Abstract: As poor geological conditions at the foundation of open diversion channel of Tongzilin hydropower project, thick overburden layer at the end of the channel made foundation excavation method ineffectual. Sash-shaped underground continuous wall was used to reinforce the soft foundation. Being foundation of major structure, it retained soil and water, bore vertical and horizontal load. However, it was rarely used as structure foundation in hydraulic projects. The paper introduced its structural characteristics and key construction points, for reference.

摘要： 桐子林水电站导流明渠基础地质条件较差，明渠出口末端覆盖层深厚，不具备开挖建基的条件。本工程采用框格式地下连续墙对软弱地基进行加固，作为主体结构的基础，承担挡土、挡水、垂直和水平荷载。地下连续墙在水利水电工程中主要用于基础防渗，用作主体结构的基础，在我国大型水利水电工程中尚不多见。本文介绍了框格式地下连续墙结构特点及关键施工技术，可供类似工程参考和借鉴。