A Study on Optimum Depth of Barrier Wall in Permeable Dam Foundation
Water-repellence of thick overburden under dam base was one of the key problems for dam construction. It had been used in several dam projects that the plastic concrete Wa-ter-barrier and grouting purdah were as waterproof system. The water-barrier construction impropriated the time limit for such project. So, It should been shorted as possible. To stud-y the optimum depth of water-barrier was needed. A parse solution for grads downwards the water-barrier was deduced based on the drag index methods. And it was studied in detail that the law of grads downwards the water-barrier vibrated with its depth increased. The results show that the depth of water-barrier in limited thick overburden was not the deeper the bet-ter. by contraries, it was sure that there was an optimum depth, in which grads downwards the water-barrier was the least. The value of the optimum depth was rest with the depth of the overburden. In general, when the relative depth ratio between the depth of water-barrier and overburden was about 0. 7, when grads downwards the water-barrier was at the least.
Thick overburdens earth dam foundations water-barriers seepage control
Xie Xinghua Wang Guoqing
Logistical Engineering University of PLA, Chongqing 400041, China Nanjing Hydraulic Research Institu Qiantang River Directorial Bureau, Hangzhou,Zhejiang 310016,China
国际会议
International Conference on Dam Safety Management(2008水库大坝安全管理国际研讨会)
南京
英文
57-62
2008-10-22（万方平台首次上网日期，不代表论文的发表时间）