大渡河枕头坝一级水电站纵向混凝土导墙设计

大渡河枕头坝一级水电站施工采用明渠方式导流。作为导流明渠的重要组成部分,在设计纵向混凝土导墙时利用强风化层中下部玄武岩岩体作为结构的一部分并采用固结灌浆进行处理,对于背水侧需深基坑开挖的深覆盖层基础部位采用梳齿状(框格状)钢筋混凝土连续墙进行处理。从现场导流及度汛情况反映,该设计是成功的,可为其他类似工程提供借鉴。

Design of longitudinal concrete guide wall of Zhentouba I Hydropower Station on Daduhe River

For the construction of Zhentouba I Hydropower Station on Daduhe River，the open channel diversion is adopted. As an important part of the diversion channel，the basaltic rock under the strong-weathered layer therein is utilized as a part of the structure of the longitudinal concrete guide wall and treated with consolidation grouting when the guide wall is designed，while the part of the foundation with deep overburden layer on the land-side that is necessary to be excavated with a deep foundation pit is treated with a comb type（sash type）continuous reinforced concrete wall. The statuses of the in situ diversion and flood-passing show that the design is successful，and then can provide references for the similar project.