The invention discloses a
dewatering construction method for a near-lake superfine sand soil foundation pit, and belongs to the field of foundation pit
dewatering. The
dewatering construction method comprises the following steps that: step 1, through calculation, a hole is drilled outside a
basement foundation pit superfine sand soil foundation pit slope, the
diameter is equal to the
diameter of a non-fine concrete pervious
pipe plus 600 mm, and the depth determined through calculation must be reached; step 2, non-fine concrete pervious pipes are wrapped with single layer of
corrosion-resistant dense-mesh filter cloth; step 3, the non-fine concrete pervious pipes wrapped with the single-layer
corrosion-resistant dense-mesh filter cloth are sequentially installed, and the part between every two sections of non-fine concrete pervious pipes is wrapped with double-layer
corrosion-resistant dense-mesh filter cloth; step 4, after installation is completed, the periphery of the non-fine concrete pervious pipes wrapped with the single-layer corrosion-resistant dense-mesh filter cloth are filled with a
filter material; and step 5, a water pump is installed in each non-fine concrete pervious
pipe, and the non-fine concrete pervious pipes are each connected with a drainage
pipe. Loss of superfine sand soil in a dewatering process can be eliminated at a time, the dewatering effect is guaranteed, the superfine sand soil at the foundation pit slope can be dried for a long time, and then the stability of the foundation pit slope is guaranteed.