Reinforcing structure used when shield tunnel downwards passes through bridge body
By setting up a reinforced structure at the junction area between the shield tunnel and the bridge body, the problem of bridge body reinforcement when the shield tunnel penetrates the bridge body is solved, and the bridge body protection during the construction process is achieved, ensuring construction safety and stability.
Patent Information
- Application Number
- CN202420883285.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-26
AI Technical Summary
When the shield tunnel penetrates the bridge body, it is difficult for the prior art to effectively reinforce the bridge body, resulting in the bridge body being damaged during construction.
A first grouting reinforcement, a second grouting reinforcement and a support mechanism are arranged in the intersection area of the shield tunnel and the bridge body, including a reinforcement layer and a buckle scaffolding, for reinforcement of the bridge body and preventing damage.
By setting up a reinforced structure, the bridge body is effectively prevented from being damaged during construction of shield tunnels, ensuring the safety and stability of construction.
Smart Images
Figure CN222206290U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shield tunnels, in particular to a reinforcement structure for a shield tunnel passing under a bridge body. Background Art
[0002] The shield method is a fully mechanized construction method in the dark excavation method. It pushes the shield machine into the ground, supports the surrounding rock with the shield shell and segments to prevent collapse into the tunnel, and excavates the soil in front of the excavation face with a cutting device, transports it out of the hole with an excavation machine, pressurizes it at the rear with a jack, and assembles prefabricated concrete segments to form a mechanized construction method for the tunnel structure. When it is necessary to construct a shield tunnel under the bridge body, it is usually necessary to reinforce the bridge body itself and the surrounding area to prevent the bridge body from being damaged.
[0003] Therefore, there is a need for a reinforcement structure for a shield tunnel passing under a bridge body that can solve the above-mentioned problems. Summary of the invention
[0004] The purpose of the utility model is to provide a reinforcement structure for a shield tunnel passing under a bridge body in accordance with the above-mentioned deficiencies of the prior art. By arranging a first grouting reinforcement body, a second grouting reinforcement body and a supporting mechanism in the intersection area of the shield tunnel and the bridge body, the bridge body can be reinforced, thereby preventing the bridge body from being damaged during the construction of the shield tunnel.
[0005] The purpose of this utility model is achieved by the following technical solutions:
[0006] A reinforcement structure for a shield tunnel passing under a bridge body, comprising a shield tunnel, a bridge body, a first grouting reinforcement body and a second grouting reinforcement body, wherein two shield tunnels are arranged opposite to each other, and the shield tunnel passes under the bridge body, and the bridge body comprises a mortar-laid rubble wall, a top plate and a bottom plate, wherein the top plate and the bottom plate are respectively arranged at two ends of the mortar-laid rubble wall, and an opening is formed between the mortar-laid rubble wall, the top plate and the bottom plate, and the bridge body is provided with the first grouting reinforcement body at the four corners of the area where it intersects with the shield tunnel, the top surface of the first grouting reinforcement body is located on the bottom surface of the mortar-laid rubble wall, and the bottom surface is located below the bottom of the shield tunnel, and the shield tunnel is provided with the second grouting reinforcement body in the area where it intersects with the bridge body, and the second grouting reinforcement body is arranged circumferentially along the top of the shield tunnel.
[0007] The bridge body is provided with a supporting mechanism in the opening of the area where it intersects with the shield tunnel, and the supporting mechanism includes a reinforcement layer and a buckle scaffolding, the reinforcement layer is arranged on the bottom plate, and the buckle scaffolding is supported by the mortar-laid rubble wall, the top plate and the bottom plate.
[0008] The angle between the line connecting one end of the second grouting reinforcement body and the center of the shield tunnel and the line connecting the other end of the second grouting reinforcement body and the center of the shield tunnel is 150 degrees.
[0009] The top plate is a prefabricated concrete hollow cover plate.
[0010] The bottom plate is composed of a mortar-laid slab stone layer and a plain concrete layer which are arranged in sequence from top to bottom.
[0011] The reinforcement layer is composed of a C30 concrete layer, a fine stone concrete protective layer and a PVC polymer waterproof board which are arranged in sequence from top to bottom.
[0012] The utility model has the advantages that the bridge body can be reinforced by arranging the first grouting reinforcement body, the second grouting reinforcement body and the supporting mechanism in the intersection area of the shield tunnel and the bridge body, thereby preventing the bridge body from being damaged during the construction of the shield tunnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a plan view of the relationship between the shield tunnel and the bridge body of the utility model;
[0014] Figure 2 It is a longitudinal section diagram of the shield tunnel and bridge body of the utility model;
[0015] Figure 3 It is a cross-sectional view of the shield tunnel and bridge body of the utility model;
[0016] Figure 4 It is a cross-sectional view of the bridge body of the utility model. DETAILED DESCRIPTION
[0017] The following is a further detailed description of the features of the present invention and other related features through embodiments in conjunction with the accompanying drawings to facilitate understanding by technicians in the same industry:
[0018] like Figures 1 to 4 As shown, the marks in the figure represent respectively:
[0019] Bridge body 1, left-line tunnel 2, right-line tunnel 3, first grouting reinforcement body 4, second grouting reinforcement body 5, supporting mechanism 6, mortar-laid stone wall 7, top plate 8, bottom plate 9, reinforcement layer 10, disc-locked scaffolding 11, sleeve valve pipe 12.
[0020] Example: Figures 1 to 4As shown, this embodiment relates to a reinforcement structure when a shield tunnel passes under a bridge body, which mainly includes a shield tunnel, a bridge body 1, a first grouting reinforcement body 4, a second grouting reinforcement body 5 and a supporting mechanism 6. Two shield tunnels are relatively arranged, namely a left-line tunnel 2 and a right-line tunnel 3. The shield tunnel passes under the bridge body 1. The bridge body 1 includes a mortar-laid rubble wall 7, a top plate 8 and a bottom plate 9. The top plate 8 and the bottom plate 9 are respectively arranged at the two ends of the mortar-laid rubble wall 7. An opening is formed between the mortar-laid rubble wall 7, the top plate 8 and the bottom plate 9. In this embodiment, the top plate 8 adopts a 900mm thick precast concrete hollow cover plate, and the bottom plate 9 is composed of a 500mm thick mortar-laid rubble layer and a 50mm thick plain concrete layer arranged in sequence from top to bottom. The first grouting reinforcement body 4, the second grouting reinforcement body 5 and the supporting mechanism 6 are all located in the intersection area of the shield tunnel and the bridge body 1, which can realize the reinforcement of the bridge body, thereby preventing the bridge body 1 from being damaged during the construction of the shield tunnel.
[0021] like Figure 1~2 As shown, the bridge body 1 is provided with first grouting reinforcement bodies 4 at the four corners of the area where it intersects with the shield tunnel, the top surface of the first grouting reinforcement bodies 4 is located on the bottom surface of the mortar-laid rubble wall 7, and the bottom surface of the first grouting reinforcement bodies 4 is located below the bottom of the shield tunnel. In this embodiment, the first grouting reinforcement bodies 4 are formed by grouting the sleeve valve tube 12.
[0022] like Figure 1 and Figure 3 As shown, the shield tunnel is provided with a second grouting reinforcement body 5 in the area where it intersects with the bridge body 1, and the second grouting reinforcement body 5 is arranged along the circumferential direction of the top of the shield tunnel. In this embodiment, the angle α between the line connecting one end of the second grouting reinforcement body 5 and the center of the shield tunnel and the line connecting the other end of the second grouting reinforcement body 5 and the center of the shield tunnel is 150 degrees, and the thickness of the second grouting reinforcement body 5 is 1m.
[0023] like Figure 1 and Figure 4 As shown, the bridge body 1 is provided with a support mechanism 6 in the opening of the area where it intersects with the shield tunnel. The support mechanism 6 includes a reinforcement layer 10 and a buckle scaffolding 11. The reinforcement layer 10 is arranged on the bottom plate 9. The reinforcement layer 10 is used to strengthen the strength of the bottom plate 9. The buckle scaffolding 11 is supported on the mortar-laid slab stone wall 7, the top plate 8 and the bottom plate 9 to support the inside of the bridge body 1. In this embodiment, the reinforcement layer 10 is composed of a 200mm thick C30 concrete layer, a 50mm thick fine stone concrete protective layer and a 1.5mm thick PVC polymer waterproof board arranged in sequence from top to bottom.
[0024] The beneficial technical effect of this embodiment is: by arranging the first grouting reinforcement body, the second grouting reinforcement body and the supporting mechanism in the intersection area of the shield tunnel and the bridge body, the bridge body can be reinforced, thereby preventing the bridge body from being damaged during the construction of the shield tunnel.
[0025] Although the above embodiments have described the concepts and embodiments of the purpose of the utility model in detail with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and modifications can still be made to the utility model without departing from the scope of the claims, so they are not described one by one here.
Claims
1. A reinforcement structure for a shield tunnel passing under a bridge, characterized in that: It includes a shield tunnel, a bridge body, a first grouting reinforcement body and a second grouting reinforcement body. Two shield tunnels are arranged opposite to each other. The shield tunnel passes under the bridge body. The bridge body includes a mortar-laid rubble wall, a top plate and a bottom plate. The top plate and the bottom plate are respectively arranged at two ends of the mortar-laid rubble wall. An opening is formed between the mortar-laid rubble wall, the top plate and the bottom plate. The bridge body is provided with the first grouting reinforcement body at the four corners of the area where it intersects with the shield tunnel. The top surface of the first grouting reinforcement body is located on the bottom surface of the mortar-laid rubble wall, and the bottom surface is located below the bottom of the shield tunnel. The shield tunnel is provided with the second grouting reinforcement body in the area where it intersects with the bridge body. The second grouting reinforcement body is arranged circumferentially along the top of the shield tunnel.
2. A reinforcement structure for a shield tunnel passing under a bridge as claimed in claim 1, characterized in that: The bridge body is provided with a supporting mechanism in the opening of the area where it intersects with the shield tunnel, and the supporting mechanism includes a reinforcement layer and a buckle scaffolding, the reinforcement layer is arranged on the bottom plate, and the buckle scaffolding is supported by the mortar-laid rubble wall, the top plate and the bottom plate.
3. A reinforcement structure for a shield tunnel passing under a bridge as claimed in claim 1, characterized in that: The angle between the line connecting one end of the second grouting reinforcement body and the center of the shield tunnel and the line connecting the other end of the second grouting reinforcement body and the center of the shield tunnel is 150 degrees.
4. A reinforcement structure for a shield tunnel passing under a bridge as claimed in claim 1, characterized in that: The top plate is a prefabricated concrete hollow cover plate.
5. The reinforcement structure for a shield tunnel passing under a bridge as claimed in claim 1, characterized in that: The bottom plate is composed of a mortar-laid slab stone layer and a plain concrete layer which are arranged in sequence from top to bottom.
6. A reinforcement structure for a shield tunnel passing under a bridge as claimed in claim 2, characterized in that: The reinforcement layer is composed of a C30 concrete layer, a fine stone concrete protective layer and a PVC polymer waterproof board which are arranged in sequence from top to bottom.