关于堤坝软基渗流梯度问题

On Dam＇s Soft Foundation Seepage Gradient Problem

堤坝软基渗流梯度问题，是与地质、水工建筑物结构型式、作用水头等条件密切相关，由于其渗透梯度的大小是直接衡量土体透水性强弱的一个重要物理力学指标，故一直是渗控的难点，为了使堤坝软基渗流梯度问题得到解决，建议在重要的堤坝软基处理工程中采用水工模型试验或原型观测方法，将测试到的不同参数带入推导公式中进行各种工况演算，这样既可获得较可靠地堤坝软基渗流梯度估算值，又可为堤坝软基渗流梯度设计提供较好的技术支撑。

The dam＇s soft foundation seepage gradient problem is closely related to geological and hydraulic engineering building structure form, acting head and other conditions. The size of seepage gradient is an important physical mechanics indexes for measuring water permeability extent of soil body, so it is a difficulty for preventing seepage. In order to solve the dam＇s soft foundation seepage gradient problem, it is recommended to adopt hydraulic engineering model test or prototype observation method during the important dam＇s soft foundation treatment, introduce different parameters tested into derivation formula to conduct various condition calculation, so as to obtain relatively reliable estimate value of dam＇s soft foundation seepage gradient, and provide better technical support for dam＇s soft foundation seepage gradient.