岩土力学2011，Vol.32Issue(1)：193-198,6.
冻融作用下水泥及石灰改良土静力特性研究
Static properties of cement- and lime-modified soil subjected to freeze-thaw cycles
摘要
Abstract
In order to enlarge the usage extent of roadbed fillings of high-speed railway, the stress-strain relationship and failure shapes were studied on the cement- and lime-modified soil under different freeze-thaw cycles, cooling temperature and confining pressure.The results showed that stress-strain relationship of cement soil was work-softening.The stress-strain relationship of lime soil turned into work-hardening subjected to freeze-thaw cycles.Cement soil was mainly in a brittle failure state, and lime soil was in a ductile failure state.The effects of confining pressure on stress-strain curves of modified soils were not distinct, and the peak strength of modified soils increased with the confining pressure increasing.The cohesion decreased with increasing of the number of freeze-thaw cycles, but there was no changing law for the internal friction angle.The effect of cooling temperature on the cohesion was not obvious.The improvement effect of cement was superior to lime under repeated freezing and thawing.关键词
水泥土/石灰土/静力特性/冻融循环分类
建筑与水利引用本文复制引用
王天亮,刘建坤,田亚护..冻融作用下水泥及石灰改良土静力特性研究[J].岩土力学,2011,32(1):193-198,6.基金项目
国家自然科学基金(No.50678020) （No.50678020）
铁道部科技研究开发计划(No.2006C011-B-2) （No.2006C011-B-2）
北京交通大学校科技基金(No.2008RC041). （No.2008RC041）
