水布垭面板坝实测沉降分析与土石坝沉降统计预报模型  

Analysis on the measured settlement and prediction modeling of statistic settlement of Shuibuya CFRD

作　　者：王彭煦[1] 宋文晶[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水力发电学报》2009年第4期81-85,101,共6页Journal of Hydroelectric Engineering

摘　　要：本文对水布垭面板坝实测沉降进行整理分析,大坝变形监测仪器工作正常,坝体实测沉降分布规律合理,最大沉降为已填筑坝高的1%,推算填筑堆石体垂直压缩模量达100MPa,坝体填筑质量良好。本文考虑土石料变形的影响因素及材料流变特性,应用统计回归方法建立耦合的指数型坝体沉降统计预报模型,与实测数据拟合很好,预测大坝竣工5年后的沉降略有增加。The settlement data measured in situ of the Shuibuya concrete faced rock-fill dam are analyzed,and a coupled prediction model of exponential statistic settlement is proposed.The monitoring instruments of this dam work in good order,and the measured settlement contours show reasonable trends.The maximum settlement is about 1% of the height of constructed rock-fill dam,and the average of the computed vertical compression modulus is above 100MPa,which indicates a satisfactory compaction quality.The proposed prediction model takes into consideration the influencing factors such as gravity weight,water pressure and rheological properties of rock-fill materials.The predicted maximum settlement of the rock-fill dam will be about 2.46m in 5 years after the dam completion.

关 键 词：水工结构 沉降分析 统计回归 土石坝 水布垭面板坝 

分 类 号：TV31[水利工程—水工结构工程]