二滩拱坝安全监测资料分析

Safety monitoring and analysis of Ertan arch dam

二滩水电站混凝土双曲拱坝坝高240m,是已建成的中国第一高坝和世界同类型第三高坝,拱坝自1998年下闸蓄水至今已经安全运行10年。本文对高拱坝安全监测设施布置和监测方法行了总结,对较长系列的变形、应力、温度场、渗流和渗压等监测资料进行了全面的分析和整理。监测结果和定期检验表明,二滩大坝的工作性态正常,其监测设计与运行管理措施是合理和有效的。相关经验可为我国在建和拟建的高拱坝工程提供有益的借鉴。

Ertan concrete arch dam is 240m high,ranking the first in China and the third in the world of the same type.Since the impoundment in 1998,the dam has been operating safely for 10 years.This paper summarizes the arrangement of field safety monitoring equipment and monitoring methods,and then provides a summary and comprehensive analysis on the monitored data series,such as deformation,stress,temperature,seepage flow and osmotic pressure.Monitoring results and regular test show that,the dam is in normal working state,and the design of its monitoring equipment and its operational management are rational and effective.The related experiences could be useful for the other high arch dams under construction and to be constructed.