the longitudinal drainage blind pipe 2 and the permeable core 1. The permeable core 1 adopts an integrated or split splicing form to achieve the expansion of the triangular area between the tunnel waterproof board 4 and the longitudinal permeable blind pipe 2, avoiding the tunnel waterproof board 4 and the inverted waterproof board 9 from fitting together, so that the groundwater outside the tunnel structure can enter the tunnel through the water channel between the tunnel waterproof board 4 and the inverted waterproof board 9 at the tunnel arch wall, and the groundwater is discharged after being collected.

[0043] Specifically, the permeable core 1 is attached to the tunnel primary support structure 6 to enlarge the water-facing channel between the tunnel waterproof board 4 and the reverse waterproof board 9.

[0044] Specifically, the tunnel longitudinal drainage system formed by the longitudinal drainage blind pipe 2 with the water diversion plate 8 and the reversed waterproof plate 9 can improve the tunnel groundwater environment.

[0045] Specifically, the permeable core 1 formed by entanglement of high molecular polymer filaments has a low mass density, and its cross-section and length of the permeable core components can be customized according to the tunnel structure, which can speed up the construction progress.

[0046] Specifically, during the construction of the longitudinal drainage blind pipe 2 with the water diversion plate 8, the technical defects, management defects, and construction quality defects during the construction of the existing longitudinal blind pipe can be avoided. The installation is simple. The longitudinal drainage blind pipe 2 with the water diversion plate is fixed by the reverse-wrapped waterproof plate 9. After the construction is completed, there are no defects such as blind ditch installation deformation, deformation, falling, floating of the longitudinal drainage blind pipe 2, and positioning failure. Example 1

[0047] like Figure 2 As shown, in this embodiment, a one-time formed permeable core 1 is used. During the construction of the one-time formed permeable core 1, an optional external anti-filtration geotextile 3 or an anti-filtration geotextile 3 is laid on the initial tunnel support 6 as an anti-filtration layer. The permeable core 1 is fixed to the initial tunnel support 6 with nails 5. A concave arc is set at the lower edge of the permeable core 1, and the permeable core 1 is engaged with the longitudinal drainage blind pipe 2 to be positioned and fixed.

[0048] Specifically, the water diversion plate 8 extending upward from the water-permeable core 1 is determined according to the size of the tunnel structure.

[0049] Specifically, the size of the permeable core 1 is determined according to the length of the tunnel lining structure template trolley to facilitate on-site construction, speed up construction progress, and improve construction efficiency. Example 2

[0050] like Figure 3 As shown, in this embodiment, the water guide plate 8 and the variable-section permeable core are upper and lower spliced ​​permeable cores, combined in a triangle and plate shape.

[0051] Specifically, during the construction of the upper and lower spliced ​​permeable cores, the upper and lower spliced ​​permeable cores are wrapped with anti-filtration geotextile 3 or the initial tunnel support 6 has been laid with anti-filtration geotextile 3 as an anti-filtration layer, and the triangular permeable core 7 is fixed to the initial tunnel support 6 with nails 5. A concave arc is set at the lower edge of the triangular permeable core 7, which is embedded and fixed with the longitudinal drainage blind pipe 2.

[0052] Specifically, after the triangular permeable core 7 is installed, the lower end of the water diversion plate 8 is connected to the top of the triangular permeable core 7, and the water diversion plate 8 is fixed on the initial support 6 of the tunnel. Example 3

[0053] like Figure 4 As shown, in this embodiment, the water guide plate 8 and the variable cross-section permeable core are transversely spliced ​​permeable cores, combined in a triangle and plate shape.

[0054] Specifically, during the construction of the transversely spliced ​​permeable core, the transversely spliced ​​permeable core is wrapped with an anti-filtration geotextile 3 or the initial tunnel support 6 has been laid with an anti-filtration geotextile 3 as an anti-filtration layer, and the water diversion plate 8 is fixed to the initial tunnel support 6 with nails 5. The lower end of the water diversion plate 8 is set to a slope angle, and the lower edge of the triangular permeable core 7 is set to a concave arc. After being engaged and positioned with the longitudinal drainage blind pipe 2, the triangular permeable core 7 is connected and fixed to the water diversion plate 8.

[0055] As a modified extension, the shapes of the triangular permeable core 7 and the water diversion plate 8 are not specific shapes and need to be set according to the tunnel structure and the pipe type of the longitudinal drainage blind pipe 2.

[0056] As a deformation extension, the water diversion plate 8 can be replaced by a plastic drainage board. The plastic drainage board needs to have a certain thickness and rigidity, and should be able to avoid the gap between the tunnel waterproof board 4 and the reverse waterproof board 9 being too small or disappearing due to defects in tunnel construction, so that the water-facing channel between the tunnel waterproof board 4 and the triangular interval at the top of the triangular permeable core 7 can be effective.

[0057] The utility model discloses a permeable blind ditch with a water diversion plate for a tunnel, which increases the gap between a tunnel waterproof plate 4 and a reverse waterproof plate 9 and integrally strengthens the drainage system of groundwater outside the original tunnel structure.

[0058] The above technical solutions only reflect the preferred technical solutions of the present utility model. Any changes that may be made to certain parts thereof by those skilled in the art all reflect the principles of the present invention and fall within the scope of protection of the present invention.

Claims

1. A permeable blind ditch with a water diversion plate for a tunnel, characterized by: The invention comprises a water-permeable core (1), wherein the water-permeable core (1) is arranged on the inner side of the tunnel initial support (6), and the water-permeable core (1) comprises a water diversion plate (8) and a variable-section water-permeable core. The water diversion plate (8) is flat and closely attached to the tunnel initial support (6). The water diversion plate (8) increases the water-facing surface of the longitudinal drainage system of the tunnel structure. The variable-section water-permeable core has a gradually changing thickness. The variable-section water-permeable core is located at the tunnel initial support (6) and is in contact with the longitudinal drainage blind pipe (2).

2. A permeable blind ditch with a water diversion plate for a tunnel according to claim 1, characterized in that: The water guide plate (8) and the variable-cross-section water-permeable core are an integrally formed water-permeable core.

3. The permeable blind ditch with a water diversion plate for a tunnel according to claim 1, characterized in that: The water guide plate (8) and the variable-section water-permeable core are upper and lower spliced ​​water-permeable cores.

4. The permeable blind ditch with a water diversion plate for a tunnel according to claim 1, characterized in that: The water guide plate (8) and the variable-cross-section water-permeable core are transversely spliced ​​water-permeable cores.

5. The permeable blind ditch with a water diversion plate for a tunnel according to claim 1, characterized in that: The variable cross-section water-permeable core is a triangular water-permeable core (7).

6. The permeable blind ditch with a water diversion plate for a tunnel according to claim 5, characterized in that: The lower contour of the variable-section water-permeable core is consistent with the outer contour of the longitudinal drainage blind pipe (2), and the bottom of the triangular water-permeable core (7) fits the shape of the longitudinal drainage blind pipe (2).

7. The permeable blind ditch with a water diversion plate for a tunnel according to claim 1, characterized in that: The water guide plate (8) and the variable cross-section water-permeable core are hollow drainage bodies formed by hot-melt entanglement of high-molecular polymer filaments, which are overlapped with each other. The high-molecular polymer filaments are made of PVC material and are formed into a hollow grid structure with large porosity, high strength, good durability and light weight after hot-melt entanglement.

8. The permeable blind ditch with a water diversion plate for a tunnel according to claim 1, characterized in that: The water diversion plate (8) and the variable-section permeable core are wrapped with a filter geotextile (3), and the filter geotextile (3) serves as a filter layer for drainage.

9. The permeable blind ditch with a water diversion plate for a tunnel according to claim 1, characterized in that: The initial tunnel support (6) is coated with an anti-filter geotextile (3) as an anti-filter layer, and a water diversion plate (8) and a variable-section permeable core are installed under the premise of the anti-filter layer.

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