摘要
通常情况下 ,在非饱和土加载过程中 ,均把基质吸力 (ua-uw)作为常量来看待。事实上 ,不排水的条件下 ,随轴向力的作用 ,土体被压缩 ,饱和度增加而基质吸力是减少的 ,有些情况下会对土的抗剪强度产生很大影响。即使在排水条件下 ,瞬时吸力减少也会对土的抗剪强度产生影响。寻求轴向应力增量与基质吸力增量之间关系 ,得出改进了的非饱和土的抗剪强度理论。
Matrix suction is commonlyregarded as a constant in the process of loading. In fact ,matrix suctionwill be reduced with vertical loading. With soil being compacted and saturation degree decreasing, shearing strength of soil will be lower than that usually considered. In thepaper, based on the revealed relation of vertical stress and matrix suction, a more proper shear strength theory of unsaturated soil will be achieved.
出处
《西部探矿工程》
CAS
2004年第5期11-12,14,共3页
West-China Exploration Engineering
基金
国家自然科学基金 (No.50 2 790 36)资助项目成果
关键词
非饱和土
抗剪强度
基质吸力
unsaturated soil
shear strength
matrix suction
