非均质无限深透水地基上土石坝微透水防渗墙的有限元渗流计算

渗流问题是影响土石坝稳定安全的主要因素之一。由于目前良好的坝址在国内外的数量逐日减少,将要建设的许多大坝工程很可能设在非均质无限深透水地基上,因此,对于建在非均质无限深透水地基上的土石坝的渗流研究具有更加实际的意义。为了在满足大坝安全运行的前提下尽可能地减少渗流量,本文采用ABAQUS有限元软件对不同深度的微透水防渗墙进行渗流分析。当防渗墙深度达到10倍的坝前水深时,渗流量减小的效果已不是很明显;当防渗墙深度为2倍的坝前水深时,渗透坡降就已经满足要求,土石坝的安全运行得到了保证。

Finite element calculation of micro porous seepage control wall of earth-rock dam on heterogeneous infinite deep pervious foundation

The problem of seepage control is one of the main factors that affect the stability and safety of earth -rock dam. Along with the dam locations with the good geologic condition are gradually decreasing in our country, many dams which will be developed likely locate on the heterogeneous infinite deep pervi- ous foundation. Therefore, the research upon seepage control on earth - rock dam built on the heterogene- ous infinite deep pervious foundation has more practical significance. In order to reduce the seepage flow as far as possible under the premise of meeting the safe operation of darn, the paper used ABAQUS finite element software to analyze the seepage of micro porous seepage control wall at different depths. When the depth of seepage control wall reaches 10 times as high as upstream water depth, the amount of seep- age reduction of dam is not obvious. When depth of the vertical impermeable wall reaches 2 times up- stream water depth, the seepage gradient can meet the requirement, the safe operation of earth - rock dam is guaranteed.