On the basis of the undrained shear strength being the logarithm function of the disturbance degree, the elastoplastic solution of the cylindrical expansion is obtained.
在考虑塑性区内不排水强度是扰动度的对数函数的基础上，得到了考虑扰动的球形孔扩张的弹塑性解答。
But many tests show the shear strength of the rockfill material is a nonlinear function of the normal stress.
试验表明堆石材料的抗剪强度更符合非线性表达式。
On such a basis, a performance function based on the shear strength envelope curve in the shape of quadratic parabola was established.
在此基础上，建立了基于二次抛物线形抗剪强度包络线的功能函数。
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