基于广义八面体理论的岩土参数c、Ф间接求法  

Indirect solving method of soil parameters c and Ф based on generalized octahedral theory

作　　者：黎丹[1] 杨健辉[2,3] 莫苇[4] 李桂[2] 

机构地区：[1]武汉工业学院土木工程系,湖北武汉430023 [2]河南理工大学土木工程学院,河南焦作454003 [3]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [4]中国石化河南油田分公司第一采油厂,河南南阳473132

出　　处：《辽宁工程技术大学学报（自然科学版）》2008年第5期695-698,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50309015)

摘　　要：在真三轴应力状态下,根据岩土剪切破坏面的倾角不同,采用不同的剪切破坏面对正六面单元体进行不断地截取,所得到的一系列连续八面体,即广义八面体。由于正交八面体应力空间可以反映主应力、双剪应力和静水应力,因此可以利用这三种应力成分建立起反映连续八面体应力空间的多项式强度模型,并利用单轴特征试验点和平面4个特征试验点,得到了内摩擦角和黏聚力参数方程。同时,利用线性方程组非满秩的物理意义,建立了多轴特征强度参数关系方程。这些参数方程不仅表明了多轴强度与单轴强度的关系,而且还可以利用其计算所缺失的特征强度,从而可简化岩土参数的测定方法。A serials of octahedral element bodies are cut orderly from cubic element body by different sheafing failure planes with different dip angles for different soils under true triaxial stress state, which is generalized octahedron. Because principal stress and twin-shear stress and hydrostatic stress can be embodied in orthogonal octahedral stress space, so angle of internal friction equation and cohesive force equation are achieved by uni- and bi-axial characteristic test points according to the multinomial strength models built by the above three kinds of stresses. On the other hand, correlation equations of characteristic strength parameters are obtained by the physical meanings of singular of linear equations, which signifies the relations between multiaxial strength and axial strength, and some unknown characteristic strength can be computed by the equations, so the testing method of soil parameters can be simplified.

关 键 词：强度理论 广义八面体 摩尔-库仑理论 多轴强度 岩土参数 特征试验点 

分 类 号：O346[理学—固体力学] TU411[理学—力学]