水利水电科技进展2016，Vol.36Issue(3)：36-40,46,6.DOI:10.3880/j.issn.1006-7647.2016.03.008
不同轴压下悬挂式防渗墙堤基渗透坡降试验
Experimental study on seepage gradient of embankment foundations with suspended cut-off walls under different axial pressures
摘要
Abstract
In order to study the permeability of highly permeable embankment foundations with suspended cut-off walls, a series of seepage-stress coupling experiments with cut-off walls of three different heights in different axial stress states were carried out. Results show that seepage failure is more likely to occur at the bottom of cut-off walls because of high seepage velocity there, the average seepage gradient of the embankment foundation decreases with the increase of the height of cut-off walls, and the seepage gradient at the bottom of cut-off walls is always maximum along the seepage contour line. Stress states have large effects on the seepage gradient of sand gravel foundations with suspended cut-off walls. There is a parabolic relationship between critical seepage gradient of piping and axial pressure. The seepage gradient causing seepage failure at the bottom of cut-off walls increases linearly with the increase in axial pressure. Based on these results, a linear empirical formula for the seepage gradient causing seepage failure at the bottom of cut-off walls, denoted by the axial pressure, is established.关键词
堤基/防渗墙/渗透破坏/出砂量/渗透坡降Key words
embankment foundation/seepage failure/cut-off wall/amount of sand production/seepage gradient分类
建筑与水利引用本文复制引用
詹美礼,闫萍,尹江珊,唐健,踪金梁,盛金昌,罗玉龙..不同轴压下悬挂式防渗墙堤基渗透坡降试验[J].水利水电科技进展,2016,36(3):36-40,46,6.基金项目
国家自然科学基金(51579078,51474204) （51579078,51474204）
