Tunnel initial support device and construction method
A primary support and tunnel technology, applied in tunnels, tunnel linings, shaft equipment, etc., can solve problems affecting the health of operators, slow spraying speed, and affecting tunnel construction progress, etc., to avoid sprayed concrete operations and simple structure , The effect of shortening the construction time
Active Publication Date: 2018-08-10
CHONGQING TECH & BUSINESS INST +1
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Problems solved by technology
The construction method in the prior art usually uses a concrete jet pump to directly spray the ready-mixed spray material on the excavated rock surface. Since the general spraying operation needs to be completed many times, a large amount of dust is often generated during the spraying process. It affects the health of the workers, and the spraying speed is relatively slow, which affects the construction progress of the tunnel
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[0027] figure 1 It is a structural schematic diagram of the present invention, figure 2 It is a schematic structural diagram of the supporting trolley of the present invention, image 3 It is a structural schematic diagram of the arc-shaped plate section of the present invention, Figure 4 for image 3 A partial schematic diagram of A, Figure 5 It is a schematic diagram of the structure of the support block of the present invention, as shown in the figure: the initial tunnel support device of this embodiment includes a support trolley, a formwork and an airbag assembly, and the support trolley includes a vehicle frame and a walking track arranged at the bottom of the vehicle frame. The vehicle frame includes a plurality of door-shaped support brackets arranged side by side along the length direction of the vehicle frame and a connecting beam 1 for connecting the door-shaped support brackets. The door-shaped support brackets are connected by connecting beams 1, and the str...
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The invention discloses an initial supporting device of a tunnel and a construction method. The initial supporting device comprises a supporting trolley, a formwork and an air bag assembly. The supporting trolley comprises a trolley frame and traveling mechanisms arranged at the bottom of the trolley frame. The trolley frame comprises a plurality of door-shaped supporting racks arranged in the length direction of the trolley frame side by side, and connecting beams used for connecting the door-shaped supporting racks. The door-shaped supporting racks are connected through the connecting beams. The traveling mechanisms are arranged at the bottoms of the door-shaped supporting racks located at the two ends in the length direction of the trolley frame. The formwork is of an arch structure formed by connecting a plurality of arc-shaped plate sections in a hinged mode. A plurality of grouting holes are distributed in the arc-shaped plate sections. The formwork is arranged above the supporting trolley in a covering mode. Hydraulic telescopic rods are arranged between the formwork and the door-shaped supporting racks. The air bag assembly comprises air bags I arranged on the side faces of the arc-shaped plate sections, and air bags II arranged at the bottoms of the arc-shaped plate sections located on the lower portion of the formwork. By the adoption of the initial supporting device of the tunnel and the construction method, the concrete spraying operation of an initial support of the tunnel can be omitted, environment pollution is reduced, fast construction can be achieved, and the tunnel construction speed is increased.
Description
technical field [0001] The invention relates to the field of tunnel engineering devices, in particular to a tunnel primary support device and a construction method. Background technique [0002] At present, during the excavation of drill-and-blast tunnel engineering, after each cycle of excavation, it is necessary to perform initial support shotcrete on the excavation rock surface. The construction method in the prior art usually uses a concrete jet pump to directly spray the ready-mixed spray material on the excavated rock surface. Since the general spraying operation needs to be completed many times, a large amount of dust is often generated during the spraying process. It affects the health of the operators, and the spraying speed is relatively slow, which affects the construction progress of the tunnel. [0003] Therefore, there is an urgent need to develop a tunnel initial support device that can avoid the sprayed concrete operation of the initial support of the tunnel...
Claims
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IPC IPC(8): E21D11/10
CPCE21D11/102
Inventor 王悦王清江
Owner CHONGQING TECH & BUSINESS INST