黏性土抗滑桩桩间土拱分析及合理桩间距研究

针对桩间土拱效应,对黏性土抗滑桩合理桩间距的确定进行分析。以拱脚最不利位置土体莫尔库伦强度条件及桩土接触面任一点土体剪应力不大于桩体提供的最大抗滑力为控制条件,并以作用于桩体及桩间土体的滑坡推力不大于抗滑桩承担的绕流阻力为第三个控制条件推导出抗滑桩最大桩间距的计算公式。该公式具有力学性质明确,计算简便,并对一工程实例进行计算,该公式计算结果较为合理,具有工程参考价值。

The research on the soil arch character and suitable spacebetween anti-slide piles among sticky soil

Aim at the soil arch effect between piles,analyze the suitable space between the anti-slide piles. The paper deduce the formula for calculating the largest space of anti-slide pile. The control conditions is that the Mohr coulomb strength condition of soil at the most disadvantageous position at the soil arch springing and the shear stress is small then the maximum sliding resistance at each point on the pile-soil contact surface. Another control condition is that the landslide thrust act on the pile and the soil between piles is small then the flow resistance undertake by pile. The formula is clear and simple .The is formula is reasonable then calculation an engineering example, it has the value of project reference.