岩土工程学报2009，Vol.31Issue(11)：1645-1651,7.
考虑砂土颗粒破碎的圆孔扩张半解析分析
Semi-analytical solution to cavity expansion in crushable sands
摘要
Abstract
The cavity expansion theory has been widely used in geotechnical engineering. A modified critical state model is employed to account for the three different modes of compressive deformation, i.e., particle rearrangement, particle crushing and pseudoelastic deformation. In combination with the spatial mobilization plane (SMP) failure criterion and non-associated flow rule, the semi-analytical solutions are obtained to expansion in crushable sands by using the Matlab differential equation solver. In comparison to those solutions where a conventional critical state line is used, the results obtained for Quebec sand indicate that particle crushing does occur at high stress and critical states and affects the stress fields surrounding the cavity and the deformation behaviour. This leads to conclusion that particle crushing has to be taken in account when the cavity expansion theory is used to interpret cone penetration tests and pressuremeter tests.关键词
修正的临界状态模型/空间滑动面屈服准则/临界状态线/颗粒破碎/圆孔扩张Key words
modified critical state model/ spatial mobilization plane criterion/ particle crushing/ cavity expansion分类
建筑与水利引用本文复制引用
蒋明镜,孙渝刚..考虑砂土颗粒破碎的圆孔扩张半解析分析[J].岩土工程学报,2009,31(11):1645-1651,7.基金项目
国家自然科学基金项目(50679057) （50679057）
上海市浦江人才计划(06PJ14088) （06PJ14088）
