Prestressed anchor rod reinforced surrounding rock structure for large-section tunnel of high-speed rail

Abstract

The utility model belongs to the technical field of tunnel construction, and particularly relates to a prestressed anchor rod reinforced surrounding rock structure for a large-section tunnel of a high-speed rail, which comprises a steel arch and anchor rods, the top of the steel arch is connected with a reinforced top plate, and the side wall of the steel arch is connected with a reinforced side plate. Corresponding fixing holes are formed in the side walls of the steel arch, the reinforcing top plate and the reinforcing side plates, in the actual construction process of the high-speed rail tunnel, surrounding rock can be conveniently and effectively supported and fixed, the overall stability is improved, therefore, the surrounding rock is prevented from being greatly deformed, the construction safety is guaranteed, and the construction progress is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a prestressed anchor rod reinforced surrounding rock structure of a high-speed railway large-section tunnel. Background Art

[0002] With the rapid development of high-speed rail construction in my country, deep buried tunnel projects have gradually emerged and increased. When tunnels pass through high-altitude stress areas, faults, and encounter weak surrounding rocks, large deformations of the weak surrounding rocks often occur.

[0003] In the existing technology, during the actual construction of high-speed railway tunnels, the surrounding rock is prone to loosening and deformation, and it is impossible to effectively reinforce the surrounding rock, which affects the construction progress and poses a huge safety risk. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above-mentioned and / or existing problems in existing tunnel construction, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a prestressed anchor rod reinforced surrounding rock structure for a high-speed railway large-section tunnel, which can effectively support and fix the surrounding rock during the actual construction of the high-speed railway tunnel, increase the overall stability, thereby preventing large deformation of the surrounding rock, ensuring construction safety, and thus improving construction progress.

[0007] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0008] A prestressed anchor rod reinforced surrounding rock structure for a large-section tunnel of a high-speed railway comprises a steel arch frame and anchor rods, wherein the top of the steel arch frame is connected to a reinforced top plate, the side walls of the steel arch frame are connected to reinforced side plates, the side walls of the steel arch frame, the reinforced top plate and the reinforced side plates are all provided with corresponding fixing holes, the anchor rods are arranged in the fixing holes, a drill bit is arranged at one end of the anchor rod, a filling cavity is arranged in the anchor rod, and the side walls of the anchor rod are provided with a plurality of grouting holes.

[0009] As a preferred solution for reinforcing the surrounding rock structure of a high-speed railway large-section tunnel with prestressed anchor rods described in the utility model, the inner walls of the two reinforced side panels are connected with a first positioning frame and a second positioning frame, the first positioning frame and the second positioning frame are staggered, and the steel arch frame is arranged between the first positioning frame and the second positioning frame.

[0010] As a preferred solution for reinforcing the surrounding rock structure of a high-speed railway large-section tunnel prestressed anchor rod described in the utility model, one end of the anchor rod is provided with a thread, and the side wall of the anchor rod is connected to a bolt through the thread.

[0011] As a preferred solution for reinforcing the surrounding rock structure of a high-speed railway large-section tunnel prestressed anchor rod described in the utility model, a support seat is provided at the bottom of the reinforced side plate, and the support seat is welded to the bottom of the reinforced side plate.

[0012] As a preferred solution for reinforcing the surrounding rock structure of a high-speed railway large-section tunnel with prestressed anchor rods described in the utility model, the grouting hole is connected to the filling cavity.

[0013] As a preferred solution for reinforcing the surrounding rock structure of a high-speed railway large-section tunnel with prestressed anchor rods described in the utility model, the reinforced top plate is arc-shaped, and the reinforced top plate and reinforced side plates are fitted and connected to the side walls of the steel arch frame.

[0014] As a preferred solution for reinforcing the surrounding rock structure of a high-speed railway large-section tunnel with prestressed anchor rods described in the utility model, there are a plurality of fixing holes.

[0015] Compared with the prior art: In the present application document, 1. the sizes of the reinforced top plate and the reinforced side plates are pre-set according to the size of the tunnel, the reinforced top plate and the reinforced side plates are conveniently reinforced on the surface of the surrounding rock, the steel arch frame is convenient for supporting and positioning the reinforced top plate and the reinforced side plates, and at the same time it also plays a supporting role for the tunnel, enhancing the stability of the reinforced top plate and the reinforced side plates fixed on the surrounding rock of the tunnel, the fixing holes are convenient for installing anchor rods, the anchor rods are inserted into the rock mass of the tunnel through the anchor rod drill bit, the surrounding rock is conveniently broken through the drill bit, and the anchor rods are convenient for drilling into the surrounding rock to obtain effective reinforcement, the filling cavity is convenient for filling with anchoring agents such as cement mortar, and the grouting holes are discharged to the anchor rods and the surrounding rock. In the gaps between the rocks, the bonding force is used to bond the anchor rod to the rock wall, thereby improving the stability of the rock mass and achieving the reinforcement effect of the anchor rod. Therefore, in the actual construction process of the high-speed railway tunnel, it is convenient to effectively support and fix the surrounding rock to increase the overall stability, thereby preventing large deformation of the surrounding rock, ensuring construction safety, and thus improving the construction progress. 2. The first positioning frame and the second positioning frame are convenient for connecting and supporting the reinforced side panels on both sides to prevent deformation of the bottom of the reinforced side panels and provide effective supporting force. At the same time, the first positioning frame and the second positioning frame are convenient for positioning the steel arch frame to prevent displacement and improve the support stability of the steel arch frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0017] Figure 1 This is a schematic diagram of the structure of a high-speed railway large-section tunnel prestressed anchor rod reinforced surrounding rock structure of the utility model;

[0018] Figure 2 This is a structural explosion diagram of a high-speed railway large-section tunnel prestressed anchor rod reinforced surrounding rock structure of the utility model;

[0019] Figure 3 This is a structural cross-sectional view of a high-speed railway large-section tunnel prestressed anchor rod reinforced surrounding rock structure of the utility model;

[0020] Figure 4 This is a schematic diagram of a first positioning frame for reinforcing the surrounding rock structure of a high-speed railway large-section tunnel with prestressed anchor rods according to the utility model.

[0021] In the figure: 100 steel arch frame, 110 reinforced top plate, 120 reinforced side plate, 130 fixing hole, 200 anchor rod, 210 drill bit, 220 filling cavity, 230 grouting hole, 300 first positioning frame, 310 second positioning frame, 400 thread, 410 bolt, 500 support seat. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0024] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0026] The utility model provides a high-speed railway large-section tunnel prestressed anchor reinforcement surrounding rock structure, please refer to Figure 1-Figure 4 , including a steel arch frame 100 and an anchor rod 200, the top of the steel arch frame 100 is connected to a reinforced top plate 110, the side wall of the steel arch frame 100 is connected to a reinforced side plate 120, the side walls of the steel arch frame 100, the reinforced top plate 110 and the reinforced side plate 120 are all provided with corresponding fixing holes 130, the anchor rod 200 is embedded and installed in the fixing hole 130, a drill bit 210 is fixedly installed at one end of the anchor rod 200, a filling cavity 220 is provided in the anchor rod 200, and a plurality of grouting holes 230 are provided in the side wall of the anchor rod 200. Specifically, the reinforced top plate 110 and the reinforced side plate 120 are conveniently reinforced on the surrounding rock surface, and the steel arch frame 100 is convenient for the reinforced top plate 110 and the reinforced side plate 1 The anchor 20 is supported and positioned, and at the same time, it also plays a supporting role for the tunnel, thereby enhancing the stability of the reinforcement top plate 110 and the reinforcement side plate 120 fixed on the tunnel surrounding rock. The fixing hole 130 is convenient for installing the anchor rod 200, and the anchor rod 200 is inserted into the rock mass of the tunnel through the drill bit 210 of the anchor rod 200. The drill bit 210 is convenient for crushing the surrounding rock, and the anchor rod 200 is convenient for drilling into the surrounding rock to be effectively reinforced. The filling cavity 220 is convenient for filling anchoring agents such as cement mortar, which are discharged into the gap between the anchor rod 200 and the rock through the grouting hole 230, and the anchor rod 200 is bonded to the rock wall by its bonding force, thereby improving the stability of the rock mass and achieving the reinforcement effect of the anchor rod 200.

[0027] One end of the anchor rod 200 is provided with a thread 400, and the side wall of the anchor rod 200 is connected with a bolt 410 through the thread 400. Specifically, the bolt 410 improves the anchoring force, reduces the risk caused by the loosening of the anchor rod 200, and ensures the normal use of the anchor rod 200.

[0028] A support seat 500 is provided at the bottom of the reinforced side plate 120, and the support seat 500 is welded to the bottom of the reinforced side plate 120. Specifically, the support seat 500 is used to support and position the bottom of the reinforced structure, which is convenient for fixing.

[0029] The grouting hole 230 is in communication with the filling cavity 220 , and specifically, it is convenient for the anchoring agent to flow through the filling cavity 220 and the grouting hole 230 , so that the anchoring agent can enter the side wall of the rock and be fixed conveniently.

[0030] The reinforced top plate 110 is arc-shaped, and the reinforced top plate 110 and the reinforced side plates 120 are closely connected to the side walls of the steel arch frame 100 . Specifically, the steel arch frame 100 is in close contact with the reinforced top plate 110 and the reinforced side plates 120 , which is convenient for support.

[0031] A plurality of fixing holes 130 are provided, specifically, to facilitate multi-directional fixing of the steel arch frame 100 and improve the overall stability.

[0032] Combination Figure 1-Figure 4 The specific use process of the prestressed anchor rod reinforced surrounding rock structure of a high-speed railway large-section tunnel in this embodiment is as follows: during the actual construction of the high-speed railway tunnel, the sizes of the reinforced top plate 110 and the reinforced side plate 120 are pre-set according to the tunnel size. First, the reinforced top plate 110 and the reinforced side plate 120 are reinforced on the surrounding rock surface, and the steel arch frame 100 is used to support and position the reinforced top plate 110 and the reinforced side plate 120, while also supporting the tunnel, thereby enhancing the stability of the reinforced top plate 110 and the reinforced side plate 120 fixed on the tunnel surrounding rock. , using anchor rod 200, the anchor rod 200 is inserted into the rock mass of the tunnel through the fixing hole 130 by the drill bit 210 of the anchor rod 200, the surrounding rock is easily broken by the drill bit 210, and the anchor rod 200 is convenient to drill into the surrounding rock for effective reinforcement, and the anchoring agent is transported into the filling cavity 220 and discharged into the gap between the anchor rod 200 and the rock through the grouting hole 230. The anchor rod 200 is bonded to the rock wall by its bonding force, thereby improving the stability of the rock mass and achieving the reinforcement effect of the anchor rod 200, which can be applicable to the construction of large-section subway tunnels.

[0033] Figure 4 The schematic diagram of the second embodiment of the utility model is a prestressed anchor rod reinforcement surrounding rock structure for a high-speed railway large-section tunnel. Figure 4 , which is different from the above-mentioned embodiment, the inner walls of the two reinforced side panels 120 are connected with the first positioning frame 300 and the second positioning frame 310, the first positioning frame 300 and the second positioning frame 310 are arranged alternately, and the steel arch frame 100 is arranged between the first positioning frame 300 and the second positioning frame 310. Specifically, the first positioning frame 300 and the second positioning frame 310 are convenient for connecting and supporting the reinforced side panels 120 on both sides, preventing the bottom of the reinforced side panels 120 from deforming and providing effective supporting force. At the same time, the first positioning frame 300 and the second positioning frame 310 are convenient for positioning the steel arch frame 100 to prevent displacement and improve the supporting stability of the steel arch frame 100.

[0034] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high-speed railway large-section tunnel prestressed anchor reinforcement surrounding rock structure, characterized in that: The invention comprises a steel arch frame (100) and an anchor rod (200), wherein the top of the steel arch frame (100) is connected to a reinforced top plate (110), the side wall of the steel arch frame (100) is connected to a reinforced side plate (120), the side walls of the steel arch frame (100), the reinforced top plate (110) and the reinforced side plate (120) are all provided with corresponding fixing holes (130), the anchor rod (200) is arranged in the fixing hole (130), a drill bit (210) is arranged at one end of the anchor rod (200), a filling cavity (220) is arranged in the anchor rod (200), and the side wall of the anchor rod (200) is provided with a plurality of grouting holes (230).

2. According to claim 1, a high-speed railway large-section tunnel prestressed anchor reinforcement surrounding rock structure is characterized by: The inner side walls of the two reinforced side panels (120) are connected with a first positioning frame (300) and a second positioning frame (310), the first positioning frame (300) and the second positioning frame (310) are arranged alternately, and the steel arch frame (100) is arranged between the first positioning frame (300) and the second positioning frame (310).

3. The high-speed railway large-section tunnel prestressed anchor reinforcement surrounding rock structure according to claim 1, characterized in that: One end of the anchor rod (200) is provided with a thread (400), and a side wall of the anchor rod (200) is connected with a bolt (410) via the thread (400).

4. The high-speed railway large-section tunnel prestressed anchor reinforcement surrounding rock structure according to claim 1, characterized in that: A support seat (500) is provided at the bottom of the reinforced side plate (120), and the support seat (500) is welded to the bottom of the reinforced side plate (120).

5. The high-speed railway large-section tunnel prestressed anchor reinforcement surrounding rock structure according to claim 1, characterized in that: The grouting hole (230) is in communication with the filling cavity (220).

6. The high-speed railway large-section tunnel prestressed anchor reinforcement surrounding rock structure according to claim 1, characterized in that: The reinforced top plate (110) is arc-shaped, and the reinforced top plate (110) and the reinforced side plates (120) are closely connected to the side walls of the steel arch frame (100).

7. The high-speed railway large-section tunnel prestressed anchor reinforcement surrounding rock structure according to claim 1, characterized in that: A plurality of fixing holes (130) are provided.

Images