因此研究管涌机理，并在此基础上研究悬挂式防渗墙对双层堤基管涌的控制效果，具有重要的现实意义。
Therefore, it is very necessary and practical to study the mechanism of dike foundation piping and the effect of suspended cut-off wall.
悬挂式防渗墙能显著提高堤基抵抗管涌破坏的能力，且防渗墙布置在堤防下游侧比上游侧更有效。
Suspended cut-off wall can effectively increase foundation resistance to piping and it is more efficient when it is situated in land side than in river side.
管涌形成主要受控于堤基土体结构、土的物理力学性质和洪水位，经过不断改进的减压井等工程措施对防止管涌是有效的。
The formation of piping is controlled by the structure, physical and mechanical properties of the soil for the base of dike and flood level.
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