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电渗固结是加速软土固结、提高地基承载力的有效技术。传统的电渗固结理论假设土体的物理力学、水力学和电学特性均匀稳定,其理论解答与试验结果差别较大。针对电渗固结处理过程,对土体位移场、渗流场和电场的耦合特征进行了理论分析,根据电荷守恒原理、水流连续原理和Biot固结理论,建立了电渗固结过程的多场耦合控制方程;考虑土体相关特性参数的非线性关系,开发了有限元软件用于分析电渗过程中电场强度、土体位移以及超静孔隙水压力的变化特征。计算结果与理论数据吻合较好,能够反映土体相关特性参数非线性关系对结果的影响。软件能够为电渗固结系统设计提供参考依据。
Electroosmosis consolidation is an effective technique to accelerate the consolidation of soft soil and improve the bearing capacity of foundation. The traditional theory of electroosmosis consolidation assumes that the physical, mechanical and electrical properties of soils are uniform and stable, and the theoretical solutions differ greatly from the experimental ones. According to the process of electroosmosis consolidation, the coupling characteristics of soil displacement field, seepage field and electric field are theoretically analyzed. According to the theory of charge conservation, continuous flow theory and Biot consolidation theory, the multi-field Coupled control equations. Considering the nonlinear relationship between soil parameters, a finite element software was developed to analyze the characteristics of electric field strength, soil displacement and excess pore water pressure during electroosmosis. The calculated results are in good agreement with the theoretical data, which can reflect the influence of the non-linear relationship between the soil characteristic parameters on the results. Software can provide reference for the design of electroosmosis consolidation system.