岩土力学2011，Vol.32Issue(10)：3038-3042,5.
统一强度理论在地基承载力确定中的应用研究
Research on application of unified strength theory to determining of bearing capacity of foundations
摘要
Abstract
Based on the unified strength theory, a new formula of critical edge pressure and critical load of subsoil considering the effect of intermediate principal stress σ2 and the static lateral pressure coefficient Ko ≠ 1 is deduced. After contrasting the results of the unified solutions with those based on the Mohr-Coulomb criterion, it is shown that this method can reflect the essentials of foundation bearing capacity more accurately and be conducive to make full use of the strength of foundation. A thorough study of the intermediate principal stress coefficient b has been made through statistical analysis for 177 groups of soil indices and the loading test data of different foundation soils in Hebei province. The result proves that the value of b changes from 0 to 0.50 for the silt and clay soil foundation; and the relative error between the theoretical values of the foundation bearing capacity and the measured values of loading test is generally less than 5%.关键词
临塑荷载/临界荷载/统一强度理论/中间主应力/静止侧压力系数Key words
critical edge pressure/ critical load/ unified strength theory/ intermediate principal stress/ coefficient of lateral earth pressure分类
建筑与水利引用本文复制引用
隋凤涛,王士杰..统一强度理论在地基承载力确定中的应用研究[J].岩土力学,2011,32(10):3038-3042,5.基金项目
河北省建设科技研究计划(No.2009-114). （No.2009-114）
