- 责任者：Zhou Bo (School of Civil Engineering and Mechanics ; Huazhong University of Science and Technology ; Wuhan 430074 ; China) ; Lu Zili
- 刊名：Geological Bulletin of China
- 出版年：2013
- 卷期：32(12)
- 关键词：土力学 ; soil mechanics ; 岩体力学 ; rock mechanics
- 页码：p.2001-2007
- 图表：9 illus., 1 table, 17 refs.
- 分类号：1702
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
Soil-Rock Mixture （SRM） is a kind of discontinuous and heterogeneous geotechnical material, and its mechanical property has become a subject of debate in geotechnical engineering. In the present study, SRM was assumed to be an ideal binary medium material, in which the rock and soil were assumed to be brittle-elastic and elastic-plastic media respectively. Duncan-Chang model was employed to define the constitutive relationship of soils. A new parameter named local strain coefficient of rock was adopted to relate the microscopic strain of the media and the volume average strain of StkM. The stress-strain relationship of SRM was then obtained by the simple homogenization theory. A series of tri-axial tests were conducted for the residual soil from Guangdong Province to obtain the coefficients in stress-strain function. The final relation curve could reflect the stress-strain relationship of SRM preferably under different conditions. The results show that the shear strength of SR_M increases relatively with the increasing of confining pressure and volume rock rate of SRM. However, the strengthening effect by rock is not obvious when the volume rock rate is less than 0.3.