岩土力学2013，Vol.34Issue(1)：109-114,122,7.
重塑硅藻土抗剪强度的环剪试验研究
Research on shear strength of remolding diatomite by ring shear tests
摘要
Abstract
The diatomite is a kind of strong structural soil, which has small density, large porosity, and high water absorption rates of dry rock. The shear strength of natural diatomite is large, but the structural strength lost occurs when the diatomite is disturbed by the external disturbance or weathering; so the diatomite slope is easily destroyed in the performance of landslide; thus to study the mechanical properties under large deformation is necessary. Using the characteristics of ring shear apparatus can study soil shear strength variation in a larger shear displacement conditions, this paper makes ring shear strength test study of the remolding diatomite, to obtain the stress displacement curves under different vertical pressures, which indicate that the remolding diatomite is of typical strain softening. According to the ring shear test results the remolding diatomite's, shear strength and residual strength are obtained, and the soil mechanical properties are analyzed from the material composition and microstructure characteristics of the remolding diatomite, so as to provide reasonable parameters for diatomite landslide analysis and disaster prevention and control.关键词
重塑硅藻土/环剪试验/抗剪强度/滑坡/残余强度Key words
remolding diatomite/ ring shear test/ shear strength/ landslide/ residual strength分类
建筑与水利引用本文复制引用
郭长宝,张永双,孟庆伟,郑光,李海华..重塑硅藻土抗剪强度的环剪试验研究[J].岩土力学,2013,34(1):109-114,122,7.基金项目
地质力学研究所基本科研业务费项目(No.DZLXJK201206) （No.DZLXJK201206）
地质灾害防治与地质环境保护国家重点实验室开放基金项目(No.SKLGP2010K015) （No.SKLGP2010K015）
国家自然科学基金项目(No.41072269) （No.41072269）
国家科技支撑计划课题(No.2011BAK12B09). （No.2011BAK12B09）
