二维固结过程中土体各向异性影响的研究  

Study on the influence of soil anisotropy during two-dimensional consolidation

作　　者：裴美娟 杨鹏 李乐晗 Pei Meijuan;Yang Peng;Li Lehan(School of Civil Engineering,Lanzhou Petrochemical University of Vocational Technology,Lanzhou 730060,China)

机构地区：[1]兰州石化职业技术大学土木工程学院,甘肃兰州730060

出　　处：《山西建筑》2022年第17期96-99,共4页Shanxi Architecture

基　　金：兰州石化职业技术大学教科研项目(KJ2021-06);甘肃省科技厅科技计划(创新基地和人才计划)(JKR2022-51);甘肃省住房和城乡建设厅科研项目(20JR5RA049)。

摘　　要：针对固结过程中土体各向异性对于固结过程影响的问题,围绕二维固结理论开展了研究。建立了各向异性条件下的二维固结控制方程,通过Galerkin法进行了控制方程的离散获得其有限元形式,并基于Python语言编程开发了对应的有限元数值计算程序,进行了算例的数值计算与对比分析,主要结论有:固结过程中各向异性的影响程度与模型的边界条件有关;当两个方向均有排水边界时,各向异性影响明显,与同性结果相比,初期偏差孔压主要集中在不排水边界附近,随着固结过程的进行,逐步向排水边界处发展。各向异性下土体固结过程的研究,能够为黄土等特殊土的工程应用提供技术支持。Aiming at the influence of soil anisotropy on the consolidation process,the two-dimensional consolidation theory is studied.The two-dimensional consolidation governing equation under anisotropic conditions is established,and the governing equation is discretized by Galerkin’s method to obtain its finite element form.The corresponding finite element numerical calculation program is developed based on Python language,and the numerical calculation and comparative analysis of numerical examples are carried out.The main conclusions are as follows:the influence degree of anisotropy in the consolidation process is related to the boundary conditions of the model;when there are drainage boundaries in both directions,the anisotropic effect is obvious.Compared with the isotropic results,the initial deviation pore water pressure is mainly concentrated near the undrained boundary,and gradually develops to the drainage boundary with the consolidation process.The study of soil consolidation process under anisotropy can provide technical support for the engineering application of loess and other special soils.

关 键 词：渗流固结原理 二维固结模型 GALERKIN法 

分 类 号：TU443[建筑科学—岩土工程]