不同固结度对软土强度及变形的影响  

Impact of Different Consolidation Degrees on Strength and Deformation of Soft Soil

作　　者：李佐良[1] 杨爱武[1] 许再良[2] 张兴增[2] 

机构地区：[1]天津城市建设学院土木工程系天津市软土工程特性与工程环境重点实验室,天津300384 [2]铁道第三勘察设计院集团有限公司,天津300142

出　　处：《中国港湾建设》2012年第2期47-50,共4页China Harbour Engineering

基　　金：国家自然科学基金项目(40972170);天津市科技发展计划项目(06YFSZSF04000;11JCZDJC23900)

摘　　要：土的固结度对土的工程力学性质影响较大。对重塑软土进行了不同固结度的三轴试验。试验结果表明:重塑软土的抗剪强度随着固结度的增加而增加;其抗剪强度指标c变化很小,基本为定值;准随着固结度增加并非单调增加。对试验数据用邓肯-张模型进行拟合分析,拟合效果随着围压和固结度的增大而变差。Soil consolidation has great influence on engineering mechanic properties of soil.Triaxial tests are performed on remolded soil of different consolidation degrees.The results show that the shear strength grows with the increase of consolidation degrees in remodeled soft soil.The internal cohesion of the shear strength parameters is nearly a constant value;the angle of internal friction increases with the consolidation degrees but it is not a simple linear increase.Duncan Chang model is used to analyze the experimental date,and the fitting effect becomes worse with the increase of confining pressure and consolidation degree.

关 键 词：重塑软土 固结度 抗剪强度 变形 邓肯-张模型 

分 类 号：TU411.7[建筑科学—岩土工程] TU411.93[建筑科学—土工工程]