A tunnel portal support structure

Abstract

The utility model discloses a tunnel arch support structure, including multiple groups steel arch, a plurality of longitudinal connecting rod mechanism, a plurality of steel arches are along the tunnel longitudinal interval arrangement, a plurality of longitudinal connecting rod mechanism set up between multiple groups steel arch, longitudinal connecting rod mechanism is by longitudinal link, the connecting assembly of symmetrical setting is composed, longitudinal connecting rod mechanism in the utility model is used for connecting multiple groups steel arch, and its advantage lies in adopting the screw thread rotation link mode of connecting assembly, can realize the quick accurate assembly and split between multiple groups steel arch, and the construction efficiency is greatly promoted, simultaneously, the evenness of connecting strength and pretightening force can be ensured to the screw connection, makes multiple groups steel arch form the integral support system of stable, effectively disperses the surrounding rock pressure, strengthens structural stability, and does not need to rely on manual welding, has reduced the operation difficulty and construction risk, and the convenience and reliability are given full play to.

Description

Technical Field

[0001] This utility model belongs to the field of tunnel support technology, specifically relating to a tunnel arch support structure. Background Technology

[0002] The tunnel arch support structure is a key support system for ensuring the stability of the surrounding rock during tunnel construction. It is usually composed of multiple steel arch frames, each of which includes an arch crown section and a sidewall section. They are connected as a whole by longitudinal connecting rods. It can effectively bear and disperse the pressure of the surrounding rock, prevent tunnel collapse, and is suitable for different geological conditions. During construction, it needs to be precisely assembled to ensure that all components are firmly connected. It is combined with processes such as shotcrete and anchoring to form a composite support, providing safety assurance for tunnel excavation and operation.

[0003] In traditional construction, the connection between multiple sets of steel arch frames and multiple rods often relies on manual welding or bolts. Manual welding and bolt installation are cumbersome, time-consuming and labor-intensive, affecting the efficiency of assembling and disassembling the arch support structure. To address this issue, this utility model proposes a tunnel arch support structure. Utility Model Content

[0004] The purpose of this utility model is to provide a tunnel arch support structure to solve the problem of time-consuming and labor-intensive assembly of the arch support structure mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tunnel arch support structure, comprising multiple sets of steel arch frames and multiple longitudinal connecting rod mechanisms. The multiple steel arch frames are arranged at intervals along the longitudinal direction of the tunnel, and the multiple longitudinal connecting rod mechanisms are arranged between the multiple sets of steel arch frames. The longitudinal connecting rod mechanism consists of longitudinal rods and symmetrically arranged connecting components, with the symmetrically arranged connecting components located at both ends of the longitudinal rods.

[0006] Preferably, the connecting assembly consists of a connecting seat, a connecting sleeve, and a limiting component. The connecting seat is disposed on the surface of the steel arch frame, the end of the longitudinal rod is fitted with the end of the connecting seat, the connecting sleeve is sleeved on the surface of the mating area between the connecting seat and the longitudinal rod, and the limiting component is disposed on the inner wall of the connecting sleeve and the end surface of the longitudinal rod.

[0007] Preferably, the cross-sectional dimensions of the connecting seat are the same as those of the longitudinal rod.

[0008] Preferably, the limiting component consists of a limiting annular seat and a limiting annular groove. The limiting annular groove is formed on the inner wall of the connecting sleeve, and the limiting annular seat is sleeved on the surface of the longitudinal rod and located inside the limiting annular groove.

[0009] Preferably, the inner wall of the limiting annular seat is fixed to the surface of the longitudinal rod.

[0010] Preferably, the steel arch frame is composed of symmetrically arranged side wall sections and symmetrically arranged arch top sections, with the symmetrically arranged arch top sections respectively located on top of the symmetrically arranged side wall sections.

[0011] Preferably, multiple bolts are used at the connection points between the symmetrically arranged side wall sections and the symmetrically arranged arch sections.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The longitudinal connecting rod mechanism in this invention is used to connect multiple sets of steel arch frames. Its advantage lies in the use of threaded rotary connection of the connecting components, which enables rapid and accurate assembly and disassembly of multiple sets of steel arch frames, greatly improving construction efficiency. At the same time, the threaded connection ensures the uniformity of connection strength and preload, enabling multiple sets of steel arch frames to form a stable overall support system, effectively dispersing the surrounding rock pressure, enhancing structural stability, and eliminating the need for manual welding, thus reducing operational difficulty and construction risks, and balancing convenience and reliability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the steel arch frame structure of this utility model; Figure 3 This utility model Figure 1 Enlarged schematic diagram of region A in the diagram; Figure 4 This is a cross-sectional schematic diagram of the connecting component of this utility model; In the diagram: 1. Steel arch frame; 11. Side wall section; 12. Arch top section; 2. Longitudinal connecting rod mechanism; 21. Longitudinal rod; 22. Connecting component; 221. Connecting seat; 222. Connecting sleeve; 223. Limiting component; 2231. Limiting ring seat; 2232. Limiting ring groove. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1 to 4This utility model provides a technical solution: a tunnel arch support structure, including multiple sets of steel arch frames 1 and multiple longitudinal connecting rod mechanisms 2. The multiple steel arch frames 1 are arranged at intervals along the longitudinal direction of the tunnel, and the multiple longitudinal connecting rod mechanisms 2 are arranged between the multiple sets of steel arch frames 1. Each longitudinal connecting rod mechanism 2 consists of a longitudinal rod 21 and symmetrically arranged connecting components 22. The symmetrically arranged connecting components 22 are located at both ends of the longitudinal rod 21. The longitudinal connecting rod mechanisms 2 are used to connect the multiple sets of steel arch frames 1, linking the dispersed steel arch frames 1 into a unified support system, enhancing the integrity and stability of the structure, and enabling the multiple arch frames to... The components can jointly withstand the pressure of the surrounding rock, preventing excessive stress and deformation of a single arch frame. The connecting assembly 22 consists of a connecting seat 221, a connecting sleeve 222, and a limiting assembly 223. The connecting seat 221 is set on the surface of the steel arch frame 1, and the end of the longitudinal rod 21 is fitted with the end of the connecting seat 221. The connecting sleeve 222 is sleeved on the surface of the joint between the connecting seat 221 and the longitudinal rod 21. The limiting assembly 223 is set on the inner wall of the connecting sleeve 222 and the end surface of the longitudinal rod 21. The cross-sectional dimensions of the connecting seat 221 are the same as those of the longitudinal rod 21. The limiting assembly 223 consists of a limiting ring seat. The steel arch frame 1 consists of symmetrically arranged sidewall sections 11 and symmetrically arranged arch top sections 12. The symmetrically arranged arch top sections 12 are respectively set on the top of the symmetrically arranged sidewall sections 11. The steel arch frame 1 is the core load-bearing component of the entire support structure, and is composed of the sidewall sections 11 and the arch top sections 12 forming an arched structure. The main function of the structure is to bear the pressure of the surrounding rock of the tunnel, prevent the tunnel from collapsing, and provide basic structural support for tunnel excavation and operation. The symmetrically arranged sidewall section 11 and the symmetrically arranged arch section 12 are connected by multiple bolts. The sidewall section 11 is a component of the steel arch frame 1, is vertically arranged, and is fixed to the tunnel floor foundation at the bottom. It mainly bears the pressure of the surrounding rock in the tunnel sidewall area and maintains the stability of the sidewall. The arch section 12 is a component of the steel arch frame 1, is arc-shaped, and mainly bears the pressure of the surrounding rock in the tunnel arch area, evenly distributing the pressure to the sidewall section 11 to prevent the arch from collapsing.

[0016] The working principle and usage process of this utility model are as follows: During the assembly of the tunnel arch support structure, the arch top section 12 and the side wall section 11 are first spliced ​​together to form a complete steel arch frame 1, ensuring a firm connection at the splice. The first set of steel arch frames 1 is then installed, and the assembled first set of steel arch frames 1 is positioned, with the bottom of its side wall section 11 fixed to the tunnel floor foundation. Then, the longitudinal connecting rod mechanism 2 is connected, and the longitudinal rod 21 is connected to the corresponding part of the side wall section 11 of the first set of steel arch frames 1 via the connecting component 22, so that the end of the longitudinal rod 21 is connected to the connecting component. The end of the seat 221 is fitted together, and then the connecting sleeve 222 located on the surface of the longitudinal rod 21 is rotated so that the thread of the connecting sleeve 222 rotates on the surface of the connecting seat 221, thereby achieving the fastening of the longitudinal rod 21 and the connecting seat 221. At the same time, the limiting component 223 ensures that the connection position is accurate. Then, the subsequent steel arch frame 1 is installed in sequence according to the above steps, and is connected to the installed steel arch frame 1 through the longitudinal rod 21 of the longitudinal connecting rod mechanism 2 and the connecting component 22, so that multiple sets of steel arch frames 1 form an integral support system.

[0017] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tunnel arch support structure, comprising multiple sets of steel arch frames (1) and multiple longitudinal connecting rod mechanisms (2), characterized in that: Multiple steel arch frames (1) are arranged at intervals along the longitudinal direction of the tunnel, and multiple longitudinal connecting rod mechanisms (2) are set between multiple sets of steel arch frames (1). The longitudinal connecting rod mechanism (2) consists of a longitudinal rod (21) and symmetrically arranged connecting components (22). The symmetrically arranged connecting components (22) are located at both ends of the longitudinal rod (21).

2. The tunnel arch support structure according to claim 1, characterized in that: The connecting assembly (22) consists of a connecting seat (221), a connecting sleeve (222), and a limiting assembly (223). The connecting seat (221) is disposed on the surface of the steel arch frame (1). The end of the longitudinal rod (21) is fitted with the end of the connecting seat (221). The connecting sleeve (222) is sleeved on the surface of the joint between the connecting seat (221) and the longitudinal rod (21). The limiting assembly (223) is disposed on the inner wall of the connecting sleeve (222) and the end surface of the longitudinal rod (21).

3. The tunnel arch support structure according to claim 2, characterized in that: The cross-sectional dimensions of the connecting seat (221) are the same as those of the longitudinal rod (21).

4. A tunnel arch support structure according to claim 2, characterized in that: The limiting component (223) consists of a limiting annular seat (2231) and a limiting annular groove (2232). The limiting annular groove (2232) is opened on the inner wall of the connecting sleeve (222). The limiting annular seat (2231) is sleeved on the surface of the longitudinal rod (21) and located inside the limiting annular groove (2232).

5. A tunnel arch support structure according to claim 4, characterized in that: The inner wall of the limiting ring seat (2231) is fixed to the surface of the longitudinal rod (21).

6. A tunnel arch support structure according to claim 1, characterized in that: The steel arch frame (1) is composed of symmetrically arranged side wall sections (11) and symmetrically arranged arch top sections (12), with the symmetrically arranged arch top sections (12) respectively located on the top of the symmetrically arranged side wall sections (11).

7. A tunnel arch support structure according to claim 6, characterized in that: Multiple bolts pass through the connection points of the symmetrically arranged side wall sections (11) and the symmetrically arranged arch sections (12).

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