Combined reinforcing structure for protecting tunnel beside excavated foundation pit

Abstract

The utility model discloses a combined reinforcing structure for protecting a side tunnel of an excavated foundation pit, which comprises a ground, a foundation pit is poured in the ground, and a first reinforcing seat is fixedly poured on the side surface of the foundation pit, and the combined reinforcing structure for protecting the side tunnel of the excavated foundation pit is characterized in that a concrete base and a concrete column are fixedly poured at the bottom of the foundation pit; the bottom bearing capacity of the foundation pit can be increased, collapse deformation damage is prevented, the outer side of the foundation pit can be reinforced and supported through the design of the first reinforcing base and the second reinforcing base, the stability of foundation pit construction is improved, the bottom of the second reinforcing base can be reinforced and supported through the design of the concrete block and the concrete base, and bottom sedimentation is prevented; the bolts are inserted into the slots and are fixedly poured and connected, so that the arc-shaped beam is conveniently and quickly fixedly mounted, the design of the reinforcing wall and the arc-shaped beam can reinforce, support and protect the tunnel and improve the pressure resistance, and the design of the reinforcing mesh can improve the bearing capacity of the arc-shaped beam, improve the anti-seismic and anti-cracking performance and ensure the engineering quality.

Description

Technical Field

[0001] This utility model relates to the field of construction technology, specifically to a combined reinforcement structure for protecting the side tunnel of an excavated foundation pit. Background Technology

[0002] Deep foundation pit excavation and subway tunnel construction are common underground engineering projects. Due to limited shallow ground space in cities, deep foundation pit excavation projects often occur adjacent to existing operational subway tunnels. Foundation pit excavation unloads the soil, causing deformation of adjacent tunnels. This not only affects the normal operation of the subway but can also damage the existing tunnel structure in severe cases. Therefore, it is necessary to take certain measures to protect existing tunnels and reduce the impact of adjacent foundation pit excavation.

[0003] Currently, there is a combined anchor and isolation pile reinforcement structure for protecting the tunnel beside an excavated foundation pit. This structure includes isolation piles, a three-axis cement mixing pile wall, inclined jet grouting piles, a lateral tension reinforcement body, hollow fiberglass pipes, tension anchors, and a capping beam. Multiple isolation piles are installed between the foundation pit and the tunnel, with each isolation pile connected to a capping beam at its top and inserted into the bedrock at its bottom. A three-axis cement mixing pile wall is installed on the sidewall of the foundation pit. An inclined jet grouting pile and a lateral tension reinforcement body are installed between the foundation pit and the isolation piles. One end of each inclined jet grouting pile and lateral tension reinforcement body is connected to the sidewall of the foundation pit, and the other end passes through the gap between adjacent isolation piles, with a tail reinforcement body at the tail end.

[0004] For example, CN217438921U discloses a combined anchor and isolation pile reinforcement structure for protecting a tunnel beside an excavated foundation pit. This utility model includes isolation piles, a three-axis cement mixing pile wall, inclined jet grouting piles, a lateral pull-out reinforced body, hollow fiberglass pipes, tension anchors, and a capping beam. Multiple isolation piles are installed between the foundation pit and the tunnel, with each isolation pile connected to a capping beam at its top and inserted into the bedrock at its bottom. A three-axis cement mixing pile wall is installed on the sidewall of the foundation pit. An inclined jet grouting pile and a lateral pull-out reinforced body are installed between the foundation pit and the isolation piles. One end of the inclined jet grouting pile and the lateral pull-out reinforced body is connected to the sidewall of the foundation pit, and the other end passes through the gap between adjacent isolation piles, with a tail-end reinforced body at the tail end. However, this combined anchor and isolation pile reinforcement structure for protecting a tunnel beside an excavated foundation pit is inconvenient for reinforcing the bottom of the foundation pit and for reinforcing the tunnel.

[0005] As can be seen from the solutions disclosed in the existing patent documents, it is inconvenient to reinforce the bottom of the foundation pit and to reinforce the tunnel. Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The purpose of this utility model is to provide a combined reinforcement structure for protecting the tunnel next to the excavated foundation pit, so as to solve the problems that it is inconvenient to strengthen the support at the bottom of the foundation pit and it is inconvenient to strengthen the support of the tunnel.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a combined reinforcement structure for protecting the side tunnel of an excavated foundation pit, comprising a ground surface, a foundation pit being poured inside the ground surface, a first reinforcing seat being fixedly poured on the side of the foundation pit, a second reinforcing seat being fixedly poured on the side of the foundation pit, a concrete block being fixedly poured at the lower end of the second reinforcing seat, a concrete base being fixedly poured at the bottom of the concrete block, a concrete column being fixedly poured inside the concrete base, a steel reinforcement cage being fixedly poured inside the concrete column, a tunnel being installed inside the ground surface, a reinforcing wall being poured inside the ground surface, an arc-shaped beam being closely attached to the upper end of the reinforcing wall, a steel mesh being poured inside the arc-shaped beam, and pins being fixedly poured at the lower ends of both sides of the arc-shaped beam.

[0008] Preferably, a concrete base and a concrete column are poured inside the ground. By fixing the concrete base and concrete column at the bottom of the foundation pit, the bearing capacity at the bottom of the foundation pit can be increased, preventing collapse, deformation and damage.

[0009] Preferably, a concrete base is fixedly poured on the lower end face of the foundation pit, and a concrete column is fixedly poured on the lower end face of the foundation pit. The design of the first and second reinforcing seats can strengthen the support on the outside of the foundation pit and improve the stability of the foundation pit construction.

[0010] Preferably, the ground is filled with a concrete block, and the lower end of the first reinforcing seat is fixed with the concrete block. The design of the concrete block and the concrete base can strengthen the support of the bottom of the second reinforcing seat and prevent the bottom from settling.

[0011] Preferably, the upper end of the reinforcing wall is provided with a slot, and a pin is inserted into the slot. By inserting the pin into the slot and fixing it in place, the curved beam can be quickly and easily fixed and installed.

[0012] Preferably, an arc-shaped beam is cast inside the ground, and reinforcing walls are fixedly cast on both sides of the tunnel. The design of the reinforcing walls and the arc-shaped beam can strengthen the support and protection of the tunnel and improve its pressure resistance.

[0013] Preferably, the arc-shaped beam is internally connected to a tunnel, and the ground is internally filled with isolation pile beams. The design of the steel mesh can improve the load-bearing capacity of the arc-shaped beam, enhance its seismic and crack resistance, and ensure the quality of the project.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model increases the bearing capacity of the foundation pit bottom by fixing and pouring concrete base and concrete column at the bottom of the foundation pit, preventing collapse, deformation and damage. The design of the first and second reinforcing seats can strengthen the support of the outside of the foundation pit, improving the stability of the foundation pit construction. The design of concrete blocks and concrete base can strengthen the support of the bottom of the second reinforcing seat, preventing bottom settlement.

[0016] 2. This utility model facilitates the quick and easy installation of curved beams by inserting pins into the slots and fixing them in a cast-in-place manner. The design of the reinforced wall and curved beams can strengthen the support and protection of the tunnel, improve its compressive strength, and the design of the steel mesh can improve the load-bearing capacity of the curved beams, enhance their seismic and crack resistance, and ensure the quality of the project. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is an enlarged sectional view of the foundation pit of this utility model;

[0019] Figure 3 This is an enlarged sectional view of the reinforcing wall of this utility model;

[0020] Figure 4 This is an enlarged view of section A of this utility model.

[0021] In the diagram: 1 Ground, 11 Foundation pit, 12 First reinforcing seat, 13 Second reinforcing seat, 14 Concrete block, 15 Concrete base, 16 Concrete column, 17 Reinforcing cage, 18 Isolation pile beam, 2 Tunnel, 21 Reinforcing wall, 22 Curved beam, 23 Reinforcing mesh, 24 Pin, 25 Slot. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-4The diagram shows a combined reinforcement structure for protecting the tunnel beside an excavated foundation pit, including a ground surface 1. A foundation pit 11 is poured inside the ground surface 1. A first reinforcing seat 12 is fixedly poured on the side of the foundation pit 11. A second reinforcing seat 13 is fixedly poured on the side of the foundation pit 11. A concrete block 14 is fixedly poured at the lower end of the second reinforcing seat 13. A concrete base 15 is fixedly poured at the bottom of the concrete block 14. A concrete column 16 is fixedly poured inside the concrete base 15. A steel reinforcement cage 17 is fixedly poured inside the concrete column 16. A tunnel 2 is installed inside the ground surface 1. A reinforcing wall 21 is poured inside the ground surface 1. An arc-shaped beam 22 is attached to the upper end of the reinforcing wall 21. A steel mesh 23 is poured inside the arc-shaped beam 22. Pins 24 are fixedly poured at the lower ends of both sides of the arc-shaped beam 22.

[0024] To reinforce the foundation pit 11, a concrete base 15 and a concrete column 16 are poured inside the ground surface 1. By fixing the concrete base 15 and the concrete column 16 at the bottom of the foundation pit 11, the bearing capacity at the bottom of the foundation pit 11 can be increased, preventing collapse, deformation and damage. The concrete base 15 and the concrete column 16 are fixedly poured on the lower end face of the foundation pit 11. The design of the first reinforcing seat 12 and the second reinforcing seat 13 can reinforce the outside of the foundation pit 11 and improve the stability of the foundation pit 11 construction. A concrete block 14 is poured inside the ground surface 1. The lower end of the first reinforcing seat 12 is fixedly poured with a concrete block 14. The design of the concrete block 14 and the concrete base 15 can reinforce the bottom of the second reinforcing seat 13 and prevent bottom settlement.

[0025] To improve the support of Tunnel 2, a slot 25 is provided inside the upper end of the reinforcing wall 21. A pin 24 is inserted into the slot 25. By inserting the pin 24 into the slot 25 and fixing it in place, the arc beam 22 can be quickly and easily fixed and installed. The arc beam 22 is poured inside the ground 1. The reinforcing walls 21 are fixedly poured on both sides of the tunnel 2. The design of the reinforcing wall 21 and the arc beam 22 can strengthen the support and protection of the tunnel 2 and improve its compressive strength. The arc beam 22 is fitted inside the tunnel 2. An isolation pile beam 18 is poured inside the ground 1. The design of the steel mesh 23 can improve the bearing capacity of the arc beam 22, improve its seismic and crack resistance, and ensure the quality of the project.

[0026] This protective structure for the tunnel adjacent to the excavated pit increases the bearing capacity of the pit bottom by fixing and pouring concrete base 15 and concrete column 16 at the bottom of the pit 11, preventing collapse and deformation damage. The design of the first reinforcing seat 12 and the second reinforcing seat 13 can strengthen the support on the outside of the pit 11, improving the stability of the pit 11 construction. The design of concrete block 14 and concrete base 15 can strengthen the support at the bottom of the second reinforcing seat 13, preventing bottom settlement. By inserting the pin 24 into the slot 25 and fixing and pouring the connection, the arc beam 22 can be quickly and easily fixed and installed. The design of the reinforcing wall 21 and the arc beam 22 can strengthen the support and protection of the tunnel 2, improving its compressive strength. The design of the steel mesh 23 can improve the bearing capacity of the arc beam 22, improve its seismic and crack resistance, and ensure the quality of the project.

[0027] 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 combined reinforcing structure for protecting a tunnel beside an excavated foundation pit, comprising a ground (1), characterized in that: The inside of the ground (1) is poured with a foundation pit (11), the side of the foundation pit (11) is fixedly poured with a first reinforcing seat (12), the side of the foundation pit (11) is fixedly poured with a second reinforcing seat (13), the lower end of the second reinforcing seat (13) is fixedly poured with a concrete block (14), the bottom of the concrete block (14) is fixedly poured with a concrete base (15), the inside of the concrete base (15) is fixedly poured with a concrete column (16), the inside of the concrete column (16) is fixedly poured with a steel reinforcement cage (17), the inside of the ground (1) is installed with a tunnel (2), the inside of the ground (1) is poured with a reinforcing wall (21), the upper end of the reinforcing wall (21) is closely attached with an arc-shaped beam (22), the inside of the arc-shaped beam (22) is poured with a steel mesh (23), the lower end of the two sides of the arc-shaped beam (22) is fixedly poured with a bolt (24).

2. The combined reinforcing structure for protecting a tunnel beside a foundation pit according to claim 1, characterized in that: The inside of the ground (1) is poured with a concrete base (15), and the inside of the ground (1) is poured with a concrete column (16).

3. The combined reinforcing structure for protecting a tunnel beside a foundation pit according to claim 1, characterized in that: The lower end surface of the foundation pit (11) is fixedly poured with a concrete base (15), and the lower end surface of the foundation pit (11) is fixedly poured with a concrete column (16).

4. The combined reinforcing structure for protecting a tunnel beside a foundation pit according to claim 1, characterized in that: The inside of the ground (1) is poured with a concrete block (14), and the lower end of the first reinforcing seat (12) is fixedly poured with a concrete block (14).

5. The combined reinforcing structure for protecting the tunnel beside the excavation foundation pit according to claim 1, characterized in that: The upper end of the reinforcing wall (21) is provided with a slot (25) inside, and the slot (25) is inserted with a bolt (24) inside.

6. The combined reinforcing structure for protecting a tunnel beside a foundation pit according to claim 1, characterized in that: The inside of the ground (1) is poured with an arc-shaped beam (22), and the two sides of the tunnel (2) are fixedly poured with a reinforcing wall (21).

7. The combined reinforcing structure for protecting a tunnel beside a foundation pit according to claim 1, characterized in that: The inside of the arc-shaped beam (22) is sleeved with a tunnel (2), and the inside of the ground (1) is poured with an isolation pile beam (18).

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