基于统一强度理论的水平加筋材料复合地基极限分析

Limit Analysis for Composite Ground with Horizontal Geotextiles Based on Unified Strength Theory

结合统一强度理论和极限分析法,对水平加筋增强体复合地基承载力进行了研究。通过对已有以主应力表达的统一强度理论关系式进行变换,导出了以任意平面上的剪应力和正应力表达的统一强度理论关系式;将统一强度理论与相关联流动准则相结合,解决了基于统一强度理论进行极限分析的基本问题;并结合加筋材料对地基极限承载力的影响,对水平加筋材料复合地基进行了极限分析,得到了水平加筋材料复合地基极限承载力计算公式。最后结合工程算例对地基极限承载力的影响因素进行分析,对实际工程具有一定指导意义。

Limit analysis combined with the unified strength theory was applied to calculate the bearing capacity of composite ground with horizontal geotextiles. By substituting the expressions of normal stress and shearing stress on a random plane for the principal stresses, a new expression of unified strength theory was obtained, based on which and the associated flowing rule, some basic questions in limit analysis with unified strength theory was solved. Furthermore, with the influence of reinforcement on ground bearing capacity considered, the above limit analysis method was applied to calculating the bearing capacity of composite ground with horizontal geotextiles. In the end, the calculation method about the bearing capacity of composite ground was applied to analyze influence factors combined with engineer example and the conclusion has some certain value of guidance for its application in actual engineering.