摘要
针对某分洪道堤防堤基土具有明显的二元结构、需要采取渗流控制措施的情况,对其建立典型区段的三维有限元模型,计算分析了堤体及地层的渗流特性及渗流主要成因,考虑采用减压井工程措施以降低渗透坡降。选择分洪道洪水期最不利工况,计算得到不同减压井间距下渗流出口的渗透坡降,分析其变化规律。计算结果表明,减压井直径0.8 m、间距12 m的布置方案可以满足堤防渗透稳定要求。
The foundation soils of a floodway embankment exhibited significant dual structure and some measures should be taken to control seepage. A 3D finite element model for a typical section of the floodway was established. The seepage characteristics of the embankment and soil strata as well as the causes for the seepage were analyzed. Relief wells were considered to be employed to reduce the seepage gradient. The most unfavorable work conditions of the floodway during the flood period were selected. The seepage gradients at the seepage exits under different intervals were calculated, and their variation rules were analyzed. The calculated results show that the layout scheme of relief wells with a diameter of 0.8 m and an interval of 12 m can satisfy the seepage stability requirements of the embankment.
出处
《水利水电科技进展》
CSCD
北大核心
2010年第2期67-69,86,共4页
Advances in Science and Technology of Water Resources
基金
河海大学水文水资源与水利工程科学国家重点实验室专项基金(2009586012)
关键词
渗流
有限元法
渗透坡降
减压井
分洪道堤防
seepage
finite element method
seepage gradient
relief well
floodway embankment
