人民长江2025，Vol.56Issue(4)：169-175,7.DOI:10.16232/j.cnki.1001-4179.2025.04.023
悬挂式防渗墙地基渗透破坏特征研究
Seepage failure characteristics of foundations with suspended cut-off walls
摘要
Abstract
Suspended cut-off wall is a common method for seepage control in deep alluvium foundations.To investigate seep-age failure characteristics of foundations with suspended cut-off walls,a model test of seepage failure was carried out by using u-niform sand and an unstable sandy gravel to make the foundation.The seepage failure patterns of the two foundations were ana-lyzed based on the test results.It was revealed that the seepage failure pattern of foundation was related to the internal stability of the soil.Then a three-dimensional finite element model was established based on the model test,and the reliability of the numer-ical model was verified by comparing with the test results.Finally,the effects of the depth,thickness and defects of the wall on the impermeability of the foundation were analyzed by the numerical model.The results show that the seepage failure patterns of uni-form sandy foundation and unstable sandy gravel foundation were backward piping failure and internal erosion failure respectively.The impermeability of the foundation mainly depended on the wall depth and defects in the wall and is irrespective of the wall's thickness.By analyzing the change law of seepage field with the increase of wall depth,it was concluded that the wall had an opti-mal depth that was about 0.7 times of the total foundation depth.关键词
悬挂式防渗墙/渗透破坏/渗流场/模型试验/数值模拟Key words
suspended cut-off wall/seepage failure/seepage field/model test/numerical simulation分类
建筑与水利引用本文复制引用
金伟,张子豪,陈秋怡,王刚..悬挂式防渗墙地基渗透破坏特征研究[J].人民长江,2025,56(4):169-175,7.基金项目
国家自然科学基金项目(52079012) （52079012）
