人民珠江2025，Vol.46Issue(9)：1-11,11.DOI:10.3969/j.issn.1001-9235.2025.09.001
土体渗透变形评价研究进展及相关问题探讨
Research Progress and Problems of Soil Seepage Deformation Evaluation
摘要
Abstract
In order to improve the evaluation standard of seepage deformation,the problems existing in the evaluation standard of seepage deformation in the current codes and the latest research results were analyzed.The basic problems in the evaluation of seepage deformation,such as the discrimination of soil seepage deformation types,the calculation method of critical gradient,and the influence of seepage direction on critical gradient,were systematically discussed.The difference between the calculated value of the common critical gradient formula and the experimental value of the soil flow type of sandy soil was compared,and the influence of the seepage direction on the anti-seepage strength was analyzed.Moreover,the experimental results of horizontal seepage deformation were summarized.The practical criterion of soil seepage deformation type was put forward according to the principle of selecting the two most important factors affecting the seepage deformation type and conducting discrimination at two levels.In view of the risk existing in the common calculation formula of the critical gradient of the soil flow type for the loose sandy soil,an empirical formula modified according to the porosity was proposed.In view of the poor applicability of the calculation formula of the critical gradient of piping type to continuously graded sandy soil,an empirical formula of critical gradient,porosity,and average particle size was proposed based on the seepage deformation test.It was proposed that the critical gradient of horizontal seepage can be determined according to 1/3～1/2 of the critical gradient of vertical seepage when there are horizontal seepage and escape conditions.关键词
渗透变形/水平渗流/区分粒径/细粒含量/抗渗强度Key words
seepage deformation/horizontal seepage/particle size division/fine grain content/anti-seepage strength分类
建筑与水利引用本文复制引用
张一,王俊智..土体渗透变形评价研究进展及相关问题探讨[J].人民珠江,2025,46(9):1-11,11.基金项目
国家自然科学基金青年基金(41902245) （41902245）
河南省重点研发与推广专项(科技攻关)(232102320314) （科技攻关）
