岩土力学2012，Vol.33Issue(5)：1375-1380,6.
基于SMP准则柱孔扩张问题相似解
Similarity solutions of cylindrical cavity expansion based on SMP criterion
摘要
Abstract
On the basis of the cylindrical cavity expansion theory, the concept of expansion velocity is introduced into the theory. The movement of the plastic boundary b is taken as the scale of "time" and the stress/strain of any point in the expansion body are described as the functions of the plastic boundary b and the current radius r. By using the spatially mobilized plane (SMP) theory of cohesionless soils in the plane strain condition, non-associated flow rule and considering cohesionless soils' shear dilation, the similarity solution of limit pressure Plim is obtained. Meanwhile, the parametric study indicates that the influence of strength and shear dilation on the limit pressure and plastic zone radius is remarkable. With the increase of strength and shear dilation the limit pressure increases greatly while the plastic zone radius decreases. A comparative analysis shows that the limit pressure calculated from the SMP criterion which includes the effect of intermediate principal stress is obviously greater than that from the solutions based on Mohr-Coulomb criterion. The proposed solutions provide some theoretical bases for geotechnical engineering practices in cohesionless soils, such as cone penetration tests (CPT), jacked piles, and so on.关键词
柱孔扩张/SMP准则/剪胀/极限扩张力Key words
cylindrical cavity expansion/ spatially mobilized plane (SMP) criterion/ shear dilation/ limit pressure分类
建筑与水利引用本文复制引用
刘时鹏,施建勇,雷国辉..基于SMP准则柱孔扩张问题相似解[J].岩土力学,2012,33(5):1375-1380,6.基金项目
国家自然科学基金面上项目(No.50878075). （No.50878075）
