高含水量对曼谷软土水泥土不排水剪切强度特性的影响  

Influence of High Water Content on Undrained Shear Strength Characteristics of Soft Cement-soil in Bangkok

作　　者：张高宁 

机构地区：[1]中铁上海设计院集团有限公司,上海200070

出　　处：《路基工程》2012年第3期93-96,共4页Subgrade Engineering

摘　　要：通过开展固结不排水三轴剪切试验,研究了曼谷软土水泥土在高含水量下的固结不排水剪切特性。结果发现:当水泥含量<10%时,水泥土处于轻微的超固结或正常固结应力状态,但当水泥含量≥10%时,则呈现出典型的超固结应力状态;当水泥含量≥10%时,侧向应力对水泥土的强度影响不大,水泥土的强度受含水量的影响较大;而当水泥含量<10%时,水泥土的强度与水泥含量、侧压力均成正比。同时预测了高含水量下养护28天水泥土的三轴固结不排水剪切峰值强度与含水量与水泥含量的比值的经验函数关系。With consolidated undrained triaxial shear test, the consolidated undrained shear characteristics of soft cement-soil in Bangkok under high water content is studied. As a result, it is found that when the cement ~ontent is less than 10 %, the cement-soil is in the state of slight over-consolidation or normal consolidation stress; when the cement content is equal to or larger than 10 %, this soil assumes the state of typical over- consolidation stress, and in this case, the lateral pressure has little influence on the strength of the cement-soil which is affected by the water content to a larger extent; however, in case of the cement content less than 10 %, the strength of the cement-soil is directly proportional to the cement content and lateral pressure. At the same time, the empirical function relation between triaxial consolidated undrained peak shear strength of the 28-days-curing cement-soil under high water content and the ratio of the water content to the cement content is predicted.

关 键 词：水泥土 高含水量 三轴剪切试验 剪切特性 

分 类 号：U471.8[机械工程—车辆工程]