Abstract: Anti-seepage at the permanent ship lock foundation is the key part in the whole closed proof system in the Three Gorge Project. The monitoring results have shown that water level behind foundation curtain was lower than that in reservoir and has been effected less. The reduction factor of seepage pressure is less than design value. The underground water level at the two sides of mountain higher than that in reservoir matched the location topography, and has closed relationship with the rainfall. Each measuring point changed periodically.

摘要： 永久船闸基础防渗是三峡枢纽工程封闭防渗系统的一个重要部分。渗流监测成果表明：基础幕后水位低于库水位，且受库水位影响小，渗压折剪系数小于设计值。两侧山体地下水位高于库水位与所处地形匹配，且与降雨量密切相关，由山体潜水引起；各测点变化随时间呈周期性变化。