坝体的稳定是塑料土枕潜坝设计的难点，从坝体的受力情况着手，对镇扬河段和畅洲左汊口门控制工程塑料土枕潜坝及其不同部位的坝体分别进行了稳定性分析与计算。结果表明：该坝体的稳定系数均大于1.5，说明坝体的稳定性较高。通过一年多的运行监测，实践证明坝体是基本稳定的，工程达到了预期的目的。

The stability of a submerged dyke body is the difficult point in the design of a plastic -  soil -  pillow submerged dyke. By the analysis of the forces acting on the submerged dyke located at the entrance of left branch of Hechangzhou river -  branch in the Zhenjiang -  Yangzhou stretch, the calculations on the stabilities of various locations of the submerged dyke were performed. The calculated results indicated that all stability factors are more than 1.5. Through over one year operation and monitoring, it is stable, and its expected targets are good.