纳子峡纤维混凝土面板坝服役期接缝变形特性分析  

Analysis of deformation characteristics of joints of Nazixia fiber reinforced concrete face-slab dam during service period

作　　者：王玉龙 覃源[1] 王迎春 刘海敏 WANG Yulong;QIN Yuan;WANG Yingchun;LIU Haimin(State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China,Xi’an University of Technology,Xi’an 710048,China;Northwest Engineering Corporation Limited,Xi’an 710065,China;Qinghai Huanghe Electric Power Technology co.LTD,Xi’ning 810016,China)

机构地区：[1]西安理工大学省部共建西北旱区生态水利国家重点实验,陕西西安710048 [2]中国电建集团西北勘测设计研究院有限公司,陕西西安710065 [3]国家电投集团青海黄河电力技术有限责任公司,青海西宁810016

出　　处：《西安理工大学学报》2019年第4期472-478,493,共8页Journal of Xi'an University of Technology

基　　金：国家自然科学基金资助项目(51679197);中国博士后科学基金资助项目(2014M562524XB)

摘　　要：混凝土面板堆石坝作为一种典型的水工建筑物,其面板接缝的变形特性直接影响了大坝的渗流稳定及耐久性,此问题在高寒、高海拔地区更为突出。本文基于青海省纳子峡纤维素纤维混凝土大坝面板变形实测数据,研究了纤维混凝土面板堆石坝接缝的变形规律,定量分析了纤维混凝土面板接缝间温升、温降过程中的变形特性。分析结果表明:纳子峡大坝纤维混凝土面板接缝在服役期内,垂直缝两向位移中最大变形量为7 mm,周边缝最大变形量为16.44 mm;蓄水期接缝位移值变化幅度较大,但是在运行期垂直缝及周边缝位移变形均在容许范围内;靠近右岸处的面板垂直缝呈张开状态,其余断面的垂直缝均以压缩状态为主;周边缝三向位移变形值对库区水位和库区温度较敏感,且随二者呈周期性变化。As a typical hydraulic structure,the deformation characteristics of concrete face rockfill dam(CFRD)have a direct impact on the seepage stability and durability of the dam,which is of more prominence in cold and high altitude areas.Based on the deformation data of the concrete face-slab of the Nazixia cellulose fiber concrete dam in Qinghai Province,this paper studies the deformation law for slab joints of CFRD,and systematically analyzes the deformation characteristics of the joints in the process of temperature rise and temperature drop between the joints of the fiber concrete face-slab.The results show that in the service period,the maximum displacement of the vertical joint is 7mm,and that the maximum deformation of the peripheral joint is 16.44 mm.During the impoundment period,the displacement of the joint changes greatly,but in the operation period,the displacement of the vertical joint and the peripheral joint are within the allowable range.The vertical joint of the face plate near the right bank is open,with the vertical joints of the plane being mainly in a compression state.The three-dimensional displacement deformation value of the peripheral joints is sensitive to the water level and temperature in the reservoir area,a periodical changes with them.

关 键 词：纤维混凝土 接缝变形 垂直缝 周边缝 

分 类 号：TV61[水利工程—水利水电工程]