文档介绍：第 28卷第 10 期 岩 土 力 学
2007 年 10 月 method that the pressure is confirmed with back analysis
according to displacement is given. And it is pointed out that the two ways are identical that the press and distortion are set on the
slope soils by formula deduction. The analysis of rainfall is taken into account; and the finite element program is given based on the
Drucker-Prager model. The back analysis is set up with 2-norm. The expansive parameter is calculated by the Newton’s iteration. The
connection between the 2-norm and the expansive parameter is a curve that is single-valued continuous with a single concave point.
At last, the expansive parameter and the expansive press formula of the expansive soil slope are given.
Key words: expansive model; expansive pressure; back analysis; slope; rainfall
膨胀力显然不同于室内膨胀力试验所得结果，但是
1 引 言
最终也没有从理论上给出比较合理的膨胀力；目前，
膨胀土的膨胀问题一直是困扰工程界的难题，我 岩体的物理力学参数主要是通过现场和室内实验获
国是膨胀土分布最广泛的国家之一，这一问题解决不 得，其结果与客观值有一定的偏差；此外，在深部
好，必然会影响我国所开展的大规模公路工程和铁路 硬岩开采过程中，工程岩体的物理力学性质随着地
－
工程的发展。科研工作者都做了很多的工作[1 3