嵌岩桩轴向荷载传递的Goodman理论及其分析

ANALYSIS OF GOODMAN'S THEORY ABOUT AXIAL STRESS ON ROCK-SOCKED PILE

介绍了嵌岩桩轴向应力传递的Goodman计算理论 ,并进行了公式推导。该公式将嵌岩桩在轴向应力作用下桩体压缩产生的侧向变形看做为有压洞室在周边上产生的径向位移 ,然后应用平衡、物理和几何方程求解得到。公式从理论上验证了国内外大量嵌岩桩的荷载轴向传递规律 ,同时指出了公式存在的缺陷 ,在解决了缺陷后 ,可利用该公式对嵌岩桩进行优化设计。

Goodman's Formula and derivation about axial stress on rock-socked pile is discussed. The formula regards radio displacement caused by axial stress in pile as that in boundary of pressured round hole, and its derivation is made through equations of equilibrium and compatibility. It proves the regulation of axial stress passing through pile and points out its defaults. After the solution to defaults, it can be used to design for high quality for rock-socked piles.