A Study on the Generation Mechanism and Development Process of Piping Based on the Theory of Muddy Water Seepage

In the process of piping development, sediment carried by seepage causes change porosity and then permeability coefficient. Therefore, belongs to muddy water (i.e., unstable seepage). Based on theory seepage, new control equation model is established. The generation mechanism development for white fine sand gravel are explored. advantages discussed. results show that not only simpler in form but also easier solve can better describe characteristics generation, stability. Compared with (the initial relative density smaller, coefficient critical gradient larger), porosity, coefficient, flow, volume sandy increase faster time. When same, larger. smaller area affected piping, volume. flow smaller. later piping. It provide a reference danger forecast emergency response.