用于盾构管片接缝的环氧树脂力学性能研究  

Study on Mechanical Properties of Epoxy Resin for Joints of Shield Tunnel Segments

作　　者：刘建国[1] 潘婕 Liu Jianguo;Pan Jie(College of Transportation Engineering,Tongji University,Shanghai 201800,China)

机构地区：[1]同济大学交通运输工程学院,上海201800

出　　处：《华东交通大学学报》2022年第1期50-58,共9页Journal of East China Jiaotong University

摘　　要：环氧树脂是一种用于盾构管片接缝处的堵漏材料,具有广阔的应用前景,系统分析其力学性能的影响因素及变化规律,可为管片接缝堵漏设计及施工提供指导性意见,提高防水能力,延长盾构隧道寿命。本文通过试验和数值模拟对环氧树脂材料进行受力分析,探究相关因素对其力学性能的影响,得出结论:①环氧树脂的黏结强度:干态黏合>湿面黏合>完全水下环境,干态和湿面条件下的黏结强度较高且相差不大,但在完全水下环境中下降程度较为明显。②黏结厚度增加,环氧树脂的黏结强度减小,黏结面应力不均匀程度加重,易在端部产生破坏。③低模量环氧树脂材料具有较强的延展性,可降低应力峰值,能较好抵抗管片接缝变形。④管片位移增大,环氧树脂黏结面应力也随之增大,管片张开量主要影响应力值,管片错台量主要影响应力分布的均匀程度。⑤水压越大,环氧树脂黏结面的应力值越大。Epoxy resin is a kind of plugging material used in the joints of shield tunnels,which has broad application prospects.The systematic analysis of the influencing factors and change rules of its mechanical properties can provide guidance for the design and construction of the joints of the tunnels,thus improving the waterproof capacity and extending the life of shield tunnels.In this paper,the stress analysis of epoxy resin material is carried out through experiments and numerical simulations,and the influence of related factors on its mechanical state is explored.The conclusion is drawn as follows:①The bonding strength of epoxy resin:dry adhesion>wet surface adhesion>complete;in the underwater environment,the bond strength is relatively high under dry and wet surface conditions,and the difference is not much,but the degree of decline is more obvious in the completely underwater environment.②As the bonding thickness increases,the bonding strength of epoxy resin decreases,the unevenness of the bonding surface stress increases,and it is easy to cause damage at the end.③The low modulus epoxy resin material has strong ductility,which can reduce the peak stress and better resist the deformation of the pipe joints.④As the displacement of the tube segment increases,the stress on the epoxy resinbonding surface also increases.The opening amount of the tube segment mainly affects the stress value,and the amount of misalignment of the tube segment mainly affects the uniformity of the stress distribution.⑤The greater the water pressure is,the greater the stress value of the epoxy resin bonding surface is.

关 键 词：环氧树脂 盾构隧道 管片接缝 力学性能 

分 类 号：U214[交通运输工程—道路与铁道工程]