Advanced drainage support plate for soft rock tunnel surrounding rock construction reinforcement
By designing a leading drainage support plate for soft rock tunnels, problems such as large deformation of soft rocks and water influx and mud in soft rock tunnel construction are solved, and the effect of drying tunnel construction environment and reducing construction costs is achieved.
Patent Information
- Application Number
- CN202421862068.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-02
AI Technical Summary
During the construction of soft rock tunnels, there are risks such as large deformation of soft rock, water gushing and mud, and high external water pressure. The traditional support structure has a large lining thickness and a large excavation area, resulting in high construction costs.
A leading drainage support plate is designed, including a curved top plate, symmetrically installed side plate, through PVC pipe, curved limit groove and anti-slip tripod. Directed drainage is achieved through the design of PVC pipe and limit groove, and combined with the anti-slip tripod to improve support stability.
The tunnel dry construction environment is realized, the external water pressure in the initial support process is reduced, the lining thickness and excavation range are reduced, and the construction cost is reduced.
Smart Images
Figure CN223035023U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tunnel excavation support, and particularly relates to a pre-drainage support plate for construction reinforcement of surrounding rocks of soft rock tunnels. Background Art
[0002] In the construction of Section 2 of Liujia Village Tunnel in the Chuxiong Section of the Middle Route Project of Yunnan Midstream Water Diversion Project, the tunnel passes through a sewage storage layer mainly composed of soft rock in the Midstream Red Bed of Yunnan. During the tunnel construction process, there are risks such as large deformation of soft rock, water inrush and mud burst, and high external water pressure. During the excavation and support process, seepage water and water inrush in the rock mass can be effectively discharged through the drainage support plate, reducing the external water pressure on the support structure. The lining thickness of the traditional reinforced concrete tunnel support structure is relatively large. In order to meet the internal contour clearance, the excavation area is often large. The application of this device can ensure a dry construction environment for the tunnel, save the precipitation cost, replace the traditional support, reduce the lining thickness, thereby reducing the excavation range and the cost of excavation and construction. Based on the purpose of supporting stability and reducing water pressure to achieve rapid drainage, a pre-drainage support plate for construction reinforcement of surrounding rocks of soft rock tunnels is designed and provided. Content of the Utility Model
[0003] The purpose of the utility model is to provide a pre-drainage support plate for construction reinforcement of surrounding rocks of soft rock tunnels.
[0004] The utility model adopts the following technical scheme:
[0005] A pre-drainage support plate for construction reinforcement of surrounding rocks of soft rock tunnels includes an arc-shaped top plate. Two side plates are symmetrically installed at both ends of the top plate. The top plate includes an inner top plate and an outer top plate. A number of PVC pipes penetrate through the outer top plate. An arc-shaped first limiting groove is arranged along the PVC pipes on the top surface of the inner top plate. A number of second limiting grooves are arranged on the outer side of the side plates. The first limiting groove is communicated with the second limiting groove. A number of anti-slip foot frames are rotatably connected to the bottom surface of the side plates.
[0006] Furthermore, the inner top plate and the outer top plate are fixedly connected by bolts.
[0007] Furthermore, the diameter of the PVC pipe is 50 mm and the row spacing is 3 m.
[0008] Furthermore, a PVC capillary drainage belt is laid between the PVC pipes on the surface of the outer top plate.
[0009] Furthermore, the anti-slip foot frame is of a rectangular structure. Anti-slip teeth are welded to the bottom surface of the anti-slip foot frame. A U-shaped cover is rotatably connected to the end of the anti-slip foot frame. An anti-slip cone welded to the end of the anti-slip tooth and inclined downward is arranged inside the U-shaped cover.
[0010] The beneficial effects of the utility model are as follows:
[0011] 1. The utility model adopts a double-layer top surface superposition and fixation design, sets PCV pipes for drainage at the outer top plate, opens a first limit groove for drainage at the inner top plate, uses side plates to support the top plate to complete the support of the tunnel, realizes directional drainage, and adds PVC capillary drainage belts according to the rock and soil structure of the tunnel to increase the rapid drainage at the multi-water section, maintain a dry construction environment for the tunnel, and reduce the external water pressure during the initial support process.
[0012] 2. The side plates of the utility model jack up the top plate and support the side wall of the tunnel, and anti-slip foot frames are installed at the bottom of the side plates to increase the sliding resistance, thereby improving the fixing effect of the side plates.
[0013] 3. In the utility model, the anti-slip foot frame is movably connected to the bottom of the side plate. When adjusting its horizontal placement, the anti-slip teeth welded to its bottom surface are used to increase the sliding friction force, and the anti-slip cones obliquely arranged at its ends contact the ground. When there is a position deviation, they will insert into the ground to increase the resistance. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a schematic front view structure diagram of the whole of the utility model;
[0015] Figure 2 is a schematic diagram of the overall structure after the inner top plate and the outer top plate of the utility model are disassembled;
[0016] Figure 3 is a schematic diagram of the structure of the anti-slip foot frame of the utility model placed flat;
[0017] Figure 4 is a schematic diagram of the structure of the anti-slip foot frame of the utility model retracted;
[0018] Figure 5 is a schematic diagram of the overall structure of the utility model after installing the PVC capillary drainage belt;
[0019] Wherein: 1 - top plate; 101 - inner top plate; 102 - outer top plate; 103 - PVC pipe; 104 - first limit groove; 105 - PVC capillary drainage belt; 2 - side plate; 201 - second limit groove; 3 - anti-slip foot frame; 301 - anti-slip teeth; 302 - U-shaped cover; 303 - anti-slip cone. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments.
[0021] Embodiment
[0022] Please refer to Figures 1-5, An advanced drainage support plate for the construction reinforcement of surrounding rock in soft rock tunnels, including a top plate 1 and side plates 2. The top plate 1 includes an inner top plate 101 and an outer top plate 102. A plurality of PVC pipes 103 are installed through the outer top plate 102. An arc-shaped first limiting groove 104 is opened along the PVC pipes 103 on the top surface of the inner top plate 101; two side plates 2 are symmetrically installed below both ends of the top plate 1, and a plurality of second limiting grooves 201 are evenly opened on the outer side of the side plates 2; a plurality of anti-slip foot brackets 3 are rotatably connected to the bottom surface of the side plates 2.
[0023] The inner top plate 101 and the outer top plate 102 are fixedly connected by bolts.
[0024] The first limiting groove 104 communicates with the second limiting groove 201.
[0025] The anti-slip foot bracket 3 is of a rectangular structure. Anti-slip teeth 301 are welded to the bottom surface of the anti-slip foot bracket 3. A U-shaped cover 302 is rotatably connected to the end of the anti-slip foot bracket 3. An anti-slip cone 303 that is welded to the end of the anti-slip teeth 301 and inclines downward is covered inside the U-shaped cover 302.
[0026] The utility model uses the connection of the top plate 1 and the side plates 2 to support the lined tunnel section, and uses the PVC pipes 103 for drainage during support.
[0027] The top plate 1 is arranged by superimposing and connecting the inner top plate 101 and the outer top plate 102. The PVC pipes 103 are installed on the outer top plate 102 and protrude upward to directly drain water by contacting the lined tunnel. The first limiting groove 104 is installed on the inner top plate 101 and communicates with the PVC pipes 103 for drainage. Similarly, the second limiting groove 201 that communicates with the first limiting groove 104 is opened on the outer side of the side plates 2.
[0028] When supporting the hard rock flat pressure tunnel section, the diameter of the PVC pipes 103 is 50 mm, the row spacing of the PVC pipes 103 is 3 m, the PVC pipes 103 are distributed in the 110° range of the arch crown and are arranged in a staggered pattern of 4 / 3 roots per row.
[0029] When supporting the muddy rock or the tunnel section passing through the fault, the diameter of the PVC pipes 103 is 50 mm, the row spacing of the PVC pipes 103 is 3 m, the PVC pipes 103 are distributed in the 110° range of the arch crown, and a PVC capillary drainage belt 105 is laid in the 110° range of the arch crown to promote drainage.
[0030] In the utility model, the anti-slip foot bracket 3 is movably connected to the bottom of the side plate 2. When adjusting its horizontal placement, the anti-slip teeth 301 welded to its bottom surface are used to increase the sliding friction. When the anti-slip cone 303 inclined at its end contacts the ground, it will insert into the ground to increase the resistance when there is a position offset.
[0031] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.
Claims
1. An advanced drainage support plate for reinforcement of surrounding rock in soft rock tunnel construction, characterized in that: The invention comprises an arc-shaped top plate (1), two side plates (2) are symmetrically mounted at both ends of the top plate (1), the top plate (1) comprises an inner top plate (101) and an outer top plate (102), a plurality of PVC pipes (103) are penetrated through the outer top plate (102), a first arc-shaped limiting groove (104) is arranged on the top surface of the inner top plate (101) along the PVC pipes (103), a plurality of second limiting grooves (201) are arranged on the outer side of the side plate (2), the first limiting grooves (104) are connected to the second limiting grooves (201), and a plurality of anti-slip footrests (3) are rotatably connected to the bottom surface of the side plate (2).
2. The advanced drainage support plate for soft rock tunnel surrounding rock construction reinforcement according to claim 1 is characterized by: The inner top plate (101) and the outer top plate (102) are fixedly connected by bolts.
3. The advanced drainage support plate for soft rock tunnel surrounding rock construction reinforcement according to claim 1 is characterized by: The diameter of the PVC pipe (103) is 50 mm, and the row spacing is 3 m.
4. The advanced drainage support plate for soft rock tunnel surrounding rock construction reinforcement according to claim 1 is characterized in that: A PVC capillary drainage tape (105) is laid between the PVC pipes (103) on the surface of the outer top plate (102).
5. The advanced drainage support plate for soft rock tunnel surrounding rock construction reinforcement according to claim 1 is characterized in that: The anti-skid foot frame (3) is a rectangular structure, the bottom surface of the anti-skid foot frame (3) is welded with anti-skid teeth (301), the end of the anti-skid foot frame (2) is rotatably connected to a U-shaped cover (302), and the inside of the U-shaped cover (302) is provided with an anti-skid cone (303) welded to the end of the anti-skid teeth (301) and tilted downward.