沿海环境下预应力混凝土管桩耐久性寿命预测  

Durability Life Prediction of Prestressed Concrete Pipe Piles in Coastal Environments

作　　者：李兴超 高正阳 孙俊 赵阳 孙飞 

机构地区：[1]国家建筑工程技术研究中心,北京100013 [2]建研院检测中心有限公司,北京100013 [3]中国建筑科学研究院有限公司,北京100013

出　　处：《混凝土世界》2024年第7期36-40,共5页China Concrete

摘　　要：通过预应力混凝土管桩所处沿海环境水样和土样的试验结果,确定其所在环境类别和作用等级,然后结合预应力混凝土管桩氯离子含量、28 d氯离子渗透系数和JTS 153—2015《水运工程结构耐久性设计标准》中关于耐久性寿命预测模型关键参数的取值规定,实现采用JTS 153—2015《水运工程结构耐久性设计标准》中的寿命预测模型对既定工况下预应力混凝土管桩耐久性进行寿命预测的目的,最终判定预应力混凝土管桩是否满足设计使用年限要求。结果表明:预应力混凝土管桩在既有工况下,采用JTS 153—2015《水运工程结构耐久性设计标准》规定的方法计算得出其耐久性寿命预测值为67.75年,满足设计使用年限50年的要求。This article determines the environmental category and action level of prestressed concrete pipe piles based on the test results of water and soil samples in the coastal environment where they are located.Then,combined with the chloride ion content of prestressed concrete pipe piles,the 28 days chloride ion permeability coefficient,and the key parameter values of the durability life prediction model specified in JTS 153—2015 Standard for Durability Design of Port and Waterway Engineering Structure,the purpose of using the life prediction model in JTS 153—2015 Standard for Durability Design of Port and Waterway Engineering Structure to predict the durability of prestressed concrete pipe piles under established working conditions is to ultimately determine whether the prestressed concrete pipe piles meet the design service life requirements.The results show that under existing working conditions,the predicted durability life of prestressed concrete pipe piles is 67.75 years calculated using the method specified in JTS 153—2015 Standard for Durability Design of Port and Waterway Engineering Structure,which meets the requirement of a design service life of 50 years.

关 键 词：沿海环境 预应力混凝土管桩 耐久性 寿命预测 

分 类 号：P75[天文地球—海洋科学] TU473.1[建筑科学—结构工程]