The invention relates to a cast-in-situ bored
pile constructing method for cleaning
sediment by a
gas lift reverse circulation method. The cast-in-situ bored
pile constructing method comprises the following steps: measuring and arranging a
pile position, arranging a steel casing at an upper opening of a pile hole, and placing a drilling
machine; drilling the pile hole by using the drilling
machine, cleaning the pile hole, and installing a reinforcing cage; installing a concrete
pipe at the inner lower part of the reinforcing cage; installing a
sediment discharging
pipe at the top end of the concrete
pipe, installing a rubber pipe at a preserved port in the
sediment discharging pipe, and enabling the rubber pipe to stretch into the pile hole from the interior of the sediment discharging pipe; connecting the other end of the rubber pipe to an
air compressor; connecting the sediment discharging pipe to a
slurry purifying device by using a soft pipe; starting up the
air compressor, and starting to clean the hole through
gas lift reverse circulation; after hole cleaning, pulling the rubber pipe out of the sediment discharging pipe, detaching the sediment discharging pipe, and
casting concrete into the pile hole. Before sediment cleaning, construction can be performed only by installing the sediment discharging pipe at the top end and putting down the rubber pipe and by taking out the sediment discharging pipe and the rubber pipe before concrete
casting, so that the sediment
treatment time is reduced and the sediment
treatment effect is very good.