渗透系数对饱和土强夯效果影响的数值模拟

英文篇名：Numerical simulation for the effect of saturated soil with changing permeability coefficient under dynamic compaction
中文刊名：有色金属科学与工程
英文刊名：Nonferrous Metals Science and Engineering
作者：邓通发 ; 吴周明 ; 罗嗣海 ; 桂勇
英文作者：DENG Tong-fa ; WU Zhou-ming ; LUO Si-hai ; GUI Yong (School of Architectural and Surveying and Mapping Engineering ; Jiangxi University of Science and Technology ; Ganzhou 341000 ; China)
中文关键词：饱和土 ; 强夯 ; 渗透系数 ; 数值模拟 ; 流固耦合
英文关键词：saturated soil ; dynamic compaction ; permeability coefficient ; numerical simulation ; fluid-solid coupling
出版日期：2012-02-15
机构：江西理工大学建筑与测绘工程学院;
年：2012
期：01
出版单位：有色金属科学与工程

摘要

采用FLAC3D数值软件建立考虑强夯非线性、大变形和流固耦合特性的饱和土地基三维强夯计算模型;应用所建立的计算模型进行渗透系数在0.0001～0.1 cm/s范围内的数值模拟计算,分析渗透系数变化时的位移、孔压、密度和塑性体积的变化特性.从数值计算结果证明了饱和土地基夯击瞬间加固效果与渗透性能有关,渗透系数越大,瞬间夯击效果越好.
3D calculation model of Saturated soil foundation under impacting load was established by the FLAC3D numerical software based on its non-linear character,fluid-solid coupling character and large deformation theory.The permeability coefficient ranging from 0.0001 cm/s to 0.1 cm/s was calculated in numerical simulation.The calculation results were applied to analyze the variation characteristics of displacement,pore pressure,density and plastic volume.The results show that the moment reinforcement effect of saturated soil is related to permeability during impacting.The permeability coefficient increases with the adding effect of instantaneous compaction.

引文

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