扰动对饱和软粘土园柱形孔扩张问题的影响  

Effect of Disturbance on the Cylindrical Cavity Expansion in Saturated Soft Clay

作　　者：徐书平[1] 刘祖德[2] 凡红[2] 

机构地区：[1]武汉工业学院土木工程系,湖北武汉430023 [2]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《重庆建筑大学学报》2006年第4期63-67,共5页Journal of Chongqing Jianzhu University

摘　　要：根据原位十字板试验过程中,对饱和软粘土扰动导致其不排水强度降低的事实,应用圆柱孔扩张理论,假设饱和软粘土在塑性阶段满足Tresca屈服条件,提出了一种基于饱和软粘土灵敏度的扰动度函数D。考虑在塑性区内不排水强度su是扰动度D的线性函数,得到了考虑扰动的圆柱孔扩张的弹塑性解答。According to the fact that the undrained shear strength decreases in the field vane test, applying the cylindrical expansion theory and assuming that the saturated soft clay satisfies Tresca yield criterion, the disturbance function D is given on the basis of the sensibility of saturated soft clay. Considering the linear function of the disturbance degree D in plastic region, the elastic - plastic degree that the undrained shear strength is solution of the cylindrical expansion has been gained.

关 键 词：饱和软粘土 Tresca材料 圆孔扩张理论 灵敏度 扰动度 线性函数 

分 类 号：TU398[建筑科学—结构工程]