山谷贮灰场排渗管的设置对坝体稳定的影响分析

Analysis About Impact on Dam Stability by Setting Percolation Pipe in Valley Ash Yard

针对山谷贮灰场排渗管正常运行与失效后对坝体安全稳定的影响,介绍了设置排渗设施能有效降低浸润线,增加坝体稳定、加速灰渣固结,利于后期子坝继续加高的作用及坝体稳定分析方法。结合某电厂工程实例,采用圆弧滑动静力稳定的分析方法,对排渗管的正常运行与失效、不同的干滩限制长度等多种工况进行了灰坝的静力稳定计算,结果表明:在正常运行条件下安全系数为1.3、非正常运行条件下安全系数为1.1时,灰坝是安全的。

Aiming at the impact on dam stability by normal operation or becoming invalidated of drainage pipes in valley ash yard,introduced set drainage facilities,effectively reduce the infiltration line,increase the stability of the dam,and accelerate ash consolidation,benefit dam heightening latter and stability analysis of dam.Combining with the example of a power plant,using arc slip plane static stability analysis method,static stability calculation of ash dam is carried out under various working conditions such as normal operation or becoming invalidated of drainage pipes,different length of dry beach.Result shows that the safety factor being 1.3under normal operating conditions,the safety factor being 1.1under abnormal operating conditions and the ash dam is safe.