基于“重力压密法”下的滑带土强度参数取值分析

以往的滑带土强度参数通常是在现场所取得的滑带土带回室内进行剪切试验得到。这样存在很大的局限性。因为滑带土在运移过程中存在扰动。本文推荐一种实用的好方法—“重力压密法”。其优点在于巧妙利用土体的含水量、干密度和强度参数指标之间存在的普遍联系：即对于同一个土体,含水量越高,干密度就越低,相应的其抗剪强度指标也就越低。这样得出的强度参数就弥补了滑带土从野外钻孔或平硐到实验室所脱离的天然赋存环境。增加滑带土室内试验的真实性,使滑带土强度参数真实、可用。

Analysis of choosing strength parameter of in soil slip surface based on "Gravity Compression Method"

The strength parameter of slip soil usually comes from shearing experiments that slip soil taken in the open makes in the lab, this method has great limiations, because slip soil will be disturbed in the transportation. This text recommends the ＂Gravity Compression Method＂ that it is a good and useful method. The method has advantage of grasping ingeniously between water content and dry density and strength parameter univesal relation. That is, for the same slip soil, the high water content, the high dry density, the strength parameter becomes low correspondingly. The strength parameter that uses above method compensates for slip soil natural environment that escapes from hole or lanes in finding slip soil to laboratory, that increases slop soil reliability of indoor experiment and makes strength parameter of slip practical and useful.