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本文扼要总结了以往有关的成果,分析了孔隙水压力的主要影响因素。利用三种原状正常固结饱和粘土探讨了固结不排水三轴压缩试验中孔隙水压力和有效应力表达式,并由有效应力路径的唯一性提出一组适于不同总应力路径的孔隙水压力方程及土体临界孔隙水压力计算式,反映了土的非线性应力应变特性。本文的理论计算值与浙江炼油厂油罐地基实测孔隙水压力值比较接近。
This article briefly summarizes the previous related results and analyzes the main influencing factors of pore water pressure. The expressions of pore water pressure and effective stress in consolidated undrained triaxial compression tests were investigated using three kinds of undisturbed saturated clays. A set of pore water pressures suitable for different total stress paths was proposed by the uniqueness of effective stress paths. The equations and the critical pore water pressure formula for soil reflect the nonlinear stress-strain characteristics of the soil. The theoretical calculation value of this paper is close to the measured pore water pressure of the oil refinery in Zhejiang oil refinery.