Shield segment behind-wall filling structure

Abstract

The utility model discloses a shield segment behind-wall filling structure which comprises a shield segment, anchor columns and a reinforcing mesh, the anchor columns are arranged on the outer wall of the shield segment in the direction of the four corner ends of the shield segment, clamping grooves are formed in the anchor columns, and the reinforcing mesh is hung on the four anchor columns and clamped in the clamping grooves. And a gap is formed between the reinforcing mesh and the outer wall of the shield segment. The shield segment back filling structure has the advantages that due to the arrangement of the anchor columns, the reinforcing mesh cannot move, the reinforcing mesh is always located between the outer wall of the shield segment and the surrounding rock of a roadway when high-strength cement mortar is poured, the bearing capacity of the segment back filling structure is improved, and the back filling structure has better strength and stability.

Description

Technical Field

[0001] The utility model relates to the technical field of shield segments, in particular to a shield segment wall backfilling structure. Background Art

[0002] At present, TBM (full-section tunnel boring machine) has been used in the safe and rapid excavation construction of coal mine tunnels. When TBM is excavating, rock breaking, rock loading, slag removal, support, and material transportation are carried out simultaneously, with high construction efficiency and good safety. The shield segment is the main component of the tunnel support, playing a role in supporting and resisting water and soil pressure. After the tunnel excavation is completed, the segment assembly begins. The segment assembly machine is installed on the shield support ring of the shield machine. The various actuators of the assembly machine grab, move, position, and bolt the segments to support the surface of the tunnel. After the segment assembly is completed, grouting backfill is performed between the outer wall of the segment and the rock mass. Since the ground stress of coal mine tunnels is greater than that of shallow buried tunnels, the traditional high-strength cement mortar filling is used, and the backfilling bearing capacity of the segment wall is insufficient, which poses certain safety hazards. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to improve the backfill bearing capacity of the pipe segment wall.

[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0005] A shield segment wall backfill structure comprises a shield segment, anchor columns and a steel mesh. The outer wall of the shield segment is provided with anchor columns along its four corner ends. The anchor columns are provided with slots. The steel mesh is hung on the four anchor columns and engaged in the slots, so that a gap exists between the steel mesh and the outer wall of the shield segment.

[0006] By setting the anchor column, the steel mesh will not move. When pouring high-strength cement mortar, the steel mesh is always between the outer wall of the shield segment and the surrounding rock of the tunnel, which improves the bearing capacity of the filling structure behind the segment wall and makes the filling structure behind the wall have better strength and stability.

[0007] Preferably, grouting holes are provided on the shield segments.

[0008] Preferably, the shield segments are prefabricated segments.

[0009] Preferably, the size of the steel mesh is substantially the same as the size of the shield segment.

[0010] Preferably, the steel mesh is always in a tensioned state.

[0011] Preferably, the opening direction of the slot on the anchor column is arranged away from the center of the shield segment.

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

[0013] By setting the anchor column, the steel mesh will not move. When pouring high-strength cement mortar, the steel mesh is always between the outer wall of the shield segment and the surrounding rock of the tunnel, which improves the bearing capacity of the filling structure behind the segment wall and makes the filling structure behind the wall have better strength and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the anchor column of the utility model embodiment;

[0016] Figure 3 It is a schematic diagram of the installation structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0017] In order to facilitate those skilled in the art to understand the technical solution of the utility model, the technical solution of the utility model is further explained in conjunction with the drawings in the specification.

[0018] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0019] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise clearly and specifically limited.

[0020] See also Figure 1 to Figure 2 The present embodiment discloses a backfill structure for a shield segment wall, comprising a shield segment 1, anchor columns 2, and a steel mesh 3. The outer wall of the shield segment 1 is provided with anchor columns 2 along its four corner ends. The anchor columns 2 are provided with slots 21, and the opening direction of the slots 21 is arranged away from the center of the shield segment 1. The steel mesh 3 is hung on the four anchor columns 2, and the four corner ends of the steel mesh 3 are respectively engaged in the slots 21 of each anchor column 2, so that there is a gap between the steel mesh 3 and the outer wall of the shield segment 1.

[0021] In this embodiment, the shield segment 1 is a prefabricated segment, and the size of the steel mesh 3 is substantially the same as that of the shield segment 1 .

[0022] Furthermore, the steel mesh 3 is always in a tensioned state, so that the steel mesh 3 can be stably engaged in the engaging groove 21 and will not fall off the anchor column 2 .

[0023] The working principle of this embodiment is as follows: Figure 3 In this embodiment, six groups of shield segment wall backfill structures are assembled to achieve tunnel support. There is a gap between the outer wall of the assembled filling structure and the tunnel surrounding rock 4. High-strength cement mortar is poured through the grouting holes (not shown) on the shield segment 1 to fill the gap between the outer wall of the shield segment 1 and the tunnel surrounding rock, forming a steel mesh-cement support structure 5 to achieve tunnel support.

[0024] In this embodiment, the anchor column 2 is provided to prevent the steel mesh 3 from moving. When high-strength cement mortar is poured, the steel mesh 3 is always between the outer wall of the shield segment 1 and the surrounding rock of the tunnel, thereby improving the bearing capacity of the filling structure behind the segment wall and making the filling structure behind the wall have better strength and stability.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0026] The above-described embodiments merely represent implementation methods of the utility model, and the protection scope of the utility model is not limited to the above-described embodiments. For those skilled in the art, several modifications and improvements can be made without departing from the concept of the utility model, and all of these belong to the protection scope of the utility model.

Claims

1. A shield segment wall backfill structure, characterized in that: It includes a shield segment, anchor columns, and a steel mesh. The outer wall of the shield segment is provided with anchor columns along its four corner ends. The anchor columns are provided with slots. The steel mesh is hung on the four anchor columns and engaged in the slots, so that there is a gap between the steel mesh and the outer wall of the shield segment.

2. A shield segment wall backfill structure according to claim 1, characterized in that: Grouting holes are arranged on the shield segments.

3. The shield segment wall backfill structure according to claim 1, characterized in that: The shield segments are prefabricated segments.

4. The shield segment wall backfill structure according to claim 1, characterized in that: The size of the steel mesh is the same as that of the shield segment.

5. The shield segment wall backfill structure according to claim 1, characterized in that: The steel mesh is always in a tensioned state.

6. The shield segment wall backfill structure according to claim 1, characterized in that: The opening direction of the slot on the anchor column is arranged away from the center of the shield segment.

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