饱和黏土任意固结度强度指标计算公式及工程应用

Formula and Application of Undrained Shear Strength Index of Saturated Clay Under Arbitrary Degree of Consolidation

国内有2位学者建立了饱和粘土任意固结度不排水强度指标的理论公式,文中证明了这2个理论公式是等效的.用任意固结度强度指标计算的强度增长与有效固结应力法是相同的,从而证明了任意固结度强度指标公式的正确性.任意固结度强度指标的优越性在于可以方便应用到地基稳定分析程序中来考虑分期填筑工程地基土强度的增长.结合实例,给出了应用有效固结应力法和任意固结度强度指标计算边坡稳定性的步骤.

In China, two scholars have built the theoretical formulas of undrained shear strength index of saturated clay under arbitrary degree of consolidation. The two formulas＇equivalence was proved in this paper. The method of calculating strength enhancement by strength index under arbitrary degree of consolidation was given, which is essentially consistent with the method of effective consolidation stress, so the theoretical formula of strength index under arbitrary degree of consolidation is correct. The superiority of strength index under arbitrary degree of consolidation is that it can be directly used in stability analysis program for considering strength increase of foundation soil during construction stage. The steps calculating slope safe factor by effective consolidation stress method and by shear strength index under arbitrary degree of consolidation method were given based on an engineering example.