Tunnel side wall geotextile covering and tightly-attaching clamp

Abstract

The utility model discloses a tunnel side wall geotextile covering and tightly-attaching clamp which aims at solving the problems that in the prior art, geotextile attaching is not tight, and the tunnel side wall is prone to uneven stress and cracking. Comprising a main support assembly, a pressing plate assembly and an adjustable fixing assembly. The main support assembly is detachably fixed to the tunnel side wall, and the wall covering geotechnical cloth is arranged on the surface of the main support assembly. The pressing plate assemblies are distributed in multiple sets and connected with the main support assembly through the adjustable fixing assembly, and the pressing ends of the pressing plate assemblies make contact with the surface of the wall covering geotechnical cloth. The geotechnical cloth is tightly attached to the tunnel side wall, water evaporation and stress concentration are effectively prevented, and the waterproof performance and the structural stability of the tunnel side wall are improved. The device is simple in structure, convenient to operate, high in adaptability, low in maintenance cost and wide in application prospect.

Description

Technical Field

[0001] This utility model relates to an auxiliary equipment for civil engineering construction, and more particularly to a geotextile covering and fastening clamp for tunnel sidewalls. Background Technology

[0002] For cut-and-cover tunnel projects, the sidewalls are a key component of the tunnel lining structure, and their concrete curing and waterproofing effects directly affect the overall quality, service life, and operational safety of the tunnel. Geotextile fabric is often laid on the inner surface of the sidewalls.

[0003] On the one hand, ensuring the geotextile adheres tightly to the sidewall surface is a crucial construction step in concrete curing. A tight fit effectively slows moisture evaporation, contributing to the steady increase of concrete strength. Poor adhesion leads to rapid moisture loss from the concrete surface, and under the influence of humidity and temperature gradients, uneven shrinkage can easily cause cracks, weakening the sidewall's load-bearing capacity and durability, posing a safety hazard to tunnel operation. On the other hand, as a key pre-support for the subsequent construction of the composite waterproofing system using waterproofing membranes, the integrity of the geotextile itself is paramount. Damage to it will have a significant adverse impact on the overall waterproofing effectiveness.

[0004] Current methods for fixing geotextile to the inner sidewalls of tunnels have the following drawbacks: nailing and shims can easily damage the geotextile and lead to loosening over time; expansion bolts, while secure, can damage the sidewall structure during drilling and are slow to install; adhesive bonding is highly dependent on environmental and substrate conditions, resulting in slow bond strength development, poor water resistance, high operational difficulty, and challenging maintenance; hot-melt welding is limited to specific materials, has high equipment costs, and requires stringent technical expertise. Therefore, ensuring a tight and undamaged fit of the geotextile to the tunnel sidewall is a critical technical challenge that urgently needs to be overcome in tunnel construction. Summary of the Invention

[0005] The purpose of this utility model is to provide a geotextile covering and fastening clamp for tunnel sidewalls.

[0006] To achieve the above objectives, this utility model is implemented according to the following technical solution:

[0007] This utility model includes a main support assembly, a pressure plate assembly, and an adjustable fixing assembly. The main support assembly is detachably and fixedly installed on one side of the tunnel sidewall. The surface of the tunnel sidewall on which the main support assembly is installed is covered with a geotextile. There are multiple pressure plate assemblies, and each set of pressure plate assemblies is connected to the main support assembly through a set of adjustable fixing assemblies. The pressing end of the pressure plate assembly is in contact with the surface of the geotextile.

[0008] Furthermore, the main support assembly includes a column support rod, a top horizontal tie rod, a horizontal tie rod fixing nail, and a ground nail. The upper end of the column support rod is detachably and fixedly connected to one end of the top horizontal tie rod, and the lower end of the other end of the top horizontal tie rod is fixedly connected to the upper end of the horizontal tie rod fixing nail. The lower end of the horizontal tie rod fixing nail is fixed to the upper end of the tunnel sidewall. The ground nail is fixedly installed at the lower end of the column support rod and fixed to the ground. Multiple sets of pressure plate assemblies and adjustable fixing assemblies are provided in the middle section of the column support rod.

[0009] The adjustable fixing assembly includes a column slot, a column locking screw, a pressure plate support rod sleeve, and a pressure plate support rod locking screw. The column slot has a U-shaped structure, and the column support rod is located inside the column slot. The column locking screw passes through one side of the column slot and is threaded to one side of the column slot. The end of the column locking screw can contact the outer wall of the column support rod. The pressure plate support rod sleeve is located on one side of the column slot, and the pressure plate support rod locking screw passes through one side of the pressure plate support rod sleeve. The pressure plate support rod locking screw is threaded to the pressure plate support rod sleeve, and the pressure plate support rod sleeve is connected to the pressure plate assembly.

[0010] The pressure plate assembly includes a pressure plate support rod and a pressure plate. One end of the pressure plate support rod is vertically and fixedly connected to the middle section of the pressure plate. The other end of the pressure plate support rod passes through the pressure plate support rod sleeve and can slide. The end of the pressure plate support rod locking screw can contact the outer wall of the pressure plate support rod.

[0011] The beneficial effects of this utility model are:

[0012] This utility model is a geotextile covering and fastening clamp for tunnel sidewalls. Compared with the prior art, this utility model has the following advantages:

[0013] Tight fit: The geotextile is tightly fitted to the tunnel sidewall by the combined use of the main support assembly, pressure plate assembly and adjustable fixing assembly to prevent moisture evaporation and stress concentration.

[0014] Structural stability: The main support assembly is detachably fixed to one side of the tunnel sidewall, which improves the stability and reliability of the structure.

[0015] Easy to operate: The adjustable fixing design of the pressure plate assembly allows construction personnel to adjust the position and pressure of the pressure plate according to actual needs, making operation simple and improving construction efficiency.

[0016] High adaptability: This utility model can flexibly set the number and position of the column support rods according to the area and shape of the tunnel sidewall, and has strong adaptability.

[0017] Easy maintenance: Due to the detachable structure, maintaining and replacing geotextiles becomes more convenient, reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of one side of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the other side of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the main support assembly and pressure plate assembly of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of this utility model in its application state;

[0022] Figure 5 This is a schematic diagram of the other side of the structure in the application state of this utility model.

[0023] In the diagram: 1. Column support rod, 2. Top horizontal tie rod, 3. Column fixing nail, 4. Column locking screw, 5. Pressure plate support rod sleeve, 6. Pressure plate support rod, 7. Pressure plate support rod locking screw, 8. Pressure plate, 9. Ground nail, 10. Tunnel sidewall, 11. Covering geotextile, 12. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0025] like Figure 1-5 As shown: This utility model includes a main support assembly, a pressure plate assembly, and an adjustable fixing assembly. The main support assembly is detachably and fixedly installed on one side of the tunnel sidewall 11. The surface of the tunnel sidewall 11 where the main support assembly is installed is covered with a geotextile 12. There are multiple sets of pressure plate assemblies, and each set of pressure plate assemblies is connected to the main support assembly through a set of adjustable fixing assemblies. The pressing end of the pressure plate assembly is in contact with the surface of the geotextile 12.

[0026] Furthermore, the main support assembly includes a column support rod 1, a top horizontal tie rod 2, a horizontal tie rod fixing nail 3, and a ground nail 10. One upper end of the column support rod 1 is detachably and fixedly connected to one end of the top horizontal tie rod 2. The lower side of the other end of the top horizontal tie rod 2 is fixedly connected to the upper end of the horizontal tie rod fixing nail 3. The lower end of the horizontal tie rod fixing nail 3 is fixed to the upper end of the tunnel sidewall 11. The ground nail 10 is fixedly installed at the lower end of the column support rod 1 and is fixed to the ground. Multiple sets of pressure plate assemblies and adjustable fixing assemblies are provided in the middle section of the column support rod 1. The top horizontal tie rod 2 and the horizontal tie rod fixing nail 3 can be fixed in any way, depending on the actual site conditions, to achieve the same technical effect. For example, fixing the top to a fixed structure such as scaffolding or beams is acceptable. The column support rod 1 can adopt a multi-segment plug-in type, telescopic type, or other structures that allow for height adjustment to adapt to different height requirements.

[0027] The adjustable fixing assembly includes a column slot 4, a column locking screw 5, a pressure plate support rod sleeve 6, and a pressure plate support rod locking screw 8. The column slot 4 has a U-shaped structure, and the column support rod 1 is located inside the column slot 4. The column locking screw 5 is inserted through one side of the column slot 4 and is threadedly connected to one side of the column slot 4. The end of the column locking screw 5 can contact the outer wall of the column support rod 1. The pressure plate support rod sleeve 6 is located on one side of the column slot 4, and the pressure plate support rod locking screw 8 is inserted through one side of the pressure plate support rod sleeve 6 and is threadedly connected to the pressure plate support rod sleeve 6. The pressure plate support rod sleeve 6 is connected to the pressure plate assembly.

[0028] The pressure plate assembly includes a pressure plate support rod 7 and a pressure plate 9. One end of the pressure plate support rod 7 is vertically and fixedly connected to the middle section of the pressure plate 9. The other end of the pressure plate support rod 7 passes through the pressure plate support rod sleeve 6 and can slide. The end of the pressure plate support rod locking screw 8 can contact the outer wall of the pressure plate support rod 7.

[0029] The working principle of this utility model is as follows:

[0030] In use of this utility model, after cement construction of the tunnel sidewall 11, cover it with geotextile 12 and sprinkle water for moisture retention. The upper end of the column support rod 1 is fixed to the upper end of the tunnel sidewall 11 using the top horizontal tie rod 2 and the horizontal tie rod fixing nail 3. If the top of the tunnel sidewall 11 reaches the ceiling, the top horizontal tie rod 2 and the horizontal tie rod fixing nail 3 can be removed, and the upper end of the column support rod 1 can be fixed using other fixing components, such as fixing it to scaffolding or directly fixing it to the tunnel ceiling. The lower end of the column support rod 1 is fixed to the ground using ground nails 10. The number of column support rods 1 is determined according to the area size. At this time, the column slot 4 is inserted into the inner side of the column support rod 1 at the required pressing position. After adjusting the upper and lower positions of the column slot 4, the column locking screw 5 is locked to fix the column slot 4 on the column support rod 1. The pressure plate support rod locking screw 8 is loosened, and the pressure plate support rod 7 is adjusted to slide in the pressure plate support rod sleeve 6. After pressing the pressure plate 9 and the geotextile covering 12, the pressure plate support rod locking screw 8 is locked to fix the pressure plate support rod 7, and the construction is completed. Multiple pressure plate components can be set on the column support rod 1 according to actual needs.

[0031] In addition, a spraying device, water pump, timer switch, etc. can be added to the upper part of the column support rod 1 to automatically spray at timed intervals to keep the geotextile covering 12 moist and maintain the tunnel sidewall 11.

[0032] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A geotextile covering and fastening clamp for tunnel sidewalls, characterized in that: The system includes a main support assembly, a pressure plate assembly, and an adjustable fixing assembly. The main support assembly is detachably and fixedly installed on one side of the tunnel sidewall (11). The surface of the tunnel sidewall (11) where the main support assembly is installed is covered with a geotextile (12). There are multiple pressure plate assemblies, and each set of pressure plate assemblies is connected to the main support assembly through one set of the adjustable fixing assembly. The pressing end of the pressure plate assembly is in contact with the surface of the geotextile (12).

2. The geotextile covering and close-fitting clamp for tunnel sidewalls according to claim 1, characterized in that: The main support assembly includes a column support rod (1), a top horizontal tie rod (2), a horizontal tie rod fixing nail (3), and a ground nail (10). The upper end of the column support rod (1) is detachably and fixedly connected to one end of the top horizontal tie rod (2). The lower end of the other end of the top horizontal tie rod (2) is fixedly connected to the upper end of the horizontal tie rod fixing nail (3). The lower end of the horizontal tie rod fixing nail (3) is fixed to the upper end of the tunnel sidewall (11). The ground nail (10) is fixedly installed at the lower end of the column support rod (1) and fixed to the ground. Multiple sets of pressure plate assemblies and adjustable fixing assemblies are provided in the middle section of the column support rod (1).

3. The geotextile covering and close-fitting clamp for tunnel sidewalls according to claim 2, characterized in that: The adjustable fixing assembly includes a column slot (4), a column locking screw (5), a pressure plate support rod sleeve (6), and a pressure plate support rod locking screw (8). The column slot (4) has a U-shaped structure. The column support rod (1) is located in the column slot (4). The column locking screw (5) is inserted through one side of the column slot (4). The column locking screw (5) is threaded to one side of the column slot (4). The end of the column locking screw (5) can contact the outer wall of the column support rod (1). The pressure plate support rod sleeve (6) is located on one side of the column slot (4). The pressure plate support rod locking screw (8) is inserted through one side of the pressure plate support rod sleeve (6). The pressure plate support rod locking screw (8) is threaded to the pressure plate support rod sleeve (6). The pressure plate support rod sleeve (6) is connected to the pressure plate assembly.

4. The geotextile covering and close-fitting clamp for tunnel sidewalls according to claim 3, characterized in that: The pressure plate assembly includes a pressure plate support rod (7) and a pressure plate (9). One end of the pressure plate support rod (7) is vertically fixed to the middle section of the pressure plate (9). The other end of the pressure plate support rod (7) passes through the pressure plate support rod sleeve (6) and can slide. The end of the pressure plate support rod locking screw (8) can contact the outer wall of the pressure plate support rod (7).

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