长江科学院院报2012，Vol.29Issue(10)：98-101,4.DOI:10.3969/j.issn.1001-5485.2012.10.019
考虑土体坍塌的单层堤基管涌数值模拟方法研究
Numerical Simulation of Piping in the Dyke of Uniform Foundation Considering Soil Collapse
摘要
Abstract
To more authentically simulate the process of soil piping, the probable collapse of soil above piping zone should be taken into account. On the basis of soil arch theory and soil collapse mechanism, methods for judging the stability and the collapse of soil above the piping zone in the dyke of uniform foundation were presented. The numerical simulation method and calculation program were improved. By simulating the process of piping in the dyke of uniform foundation of non-cohesive soil and suspension-type cut-off wall, the rules of piping development in the presence of soil collapse above the piping zone were revealed. At the early stage, soil collapse does not happen; when the piping approaches to the cut-off wall, soil collapse occurs; when the piping bypasses the cut-off wall and develops toward the upstream, soil collapse has great influence on the path of piping. It is shown that the real failure zone would be larger than that in the numerical simulated results regardless of soil collapse.关键词
渗流/管涌/坍塌/防渗墙/数值模拟Key words
seepage/ piping/ collapse/ cut-off wall/ numerical simulation分类
建筑与水利引用本文复制引用
刘丹珠,张家发,李少龙,潘家军..考虑土体坍塌的单层堤基管涌数值模拟方法研究[J].长江科学院院报,2012,29(10):98-101,4.基金项目
国家重点基础研究发展计划(2007CB714106) （2007CB714106）
