岩土工程学报2012，Vol.34Issue(2)：363-368,6.
高应力水平下深部黏土力学特性微观分析
Micro analysis of mechanical characteristics of deep clay under high stress level
摘要
Abstract
The deep clay exhibits different mechanical properties under different stress levels. The available test results show that the compression index and internal friction angle of normally consolidated saturated deep clay at high pressure are lower than those at medium and low pressures. In order to reveal the intrinsic mechanism of the clay for the above mechanical change, the e - p curve of the clay at high pressure is firstly compared with that calculated by the existing method which can predict the e -p relationship at large pressure by use of the parameters obtained from experimental e -p data at low pressure based on the diffuse double-layer theory. It is seen that the calculated results underestimates the compression of the deep clay at high pressure. Unreasonable hypothesis that there is a logarithm relationship between the dimensionless potential function at the midpoint of two clay platelets and dimensionless distance function is discovered. The improved hypothesis and the relevant procedure are proposed. There is quite good agreement between the calculated and experimental e-p relationships at large pressure. And then, based on the elastic adhesive friction theory, the calculated results show that the friction coefficient of the clay at 0.2 MPa is 2 times the one at 1.6 MPa, which is almost consistent to the measured one.关键词
深部黏土/高应力水平/力学特性/微观分析Key words
deep clay/high stress level/mechanical property/micro analysis分类
建筑与水利引用本文复制引用
商翔宇,余海岁,周国庆,王飞,陆勇..高应力水平下深部黏土力学特性微观分析[J].岩土工程学报,2012,34(2):363-368,6.基金项目
国家自然科学基金项目(51009136) （51009136）
中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金项目(SKLGDUE08006X):江苏自然科学基金项目(BK2011212) （SKLGDUE08006X）
