摘要
本文采用FLAC2d程序,采用显式有限差分法,分析了受向上渗流作用围堰内砂土的渗透破坏。结果表明:当临界水头损失H/D低于2.93时,发生的破坏形式为流土;临界水头损失H/D高于2.93时,发生的破坏形式为管涌;后续的数值模拟结果也证实了这一结论。该方法能准确识别板桩后土壤管涌或流土引发渗透破坏的条件。
In this paper,using FLAC2d program and explicit finite difference method,the seepage failure of sand in cofferdam subjected to upward seepage is analyzed.The results show that when the critical head loss H/D is lower than 2.93,the failure form is flow soil.When the critical head loss H/D is higher than 2.93,the failure form is pipe.The subsequent numerical simulation results also confirm this conclusion.This method can accurately identify the conditions of seepage failure caused by pipe surge or flow soil behind sheet pile.
作者
李伟沛
LI Weipei(Xiaolan Town Water Conservancy Office on Zhongshan City,Zhongshan 528400,China)
出处
《水利科学与寒区工程》
2021年第4期21-25,共5页
Hydro Science And Cold Zone Engineering
关键词
数值模拟
渗透破坏
深基坑
numerical simulation
seepage failure
deep foundation pit
