Double-row sheet pile decompression self-unloading method and double-row pile structure thereof

Abstract

The decompression self-unloading method comprises the design and installation process of self-unloading double-row sheet piles and the mechanical calculation optimal process of the self-unloading double-row sheet piles, a double-row sheet pile structure can be obtained through design of the method, the double-row sheet piles comprise the double-row sheet piles, unloading geotechnical cloth, filling soil, anchoring rings and top supports, the double-row sheet piles are vertically inserted into a soft soil foundation of a to-be-constructed area; the top supporting cross bars are arranged at the top positions of the double-row sheet piles; a plurality of anchoring rings are arranged on the inner sides of the double-row sheet piles, unloading soil cloth is hung on the anchoring rings, and the space defined by the double-row sheet piles is divided into a plurality of layers. And the filling soil is filled on the unloading geotechnical cloth until the enclosed space is full. The self weight of the filling soil on the unloading geotechnical cloth is shared through the unloading geotechnical cloth, so that the soil stress in the filling soil is greatly reduced, and the soil pressure load of the filling soil on the double-row sheet piles is also greatly reduced.

Description

technical field [0001] The invention relates to a decompression self-unloading method, in particular to a double-row sheet pile decompression self-unloading method and a double-row sheet pile structure. Background technique [0002] my country's large-scale docks, ship locks, sluices, bridge piers, artificial islands and other projects are increasing day by day, and it is necessary to deal with the technical challenges of engineering construction brought about by greater water depths, and the technical requirements for cofferdams and foundation pit enclosure structures are getting higher and higher. In this case, single-row steel sheet piles often fail to achieve the expected effect of support, and there are problems such as large horizontal displacement of the weir crest and insufficient structural rigidity. It is necessary to increase the support stiffness of the cofferdam to restrict the displacement of the pile body. Cofferdam is an effective measure to strengthen the ri...

AI Technical Summary

Problems solved by technology

However, the filling soil in the double-row steel sheet piles often produces a large earth pressure, which causes the steel sheet piles to protrude outward. The greater the deformation of the sheet pile structure, if its own stiffness is insufficient, it will seriously affect the integrity and service performance of the double-row steel sheet pile structure

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