A tunnel support structure for tunnel construction

Abstract

The utility model discloses a tunnel support structure for tunnel construction, including setting on the tunnel wall reinforced frame, the reinforced frame is by multiple longitudinal reinforcement, multiple horizontal reinforcement is composed, multiple longitudinal reinforcement and multiple horizontal reinforcement crisscross with tunnel wall and is pasted, the surface of reinforced frame has poured multiple groups of concrete, and multiple groups of concrete between setting have support mechanism, through the reinforcing mechanism of design, makes the tunnel support structure in the construction process, and installs reinforcing mechanism in the tunnel ground simultaneously, and is fixed with reinforced frame and links up, and reinforcing mechanism increases the contact area of reinforced frame and soft ground, and soft bottom layer can bear greater load, prevents reinforced frame from sinking into the bottom layer, and reinforcing mechanism can make reinforced frame stress more evenly, reduces the risk of inclination or displacement caused by local excessive stress, maintains the stability of the whole tunnel support structure whole.

Description

Technical Field

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

[0002] Reinforced concrete support is an important structural reinforcement method in tunnel construction. Tunnel support can strengthen the strata, prevent ground deformation and collapse, thereby ensuring construction safety, ensuring unobstructed passage, and enhancing the structural stability of the tunnel.

[0003] In existing tunnel support structures, the steel reinforcement frame is installed first, and then concrete is poured with the help of molds. After the tunnel support structure is completed, when the bottom of the steel reinforcement frame contacts the tunnel ground where the base layer is soft, its load-bearing capacity is insufficient, making it difficult to effectively transfer and distribute these loads. This leads to a series of problems such as the steel reinforcement frame tilting and sinking, which in turn affects the stability and safety of the entire tunnel support structure. Therefore, this utility model proposes a tunnel support structure for tunnel construction. Utility Model Content

[0004] The purpose of this utility model is to provide a tunnel support structure for tunnel construction, so as to solve the problem mentioned in the background art that when the contact point between the steel frame and the tunnel ground is a soft base layer, the insufficient bearing capacity at the ground contact point affects the overall stability and safety of the tunnel support structure.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tunnel support structure for tunnel construction, comprising a steel reinforcement frame installed on the tunnel wall. The steel reinforcement frame is composed of multiple longitudinal steel bars and multiple transverse steel bars. The multiple longitudinal steel bars and multiple transverse steel bars are interwoven and attached to the tunnel wall. Multiple sets of concrete are poured on the surface of the steel reinforcement frame. A support mechanism is provided between the multiple sets of concrete. A reinforcement mechanism is provided at the bottom end of the steel reinforcement frame and inside the concrete. The reinforcement mechanism is composed of a pad and multiple fixing components. The pad penetrates through the inside of the concrete and is located at the bottom of the multiple longitudinal steel bars. The multiple fixing components are all located at the bottom of the multiple longitudinal steel bars.

[0006] Preferably, the cross-section of the pad is rectangular.

[0007] Preferably, the fixing component consists of a connecting column, a sheath, and a base. The connecting column is fixed to the bottom end of the longitudinal reinforcing bar. The sheath is fitted onto the surface of the connecting column and is threaded. The bottom end of the sheath and the surface of the pad are provided with a base. The bottom end of the base is fixed to the surface of the pad. The bottom end of the connecting column is inserted into the inside of the base.

[0008] Preferably, the sheath is a hollow cylindrical structure, and the outer diameter of the base is the same as the outer diameter of the sheath.

[0009] Preferably, a locking assembly is provided at the connection between the bottom end of the sheath and the top end of the base. The locking assembly consists of a slot, a silicone fixing seat, and a locking block. The slot is opened at the inner edge of the top wall of the base. The locking block is fixed to the bottom end of the sheath. The silicone fixing seat is disposed between the slot and the locking block. The outer side of the silicone fixing seat is fixed to the inner wall of the slot.

[0010] Preferably, the inner wall edge of the silicone fixing seat has an inclined structure.

[0011] Preferably, a support mechanism is provided between multiple groups of concrete. The support mechanism consists of symmetrically arranged steel plates and multiple support plates, with the multiple support plates arranged between the symmetrically arranged steel plates.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] By designing a reinforcement mechanism, the problem of insufficient ground bearing capacity making it difficult to effectively transfer and distribute loads when the bottom of the steel reinforcement frame of the tunnel support structure is relatively soft during construction, thus affecting the overall stability and safety of the support, is addressed. By installing a reinforcement mechanism at the bottom of the steel reinforcement frame, the reinforcement mechanism is simultaneously installed on the tunnel ground during construction and connected and fixed to the steel reinforcement frame. The reinforcement mechanism increases the contact area between the steel reinforcement frame and the soft ground, allowing the soft bottom layer to withstand greater loads and preventing the steel reinforcement frame from sinking into the bottom layer. Furthermore, the reinforcement mechanism ensures more even stress distribution on the steel reinforcement frame, reducing the risk of tilting or displacement due to excessive local stress and maintaining the overall stability of the tunnel support structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This utility model Figure 1 Enlarged schematic diagram of region A in the diagram;

[0016] Figure 3 This utility model Figure 2 Enlarged schematic diagram of region B in the diagram;

[0017] Figure 4 This is a cross-sectional view of the installation location of the connecting column and pad of this utility model;

[0018] In the diagram: 1. Rebar frame; 11. Longitudinal reinforcement; 12. Transverse reinforcement; 2. Concrete; 3. Support mechanism; 31. Steel plate; 32. Support plate; 4. Reinforcing mechanism; 41. Pad plate; 42. Fixing component; 421. Connecting column; 422. Sheath; 4221. Slot; 4222. Silicone fixing seat; 4223. Locking block; 423. Base. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1 to 4This utility model provides a technical solution: a tunnel support structure for tunnel construction, including a steel reinforcement frame 1 installed on the tunnel wall. The steel reinforcement frame 1 is composed of multiple longitudinal steel bars 11 and multiple transverse steel bars 12. The multiple longitudinal steel bars 11 and multiple transverse steel bars 12 are crisscrossed and attached to the tunnel wall. Multiple sets of concrete 2 are poured on the surface of the steel reinforcement frame 1. Supporting mechanisms 3 are provided between the multiple sets of concrete 2. A reinforcing mechanism 4 is provided at the bottom end of the steel reinforcement frame 1 and inside the concrete 2. The reinforcing mechanism 4 is composed of a pad 41 and multiple fixing components 42. The pad 41 penetrates through the inside of the concrete 2 and is located at the bottom of the multiple longitudinal steel bars 11. In this structure, multiple fixing components 42 are installed at the bottom of multiple longitudinal reinforcing bars 11. The designed reinforcement mechanism 4 addresses the problem that, during the construction of the tunnel inner support structure, when the bottom of the reinforcing bar frame 1 is in contact with the tunnel surface and the ground is relatively soft, the insufficient ground bearing capacity makes it difficult to effectively transfer and distribute the loads, affecting the overall stability and safety of the support. By installing the reinforcement mechanism 4 at the bottom of the reinforcing bar frame 1, the reinforcement mechanism 4 is installed simultaneously on the tunnel surface during construction and connected and fixed to the reinforcing bar frame 1. The reinforcement mechanism 4 increases the contact area between the reinforcing bar frame 1 and the soft ground. To enable the soft bottom layer to withstand greater loads and prevent the steel frame 1 from sinking into the bottom layer, the reinforcement mechanism 4 allows the steel frame 1 to be stressed more evenly, reducing the risk of tilting or displacement caused by excessive local stress and maintaining the overall stability of the tunnel support structure. The pad plate 41 has a rectangular cross-section. The fixing component 42 consists of a connecting column 421, a sheath 422, and a base 423. The connecting column 421 is fixed to the bottom end of the longitudinal steel bar 11, and the sheath 422 is fitted onto the surface of the connecting column 421 and is threaded. During the installation of the steel frame 1, the bottom end of the steel frame 1 is initially limited to the pad plate 41 by the base 423, and then the sheath 422 is used to further limit the connection. 422 is reinforced to improve the support effect. The bottom end of the sheath 422 and the surface of the pad 41 are provided with a base 423. The bottom end of the base 423 is fixed to the surface of the pad 41. The bottom end of the connecting column 421 is inserted into the inner side of the base 423. The sheath 422 is a hollow cylindrical structure. The outer diameter of the base 423 is the same as the outer diameter of the sheath 422. A support mechanism 3 is provided between multiple sets of concrete 2. The support mechanism 3 is composed of symmetrically arranged steel plates 31 and multiple support plates 32. The support mechanism 3 supports and connects multiple sets of concrete 2. The multiple support plates 32 are arranged between the symmetrically arranged steel plates 31.

[0021] In this embodiment, preferably, a locking assembly is provided at the connection between the bottom end of the sheath 422 and the top end of the base 423. The locking assembly consists of a slot 4221, a silicone fixing seat 4222, and a locking block 4223. The slot 4221 is opened at the inner edge of the top end of the base 423. The locking block 4223 is fixed to the bottom end of the sheath 422. The silicone fixing seat 4222 is disposed between the slot 4221 and the locking block 4223. The outer side of the silicone fixing seat 4222 is fixed to the inner wall of the slot 4221. The locking assembly allows the sheath 422 to rotate threadedly on the surface of the connecting column 421. During the process of the end of the sheath 422 fitting with the end of the base 423, the locking assembly plays a role in reinforcement and locking, further improving the splicing stability, thereby ensuring the support effect of the steel frame 1. The inner edge of the silicone fixing seat 4222 has an inclined structure.

[0022] The working principle and usage process of this utility model are as follows: In a tunnel, the tunnel support structure ensures the safety of tunnel construction and the smooth flow of the passage. During the construction of the tunnel support structure, a shotcrete machine is used to spray concrete at high speed onto the rock surface for rapid setting and hardening. This can promptly seal the surrounding rock, fill cracks, and bond tightly with the surrounding rock, providing support resistance. Simultaneously, the pad plate 41 is laid on both sides of the tunnel and fixed in position with concrete. Then, the steel reinforcement frame 1 is laid on the tunnel wall and bonded to the wall surface with concrete. At the same time, the bottom ends of the longitudinal steel bars 11 that make up the steel reinforcement frame 1 are inserted into the pad plate 41 for fixation. The base 423 is fixed, and the sleeve 422 fitted on the surface of the connecting column 421 is rotated, so that the locking block 4223 at the bottom of the sleeve 422 rotates to the inside of the slot 4221 and is locked by the silicone fixing seat 4222. Then, multiple sets of molds are installed on the steel frame 1, and the support mechanism 3 is installed between the multiple sets of molds for reinforcement. The concrete is centrally mixed at the mixing plant and pumped into the mold by the concrete delivery pump. It is poured in layers according to a certain order and thickness, and compacted with an immersion vibrator. After the concrete is poured, it is cured in time to keep the surface moist. After the specified strength is reached, the formwork is removed.

[0023] 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 support structure for tunnel construction, comprising a steel reinforcement frame (1) installed on the tunnel wall, characterized in that: The steel reinforcement frame (1) is composed of multiple longitudinal steel bars (11) and multiple transverse steel bars (12). The multiple longitudinal steel bars (11) and multiple transverse steel bars (12) are interwoven and attached to the tunnel wall. Multiple sets of concrete (2) are poured on the surface of the steel reinforcement frame (1). A support mechanism (3) is set between the multiple sets of concrete (2). A reinforcement mechanism (4) is set at the bottom of the steel reinforcement frame (1) and inside the concrete (2). The reinforcement mechanism (4) is composed of a pad (41) and multiple fixing components (42). The pad (41) penetrates through the inside of the concrete (2) and is located at the bottom of the multiple longitudinal steel bars (11). The multiple fixing components (42) are all set at the bottom of the multiple longitudinal steel bars (11).

2. The tunnel support structure for tunnel construction according to claim 1, characterized in that: The cross-section of the pad (41) is rectangular.

3. The tunnel support structure for tunnel construction according to claim 1, characterized in that: The fixing component (42) consists of a connecting column (421), a sheath (422), and a base (423). The connecting column (421) is fixed to the bottom end of the longitudinal steel bar (11). The sheath (422) is fitted onto the surface of the connecting column (421) and is threaded. The bottom end of the sheath (422) and the surface of the pad (41) are provided with a base (423). The bottom end of the base (423) is fixed to the surface of the pad (41). The bottom end of the connecting column (421) is inserted into the inside of the base (423).

4. A tunnel support structure for tunnel construction according to claim 3, characterized in that: The sheath (422) is a hollow cylindrical structure, and the outer diameter of the base (423) is the same as that of the sheath (422).

5. A tunnel support structure for tunnel construction according to claim 4, characterized in that: A locking assembly is provided at the connection between the bottom end of the sheath (422) and the top end of the base (423). The locking assembly consists of a slot (4221), a silicone fixing seat (4222), and a locking block (4223). The slot (4221) is opened at the edge of the inner wall of the top end of the base (423). The locking block (4223) is fixed to the bottom end of the sheath (422). The silicone fixing seat (4222) is disposed between the slot (4221) and the locking block (4223). The outer side of the silicone fixing seat (4222) is fixed to the inner wall of the slot (4221).

6. A tunnel support structure for tunnel construction according to claim 5, characterized in that: The inner wall edge of the silicone mounting base (4222) has an inclined structure.

7. A tunnel support structure for tunnel construction according to claim 1, characterized in that: A support mechanism (3) is provided between multiple sets of concrete (2). The support mechanism (3) consists of symmetrically arranged steel plates (31) and multiple support plates (32). The multiple support plates (32) are arranged between the symmetrically arranged steel plates (31).

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