挤土桩水平向挤土位移分析

Horizontal soil compaction displacement of driven compaction pile

为了分析挤土桩施工对相邻建筑设施的影响 ,在试验研究的基础上 ,采用Vesic圆孔扩张理论和Duncan -Chang模型模拟土的力学性能 ,按挤土应力及土的压缩曲线拟合函数确定土的体积应变 ,建立的一种新的能考虑土体非线性本构关系的挤土位移分析方法 ,能较好地反映挤土位移的机制 ,比Vesic圆孔扩张理论方法在计算精度上有很大改进 ,在实际应用中可行 .

The Vesic hole expansion theory and Duncan-Chang model were applied, and volumetric strain caused by the compaction stress was determined by the regression curve of void ratio and compaction stress to study the effect on near buildings and installations caused by driven pile and the change of soil compaction displacement. The comparison of paper method with Vesic method through tests makes the principle of soil compaction displacement more clear and paper's analysis results more accurate than the Vesic method, and proves that this method is reasonable in theory and feasible in practice.