高面板坝全寿命周期变形控制方法及应用  

Application of methods for life-cycle deformation control of high concrete-faced rockfill dams

作　　者：湛正刚 张合作 程瑞林 邱焕峰 ZHAN Zheng-gang;ZHANG He-zuo;CHENG Rui-lin;QIU Huan-feng(PowerChina Guiyang Engineering Corporation Limited,Guiyang 550081,China)

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081

出　　处：《岩土工程学报》2022年第6期1141-1147,共7页Chinese Journal of Geotechnical Engineering

基　　金：国家科技支撑计划(2013BAB06B02);贵州省高层次创新型人才项目(黔科合平台人才[2018]5630)。

摘　　要：高面板坝的变形对面板的安全运行有着特别重要的影响,国内外已建的高面板坝工程中,因坝体变形大导致防渗面板挤压破损,坝体渗漏量大的实例较多,不得不降低水库水位进行修复处理,造成较大的经济损失乃至给大坝的长期运行留下安全隐患。通过发生挤压破损的实例分析,发现变形控制缺乏系统性是发生面板挤压破损的主要因素,为预防面板破损,系统提出了“控制坝体总变形,转化有害变形,适应纵向变形”的坝体变形控制方法,并在使用软硬岩混合料筑坝的董箐面板堆石坝中得到的应用,取得了良好效果,该工程运行至今达十余年,未见面板有挤压破损迹象,该方法对建设200 m以上乃至300 m级超高面板坝具有重要借鉴意义。The deformation of high concrete-faced rockfill dam(CFRD)has a particularly important influence on the safe opercation of impermeable face.To deal with the crushing damage of the impermeable face and the large leakage of dam body,which occurr in many constructed high CFRDs at home and abroad,the reservoirs have to lower the water level for maintenance,which has resulted in large economic losses and even safety hazards for long-term dam operation.Through analyzing the example of a high CFRD with crushing damage,it is found that the lack of systematic deformation control is the main factor for the crushing damage of the face.To prevent the damage of the impermeable face,a systematic method is proposed:"controlling the total deformation of the dam body,transforming harmful deformation,and adapting to vertical deformation".The method has achieved good results in Dongqing CFRD project,which uses mixed hard and soft rocks as dam materials.The project has been operating for more than ten years,and no signs of crushing damage have been detected in the impermeable face.The proposed method provides important reference experience for the design and construction of CFRDs of more than 200 m or even 300 m in height.

关 键 词：高面板堆石坝 坝体变形 变形控制 纵向变形 面板破损 董箐面板堆石坝 

分 类 号：TU43[建筑科学—岩土工程]