Safety evaluation of replacement reinforcement quality in abutment contact zones of ultra-high arch dam in first impoundment period based on prototype monitoring

作     者：Bo HU Zhong-ru WU Guan-biao LIU Bin ZHAO Bo XU 

作者机构：NARI Group CorporationState Grid Electric Power Research InstituteNanjing 210003P.R.China College of Water Conservancy and Hydropower EngineeringHohai UniversityNanjing 210098P.R.China 

出 版 物：《Water Science and Engineering》 (水科学与水工程（英文版）)

年 卷 期：2012年第5卷第2期

页      面：210-218页

核心收录：

学科分类：081504[工学-水利水电工程] 08[工学] 09[农学] 0903[农学-农业资源与环境] 0815[工学-水利工程] 

基　　金：supported by the National Natural Science Foundation of China(Grant No51139001) the Natural Science Foundation of Jiangsu Province(Grant NoBK2009479) the Scientific Research Foundation of the State Human Resource Ministry for Returned Chinese Scholars(Grant No2009003) the Scientific Research Foundation for Doctors in Jiangsu Enterprises(Grant No2011-33) the Jiangsu Provincial Postdoctoral Sustentation Fund(Grant No1101049C) 

主　　题：ultra-high arch dam prototype monitoring," compressive stress joint opening," safety evaluation 

摘      要：Reinforcement quality evaluation at the abutment is an important research direction. Prototype monitoring and theoretical derivation were integrated to study the replacement reinforcement quality in abutment contact zones of the Xiaowan ultra-high arch dam. The principles of monitoring layout and design are introduced in detail. Prototype monitoring shows that the increment of the interfacial compressive stress is much larger in the impoundment stage than in the regulating stage. The water pressure and time-effect are two main factors affeeting the interfacial stress. The time-effect is the key factor in the initial impoundment stage, and the water pressure is the key factor after impoundment. The contact properties are significantly improved by grouting. This study shows that there are three typical stages in the joint opening hydrographs, namely the compression stage, opening stage, and stable stage. There is a nonlinear relationship between the joint opening and temperature, which can be well described by the S-function. In conclusion, the reinforcement effect is satisfying, and the abutment is safe.