Groove pressing construction device suitable for tunnel drainage blind pipe

Abstract

The utility model discloses a groove pressing construction device suitable for a tunnel drainage blind pipe. The fixing structure comprises a fixing framework and a pipeline bent groove, the fixing framework is of a rectangular frame structure formed by welding two pieces of vertical connecting angle steel and two pieces of transverse connecting flat steel, and the pipeline bent groove comprises a pipeline bent groove steel pipe and a reinforcing steel plate. The pipeline bent channel steel pipe is formed by pre-bending a steel pipe with the diameter consistent with that of a drainage blind pipe according to a preset radius and then cutting the steel pipe along the bending axis, the reinforcing steel plates are welded to the two side edges of the pipeline bent channel steel pipe respectively, and the radian and the arc length of the welding ends of the reinforcing steel plates are consistent with those of the side edges of the pipeline bent channel steel pipe. The reinforcing steel plate is fully welded with the side edge of the pipeline bent groove steel pipe, the two pieces of vertical connecting angle steel are respectively welded and connected with the two sides of the pipeline bent groove, and the end parts of the two pieces of transverse connecting flat steel are respectively provided with a bolt hole. The device is convenient and fast to assemble and disassemble, the formed drainage blind pipe pressing grooves are uniform in size and can be repeatedly used, and the construction cost can be reduced.

Description

Technical Field

[0001] The utility model relates to a grooving construction device for tunnel drainage blind pipes, which is a device for tunnel drainage blind pipe grooving construction and belongs to the technical field of tunnel construction. Background Art

[0002] Drainage blind pipes are an important measure in tunnel waterproofing and drainage. Among them, longitudinal and circumferential drainage blind pipes are arranged staggeredly and not connected. In the prior art, generally, the construction methods of overlapping up and down or grooving on the surface of the initial support shotcrete are adopted. The traditional construction methods have the defects that it is difficult to lay the waterproof board at the staggered positions of longitudinal and circumferential drainage blind pipes, and it is difficult to control the grooving size, resulting in cavities in the lining concrete, seriously affecting the quality of the lining concrete. Content of the Utility Model

[0003] Aiming at the above defects existing in the prior art, the utility model provides a grooving construction device for tunnel drainage blind pipes with a simple structure, which can improve the installation efficiency of drainage blind pipes and ensure the construction quality of lining concrete.

[0004] The utility model is realized by the following technical scheme: A grooving construction device for tunnel drainage blind pipes, characterized in that: it includes a fixed skeleton and a pipe grooving. The fixed skeleton is a rectangular frame structure formed by welding two vertical connecting angle steels and two horizontal connecting flat steels. The pipe grooving includes a pipe grooving steel pipe and a reinforcing steel plate. The pipe grooving steel pipe is formed by pre-bending a steel pipe with a diameter consistent with that of the drainage blind pipe according to a predetermined radius and then cutting along the bending axis. A reinforcing steel plate is welded on each of the two side edges of the pipe grooving steel pipe. The welded ends of the reinforcing steel plates are consistent with the radian and arc length of the side edges of the pipe grooving steel pipe. The reinforcing steel plates are fully welded to the side edges of the pipe grooving steel pipe. The two vertical connecting angle steels are respectively welded to the two sides of the pipe grooving. A bolt hole is provided at each end of the two horizontal connecting flat steels.

[0005] In the utility model, the bolt holes provided at the ends of the two horizontal connecting flat steels are used to fix the device. When the utility model is used, before the initial support shotcrete construction, fixing bolts are pre-set according to the positions of the bolt holes in the utility model and fixedly installed before the initial support shotcrete construction. During installation, it can be fixedly installed through the bolt holes on the fixed skeleton and the pre-set bolts, and removed after the shotcrete begins to set, thus forming a groove for the drainage blind pipe.

[0006] Furthermore, the fixed skeleton is connected and fixed to the fixing bolts reserved at the construction position through the bolt holes provided at the ends of its horizontal connecting flat steels.

[0007] Furthermore, for the convenience of construction, the reinforcing steel plates are flush with the ends of the pipe grooving steel pipes.

[0008] Further, for facilitating the removal after the initial setting of the concrete, the outer part of the pipe bending groove and the weld are polished.

[0009] The beneficial effects of the present utility model are as follows: The structure of the present utility model is simple, the installation and removal are convenient and fast, the sizes of the drainage blind pipe pressing grooves formed are unified and meet the requirements, which can effectively solve the defect that it is difficult to control the sizes of the grooves in the prior art when grooving on the surface of the shotcrete for the initial support, and can effectively solve the problem that it is difficult to lay the waterproof board at the staggered positions of the longitudinal and circumferential drainage blind pipes during tunnel construction. The present utility model is simple to manufacture, easy to obtain materials, has high structural strength, can be reused, and can reduce the construction cost. Description of the Drawings

[0010] Figure 1 is the plan view of the present utility model in the specific embodiment;

[0011] Figure 2 is the elevation view of the present utility model in the specific embodiment;

[0012] In the figure, 1. Pipe bending groove steel pipe, 2. Reinforcing steel plate, 3. Vertical connecting angle steel for the fixed skeleton, 4. Horizontal connecting flat steel for the fixed skeleton, 5. Bolt hole, 6. Fastening nut, 7. Fixed bolt, 8. Shotcrete for the initial support. Specific Embodiment

[0013] The present utility model will be further described below through non-limiting embodiments in conjunction with the drawings:

[0014] As shown in the drawings, a construction device for pressing grooves of a tunnel drainage blind pipe includes a fixed skeleton and a pipe bending groove. The fixed skeleton is a rectangular frame structure formed by welding two vertical connecting angle steels 3 and two horizontal connecting flat steels 4. The vertical connecting angle steel 3 is a 50×50×5 mm angle steel, and the horizontal connecting flat steel 4 is a 40×5 mm flat steel. One bolt hole 5 is provided at each end of the two horizontal connecting flat steels 4 for fastening the fixed skeleton. The pipe bending groove includes a pipe bending groove steel pipe 1 and two reinforcing steel plates 2. The pipe bending groove steel pipe 1 is formed by pre-bending a steel pipe with a diameter consistent with the diameter of the drainage blind pipe according to a predetermined radius and then cutting along the bending axis. One reinforcing steel plate 2 is welded to each side of the pipe bending groove steel pipe 1. The welding ends of the reinforcing steel plates 2 are consistent with the radian and arc length of the sides of the pipe bending groove steel pipe 1, and the reinforcing steel plates 2 are fully welded to the sides of the pipe bending groove steel pipe 1. The two vertical connecting angle steels 3 are respectively welded and connected to the two sides of the pipe bending groove. All welds are polished flat and smooth, and the outside of the pipe bending groove is also polished smoothly.

[0015] For facilitating the construction, preferably, the reinforcing steel plates 2 are flush with the ends of the pipe bending groove steel pipe 1.

[0016] Before the use of the utility model, a release agent needs to be applied to the outside of the pipe bend groove. When the utility model is in use, before the construction of the initial support shotcrete, fixing bolts 7 are pre-set at the construction position according to the positions of the bolt holes 5 on the fixing skeleton in the utility model. It is fixedly installed before the construction of the initial support shotcrete. During installation, it can be installed and fixed through the bolt holes 5 on the fixing skeleton and the pre-set fixing bolts 7. After the shotcrete begins to set, the device is removed, and a drainage blind pipe groove is formed.

[0017] The structure of the utility model is simple, the sizes of the drainage blind pipe grooves are unified and meet the requirements, which is beneficial to improving the construction quality of the lining concrete. The utility model has high structural strength, can be reused multiple times, and can reduce the construction cost.

[0018] The other parts in this embodiment are all prior arts and will not be elaborated here.

Claims

1. A device for constructing blind pipe trenches for tunnel drainage, characterized by: It includes a fixed frame and a pipe bend. The fixed frame is a rectangular frame structure formed by welding two vertical connecting angle steels and two horizontal connecting flat steels. The pipe bend includes a pipe bend steel pipe and a reinforcing steel plate. The pipe bend steel pipe is formed by pre-bending a steel pipe with a diameter consistent with the diameter of the drainage blind pipe according to a predetermined radius and cutting along the bending axis. A piece of the reinforcing steel plate is welded to both sides of the pipe bend steel pipe respectively. The welding end of the reinforcing steel plate is consistent with the curvature and arc length of the side of the pipe bend steel pipe. The reinforcing steel plate is fully welded to the side of the pipe bend steel pipe. Two vertical connecting angle steels are respectively welded to both sides of the pipe bend, and a bolt hole is provided at the end of each of the two horizontal connecting flat steels.

2. The device for constructing blind pipe trenches for tunnel drainage according to claim 1 is characterized in that: The fixed frame is connected and fixed with the fixing bolts reserved at the construction position through the bolt holes arranged at the ends of the transverse connecting flat steel.

3. The device for constructing blind pipe trenches for tunnel drainage according to claim 1 or 2, characterized in that: The reinforcing steel plate is flush with the end of the pipeline bent groove steel pipe.

4. The device for constructing blind pipe trenches for tunnel drainage according to claim 3 is characterized in that: The outside of the pipe bend and the weld are polished.

Images