摘要
为分析坝基垂直防渗深度对渗流的影响,利用边界元法对无限深透水地基上土石坝的坝基垂直防渗问题,建立数学模型进行了计算。当进行垂直防渗计算时,无限深透水地基的部分边界难以确定。根据边界法的基本原理,假设从防渗墙以下的某一深度找到一条边界,当从该边界解出的未知量相对较小时,可近似认为所假设的边界就是其实际边界。分析结果表明,在同时满足渗透坡降和渗流量的情况下,建在无限深透水地基上的土石坝坝基防渗墙深度一般应选10~13倍水头。
In order to analyze the influence of vertical waterproof of dam foundation to the seepage,the paper establishes a mathematical model and calculates the vertical waterproof of earth-rock dam foundation situated on the pervious foundation of infinite depth by using the method of boundary element.It is difficult to decide part of boundaries of pervious foundation of infinite depth when calculates vertical waterproof.According to the basic principle of boundary law,it assumes to find a boundary at a certain depth below the cutoff wall.When the unknown quantity obtained from the boundary is relative smaller,it can approximately deem that the assumed boundary is the actual boundary.The outcomes of analysis show that it usually should select 10-13 times water head for the depth of cutoff wall of earth-rock dam foundation situated on the pervious foundation of infinite depth under the conditions of satisfying both percolation gradient and quantity of seepage.
出处
《人民黄河》
CAS
北大核心
2010年第1期132-133,共2页
Yellow River
基金
新疆水利水电工程重点学科基金资助项目(xjzdxk-2002-10-05)
新疆高校科研计划重点基金资助项目(xjEDU2005I09)
关键词
渗流计算
边界元法
无限深透水地基
垂直防渗
防渗墙
seepage calculation
method of boundary element
pervious foundation of infinite depth
vertical waterproof
cutoff wall
