Vacuumizing device for tunnel secondary lining concrete grouting with mold

Abstract

The utility model discloses a vacuumizing device for tunnel secondary lining concrete grouting with a mold. A support is connected with an integrated three-way pipe and a control box in a bolted mode. The vacuum machine pipeline is locked and communicated with the main pipe of the integrated three-way pipe through a hose; a vacuum electromagnetic valve is arranged on three branch pipes of the integrated three-way pipe; a branch pipe above the vacuum electromagnetic valve is connected with a slurry outlet electromagnetic valve; the other opening of the slurry outlet electromagnetic valve is communicated with a slurry outlet pipe; the slurry outlet pipe is communicated with the slurry return tank; pipe orifices at the upper ends of three branch pipes of the integrated three-way pipe are communicated with a pressure maintaining electromagnetic valve bolted with the connecting sleeve through a transparent steel wire pipe; a grouting positioning ring on the connecting sleeve is in bolted connection with the secondary lining trolley; the grouting pipe penetrates through the grouting positioning ring and the connecting sleeve to be connected with the pressure maintaining electromagnetic valve and perpendicularly abuts against the waterproof plate face, the electromagnetic part is connected with the controller, the controller is controlled by a remote controller, and the device has the advantages of being simple in structure, low in cost, high in operation applicability, capable of remotely controlling opening and closing of vacuum and grouting, safe and reliable. The method is suitable for tunnel secondary lining concrete in-mold vacuum grouting engineering.

Description

Technical Field

[0001] The utility model belongs to the field of construction machinery for hollowing out and grouting behind secondary lining concrete of tunnel engineering, and particularly relates to a vacuuming device for grouting secondary lining concrete of tunnel with a mold. Background Art

[0002] With the rapid development of high-speed railways, bridge and tunnel projects account for an increasingly high proportion of railway projects. The existing tunnel secondary lining concrete construction process involves pouring concrete layer by layer, then topping the vault to achieve the effect of no voids between the concrete and the primary support concrete. However, after testing and verification, it was found that it was difficult to ensure that no voids occurred in the vault in some construction sections. Some construction units have adopted measures such as reserving grouting pipes or grouting with grouting pipes in a formwork, which has achieved certain results. It has been verified that most tunnel secondary lining concrete with formwork grouting should not have voids behind it, but there are still problems such as grouting difficulties, long grouting time, and partial grouting of the vault with voids. The tunnel secondary lining concrete vacuum grouting construction method with formwork provides a new method for grouting with formwork, but how to solve the difficulties of manual operation due to the large number of vacuum pipes and the inconvenience of high-altitude operation of the secondary lining trolley platform has become a new problem.

[0003] In view of the above-mentioned defects, how to solve the centralized intelligent operation of vacuum pipelines in the vacuum grouting construction of tunnel secondary lining concrete with formwork requires a new structure to solve this problem. Summary of the Invention

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a vacuum extraction device for tunnel secondary lining concrete grouting with a mold, which has the characteristics of simple structure, low cost, easy operation, good safety, good versatility and improved efficiency.

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

[0006] A vacuum pumping device for tunnel secondary lining concrete grouting with a mold comprises a bracket (13), the bracket (13) being bolted to an integrated three-way pipe (11) and a control box (14); a vacuum machine (1) pipeline is connected to the main pipe of the integrated three-way pipe (11) through a hose (2); a vacuum electromagnetic valve (9) is provided on three branch pipes of the integrated three-way pipe (11); a slurry discharge electromagnetic valve (8) is connected to the branch pipe above the vacuum electromagnetic valve (9); the other branch pipe of the slurry discharge electromagnetic valve (8) is connected to the other branch pipe of the vacuum electromagnetic valve (9); The outlet is connected to the slurry outlet pipe (10); the slurry outlet pipe (10) is connected to the slurry return tank (12); the upper ends of the three branch pipes of the integrated tee pipe (11) are connected to the pressure-maintaining electromagnetic valve (6) bolted to the connecting sleeve (3) through the transparent steel wire tube (7); the grouting positioning ring (4) on the connecting sleeve (3) is bolted to the secondary lining trolley; the grouting pipe (5) passes through the grouting positioning ring (4) and the connecting sleeve (3) and is connected to the pressure-maintaining electromagnetic valve (6), and is vertically pressed against the waterproof board surface.

[0007] The pressure-maintaining electromagnetic valve (6), the slurry-discharging electromagnetic valve (8), the vacuum electromagnetic valve (9) and the control box (14) are connected via cables and signal lines, and the control box (14) and the remote controller (15) transmit signals wirelessly.

[0008] The integrated three-way pipe (11) is a steel pipe with an open front end and a closed rear end, and three tees are arranged in the middle, and another tee is arranged in the middle of the straight pipe of each tee.

[0009] The grouting pipe (5) is made of cement-based RPC material, is hollow in the middle, has a flat head at the lower end, and a cross-concave shape at the upper end.

[0010] The connecting hose (2), transparent steel wire hose (7), and slurry outlet pipe (10) are transparent plastic hoses, and an annular steel wire skeleton is arranged inside the plastic.

[0011] A diameter change is provided at the connection between the transparent steel wire tube (7) and the pressure-maintaining electromagnetic valve (6).

[0012] The beneficial effects of the utility model are:

[0013] 1. Through the overall sealing of grouting pipe, transparent steel wire pipe, integrated tee pipe, connecting hose, vacuum machine, secondary lining concrete and secondary lining trolley, the void between the waterproof board and the secondary lining concrete and the pipeline form a relatively independent space, creating conditions for vacuum extraction.

[0014] 2. By controlling the electric switches of the pressure-maintaining electromagnetic valve, slurry-discharging electromagnetic valve, vacuum electromagnetic valve, etc., comprehensive remote control conversion of vacuum extraction, slurry-discharging conversion, pressure maintenance and other states can be achieved, realizing fast and efficient grouting state conversion and providing good working conditions for grouting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front schematic diagram of the utility model.

[0016] Among them, 1 is a vacuum machine, 2 is a connecting hose, 3 is a connecting sleeve, 4 is a grouting positioning ring, 5 is a grouting pipe, 6 is a pressure-maintaining electromagnetic valve, 7 is a transparent steel wire tube, 8 is a slurry discharge electromagnetic valve, 9 is a vacuum electromagnetic valve, 10 is a slurry discharge pipe, 11 is an integrated three-way pipe, 12 is a slurry return tank, 13 is a bracket, 14 is a control box, 15 is a remote control; 16 is a secondary lining trolley; 17 is secondary lining concrete. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] like Figure 1As shown, a vacuum extraction device for tunnel secondary lining concrete grouting with a mold comprises a bracket (13), the bracket (13) being bolted to an integrated three-way pipe (11) and a control box (14); a vacuum machine (1) pipeline is connected to the main pipe of the integrated three-way pipe (11) through a hose (2); a vacuum electromagnetic valve (9) is provided on each of the three branch pipes of the integrated three-way pipe (11); a slurry discharge electromagnetic valve (8) is connected to the branch pipe above the vacuum electromagnetic valve (9); the slurry discharge electromagnetic valve (8) The other port is connected to the slurry outlet pipe (10); the slurry outlet pipe (10) is connected to the slurry return tank (12); the upper ends of the three branch pipes of the integrated three-way pipe (11) are connected to the pressure-maintaining electromagnetic valve (6) bolted to the connecting sleeve (3) through the transparent steel wire tube (7); the grouting positioning ring (4) on the connecting sleeve (3) is bolted to the second lining trolley; the grouting pipe (5) passes through the grouting positioning ring (4) and the connecting sleeve (3) and is connected to the pressure-maintaining electromagnetic valve (6), and is vertically pressed against the waterproof board surface.

[0019] The pressure-maintaining electromagnetic valve (6), the slurry-discharging electromagnetic valve (8), the vacuum electromagnetic valve (9) and the control box (14) are connected via cables and signal lines, and the control box (14) and the remote controller (15) transmit signals wirelessly.

[0020] The integrated three-way pipe (11) is a steel pipe with an open front end and a closed rear end, and three tees are arranged in the middle, and another tee is arranged in the middle of the straight pipe of each tee.

[0021] The grouting pipe (5) is made of cement-based RPC material, is hollow in the middle, has a flat head at the lower end, and a cross-concave shape at the upper end.

[0022] The connecting hose (2), transparent steel wire hose (7), and slurry outlet pipe (10) are transparent plastic hoses, and an annular steel wire skeleton is arranged inside the plastic.

[0023] A diameter change is provided at the connection between the transparent steel wire tube (7) and the pressure-maintaining electromagnetic valve (6).

[0024] The working principle of the utility model is as follows: the bracket is bolted to the integrated three-way pipe and the control box; the vacuum machine pipeline is locked and connected to the integrated three-way pipe through a connecting hose, the vacuum electromagnetic valve and the slurry discharge electromagnetic valve are connected to the integrated three-way pipe, the slurry discharge electromagnetic valve is connected to the slurry discharge pipe, and the pipe mouth of the slurry discharge pipe extends into the slurry tank; the upper end of the integrated three-way pipe is connected to the transparent steel wire pipe, the upper end of the transparent steel wire pipe is connected to the pressure-maintaining electromagnetic valve, the pressure-maintaining electromagnetic valve is bolted to the connecting sleeve, the grouting positioning ring is bolted to the secondary lining trolley (16), and the grouting pipe passes through the grouting positioning ring and is vertically pressed on the waterproof board surface. Each electromagnetic valve is connected to the control box through a cable and a signal line, and the power supply is connected and the equipment is debugged. During construction, try to vacuum first, and seal the joints of the leaking parts with sealing tape. After all preparations are completed, close the grouting valve and slurry discharge electromagnetic valve on the grouting machine end; open the pressure-maintaining electromagnetic valve and vacuum electromagnetic valve, and turn on the vacuum machine to extract vacuum. When the stable pressure reaches the required vacuum degree, the grouting machine continues to vacuum while grouting. When you see slurry flowing out of the transparent steel wire tube under the grouting pipe, open the slurry discharge electromagnetic valve and close the vacuum electromagnetic valve. When thick slurry flows out of the slurry discharge pipe, close the pressure-maintaining electromagnetic valve. After thick slurry flows out of the other grouting pipe, close the pressure-maintaining electromagnetic valve. The grouting machine maintains constant pressure, open the pressure-maintaining electromagnetic valve one by one for 2 to 3 seconds to exhaust, continue to maintain pressure and then close the grouting valve. After the grouting cement is initially set, remove the pressure-maintaining electromagnetic valve and connecting sleeve, and remove the cleaning pipeline.

Claims

1. A vacuum extraction device for tunnel secondary lining concrete grouting, comprising a bracket (13), characterized in that: The bracket (13) is bolted to the integrated three-way pipe (11) and the control box (14); the vacuum machine (1) pipeline is locked and connected to the main pipe of the integrated three-way pipe (11) through the hose (2); a vacuum electromagnetic valve (9) is provided on the three branch pipes of the integrated three-way pipe (11), and the upper branch pipe of the vacuum electromagnetic valve (9) is connected to a slurry discharge electromagnetic valve (8); the other end of the slurry discharge electromagnetic valve (8) is connected to the slurry discharge pipe (10); the slurry discharge pipe (10) is connected to the slurry return tank (12); the upper end pipe openings of the three branch pipes of the integrated three-way pipe (11) are connected to the pressure-maintaining electromagnetic valve (6) bolted to the connecting sleeve (3) through the transparent steel wire tube (7); the grouting positioning ring (4) on the connecting sleeve (3) is bolted to the second lining trolley; the grouting pipe (5) passes through the grouting positioning ring (4) and the connecting sleeve (3) and is connected to the pressure-maintaining electromagnetic valve (6), and is vertically pressed against the waterproof board surface.

2. A vacuum extraction device for tunnel secondary lining concrete in-mold grouting according to claim 1, characterized in that: The pressure-maintaining electromagnetic valve (6), the slurry-discharging electromagnetic valve (8), the vacuum electromagnetic valve (9) and the control box (14) are connected via cables and signal lines, and the control box (14) and the remote controller (15) transmit signals wirelessly.

3. A vacuum extraction device for in-mold grouting of secondary lining concrete in tunnels according to claim 1, characterized in that: The integrated three-way pipe (11) is a steel pipe with an open front end and a closed rear end, and three tees are arranged in the middle, and another tee is arranged in the middle of the straight pipe of each tee.

4. A vacuum extraction device for in-mold grouting of secondary lining concrete in tunnels according to claim 1, characterized in that: The grouting pipe (5) is made of cement-based RPC material, is hollow in the middle, has a flat head at the lower end, and a cross-concave shape at the upper end.

5. The vacuum extraction device for in-mold grouting of secondary lining concrete in tunnels according to claim 1, characterized in that: The hose (2), transparent steel wire hose (7), and slurry outlet pipe (10) are transparent plastic hoses, and an annular steel wire skeleton is arranged inside the plastic.

6. A vacuum extraction device for in-mold grouting of secondary tunnel lining concrete according to claim 1, characterized in that: A diameter change is provided at the connection between the transparent steel wire tube (7) and the pressure-maintaining electromagnetic valve (6).

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