摘要
为研究不同防水膜的界面参数对喷膜防水衬砌结构力学性能的影响,调研了对地下工程中常用喷涂防水材料,按照粘结强度将其分成了4种类型,并采用ABAQUS软件建立喷膜防水衬砌结构基于地层-结构法的数值模型,计算分析在不同防水膜的界面参数下衬砌结构的内力和界面应力。结果表明:1)防水膜类型的变化对初支的轴力、弯矩及二衬的弯矩影响较小,对二衬轴力影响较大,且随防水膜粘结性能的增加,在隧道大部分位置的二衬轴力都是增大的;2)防水膜类型的变化对界面法向应力影响较小,对界面切向应力影响较大,但各类防水膜条件下界面均未开始产生损伤。据此,在喷膜防水衬砌结构设计时,可弱化不同防水膜因界面参数的不同对衬砌结构力学性能产生的影响。该结果可供隧道喷膜防水材料的选用和衬砌结构的计算参考。
In order to study the influence of different waterproofing membrane interface parameters on the mechanical properties of the composite shell lining structure,the commonly used spray-applied waterproofing materials in underground engineering were investigated and classified into 4 types according to their adhesive strength.ABAQUS was used to establish a numerical calculation model for spray-applied waterproofing lining structures based on the stratum-structure method,and calculate and analyze the internal forces and interfacial stresses of lining structures under different interface parameters of waterproofing membranes.The results show that:1) The change of waterproof membrane type has a small impact on the axial force and bending moment of the initial support and the bending moment of the secondary lining,but a large impact on the axial force of the secondary lining.The axial force of the secondary lining increases with the increase of the adhesive property of the waterproof membrane in most locations of the tunnel;2) The change of waterproof membrane type has little impact on the normal stress of the interface,but has a significant impact on the tangential stress of the interface.However,under various waterproof membrane conditions,the interface does not begin to produce damage.Therefore,when designing the spray-applied waterproof lining structure,the impact of different waterproof membranes on the mechanical properties of the lining structure due to different interface parameters can be weakened.This result can provide reference for selection of tunnel composite shell and lining structure calculation.
作者
何斌
蒋雅君
赵菊梅
刘基泰
裴虎强
HE Bin;JIANG Yajun;ZHAO Jumei;LIU Jitai;PEI Huqiang(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031)
出处
《公路交通技术》
2023年第5期161-168,共8页
Technology of Highway and Transport
基金
国家自然科学基金面上项目(51878570)。
关键词
隧道工程
喷膜防水衬砌
数值计算
防水膜类型
力学性能
tunnel engineering
composite shell lining
numerical calculation
waterproofing membrane types
mechanical property
