双排桩计算方法探讨

双排桩围护结构是一种新型的围护结构，这种结构具有较大的侧向刚度，可以有效地限制围护结构的变形，不必设置支撑，是深基坑支护结构的优选方案之一。但其实际受力机理比较复杂，前后排桩之间的土对结构的作用较难确定，针对这一问题，本文提出了一个新的计算模型，即将前、后排桩及桩间土视为一个整体；前排桩爱驻动土压力，基坑深度以下的后排桩受被动土压力，并进行了桩-接触面-土的非线性分析，提出了一些具有参考价值的结论。

RESEARCH ON CALCULATION METHOD FOR DOUBLE-PILES

As a new enclosure structure,the double pile has a great lateral rigidity,which leads to the restriction of piles deformation and can hold on without braces It is one of the optimum design of enclosure structures for deep excavation But more studies should be done on how it works practically It is very difficult to determine the action of the soil between the double piles A new model for calculation is proposed to this question,in which the front and back piles as well as soil between them are assumed to be a whole structure,the front pile sustains the active soil pressure,and the back pile below the bottom of deep excavation is subjected to passive soil pressure The nonlinear analysis of the pile interface soil system is analyzed,some valuable conclusions are drawn as references