Double-sleeve artesian deep well dewatering construction method and structure for muddy silty clay silty soil

Abstract

The invention belongs to the technical field of building construction, and particularly relates to a double-sleeve artesian deep well dewatering construction method for muddy silty clay silty soil. The double-sleeve artesian deep well dewatering construction method comprises the following steps of (1) measuring and positioning a deep well, digging a pit and detecting an obstacle; (2) deep well hole forming; (3) lowering a coarse filter pipe and filling the coarse filter pipe with a coarse filter material; (4) well washing; (5) lowering a fine filter pipe and filling the fine filter pipe with afine filter material; (6) trial precipitation; (7) implementing precipitation; and (8) plugging a tube well. The method has the beneficial effects that firstly, soil property parameter characteristics are defined through geological exploration, and it can be ensured that underground water can well permeate into the deep well and clean water basically flows into the well by adopting a double-filtering measure of combining the coarse filter pipe and the fine filter pipe; the precipitation effect is effectively guaranteed, and the good precipitation effect is shown in the two aspects of large water yield and clear water discharge; and the defects of small water yield, turbid effluent and the like in the prior art are overcome, and it can be ensured that deep well precipitation meets the design and construction requirements.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a construction method and structure of a double-casing artesian deep well dewatering construction with muddy silty clay sandwiched with silty soil. Background technique [0002] Artesian deep well is widely adopted as a kind of simple, economical and practical dewatering method of deep foundation pit dewatering, for example: the public number is CN103790167A disclosed foundation pit inside and outside adopts artesian deep well dewatering. However, in areas with complex geology of muddy silty clay mixed with silt soil, due to the poor water permeability, high water content and poor bleeding of the soil, the use of conventional artesian deep well construction methods often results in low drainage and muddy water, which greatly reduces the foundation pit. The effect of precipitation is not good for controlling the stability of water and soil inside and outs...

AI Technical Summary

Problems solved by technology

Due to the complex and variable soil quality in the complex geology of muddy silty clay mixed with silt, relying on the fluidity of water to penetrate the filter material and then penetrate into the pipe, the water often carries the soil and is easy to deposit in the pipe, resulting in less and less water output in the well , and it is easy to pump out turbid water; especially for muddy water from wells outside the pit, it is difficult to guarantee the stability of the entire foundation pit grading

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