典型堤基渗漏的完整井管涌模型及其涌砂影响范围的估算

Piping Model of Perfect Well for Typical Seepage of Dike Foundation and Its Estimation for Sand Flowing Scope

本文建立了砂砾石堤基在洪水期发生管涌的理论模型 ,建立了管涌临界面方程 ,确定了临界面形状及随江水位上涨临界面的发展趋势 ;根据水流的连续性条件 。

The theoretical piping model and piping critical equation before sand flowing out from dike foundation are established herein.The shape of piping critical and its developing tendency as river water level rising are determined.Based on fluid continuity equation the method to estimate the sand flowing scope is obtained under the condition of definite water level and flow rate.