新疆托海水电站大坝监测设计及运行评价

DAM MONITORING DESIGN AND OPERATION EVALUATION OF TUOHAI HYDROPOWER STATION IN XINJIANG

托海水电站位于新疆伊犁寒冷地区 ,电站主要建筑物双曲拱坝在新疆首次运用。工程区温度变幅大 ,坝体温度场分布不均 ,坝体结构较为单薄。坝体中部开设 3个泄洪孔口 ,坝体底部设有灌浆、观测廊道 ,坝体应力及孔口边界条件复杂 ,对大坝运行安全影响较大。通过分析大坝变形、渗流、应力、温度等监测资料 ,对大坝施工期、运行期的工作状态进行了评价 。

The Tuohai Hydropower Station is located in Yili, a cold district. A double curvature arch dam, the main structure of the hydropower station, is used in Xinjiang for the first time. Because of the great difference in temperature, the temperature field distribution of the dam body is inhomogeneous, and the dam structure is comparatively weak. There are three discharge orifices in the middle part of the dam body, and grouting and observation galleries in the bottom, thus, the dam body stress and orifice boundary conditions are complex, affecting the dam safety. On the basis of analysis of the dam monitoring data of deformation, seepage, stress, and temperature, this article evaluates the performance of the dam during construction and operation. Some problems which are worth attention in the process of the dam design are also discussed.