Deep thick muddy soft soil layer vacuum pipe well precipitation construction structure and construction method thereof

Abstract

The invention discloses a deep thick muddy soft soil layer vacuum pipe well precipitation construction structure in the field of engineering construction and a construction method thereof. The structure comprises a precipitation well, the upper end of the inner side of the precipitation well is sleeved with a solid steel pipe, the outer side of the solid steel pipe is filled with cohesive soil, the lower end of the precipitation well is sleeved with a steel pipe filter pipe, the outer side of the steel pipe filter pipe is filled with a medium-coarse sand filter material, the top end of the precipitation well is sealed, the bottom end of the precipitation well is filled with aggregate to form a filter layer, a sinking pump is arranged in the precipitation well and is connected with a vacuum pump, and a draining pipe is arranged at the tail end of the vacuum pump. The method comprises the steps of lofting before construction, drilling construction, well pipe machining and putting, precipitation construction, precipitation pipe well closing and the like. The muddy layer water containing rate is effectively reduced, through vacuum precipitation, the muddy water containing rate is reduced to about 20%.

Description

technical field [0001] The invention relates to the field of engineering construction, in particular to a vacuum tube well dewatering construction structure and construction method of a deep and thick muddy soft soil layer open-cut foundation pit vacuum tube well. Background technique [0002] In many coastal or inland cities where subways are built, there are extensive land-sea interactive sedimentary strata, which are specifically manifested in the widespread existence of silty soft soil layers. The silty soil layers have high water content, thixotropy, rheology, high compressibility, Due to the characteristics of low strength, low water permeability and unevenness, the excavation of deep foundation pits in this type of soil layer is often affected by various adverse characteristics of silty soft soil, it is difficult to invest large-scale equipment, and it is difficult to adopt direct excavation. Excavation by means of installation and other methods, the construction effi...

AI Technical Summary

Problems solved by technology

[0002] In many coastal or inland cities where subways are built, there are extensive land-sea interactive sedimentary strata, which are specifically manifested in the widespread existence of silty soft soil layers. The silty soil layers have high water content, thixotropy, rheology, high compressibility, Due to the characteristics of low strength, low water permeability and unevenness, the excavation of deep foundation pits in this type of soil layer is often affected by various adverse characteristics of silty soft soil, and it is difficult to invest in large-scale equipment, and it is difficult to adopt direct excavation. Excavation by installation and other methods, the construction efficiency is low, and the construction risk is high

Images