Arch springing fixing and connecting structure for tunnel sleeve lining reinforcing steel arch

Abstract

The utility model relates to an arch foot fixing and connecting structure for a tunnel bushing reinforcing steel arch. And the space for erecting the tunnel sleeve lining reinforced steel arch foundation is limited and the like. The structure comprises a sleeve lining reinforced steel arch frame and a steel plate grillwork, the top of the steel plate grillwork is fixed at the bottom of an arch foot of the sleeve lining reinforced steel arch; the steel plate grillwork is located in the existing ditch, and the bottom and the two sides of the steel plate grillwork abut against a ditch bottom plate and ditch side walls of the existing ditch. And a water flow channel with the same water flow direction as the existing ditch is arranged in the steel plate grillwork. According to the utility model, the existing lining structure is not damaged, the existing ditch is not occupied, the construction space required by the steel frame foundation is ensured, and the drainage path of the tunnel is not greatly disturbed.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to an arch foot fixing connection structure used for tunnel lining reinforcement steel arch frame. Background Art

[0002] With the long-term operation of railways and the influence of various external factors during use, tunnel disease problems have gradually emerged. Tunnel lining reinforcement has become one of the commonly used and practical and effective means in the current disease treatment process. During the construction of the tunnel lining reinforcement steel arch frame, the bottom of the steel arch frame needs to be erected on a stable foundation and occupy a part of the space to meet the overall stability requirements of the lining.

[0003] However, in existing engineering practices, the space at the corner of the side wall is generally small when the bottom of the steel arch is erected, making it difficult to erect the steel frame foundation. Generally, the lining corner needs to be partially chiseled out. Due to the historical reasons such as technical standards and economic development during the construction of the existing tunnel, the concrete strength is low, and the partial chiseling method has a certain destructive effect on the lining. If the lining is not chiseled out for structural safety, and the concrete foundation is poured in the existing ditch, the water flow area of ​​the ditch will be reduced, which will have a significant adverse effect on dredging and drainage during operation.

[0004] Therefore, it is necessary to propose new measures to overcome the above-mentioned defects. Summary of the invention

[0005] The utility model aims to provide an arch foot fixing connection structure for tunnel casing reinforcement steel arch frame, so as to solve the problem of difficulty in erecting steel frame foundation.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] An arch foot fixing connection structure for a tunnel casing reinforcement steel arch frame, the structure comprising a casing reinforcement steel arch frame and a steel plate grid;

[0008] The steel plate grid is in a grid shape, and the top is fixed to the bottom of the arch foot of the sleeve lining reinforced steel arch frame;

[0009] The steel plate grid is located in the existing ditch, with the bottom and two sides close to the ditch bottom plate and ditch side walls of the existing ditch;

[0010] The steel plate grid has a water flow channel in the same direction as the water flow in the existing ditch.

[0011] Furthermore, the steel plate frame includes a steel plate frame bottom plate, a steel plate frame left vertical plate, a steel plate frame right vertical plate and a steel plate frame top plate, and the steel plate frame bottom plate, the steel plate frame left vertical plate, the steel plate frame right vertical plate and the steel plate frame top plate form a rectangular frame whose cross-section matches the existing ditch cross-section.

[0012] Furthermore, at least one horizontally arranged steel plate grid partition is provided in the rectangular frame of the steel plate grid to divide the steel plate grid into a plurality of water flow channels.

[0013] Furthermore, the outer sides of the left vertical plate of the steel plate grid and the right vertical plate of the steel plate grid are close to the side wall of the ditch;

[0014] The bottom of the steel plate grid bottom plate is close to the ditch bottom plate.

[0015] Furthermore, the top of the steel plate grid top plate is fixed to the ditch cover plate, and the ditch cover plate covers the top of the existing ditch.

[0016] Furthermore, the top of the ditch cover is fixed to the bottom of the sleeve lining reinforced steel arch frame bottom plate, and the bottom of the arch foot of the sleeve lining reinforced steel arch frame is fixed to the top of the sleeve lining reinforced steel arch frame bottom plate.

[0017] Furthermore, a reinforcing steel plate is arranged on the outer side of the bottom of the arch foot of the sleeve-reinforced steel arch frame, and the reinforcing steel plate is fixed to the bottom of the arch foot of the sleeve-reinforced steel arch frame and the bottom plate of the sleeve-reinforced steel arch frame.

[0018] Furthermore, each of the lining reinforcement steel arch frames corresponds to one of the steel plate grids, and the steel plate grids are arranged at intervals in the existing ditch.

[0019] Furthermore, the ditch cover is arranged along the existing ditch segments.

[0020] Furthermore, the steel plate grid, the ditch cover, the bottom plate of the sleeve-reinforced steel arch frame and the bottom of the arch foot of the sleeve-reinforced steel arch frame are fixedly connected by welding.

[0021] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0022] The utility model provides an arch foot fixing connection structure for tunnel lining reinforcement steel arch frame, which does not damage the existing lining structure and does not occupy the existing ditch, ensures the construction space required for the steel frame foundation, and does not cause significant disturbance to the tunnel drainage path. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a three-dimensional structural diagram of an embodiment of the utility model.

[0025] Figure 2 It is a schematic diagram of steel structure assembly of an embodiment of the utility model.

[0026] Figure 3 It is a front view of an embodiment of the utility model.

[0027] Figure 4 It is a large-scale drawing of a steel plate grid according to an embodiment of the utility model.

[0028] The symbols in the figure are:

[0029] 1-steel plate grid bottom plate, 2-steel plate grid left vertical plate, 3-steel plate grid right vertical plate, 4-steel plate grid middle partition, 5-steel plate grid top plate, 6-ditch cover plate, 7-lining reinforced steel arch frame bottom plate, 8-ditch side wall, 9-ditch bottom plate, 10-lining reinforced steel arch frame, 11-reinforced steel plate, 12-butt weld, 13-fillet weld. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0031] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connection", "setting", etc. should be understood in a broad sense, for example, it can be fixed connection, setting, or detachable connection, setting, or integral connection, setting. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The utility model provides an arch foot fixing connection structure for tunnel casing lining reinforcement steel arch frame, which is implemented in the construction of casing lining reinforcement steel arch frame for existing tunnel reinforcement, utilizes the space of existing ditch for operation, does not need to chisel out the existing concrete lining, and fixes the casing lining reinforcement steel arch frame without occupying the existing ditch space.

[0034] like Figure 1-4 The structure includes a lining reinforced steel arch frame 10 and a steel plate grid frame. The steel plate grid frame is in a grid shape and serves as the main foundation. The top is fixed to the bottom of the arch foot of the lining reinforced steel arch frame 10. The steel plate grid frame is located in the existing ditch, and the bottom and both sides are close to the ditch bottom plate 9 and the ditch side wall 8 of the existing ditch. The steel plate grid frame has a water flow channel in the same direction as the water flow in the existing ditch.

[0035] The steel plate grid includes a steel plate grid bottom plate 1, a steel plate grid left vertical plate 2, a steel plate grid right vertical plate 3 and a steel plate grid top plate 5, which are processed according to the existing ditch depth and the existing ditch width. The steel plate grid bottom plate 1, the steel plate grid left vertical plate 2, the steel plate grid right vertical plate 3 and the steel plate grid top plate 5 form a rectangular frame whose cross section matches the existing ditch cross section. In order to ensure the stability of the overall structure, at least one horizontally arranged steel plate grid partition 4 is provided in the rectangular frame of the steel plate grid to divide the steel plate grid into multiple water flow channels. Figure 1 In the embodiment of the present invention, a partition plate 4 is arranged horizontally in the steel plate grid to separate the steel plate grid into two upper and lower water flow channels, and each steel plate is welded to form a Japanese-shaped grid. In other embodiments, the number of partition plates 4 in the steel plate grid can be increased or decreased according to the depth of the ditch, and of course, vertical or oblique partition plates can also be added.

[0036] The outer sides of the left vertical plate 2 and the right vertical plate 3 of the steel plate frame are close to the side wall 8 of the ditch, and the bottom of the bottom plate 1 of the steel plate frame is close to the bottom plate 9 of the ditch.

[0037] Other structures are also provided between the steel plate grid and the bottom of the arch foot of the sleeve reinforcement steel arch frame 10. The top of the steel plate grid top plate 5 is fixed to the ditch cover plate 6. The ditch cover plate 6 covers the top of the existing ditch, replacing the original ditch concrete cover plate and is reinforced according to the size of the original ditch concrete cover plate. The top of the ditch cover plate 6 is fixed to the bottom of the sleeve reinforcement steel arch frame bottom plate 7, and the bottom of the arch foot of the sleeve reinforcement steel arch frame 10 is fixed to the top of the sleeve reinforcement steel arch frame bottom plate 7. A reinforcement steel plate 11 is provided on the outside of the bottom of the arch foot of the sleeve reinforcement steel arch frame 10, and the reinforcement steel plate 11 is fixed to the bottom of the arch foot of the sleeve reinforcement steel arch frame 10 and the sleeve reinforcement steel arch frame bottom plate 7.

[0038] Each lining reinforced steel arch frame 10 corresponds to a steel plate grid, and the steel plate grids are arranged at intervals in the existing ditch to ensure that there is a gap in the middle of the steel arch frame foundation to meet the drainage and dredging work during operation. The ditch cover 6 is arranged in pieces along the existing ditch, and the pieces are welded to the steel plate grid at the positions corresponding to the lining reinforced steel arch frame 10, and the rest of the parts can be opened to drain and dredge the ditch.

[0039] The steel plate grid, the ditch cover 6, the bottom plate of the lining reinforced steel arch frame 7 and the bottom of the arch foot of the lining reinforced steel arch frame 10 are fixedly connected by welding, and the vertical welding seams of the steel plates are filled with fillet welds, and the parallel lap welds are butt welds. After the construction of the steel plate surface is completed, anti-rust treatment is required.

[0040] The construction process of the utility model includes:

[0041] Step 1: Measure the depth and width of the ditch at the base of the steel arch as well as the thickness and width of the cover plate;

[0042] Step 2: Process steel plates outside the tunnel according to the measurement results, assemble and weld steel plate grids, weld ditch covers 6 and sleeve lining reinforcement steel arch frame bottom plates 7.

[0043] Step 3: Place the steel plate grid in the existing ditch below the location where the steel arch frame needs to be erected, and weld the lining-reinforced steel arch frame bottom plate 7 to the bottom of the steel plate frame as a whole.

[0044] Step 4: Construct the steel arch frame and weld it to the foundation to make it stable and reliable, so as to strengthen the lining.

[0045] Compared with the traditional methods of directly placing the steel arch frame on the side wall above the ditch side wall or filling the ditch with concrete as a base, the foundation of the utility model - the steel plate grid is set up in the existing ditch, providing a stable foundation for the steel arch frame and providing support for the existing ditch side wall. When the lining deformation causes great pressure on the steel arch frame, a steel plate base (ditch cover 6 and lining reinforcement steel arch frame bottom plate 7) is set between the steel plate grid and the bottom of the steel arch frame to replace the original concrete bottom plate, further reducing the pressure at the bottom of the steel arch frame and protecting the existing ditch side wall concrete structure. At the same time, the cavity in the steel plate grid provides sufficient water flow area to ensure that operation and maintenance work is not affected. This connection method can adjust the height and width of the Japanese-shaped steel plate frame, as well as the thickness of the steel plate at the connection between the bottom of the steel arch frame and the steel plate grid according to actual project needs, and is suitable for most tunnel lining reinforcement situations.

[0046] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of ​​the present invention.

Claims

1. An arch foot fixing connection structure for tunnel lining reinforcement steel arch frame, characterized in that: The structure comprises a sleeve-reinforced steel arch frame (10) and a steel plate grid; The steel plate grid is in a grid shape, and the top is fixed to the bottom of the arch foot of the sleeve lining reinforced steel arch frame (10); The steel plate grid is located in the existing ditch, with the bottom and two sides close to the ditch bottom plate (9) and ditch side walls (8) of the existing ditch; The steel plate grid has a water flow channel in the same direction as the water flow in the existing ditch.

2. The arch foot fixing connection structure for tunnel lining reinforcement steel arch frame according to claim 1 is characterized by: The steel plate grid comprises a steel plate grid bottom plate (1), a steel plate grid left vertical plate (2), a steel plate grid right vertical plate (3) and a steel plate grid top plate (5); the steel plate grid bottom plate (1), the steel plate grid left vertical plate (2), the steel plate grid right vertical plate (3) and the steel plate grid top plate (5) form a rectangular frame whose cross section matches the cross section of the existing ditch.

3. The arch foot fixing connection structure for tunnel lining reinforcement steel arch frame according to claim 2 is characterized in that: At least one steel plate grid partition (4) arranged in a horizontal direction is arranged in the rectangular frame of the steel plate grid, dividing the steel plate grid into a plurality of water flow channels.

4. The arch foot fixing connection structure for tunnel lining reinforcement steel arch frame according to claim 2 is characterized in that: The outer sides of the left vertical plate (2) of the steel plate frame and the right vertical plate (3) of the steel plate frame are close to the side wall (8) of the ditch; The bottom of the steel plate grid bottom plate (1) is in close contact with the ditch bottom plate (9).

5. The arch foot fixing connection structure for tunnel lining reinforcement steel arch frame according to claim 4 is characterized in that: The top of the steel plate grid top plate (5) is fixed to a ditch cover plate (6), and the ditch cover plate (6) covers the top of the existing ditch.

6. The arch foot fixing connection structure for tunnel lining reinforcement steel arch frame according to claim 5, characterized in that: The top of the ditch cover plate (6) is fixed to the bottom of the sleeve lining reinforced steel arch frame bottom plate (7), and the bottom of the arch foot of the sleeve lining reinforced steel arch frame (10) is fixed to the top of the sleeve lining reinforced steel arch frame bottom plate (7).

7. The arch foot fixing connection structure for tunnel lining reinforcement steel arch frame according to claim 6, characterized in that: A reinforcing steel plate (11) is provided on the outer side of the arch foot bottom of the sleeve-reinforced steel arch frame (10), and the reinforcing steel plate (11) is fixed to the arch foot bottom of the sleeve-reinforced steel arch frame (10) and the sleeve-reinforced steel arch frame bottom plate (7).

8. The arch foot fixing connection structure for tunnel lining reinforcement steel arch frame according to claim 7, characterized in that: Each of the lining reinforcement steel arch frames (10) corresponds to one of the steel plate grids, and the steel plate grids are arranged at intervals in the existing ditch.

9. The arch foot fixing connection structure for tunnel lining reinforcement steel arch frame according to claim 8, characterized in that: The ditch cover plate (6) is arranged in sections along the existing ditch.

10. The arch foot fixing connection structure for tunnel lining reinforcement steel arch frame according to claim 6, characterized in that: The steel plate grid, the ditch cover (6), the lining-reinforced steel arch frame bottom plate (7) and the arch foot bottom of the lining-reinforced steel arch frame (10) are fixedly connected by welding.

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