地下管廊橡胶止水带变形性能研究  

Research on Deformation Performance of Rubber Water-stop in Underground Pipe Gallery

作　　者：罗凌晖 Luo Linghui(First Design and Research Institute of Shanghai Municipal Engineering Design Institute(Group)Co.,Ltd.,Shanghai 210000,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司第一设计研究院,上海210000

出　　处：《中国建筑防水》2024年第11期26-32,共7页China Building Waterproofing

摘　　要：通过建立混凝土-橡胶止水带协同变形有限元模型,分析不同工况下橡胶止水带变形性能和防水失效机理,为地下管廊变形缝的防水设计提供参考。计算结果表明:当考虑工程实际中橡胶与混凝土之间存在滑移变形(摩擦系数取0.4~0.8)时,应注意控制管廊标准段间纵向拉伸不超过21.5 mm、压缩不超过9.5 mm;此外,有限元计算结果还表明拉伸工况下橡胶止水带防水失效主要是由于橡胶与混凝土材料之间发生“脱开”,而压缩工况下防水失效则主要是由于橡胶所受最大等效应力超过正常使用状态限值。By establishing a finite element model of collaborative deformation of concrete rubber water-stop,the deformation performance and waterproofing failure mechanism of rubber water-stop under different working conditions are analyzed in this article,providing references for the waterproofing design of deformation joints in underground pipe galleries.The calculation results show that when slip deformation between rubber and concrete in engineering practice(with a friction coefficient of 0.4~0.8)is considered,the longitudinal extension between the standard sections of the pipe gallery should be controlled to no more than 21.5 mm,and the compression no more than 9.5 mm.Moreover,the finite element calculation results also indicate that the waterproofing failure of rubber water-stops under tensile conditions is mainly caused by the detachment between rubber and concrete materials,while the waterproofing failure under compressive conditions is mainly due to the maximum equivalent stress on rubber exceeding the limit of normal use.

关 键 词：地下管廊 变形缝 橡胶止水带 变形性能 摩擦系数 有限元计算 

分 类 号：TU578[建筑科学—建筑技术科学] TU502TU990.3