The utility model discloses a water collecting well circulating water
dust fall device for
karst tunnel engineering, including water suction device, water collecting well and fixed together's mobile water tank and
sewage collection tank, and water suction device, water collecting well and mobile water tank are communicated in proper order through
water pipe, and water pump A is installed to the water inlet of
water pipe, and the below and the top of water suction device are all installed with
propeller A and
drive motor, and the vertically installed telescopic stainless steel
bellows of mobile water tank, one end of telescopic stainless steel
bellows is located inside mobile water tank, and water pump B is installed to the port, and the other end is located outside mobile water tank, and the port is installed with the
shower nozzle, and the periphery of
shower nozzle is installed with the
fender, and the adjacent
fender side fixed connection, and the water inlet of
sewage collection tank is located inside
fender, and the water outlet of
sewage collection tank and water collecting well water inlet are communicated through the backwater
pipe. The utility model is used in
karst tunnel engineering, not only solves the problem of water accumulation in the
cave, but also improves the
dust fall efficiency and improves the construction environment.