悬臂排桩支护结构桩顶最大水平位移计算分析

文章以矩形基坑悬臂式支护结构为研究对象,建立了整个支护系统的能量表达式,推导了基坑中部桩顶最大水平位移的解析解,在此基础上对各主要支护参数进行了正交试验设计研究,得出了开挖中各个参数对桩顶最大水平位移的影响程度和各个参数的灵敏度。分析结果表明,坡顶超载和比例系数“m”是控制桩顶最大水平位移的主要参数,与实测结果进行对比,表明该方法是可行的。

Calculation and analysis of the maximum horizontal displacement of the pile head in the cantilever soldier pile retaining structure

The expression of the potential energy of the total cantilever soldier pile retaining system in rectangular excavation is established.Based on the principle of minimum potential energy,a new analytic solution to the maximum displacement of the pile head is derived.An orthogonal design test is carried out to study the main parameters of the retaining structure,and the influences of these parameters on the maximum horizontal displacement are obtained.It is concluded that the surcharge and"m"are the primary parameters which control the maximum horizontal displacement of the pile head.Other parameters,such as excavation length,have little influence on the maximum horizontal displacement of the pile head.A practical example is presented,and the calculated result is compared with the measured result and proved to be feasible.