狭窄河谷高面板堆石坝变形控制与结构安全  

Deformation control and structure safety of high concrete faced rockfill dams in a narrow valley

作　　者：王建军 李卓[2,3] 方艺翔 毕朝达 WANG Jianjun;LI Zhuo;FANG Yixiang;BI Chaoda(Ningxia Liupanshan Water Industry Co.,Ltd.,Guyuan 756000,China;Dam Safety Management Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China;Dam Safety Management Center of Ministry of Water Resources,Nanjing 210029,China)

机构地区：[1]宁夏六盘山水务有限公司,宁夏固原756000 [2]南京水利科学研究院大坝安全与管理研究所,江苏南京210029 [3]水利部大坝安全管理中心,江苏南京210029

出　　处：《水利水电科技进展》2022年第4期67-73,共7页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金面上项目(51979173)。

摘　　要：以我国拟建的狭窄河谷区230 m级面板堆石坝为例,系统介绍了狭窄河谷区面板堆石坝变形控制理念和相应的工程措施,通过全面的坝料瞬变、流变和界面特性试验,确定了筑坝料的力学特性参数,对大坝施工填筑、蓄水、运行等状态进行数值模拟,重点评价了长期运行过程中混凝土面板、周边缝等关键部位的应力变形。结果表明,采用设置高趾墩、岸坡增模区、面板分缝优化、合理的预沉降期等措施后,保障了该坝的结构安全。A 230 m high concrete faced rockfill dam(CFRD)built in narrow valley was taken as an example,the deformation control concept and corresponding engineering measures of the CFRDs built in narrow valleys were systematically introduced.The mechanical parameters of the dam materials were determined via comprehensive dam material transient test,rheological test,and interfacial test.The dam behaviors in construction,water storage,and operation period were simulated.The stress and deformation safety of the key parts such as concrete slab,peripheral joints during long-term operation were mainly evaluated.The results show that,after adopting the high concrete plinth,setting high modulus zone,reducing the slab width,as well as proper pre-settlement periods,the structure safety of the dam can be guaranteed.

关 键 词：堆石坝 狭窄河谷 长期安全 变形控制 有限元 

分 类 号：TU45[建筑科学—岩土工程]