A clamp capable of clamping with a longitudinal drainage blind pipe

Abstract

The utility model relates to tunnel initial support technical field discloses a kind of fixture capable of and longitudinal drainage blind pipe clamping, applied to tunnel initial support, comprising: fixed part, installation in initial support;Water guide groove, fixed part is close to the side wall of initial support and is spaced apart to be equipped with multiple water guide grooves;Clamping part, it is located in the bottom of fixed part, clamping part has the C type clamping slot capable of clamping longitudinal drainage blind pipe, clamping slot and every water guide groove lower end intercommunication;Waterproof board, a part is arranged between initial support and fixed part and clamping part, another part is folded upwards and surrounded in the outside of fixed part and clamping part. By being equipped with water guide groove on fixed part, water guide groove can directly form stable water seepage passage, can long-term keep unobstructed water guide function, avoid drainage system failure.

Description

Technical Field

[0001] This utility model relates to the field of tunnel initial support technology, and in particular to a clamp that can be engaged with a longitudinal drainage blind pipe. Background Technology

[0002] Effective drainage of groundwater is crucial for ensuring the structural safety of tunnel projects. Currently, the prevailing groundwater drainage method is a comprehensive approach centered on water isolation, collection, and drainage. The specific scheme is as follows: First, a waterproof membrane with water-proofing function is laid between the initial tunnel support and the secondary lining (hereinafter referred to as "secondary lining") to form the first waterproof barrier, preventing groundwater from directly seeping into the secondary lining. Simultaneously, longitudinal drainage blind pipes 8 and circumferential drainage blind pipes 9 are laid in this interlayer space, working together to collect groundwater. The circumferential drainage blind pipe 9 is perforated, actively guiding seepage water from the tunnel sidewalls to the longitudinal drainage blind pipe 8. The longitudinal drainage blind pipe 8 is also perforated, receiving water from the circumferential drainage blind pipe 9 and directly collecting residual water seeping from the tunnel sidewalls. Finally, all water collected by the longitudinal drainage blind pipe 8 is drained through a connected, non-perforated drainage pipe into the side ditches or central ditch on both sides of the tunnel, completing the final drainage of groundwater. The overall layout is as follows: Figure 1 As shown.

[0003] In terms of specific construction, to ensure the independence and reliability of the drainage system, each area corresponding to the secondary lining is designed as an independent drainage unit. Within this unit, the waterproof membrane 7 needs to be wrapped around the longitudinal drainage blind pipe 5. The core purpose of this operation is to ensure that seepage water from the tunnel sidewall can accurately flow into the longitudinal drainage blind pipe 5, preventing water from stagnating in the interlayer. However, the wrapping operation has a key problem: if the waterproof membrane 7 is directly attached to the longitudinal drainage blind pipe 5, it can easily cause the blind pipe to be "sealed," blocking the seepage water from entering the channel. To solve this problem, the existing technical solution is to add a triangular no-fines precast concrete block 6 on the outside of the longitudinal drainage blind pipe 5 and between the wrapped waterproof membrane 7. The precast block provides support and reserves space for seepage water. The specific structure is as follows: Figure 2 As shown.

[0004] Although the above design can achieve basic drainage function, it still reveals several problems in practical application, specifically as follows: 1. When fixing the waterproof membrane 7 after inversion to the initial support, the fixing components need to be installed by drilling holes. This process directly damages the integrity of the waterproof membrane 7, creating potential leakage points. If the fixing point is not properly sealed, groundwater can easily seep into the secondary lining from the damaged area, affecting the safety of the tunnel structure; 2. The precast blocks need to meet both permeability and strength requirements, but there is an inherent technical contradiction between the two. If the amount of cementitious material is reduced to improve permeability, the precast blocks will be weak and easily damaged during construction or operation. If the proportion of cementitious material is increased to ensure strength, it will block the internal pores of the precast blocks, reduce permeability, and fail to meet drainage requirements. In addition, salt in the groundwater can easily crystallize in the pores of the precast blocks. Long-term accumulation will completely block the permeable channels, causing the precast blocks to lose their drainage function, and thus leading to the failure of the entire drainage system. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a clamp that can be engaged with a longitudinal drainage blind pipe.

[0006] This utility model provides a clamp that can be engaged with a longitudinal drainage blind pipe, applied to the initial support of a tunnel, comprising: a fixing member installed on the initial support; a water guide channel, wherein multiple water guide channels are spaced apart on the side wall of the fixing member near the initial support; a clamping member located at the bottom of the fixing member, the clamping member having a C-shaped groove capable of engaging the longitudinal drainage blind pipe, the groove being connected to the lower end of each water guide channel; and a waterproof membrane, partly disposed between the initial support and the fixing member and the clamping member, and the other part folded upwards to surround the outside of the fixing member and the clamping member.

[0007] Optionally, the width of the fastener gradually narrows from bottom to top, and the fastener is arranged at an angle between the sidewall near the initial support and the sidewall away from the initial support, and the angle is acute.

[0008] Optionally, the inner wall of the card slot is provided with protrusions or ridges to prevent the longitudinal drainage blind pipe from sticking to the inner wall of the card slot.

[0009] Optionally, the fasteners and snap-fit ​​components are integrally molded.

[0010] Optionally, the water channel is coated with an anti-crystallization super-slippery coating.

[0011] Optionally, a waterstop strip is provided between the top of the fastener and the initial support.

[0012] Optionally, bolts and nuts are also included. The fastener has a first countersunk hole. One end of the bolt is embedded in the initial support, and the other end passes through the first countersunk hole and is connected to the nut to fix the fastener to the initial support.

[0013] Optionally, it also includes screws, and the fastener has a second countersunk hole. One end of the screw passes through the second countersunk hole and connects with the initial support to fix the fastener to the initial support.

[0014] Optionally, it also includes expansion screws, with a third countersunk hole on the fastener, one end of which passes through the third countersunk hole and connects to the initial support to fix the fastener to the initial support.

[0015] The technical solution provided by this utility model has the following advantages compared with the prior art: 1. By setting up fasteners and clips, part of the waterproof membrane is placed between the initial support and the fasteners and clips, while the other part is folded upwards and surrounds the outside of the fasteners and clips. In this way, even if holes are drilled in the waterproof membrane and the fasteners are installed in the initial support with bolts and nuts, the leakage point is located between the fasteners and the initial support, and the fasteners are surrounded by the waterproof membrane. This fundamentally avoids the problem of potential leakage points caused by drilling damaging the integrity of the waterproof membrane, reducing the risk of groundwater seeping into the secondary lining, thereby ensuring the safety of the tunnel structure.

[0016] 2. By opening water guide channels on the fixing parts, the water guide channels can directly form stable seepage channels, maintain smooth water guiding function for a long time, avoid drainage system failure, and significantly improve the drainage capacity of the tunnel drainage system; in addition, the width and density of the water guide channels can be adjusted according to the seepage conditions of different tunnels, and the length of the fixing parts can also be customized according to the site requirements. Therefore, the clamp of this utility model can adapt to the tunnel drainage needs under different geological conditions.

[0017] 3. Since the longitudinal drainage blind pipe can be directly connected to the snap-fit ​​fitting, there is no need to install the blind pipe separately before placing the precast block, thus eliminating the complicated construction sequence in the existing technology and reducing the construction difficulty. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a structure for guiding the discharge of groundwater by setting up longitudinal and circumferential drainage blind pipes, which is provided for the background technology of this utility model.

[0019] Figure 2 A schematic diagram of the structure of the waterproof membrane wrapped around the longitudinal drainage blind pipe provided for the background technology of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of a clamp that can be engaged with a longitudinal drainage blind pipe, as provided in Embodiment 1 of this utility model.

[0021] Explanation of reference numerals in the attached drawings: 1. Fastener; 2. Water guide channel; 3. Clip-on; 31. Slot; 4. Countersunk hole; 5. Longitudinal drainage blind pipe; 6. No-fines concrete precast block; 7. Waterproof membrane; 8. Longitudinal drainage blind pipe; 9. Circumferential drainage blind pipe. Detailed Implementation

[0022] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model 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 utility model.

[0024] Example 1: like Figure 1 As shown, this embodiment provides a clamp that can be engaged with a longitudinal drainage blind pipe, applied to the initial support of a tunnel, including: a fixing member 1, installed on the initial support; water guide channels 2, with multiple water guide channels 2 spaced apart on the side wall of the fixing member 1 near the initial support; a clamping member 3, located at the bottom of the fixing member 1, the clamping member 3 having a C-shaped groove 31 capable of engaging the longitudinal drainage blind pipe, the groove 31 communicating with the lower end of each water guide channel 2; and a waterproof membrane, partly disposed between the initial support and the fixing member 1 and the clamping member 3, and the other part folded upwards to surround the outside of the fixing member 1 and the clamping member 3.

[0025] In this embodiment, the slot 31 faces the initial support.

[0026] The width of the fastener 1 gradually narrows from bottom to top. The fastener 1 is arranged at an angle between the side wall near the initial support and the side wall away from the initial support, and the angle is acute.

[0027] The inner wall of the slot 31 is provided with protrusions or ridges to prevent the longitudinal drainage blind pipe from fitting against the inner wall of the slot 31.

[0028] The fastener 1 and the snap-fit ​​3 are integrally formed.

[0029] In this embodiment, the fastener 1 and the snap-fit ​​3 may be made of plastic material.

[0030] The water guide channel 2 is coated with an anti-crystallization super-slippery coating.

[0031] In this embodiment, the anti-crystallization super-slippery coating is prior art, such as the anti-crystallization super-slippery coating, preparation method and application of a tunnel drainage system disclosed in application publication number CN118126626A.

[0032] A waterstop strip is provided between the top of the fastener 1 and the initial support.

[0033] Because the initial support is uneven, a waterstop strip is installed between the top of the fastener 1 and the initial support. The flexibility of the waterstop strip compensates for the unevenness of the initial support and completely prevents water from seeping into the drainage system.

[0034] In this embodiment, bolts and nuts are also included. The fastener 1 is provided with a first countersunk hole. One end of the bolt is embedded in the initial support, and the other end passes through the first countersunk hole and is connected to the nut to fix the fastener 1 to the initial support. After the nut and bolt are connected, the whole is located in the first countersunk hole.

[0035] In this embodiment, the countersunk hole 4 includes a first countersunk hole, a second countersunk hole, and a third countersunk hole, the size of which is adapted to the nut, screw, and expansion screw.

[0036] In other embodiments, screws can be used instead of bolts and nuts. The fastener 1 is provided with a second countersunk hole. One end of the screw passes through the second countersunk hole and connects with the initial support to fix the fastener 1 to the initial support.

[0037] In other embodiments, expansion screws can be used instead of bolts and nuts. The fastener 1 is provided with a third countersunk hole. One end of the expansion screw passes through the third countersunk hole and connects with the initial support to fix the fastener 1 to the initial support.

[0038] Working principle: In actual construction, the reverse edge of the waterproof membrane is first applied. That is, the part of the waterproof membrane between the initial support and the fixing part 1 and the snap-fit ​​part 3 is first placed on the initial support. Then, the longitudinal drainage blind pipe 8 is snapped onto the snap-fit ​​part 3. Then, the bolt is inserted into the first countersunk hole. Then, the clamp is installed on the initial support by the cooperation of the nut and the bolt. Then, the waterproof membrane is folded upward so that part of the waterproof membrane surrounds the outside of the fixing part 1 and the snap-fit ​​part 3. Then, the waterproof membrane is welded so that this part of the waterproof membrane surrounds the fixing part 1 and the snap-fit ​​part 3.

[0039] The above embodiments of the utility model are only a few specific embodiments of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A clamp capable of engaging with a longitudinal drainage blind pipe, used in the initial support of a tunnel, characterized in that, include: Fastener (1), installed on the initial support; Water guide channel (2), fastener (1) Multiple water guide channels (2) are opened at intervals on the side wall near the initial support; A snap-fit ​​component (3) is provided at the bottom of the fixing component (1). The snap-fit ​​component (3) has a C-shaped slot (31) that can snap onto the longitudinal drainage blind pipe (8). The slot (31) is connected to the lower end of each water guide channel (2). The waterproof membrane is partially placed between the initial support and the fixing member (1) and the snap-fit ​​member (3), and the other part is folded up and surrounded on the outside of the fixing member (1) and the snap-fit ​​member (3).

2. The clamp as described in claim 1, capable of engaging with a longitudinal drainage blind pipe, characterized in that, The width of the fastener (1) gradually narrows from bottom to top. The fastener (1) is arranged at an angle between the side wall near the initial support and the side wall away from the initial support, and the angle is acute.

3. The clamp as described in claim 1, capable of engaging with a longitudinal drainage blind pipe, characterized in that, The inner wall of the slot (31) is provided with protrusions or ridges to prevent the longitudinal drainage blind pipe from fitting against the inner wall of the slot (31).

4. The clamp as described in claim 1, capable of engaging with a longitudinal drainage blind pipe, characterized in that, The fastener (1) and the snap-fit ​​(3) are integrally formed.

5. The clamp as described in claim 1, capable of engaging with a longitudinal drainage blind pipe, characterized in that, The water guide channel (2) is coated with an anti-crystallization super-slippery coating.

6. The clamp as described in claim 1, capable of engaging with a longitudinal drainage blind pipe, characterized in that, A waterstop strip is provided between the top of the fastener (1) and the initial support.

7. The clamp as described in claim 1, capable of engaging with a longitudinal drainage blind pipe, characterized in that, It also includes bolts and nuts. The fastener (1) has a first countersunk hole. One end of the bolt is embedded in the initial support, and the other end passes through the first countersunk hole and is connected to the nut to fix the fastener (1) to the initial support.

8. The clamp as described in claim 1, capable of engaging with a longitudinal drainage blind pipe, characterized in that, It also includes screws. The fastener (1) has a second countersunk hole. One end of the screw passes through the second countersunk hole and connects with the initial support to fix the fastener (1) to the initial support.

9. The clamp as described in claim 1, capable of engaging with a longitudinal drainage blind pipe, characterized in that, It also includes expansion screws. The fastener (1) has a third countersunk hole. One end of the expansion screw passes through the third countersunk hole and connects with the initial support to fix the fastener (1) to the initial support.

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