锦屏一级水电站拱坝无应力计监测成果分析

Analysis of monitoring results of non-stressmeters of arch dam of Jinping Hydropower Station Ⅰ

混凝土自生体积变形在应变计观测资料整理分析中是必不可少的参数,是分析混凝土构件的变形和受力状态的重要参考量,但是目前对混凝土自生体积变形的产生机理尚无一个确切的定论,对其特性也有不同的认识。这就需要对混凝土自身体积变形进行实测,一般情况就是采用无应力计来观测混凝土自身体积变形情况,通过锦屏一级工程实例,对大坝混凝土无应力计监测成果分析来论证混凝土自身体积监测应该主意的问题。

The autogenous volume deformation of concrete is an essential parameter in sorting and analyzing the monitoring data of strain meter,and also is the crucial referencing parameter in the analysis of the deformation and loading situation of concrete components. However,there is no exact conclusion for the generation mechanism of autogenous volume deformation of concrete up to now. So,it is necessary to measure the autogenous volume deformation of concrete,to which,the non-stressmeters are applied generally. Through the case of Jinping Hydropower Station I,the problems in the monitoring of autogenous volume deformation of concrete are demonstrated according to the analysis of the monitoring data by non-stressmeters.