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The structure and construction of the foundation pit support shotcrete machine.

Release time:

2021-10-24 19:54

Source:

Saner Heavy Industry

The foundation pit support shotcrete machine is suitable for underground engineering and shotcrete construction in engineering construction, mines, tunnels, culverts, subways, hydropower, underground engineering, coal high marsh mine roadways. It is also suitable for all kinds of industrial kilns and furnace lining refractory spraying molding or repair: transportation and soil spraying in various slope protection and greening construction.

This equipment is a tidal spray equipment suitable for iron (public) road tunnels, high-rise buildings and water culverts. Simple mechanical structure, convenient operation and maintenance. Special presser. The foundation pit support shotcrete machine has reasonable structure, humanized design, reliable performance, convenient operation and maintenance, and long service life.

The main structure of the foundation pit support shotcrete machine.

The anchor points of the supporting shotcrete machine mainly include rotor concrete shotcrete machine, cement slurry mixer, squeezing pump, electric control box, discharge elbow, air path system, mixing device, spray gun, frame, etc.

Mine support shotcrete machine: mainly composed of hopper, mixing device, discharge bend, air path system, rotor, reducer and other parts. The motor rotates the rotor driven by the reducer. The bottom pit support type shotcrete machine loads the stirred materials into the rotor, conveys them to the discharge bend through the gas pipeline in the gas pipeline system, and then mixes them through the conveying pipe, nozzle and spray to the sprayed surface by the assistant of the auxiliary air inlet pipe of the air pipeline system.

The main points of the concrete foundation pit work of the spraying machine:

a. Before spraying, clean the rock surface with high-pressure air or high-pressure water to clean the dust and concrete chips attached to the rock surface to ensure that the concrete and the rock surface are firmly bonded 1. If washing the rock surface with high-pressure water will cause softening, only high-pressure wind can be used to clean the debris on the rock surface (depending on geological conditions).

B, strict grasp of the rules under the fast coagulant doping, and increase uniform;

The pressure of the eruption machine is usually controlled at 0.2~0.4 MPa;

Strictly control the water-cement ratio of the spray nozzle to make the surface of the spray layer smooth and lubricate without dry spots or slippage;

The direction of the nozzle shall be vertical to the rock-sprayed surface, and the interval between the nozzle and the rock-sprayed surface shall be 0.6~1.0 m;

Construction Technology of Foundation Pit Support Shotcrete Machine

Construction technology: Slope trimming after slope excavation-installation of dowels and reinforcement frames-hanging steel mesh-shotcrete.

Use 14 mm diameter steel bars with a length of 1500mm @ 1500d1500mm, 1400 mm inserted in soil and 100 mm exposed. 6 @ 1500mm-1500mm diameter keel bars. Galvanized steel wire mesh (mesh 20*20mm) with 8# wire diameter of 2 mm is hung on the surface and shotcrete is adopted. The shotcrete adopts wet process, the coarse aggregate particle size is 5-10mm, and the surface layer adopts two-layer spraying to ensure slope safety. Full.

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