摘要
渗透破坏是淤地坝最常见的一种破坏方式,为探究PP织物袋对渗透破坏的影响,给病险坝的除险加固提供理论依据,模拟陕北靖边地区的筑坝土料(粉砂质壤土)在渗流作用下的渗透破坏现象及过程,并用PP织物袋装填原状土作为反滤体对比其对原土坝渗透历时、浸润线的影响。结果表明,随着渗透破坏的发生,2个坝体内各个部位的水位高度逐渐增加到一定数值后达到稳定,即当前区域土体达到饱和,坝体内水位高度从坝前向坝后总体呈降低趋势;PP织物袋装填原状土作为反滤体不仅可以减缓坝体内各个部位水位升高的速率,而且可以降低最大水位高度,从而降低坝体浸润线,减缓渗透破坏现象的发生。
Seepage failure is the most common damage to the check dam. To explore the effects of polypropylene geotextile bags on seepage failure,and to provide theoretical basis for dam reinforcement,this paper simulated the seepage damage of the dam soil （silty loam） in Jingbian area of Northern Shaanxi. Polypropylene geotextile bags filled with original soil were used as a filter to its effects on the permeation time and phreatic line of the original dam. The results showed that with the occurrence of seepage failure,the water level height in all parts of the two dams gradually increased to a certain stable value,the current area of the soil was saturated. The dam water level from the front of the dam to the back of the dam decreased. Polypropylene geotextile bags filled with soil as the filter not only could slow the rate of water level in the dam parts, but also reduce the maximum height of the water level, thus reduce the phreatic line of dam and slow down the occurrence of seepage failure.
作者
麻乐乐
朱首军
路东敏
林成行
韩峰
MA Le-le1 , ZHU Shou-jun1,2 , LU Dong-min1 , LIN Cheng-hang1 , HAN Feng2(1. Institute of Soil and Water Conservation ,Northwest A＆F University ,Yangling ,Shaanxi 712100,China; 2. College of Resources and Environment ,Northwest A＆F University ,Yangling ,Shaanxi 712100 ,Chin)
出处
《西北林学院学报》
CSCD
北大核心
2018年第2期213-218,230,共7页
Journal of Northwest Forestry University
基金
陕西水利科技计划项目(2014slkj-23)
关键词
渗透破坏
PP织物袋
浸润线
seepage failure
polypropylene geotextile bags
phreatic line
