水文地质工程地质2016，Vol.43Issue(3)：148-152,5.DOI:10.16030/j.cnki.issn.1000-3665.2016.03.23
原状黄土遇水及饱和后软化特征研究
A study of soften characteristics of wet and saturated loess
摘要
Abstract
Structural loess is water sensitivity,and previous studies are almost made by laboratory tests.Using cyclic triaxial apparatus along with the bender element system,shear-wave velocity and axial deformation of undisturbed loess and saturated loess were tested under different confining pressures.Furthermore,a borehole and in-situ tests were carried out at a saturated loess site in the Xigu district near Lanzhou.The laboratory and in-situ test results show that loess will soften during wetting,and saturated loess presents thixotropy.By comparing the statistical relationship between the shear-wave velocity and SPT blow count of saturated silts with that of sands,it is found that SPT blow count for saturated silts are small due to thixotropy,and the shear-wave velocity is a small strain and non-destructive test.For the saturated silt and sand with an identical shear-wave velocity,the SPT blow count of the saturated silt is significantly less than that of sand.关键词
黄土/水敏性/触变性/剪切波速/标贯击数Key words
loess/water sensitivity/thixotropy/shear-wave velocity/blow count of SPT分类
地质学引用本文复制引用
董林,王兰民,夏坤,王峻..原状黄土遇水及饱和后软化特征研究[J].水文地质工程地质,2016,43(3):148-152,5.基金项目
中国地震局地震预测研究所基本科研业务专项(2013IESLZ03) （2013IESLZ03）
国家科技部地震行业专项(201308015) （201308015）
