初期集中蓄水对水布垭面板堆石坝变形特性的影响分析  

The Effect of the Initial Concentrated Impoundment on the Deformation Characteristics of Shuibuya CFRD

作　　者：徐琨 杨启贵 周伟[3] 马刚[3] 张超 XU Kun;YANG Qi-gui;ZHOU Wei;MA Gang;ZHANG Chao(Changjiang Institute of Survey, Planning, Design and Research, Wuhan 430010, China;School of Hydraulic Engineering,Dalian University of Technology,Dalian 116024,Liaonin Province, China;State Key Laboratory of Water Resources and Hydropower Engineering, Wuhan University, Wuhan 430072,China)

机构地区：[1]长江勘测规划设计研究院,武汉430010 [2]大连理工大学水利工程学院,辽宁大连116024 [3]武汉大学水资源与水电工程科学国家重点实验室,武汉430072

出　　处：《中国农村水利水电》2020年第6期179-183,共5页China Rural Water and Hydropower

基　　金：国家自然科学基金项目(51579193);湖北省联合培养博士后青年创新人才项目(第一批);水利部土石坝破坏机理与防控技术重点实验室开放研究基金(YK319007)。

摘　　要：面板堆石坝坝体变形主要发生在坝体填筑和水库蓄水过程中,面板浇筑完成后,水库蓄水引起的坝体变形直接关乎面板的受力变形状态。为避免或降低蓄水对面板造成不利影响,开展水库初期集中蓄水对坝体变形的影响分析是非常有意义的。本文根据水布垭面板堆石坝的实测资料,对初期集中蓄水引起的坝体变形增量进行分析,讨论了变形增量的空间分布规律,研究表明:坝体变形受蓄水影响程度沿顺河向逐渐减弱,且坝体越高处该减弱程度越低,约1/2坝高以上部位的变形整体易受集中蓄水影响;坝体水平位移与沉降受初期集中蓄水影响的分布特征相似,但沉降变形所受影响更大。根据以上研究结果初步划分了初期集中蓄水影响区,能为开展坝体分区优化和变形控制研究提供一定参考和指导。The deformation of the concrete face rockfill dam(CFRD)mainly occurs during the construction stage and the reservoir impounding process.The dam deformation caused by the reservoir impoundment affects the deformation of the concrete face directly after the completion of the construction of concrete face.In order to avoid or reduce the adverse effect of impoundment on the concrete face,this paper analyzes the impact of reservoir impoundment on the dam deformation.According to the monitoring data of the Shuibuya concrete face rockfill dam,the deformation increment caused by reservoir impoundment is analyzed,and the spatial distribution rule of deformation increment is discussed.The results indicate that the influence degree of dam deformation affected by water impoundment gradually decreases along the river direction,and the higher the dam body,the lower decrease in the level of influence.The deformation of dam above about 1/2 height is more susceptible to impoundment.The distribution characteristics affected by impoundment of the horizontal displacement and the settlement are similar,but the settlement is more affected.In addition,the influence area of the initial impoundment is preliminary investigated.The result of the work can provide a useful reference and guidance for the optimization study of dam partition and dam deformation control.

关 键 词：面板堆石坝 集中蓄水 坝体变形 实测资料 影响区 

分 类 号：TV641.4[水利工程—水利水电工程]