嵌岩桩嵌岩段侧摩阻力浅析

Study on Lateral Resistance of Rock Inserted Piles

摘要:

为求出嵌岩桩嵌岩段侧摩阻力的表达式，假定嵌岩桩桩侧破坏由桩岩接触面上的滑动引起，桩岩接触面的压力由加载前岩土层自重产生的侧压力和由剪切膨胀产生的应力增量组成。用弹性力学的方法求解出桩侧正应力，引入了岩石破坏的Hoek-Brown强度准则，由此求出了嵌岩段桩侧阻力的表达式，并指出了此公式的适用范围。最后结合工程实际进行了对比分析，表明本文方法具有一定的实用性。

Abstract:

In order to attain the expression of the lateral resistance of rock inserted piles, the breakage is produced by the slippage between the pile and rock assumed by this paper. The pressure between the pile and rock is composed of the pressure generated by deadweight and the one generated by expansion. Then the total normal pressure between the pile and rock is attained by the elastic method. At the basis of Hoek-Brown criteria, the final expression of the lateral resistance of the rock inserted pile is formed. Finally the comparison between this method and data from the fact of the practical project shows good agreement in some degree.