摘要
分析了越江盾构隧道接缝防水密封垫止水机理及耐久性失效成因,基于橡胶接触应力松弛的经时老化模型,针对上海长江隧道三元乙丙弹性密封垫开展了加速热氧老化试验,研究了其接触应力松弛行为,预测了密封垫作为防水材料的使用寿命.
Based on an analysis of the waterproof mechanism and cause of durability failure,a time-dependent aging model concerning the contact stress relaxation of waterproof material was developed and accele-（rated） thermal oxidization test on the ethylene-propylene-diene monomer（EPDM） gasket employed in Shanghai Yangtze river tunnel was conducted.The behavior of contact stress relaxation of gasket was studied and its service life as a waterproof material was predicted.
出处
《建筑材料学报》
EI
CAS
CSCD
北大核心
2009年第5期539-543,共5页
Journal of Building Materials
基金
国家自然科学基金资助项目(50678135)
上海市科委人才计划项目(08R214210)
关键词
越江盾构隧道
防水密封垫
热氧老化
应力松弛
经时老化模型
river-crossing shield tunnel
waterproof gasket
thermal oxidization
stress relaxation
time-dependent aging model
