摘要
含水率的变化会影响膨胀土地基承载力。通过大型模型试验,研究了不同干密度膨胀土地基浸水前后承载力变化情况,结果表明浸水将显著影响膨胀土地基的承载力,浸水后地基极限承载力只有浸水前的12%～14%,而比例界限段的斜率则增加50～65倍。土体干密度对其承载特性和破坏型式影响较大。分析了承载力随含水率的变化规律,验证了膨胀土地基承载力的计算方法。研究成果对膨胀土地基承载力计算具有重要的理论和工程实际意义。
The bearing capacity of expansive soil would be influenced by its water content. Large,scale model tests were carried out to study the influence of inundation on the bearing capacity of expansive soil foundation of different dry densities, It is indicated that wetting would influence the bearing capacity of expansive soil foundation remarkably. The ultimate bearing capacity after wetting is only 12%-14% of that before wetting, and the slope of proportional limit increases by 50-65 times. The bearing behaviour and failure mode would be influenced by the dry density, The change of bearing capacity with water content is analyzed. The calculation method for bearing capacity of expansive soil foundation is verified, it is instructive for calculation of bearing capacity of expansive soil foundation.
出处
《工程勘察》
CSCD
北大核心
2008年第6期5-8,共4页
Geotechnical Investigation & Surveying
基金
交通部西部交通建设科技资助项目(200231874616)
关键词
承载力
膨胀土地基
浸水
模型试验
计算方法
bearing capacity
expansive soil foundation
wetting
model test： calculation method
