软土中静压桩施工对紧邻地下连续墙围护结构的影响

基于3×3群桩,采用模型试验模拟静压桩施工,用有机玻璃棒和铝板模拟静压桩和地下连续墙围护结构,研究了软土中静压桩施工对紧邻地下连续墙围护结构的影响。结果表明,静压桩施工过程中,围护结构受静压桩挤土效应的影响逐渐增大。其中,随着围护结构平面尺寸的增大,其水平位移和坑底隆起变形也逐渐增大,而主动区土压力则逐渐减小;围护结构-桩区间距离越小,其水平位移、坑底隆起变形和土压力越大。研究结果对软土地区静压桩施工具有一定的指导意义和实用价值。

The Effect on Adjacent Diaphragm Wall Retaining Structure by Static Pressure Pile Construction

Based on the 3?3 group piles, the static pressure pile construction is simulated in the model experiment, using plexiglass rods and sheet aluminous to simulate static pressure pile and diaphragm wall retaining structure, studying the static pressure pile construction effect on adjacent diaphragm wall retaining structure in soft soil. The results show that the static pressure pile soil compaction effect on exterior-protected construction is gradually increasing in the process of static pressure pile construction. And with the increasing of retaining structure plane size, its horizontal displacement and bottom heave deformation is gradually increasing, and active region earth pressure is gradually decreasing; the smaller the distance between the retaining structure and pile area, the bigger the horizontal displacement, bottom heave deformation and the earth pressure. The study results have some guiding significance and practical value on static pressure pile construction in soft soil area.