Small-diameter quick dewatering well structure and construction method

Abstract

This invention discloses a small-diameter rapid dewatering well structure and construction method. The structure includes: a well casing, the lower end of which penetrates the target aquifer, and the upper end of which is connected to a main water outlet pipe via an outlet pipe, the main water outlet pipe being connected to an extension pipe; an air intake unit, including an air intake pipe and a pneumatic source, one end of which is connected to the well casing, and the other end of which is connected to the pneumatic source; and a one-way valve assembly, including a first one-way valve and a second one-way valve, the first one-way valve being located between the air intake pipe and the well casing, and the second one-way valve being located between the air intake pipe and the outlet pipe; wherein, the pneumatic source generates gas to force water in the air intake pipe into the outlet pipe, and then discharges it from the outlet pipe and the main water outlet pipe. This invention utilizes a pneumatic source to provide power for pumping water from outside the well, making operation simpler and more convenient, reducing the use of steel pipes, and lowering engineering costs. It also facilitates ensuring the sealing of the dewatering well structure and improves construction efficiency.

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