川黔线既有桥梁混凝土残余寿命预测研究

Residual Life Prediction Research on Chuan-Qian Railway Bridge Concrete

该研究基于碳化试验的经验模型,结合川黔线既有桥梁所处的环境以及当时的施工条件,提出相应环境条件下川黔线既有桥梁混凝土寿命预测模型,并结合现场混凝土质量检测数据,对其桥梁及其构件残余寿命进行评估。结果表明:多系数混凝土碳化深度预测模型结果可靠;所检测桥梁残余寿命基本上均可达50年以上,满足桥梁设计的100年使用寿命。

Based on the empirical model of carbonation test, combined with the actual environment and construction condition of Chuan-Qian Railway Bridge Concrete,the life prediction model of the existing bridge concrete was put for- ward, and the residual life of the bridge and its components were evaluated according to the concrete quality data. The results showed that the prediction model of multi-coefficient concrete carbonation depth is reliable. The residual life of the tested bridges can reach more than 50 years,which can meet the 100 year service life of bridge design.