Concrete pouring device for TBM secondary lining

Abstract

The utility model relates to the technical field of pipeline supporting, in particular to a concrete pouring device for TBM secondary lining. Comprising a steel framework and a protection assembly, the protection assembly comprises a first protection layer, a second protection layer and a third protection layer, the outer side wall of the steel framework is attached to the inner wall of a pipeline, the inner side wall of the steel framework is attached to the first protection layer, and the side wall of the side, away from the steel framework, of the first protection layer is attached to the second protection layer. The side wall of the side, away from the first protective layer, of the second protective layer is attached to the third protective layer. The fiber and cement paste layer and the fine sand layer and the fiber layer are arranged on the inner side of the steel framework, the fiber and cement paste layer can be better attached to the inner side wall of the steel framework and is stably connected with the fine sand layer, and poured concrete and the fine sand layer are condensed and fixed into a whole after being mixed, so that the concrete is not prone to falling off on the inner side of the steel framework.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline support, in particular to a concrete pouring device for TBM secondary lining. Background Art

[0002] TBM, also known as roadheader, is used for parallel and continuous operations of construction processes such as excavation, support, and slag removal. It is a factory-based assembly line tunnel construction equipment that integrates mechanical, electrical, hydraulic, optical, and gas systems. It has the advantages of fast excavation speed, environmental protection, and high comprehensive benefits. TBM can also be used for pipeline excavation.

[0003] During pipeline construction, initial support is required after the tunnel boring machine excavates. The existing initial support is usually sprayed concrete on the inner wall of the pipeline. After the deformation of the initial support tends to be stable, secondary lining is required. The secondary lining and the initial support together constitute a composite lining, which can strengthen the support, optimize the drainage system, and facilitate the installation of communication, lighting, monitoring and other facilities. The secondary lining is usually a reinforced concrete structure, which requires a steel frame to be set on the inner wall of the pipeline before pouring concrete. However, since the inner wall of the steel frame is relatively smooth, the concrete on the inner side of the steel frame is easy to fall off after the concrete is poured into the steel frame.

[0004] Therefore, there is an urgent need to provide a TBM secondary lining concrete pouring device, which, compared with the prior art, prevents the concrete from falling off easily on the inner side of the steel frame. Utility Model Content

[0005] The utility model solves the technical problems existing in the prior art and provides a concrete pouring device for secondary lining of a TBM.

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

[0007] A concrete pouring device for secondary lining of a TBM comprises a steel frame and a protective component, wherein the protective component comprises a first protective layer, a second protective layer and a third protective layer, the outer side wall of the steel frame is in contact with the inner wall of a pipeline, the inner side wall of the steel frame is in contact with the first protective layer, the side wall of the first protective layer away from the steel frame is in contact with the second protective layer, and the side wall of the second protective layer away from the first protective layer is in contact with the third protective layer.

[0008] Furthermore, the first protective layer is made of fiber-mixed cement slurry.

[0009] Furthermore, the second protective layer is made of fine sand.

[0010] Furthermore, a side wall of the fine sand layer that is in contact with the third protective layer is a concave-convex surface.

[0011] Furthermore, the third protective layer is made of fiber material.

[0012] Furthermore, the steel skeleton is provided in plurality, and a plurality of steel bars are provided between adjacent steel skeletons.

[0013] Furthermore, an end portion of the third protective layer extends out of the second protective layer, and a portion of the third protective layer extending out of the second protective layer is fixedly connected to the steel bar.

[0014] Furthermore, the steel skeleton includes a first connecting plate, a second connecting plate and a third connecting plate, the first connecting plate and the second connecting plate are coaxially arranged, the first connecting plate is located outside the second connecting plate, and the third connecting plate is fixedly connected between the first connecting plate and the second connecting plate.

[0015] Furthermore, the third connecting piece is vertically connected to the first connecting piece and the second connecting piece.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The utility model arranges a fiber and cement slurry layer, a fine sand layer and a fiber layer on the inner side of the steel frame. The fiber and cement slurry layer can better fit the inner wall of the steel frame and is firmly connected to the fine sand layer. The poured concrete is mixed with the fiber layer and solidified and fixed with the fine sand layer to form a whole, so that the concrete is not easy to fall off on the inner side of the steel frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the front view of the utility model.

[0019] Figure 2 It is a side view of the utility model.

[0020] Figure 3 It is a schematic cross-sectional view of the utility model along the diameter direction of the steel skeleton.

[0021] Description of reference numerals:

[0022] 1. Steel skeleton; 11. First connecting plate; 12. Second connecting plate; 13. Third connecting plate; 2. Protection assembly; 21. First protection layer; 22. Second protection layer; 23. Third protection layer; 3. Rebar. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be clearly described below in conjunction with the accompanying drawings. Obviously, the described embodiments are not all embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model. It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", etc. is based on the orientation or position relationship shown in the accompanying drawings. It is only for the convenience of describing the utility model and simplifying the description. It 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 utility model.

[0024] like Figure 1 , Figure 2 As shown, the utility model provides a concrete pouring device for secondary lining of TBM, comprising a plurality of steel skeletons 1, a plurality of steel bars 3 and a plurality of protective components 2, wherein the plurality of steel skeletons 1 are arranged at intervals along the length direction of the pipeline, and two adjacent steel skeletons 1 are installed and connected by a plurality of steel bars 3, and a protective component 2 is arranged on the inner wall of each steel skeleton 1, and the side wall of the steel skeleton 1 away from the inner wall of the pipeline is the inner wall.

[0025] like Figure 1 , Figure 3 As shown, the steel skeleton 1 is annular, and the cross-section of the steel skeleton 1 along its diameter direction is H-shaped. The steel skeleton 1 specifically includes a first connecting piece 11, a second connecting piece 12 and a third connecting piece 13. The first connecting piece 11 and the second connecting piece 12 are both cylindrical, and the first connecting piece 11 and the second connecting piece 12 are coaxially arranged. The second connecting piece 12 is located inside the first connecting piece 11. The first connecting piece 11 and the second connecting piece 12 are spaced apart, and the third connecting piece 13 is fixedly connected between the first connecting piece 11 and the second connecting piece 12. The third connecting piece 13 is annular, and the third connecting piece 13 is perpendicular to the first connecting piece 11, and the third connecting piece 13 is also perpendicular to the second connecting piece 12; a protective component 2 is arranged on the side wall of the second connecting piece 12 away from the third connecting piece 13.

[0026] The protective assembly 2 includes a first protective layer 21, a second protective layer 22 and a third protective layer 23. The first protective layer 21 is attached to the side wall of the second connecting piece 12 away from the third connecting piece 13. The second protective layer 22 is attached to the side wall of the first protective layer 21 away from the second connecting piece 12. The third protective layer 23 is attached to the side wall of the second protective layer 22 away from the first protective layer 21. The widths of the first protective layer 21 and the second protective layer 22 are the same as the width of the steel frame 1. The width of the third protective layer 23 is greater than the width of the steel frame 1, that is, both ends of the third protective layer 23 extend out of the two ends of the steel frame 1 and adhere to the steel bars 3.

[0027] The first protective layer 21 is a fiber and cement slurry layer, that is, it is made of fiber mixed with cement slurry. The fiber and cement slurry layer has good impermeability. Mixing fiber in cement slurry can effectively prevent the segregation of cement slurry, improve the overall uniformity, and also play a role in blocking capillary cracks in cement slurry. The fiber and cement slurry layer can fit the metal surface of the inner wall of the steel skeleton 1 well; the second protective layer 22 is a fine sand layer, that is, a fine sand material. The side of the fine sand layer and the third protective layer 23 that fit together is set as an action surface. The action surface is provided with many depressions and many protrusions to form a concave-convex surface with good fit; the third protective layer 23 is a fiber layer, that is, a fiber material. In actual construction, the fiber layer is mixed with the poured concrete, and the concrete after the mixed fiber layer is fitted with the fine sand layer. Since the action surface of the fine sand layer is a concave-convex surface, the friction is strong. At the same time, the poured concrete is also mixed with a fiber layer, which has high impermeability, so that the poured concrete is not easy to fall off on the inner side of the steel skeleton 1.

[0028] The utility model provides a construction operation of a concrete pouring device for secondary lining of a TBM: a steel frame 1 is arranged in close contact with the inner wall of a pipeline, a steel bar 3 is installed between two adjacent steel frames 1, a fiber and cement slurry layer is laid on the inner wall of the steel frame 1, and then a fine sand layer and a fiber layer are laid before the fiber and cement slurry layer solidifies, a portion of the fiber layer extending out of the fine sand layer is fixed on the steel bar 3, and then concrete is poured, the concrete slurry is solidified and fixed to the fine sand layer and the fiber layer into a whole, so that the concrete is not easy to fall off on the inner side of the steel frame 1.

[0029] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A concrete pouring device for TBM secondary lining, It is characterized in that It includes a steel frame and a protective component, wherein the protective component includes a first protective layer, a second protective layer and a third protective layer. The outer side wall of the steel frame is in contact with the inner wall of the pipeline, the inner side wall of the steel frame is in contact with the first protective layer, the side wall of the first protective layer away from the steel frame is in contact with the second protective layer, and the side wall of the second protective layer away from the first protective layer is in contact with the third protective layer.

2. A TBM secondary lining concrete pouring device according to claim 1, It is characterized in that The second protective layer is made of fine sand and is set as a fine sand layer.

3. A TBM secondary lining concrete pouring device according to claim 2, It is characterized in that The side wall of the fine sand layer that adheres to the third protective layer is a concave-convex surface.

4. A TBM secondary lining concrete pouring device according to claim 1, It is characterized in that The third protective layer is made of fiber material.

5. A TBM secondary lining concrete pouring device according to claim 4, It is characterized in that The steel skeletons are provided in plurality, and a plurality of steel bars are provided between adjacent steel skeletons.

6. A TBM secondary lining concrete pouring device according to claim 5, It is characterized in that An end portion of the third protective layer extends out of the second protective layer, and a portion of the third protective layer extending out of the second protective layer is fixedly connected to the steel bar.

7. A TBM secondary lining concrete pouring device according to claim 1, It is characterized in that The steel skeleton includes a first connecting plate, a second connecting plate and a third connecting plate. The first connecting plate and the second connecting plate are coaxially arranged. The first connecting plate is located outside the second connecting plate. The third connecting plate is fixedly connected between the first connecting plate and the second connecting plate.

8. A TBM secondary lining concrete pouring device according to claim 7, It is characterized in that The third connecting piece is vertically connected to the first connecting piece and the second connecting piece.

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