Mesh structure for tunnel shotcreting

Abstract

The utility model discloses a mesh structure for tunnel shotcrete, which comprises a reinforcing mesh and a fixing component which is arranged on the reinforcing mesh and is used for being detachably connected with an anchor rod, the reinforcing mesh comprises a plurality of mesh units which are arranged on the same layer and are provided with openings on four sides, the end parts of the four sides of each mesh unit are hook-shaped, and the fixing component is arranged on the reinforcing mesh. According to the reinforcing mesh, the contact area of connecting points between the mesh units is increased through the design of the hooks, so that the mesh units are connected more tightly, the situation that the mesh units move or fall off is effectively avoided, the stability of the whole structure of the reinforcing mesh is effectively improved, and the service life of the reinforcing mesh is prolonged. The integrity and the safety of the tunnel structure are further improved; the reinforcing mesh is connected with the anchor rod through the fixing assembly which is detachably connected, the position of the reinforcing mesh can be conveniently adjusted in real time, complex welding operation is not needed, the construction time is greatly saved, and the flexibility and the construction efficiency of tunnel construction are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a mesh structure for tunnel shotcrete. Background Art

[0002] The process of urbanization has accelerated the growth of traffic demand between and within cities. In order to ease the pressure of ground traffic and improve traffic efficiency, tunnels have been widely used as important transportation facilities. In the process of tunnel excavation, in order to ensure the stability of the tunnel during the excavation process, prevent deformation and collapse of the surrounding rock, and provide safety for subsequent construction, initial support must be carried out immediately after tunnel excavation. After the excavation is completed, concrete is sprayed to form a protective layer, and then anchor rods are driven into the structural layer, and steel mesh and steel frames are installed to form the initial support skeleton. Concrete is sprayed again to wrap all the supports to form a combined support.

[0003] During the construction of existing tunnel steel mesh, the steel mesh and anchor rods are usually connected by welding. Once this connection is completed, it is difficult to adjust the position or angle of the steel mesh. If it is found that the position or angle of the steel mesh needs to be adjusted during the construction process, it takes a lot of time and labor to disassemble and re-weld. During the construction process, the overlap between the steel meshes is usually completed by staggered welding or tying the ends of adjacent steel mesh sheets, but this overlap method has the problem of insufficient connection stability, which is prone to loosening or slipping when subjected to external loads, and a lot of time and labor are required to position and fix the steel mesh during the construction process, thereby reducing construction efficiency. Summary of the invention

[0004] The purpose of the utility model is to provide a mesh structure for tunnel shotcrete, so as to solve the problems raised in the above-mentioned background technology of the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A mesh structure for tunnel shotcrete comprises a steel mesh and a fixing assembly arranged on the steel mesh for detachably connecting with an anchor rod. The steel mesh comprises: a plurality of mesh units arranged in the same layer and open on four sides, the four ends of the mesh units are all hook-shaped, and the ends of adjacent mesh units are hooked and welded to each other.

[0007] Preferably, the mesh unit comprises: a plurality of mutually parallel longitudinal reinforcements and a plurality of mutually parallel transverse reinforcements, the transverse reinforcements and the longitudinal reinforcements are cross-welded, both ends of the transverse reinforcements not located at the edge are provided with a first hook bent toward the tunnel rock wall side, both ends of the longitudinal reinforcements not located at the edge are provided with a second hook bent away from the tunnel rock wall side, and adjacent mesh units are hooked and welded by the first hook or the second hook.

[0008] Preferably, two laterally adjacent mesh units are connected by a first hook, and the first hook of the mesh unit is hooked to the outermost longitudinal reinforcement of the corresponding other steel mesh. Two longitudinally adjacent mesh units are connected by a second hook, and the second hook of the mesh unit is hooked to the outermost transverse reinforcement of the corresponding other steel mesh.

[0009] Preferably, the first hook and the second hook are both 180° hooks.

[0010] Preferably, a wire mesh is provided on the side of the steel mesh away from the tunnel rock wall, and the wire mesh is tied to the second hook.

[0011] Preferably, the fixing assembly includes: a C-shaped clamping joint clamped with the mesh unit, and a mounting piece sleeved on the outside of the anchor rod, the clamping joint is made of rubber or silicone, and the internal clamping groove of the clamping joint is adapted to the shape of the longitudinal or transverse reinforcement.

[0012] Preferably, the mounting member includes a mounting head connected to the clamping joint, a plurality of elastic locking plates evenly arranged around the end of the mounting head away from the tunnel rock wall, and a mounting sleeve threadedly connected to the outer surface of the mounting head, a conical cavity for collecting the ends of the plurality of elastic locking plates at one end of the interior of the mounting sleeve, and a minimum inner diameter of the conical cavity is slightly larger than the diameter of the anchor rod.

[0013] Preferably, an anti-skid pad with anti-skid patterns is provided on the inner side of the elastic locking piece.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] 1. The utility model sets the four ends of the mesh unit into a hook shape, and the ends of the adjacent mesh units are hooked and welded to each other. The hook design increases the contact area of ​​the connection points between the mesh units, making the mesh units more tightly connected, thereby forming a more firm and stable connection, effectively avoiding the displacement or falling off of the mesh units, and the mesh units work better together to bear the external load together, effectively improving the stability of the overall structure of the steel mesh, and further improving the integrity and safety of the tunnel structure; construction personnel can quickly locate and hook adjacent mesh units, making the installation of the steel mesh easier and faster, thereby greatly improving the construction efficiency;

[0016] 2. The utility model connects the steel mesh with the anchor rod by using a detachable fixed component, which facilitates the real-time position adjustment of the steel mesh without complicated welding operations, greatly saves construction time, and improves the flexibility and efficiency of tunnel construction;

[0017] 3. The utility model can conveniently and quickly fix the fixing assembly on the mesh unit through the C-shaped clamping joint. By rotating the installation sleeve, the conical cavity of the installation sleeve controls the expansion or contraction of the elastic locking piece, so that the elastic locking piece of the installation piece can be elastically attached to the outside of the anchor rod, thereby realizing the locking, fixing and unlocking of the mesh unit and the anchor rod, and enhancing the connection stability between the steel mesh and the anchor rod. If the elastic locking piece of the installation piece does not fit the outside of the anchor rod, the position of the steel mesh can be adjusted in real time, which is convenient to operate, flexible, improves construction efficiency and reduces labor costs.

[0018] 4. The utility model sets a steel mesh, and the fine mesh of the steel mesh can effectively capture and fix concrete particles to prevent the concrete from scattering around during the spraying process. The elasticity of the steel mesh can also exert a certain pressure on the concrete, so that the concrete fits more closely to the tunnel wall, reducing the gap between the concrete and the tunnel wall and rebound splashing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a mesh structure for tunnel shotcrete;

[0021] Figure 2 A schematic diagram of a mesh unit structure of a mesh structure for tunnel shotcrete;

[0022] Figure 3 A schematic diagram of a fixed component structure of a mesh structure for tunnel shotcrete;

[0023] Figure numerals: 1-steel mesh, 2-fixing assembly, 3-mesh unit, 4-transverse reinforcement, 5-longitudinal reinforcement, 6-first hook, 7-second hook, 8-clamp joint, 9-slot, 10-installation head, 11-elastic locking plate, 12-installation sleeve, 13-anti-slip pad. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present utility model, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0027] In addition, the terms “first”, “second”, “third”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0028] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connection", etc. 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0031] like Figure 1 As shown, a mesh structure for tunnel shotcrete comprises a steel mesh 1 and a fixing assembly 2 arranged on the steel mesh 1 and used for detachably connecting with an anchor rod. The steel mesh 1 comprises: a plurality of mesh units 3 arranged in the same layer and open on four sides, the four ends of the mesh units 3 are all hook-shaped, and the ends of adjacent mesh units 3 are hooked and welded to each other.

[0032] In practice, construction workers can fix the mesh unit 3 on the anchor rod of the tunnel through the fixing component 2, and then hook the adjacent mesh units 3 with each other through the hooks at the ends, so as to achieve rapid positioning and temporary connection of the mesh unit 3, which is convenient for subsequent welding by construction workers, making the installation of the steel mesh easier and faster, thereby greatly improving the construction efficiency. The hook design increases the contact area of ​​the connection points between the mesh units 3, which can make the mesh units 3 connected more tightly, thereby forming a more firm and stable connection, effectively avoiding the displacement or falling off of the mesh units 3, and the mesh units 3 work better together to jointly bear external loads, effectively improving the stability of the overall structure of the steel mesh 1, and further improving the integrity and safety of the tunnel structure. The mesh unit 3 is connected to the anchor rod by a detachable fixing component 2, which is convenient for real-time position adjustment of the mesh unit 3 without complicated welding operations, thereby improving the flexibility and efficiency of tunnel construction.

[0033] like Figure 2 As shown, the mesh unit 3 includes: a plurality of mutually parallel longitudinal ribs 5 and a plurality of mutually parallel transverse ribs 4, the transverse ribs 4 and the longitudinal ribs 5 are cross-welded, both ends of the transverse ribs 4 not located at the edge are provided with first hooks 6 bent toward the tunnel rock wall side, both ends of the longitudinal ribs 5 not located at the edge are provided with second hooks 7 bent away from the tunnel rock wall side, adjacent mesh units 3 are hooked and welded by the first hooks 6 or the second hooks 7; the first hooks 6 and the second hooks 7 are both 180° hooks.

[0034] Among them, the specific installation method of the mesh unit is as follows Figure 1As shown, two laterally adjacent mesh units 3 are hooked together by a first hook 6, and the first hook 6 of the mesh unit 3 is hooked to the longitudinal reinforcement 5 at the outermost edge of the corresponding other steel mesh 1. Two longitudinally adjacent mesh units 3 are hooked together by a second hook 7, and the second hook 7 of the mesh unit 3 is hooked to the transverse reinforcement 4 at the outermost edge of the corresponding other steel mesh 1.

[0035] In order to reduce the gap between concrete and the tunnel wall and rebound splash, a wire mesh (not shown) is provided on the side of the steel mesh sheet 1 away from the tunnel rock wall, and the wire mesh is tied to the second hook 7.

[0036] like Figure 3 As shown, the fixing assembly 2 includes: a C-shaped clamping joint 8 clamped with the mesh unit 3, and a mounting piece sleeved on the outside of the anchor rod, the clamping joint 8 is made of rubber or silicone, and the internal clamping groove 9 of the clamping joint 8 is adapted to the shape of the longitudinal reinforcement 5 or the transverse reinforcement 4; the mounting piece includes: a mounting head 10 connected to the clamping joint 8, a plurality of elastic locking pieces 11 evenly arranged around the end of the mounting head 10 away from the tunnel rock wall, and a mounting sleeve 12 threadedly connected to the outer surface of the mounting head 10, a conical cavity is provided at one end of the mounting sleeve 12 for collecting the ends of the plurality of elastic locking pieces 11, and the minimum inner diameter of the conical cavity is slightly larger than the diameter of the anchor rod.

[0037] In order to ensure the fixing effect between the fixing assembly and the anchor rod and to increase the friction between the elastic locking piece and the anchor rod, an anti-skid pad 13 with anti-skid patterns is provided on the inner side of the elastic locking piece 11 .

[0038] During use, construction workers can quickly and conveniently fix the mounting piece on the mesh unit 3 through the C-shaped clamping joint 8. When installing the mesh unit 3, rotate the mounting sleeve 12 so that the conical cavity of the mounting sleeve 12 controls the expansion of the elastic locking piece 11, and then insert the anchor rod into the mounting head 10 and the mounting sleeve 12, and rotate the mounting sleeve 12 in the opposite direction again so that the conical cavity of the mounting sleeve 12 controls the contraction of the elastic locking piece 11, so that the elastic locking piece 11 of the mounting piece can elastically fit on the outside of the anchor rod, thereby realizing the locking and fixation of the mesh unit 3 and the anchor rod, and enhancing the connection stability between the steel mesh and the anchor rod. When adjusting the position of the mesh unit 3, it is only necessary to rotate the mounting sleeve 12 so that the elastic locking piece 11 does not fit on the outside of the anchor rod. The operation is convenient and flexible, which improves the construction efficiency and reduces the labor cost.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described by referring to the preferred embodiments of the utility model, those skilled in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the utility model as defined in the appended claims.

Claims

1. A mesh structure for tunnel shotcrete, Features: The invention comprises a steel mesh (1) and a fixing assembly (2) arranged on the steel mesh (1) and used for being detachably connected to an anchor rod, wherein the steel mesh (1) comprises: a plurality of mesh units (3) arranged in the same layer and having four openings, the four ends of the mesh units (3) are all hook-shaped, and the ends of adjacent mesh units (3) are hooked and welded to each other.

2. A mesh structure for tunnel shotcrete according to claim 1, Features: The mesh unit (3) comprises: a plurality of mutually parallel longitudinal ribs (5) and a plurality of mutually parallel transverse ribs (4); the transverse ribs (4) and the longitudinal ribs (5) are cross-welded; both ends of the transverse ribs (4) not located at the edge are provided with first hooks (6) bent toward the tunnel rock wall side; both ends of the longitudinal ribs (5) not located at the edge are provided with second hooks (7) bent away from the tunnel rock wall side; adjacent mesh units (3) are hooked and welded via the first hooks (6) or the second hooks (7).

3. A mesh structure for tunnel shotcrete according to claim 1, Features: Two mesh units (3) adjacent to each other in the transverse direction are hooked together by a first hook (6), and the first hook (6) of the mesh unit (3) is hooked to the longitudinal reinforcement (5) at the outermost edge of the corresponding other steel mesh (1); two mesh units (3) adjacent to each other in the longitudinal direction are hooked together by a second hook (7), and the second hook (7) of the mesh unit (3) is hooked to the transverse reinforcement (4) at the outermost edge of the corresponding other steel mesh (1).

4. A mesh structure for tunnel shotcrete according to claim 2, Features: The first hook (6) and the second hook (7) are both 180° hooks.

5. A mesh structure for tunnel shotcrete according to claim 2, Features: A steel wire mesh is provided on the side of the steel mesh sheet (1) away from the tunnel rock wall, and the steel wire mesh is tied to the second hook (7).

6. A mesh structure for tunnel shotcrete according to claim 2, Features: The fixing assembly (2) comprises: a C-shaped clamping joint (8) clamped with the mesh unit (3), and a mounting piece sleeved on the outside of the anchor rod, the clamping joint (8) is made of rubber or silicone, and the internal clamping groove (9) of the clamping joint (8) is adapted to the shape of the longitudinal reinforcement (5) or the transverse reinforcement (4).

7. A mesh structure for tunnel shotcrete according to claim 6, Features: The mounting member comprises: a mounting head (10) connected to the clamping joint (8), a plurality of elastic locking pieces (11) evenly arranged around an end of the mounting head (10) away from the tunnel rock wall, and a mounting sleeve (12) threadedly connected to the outer surface of the mounting head (10), wherein a conical cavity for collecting the ends of the plurality of elastic locking pieces (11) is provided at one end inside the mounting sleeve (12), and the minimum inner diameter of the conical cavity is greater than the diameter of the anchor rod.

8. A mesh structure for tunnel shotcrete according to claim 7, Features: The inner side surface of the elastic locking piece (11) is provided with an anti-skid pad (13) with anti-skid patterns.

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