Based on the assumed vertical displacement of the unit cell and the assumed distribution on the pile - soil interface of the pure friction pile , and using the boundary conditions that there was no relative slipping between pile and soil , the pile decrement was equal to that of soil on the pile - soil interface and that the vertical sheer stress of the unit cell ' s outer edge was equal to zero , the formula for the frictional distribution of the pure friction pile and the formulas for the displacement of pile and soil in the treated area were deduced 通过假定的单元体竖向位移模式和纯摩擦桩桩侧摩阻力分布模式,利用桩土间无相对滑移、桩土界面处桩土压缩量相等和单元体边界处竖向切应力为零等边界条件,推导出复合地基纯摩擦桩桩侧摩阻力分布的具体表达式,以及加固区桩土压缩量的计算公式。
With a suggested displacement model , this dissertation takes the interaction of soil and piles into consideration and derives an analytical - function of compressive deformation of stabilized layer of composite foundation under embankment . analytical - functions are also derived of frictional resistance between pile and soil and of the pile - soil stress ratio 本文在假设的位移模式下,考虑桩土相互作用,通过力学推导,得到了路堤荷载下复合地基桩侧摩阻力、加固区桩间土压缩量和桩土应力比的解析表达式。
3 . this composition foundation produces a reinforce - body collectively functioned by both the piles and the earth , which greatly diminishes its compression deformation . the produced composition serves as a connecting link to decrease the settlement of substratum because of its " whole " effect 3深层搅拌桩复合地基不仅使形成的加固区由于桩土的共同作用,构成一个增强体,大大减小了加固区的压缩量,而且形成的复合体由于其整体效应,起到承上启下扩散的作用,减小了下卧层的沉降量。