蠕变影响下白垩系泥岩隧洞衬砌力学特性分析  

Mechanical characterization of tunnel lining in Cretaceous mudstone under creep influence

作　　者：裴成元 张思炀 李伯昌 黎成庆 董唯杰 PEI Chengyuan;ZHANG Siyang;LI Bochang;LI Chengqing;DONG Weijie(Xinjiang Irtysh River Investment and Development Group Co.,Ltd.,Urumqi 830000,China;Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]新疆水发建设集团有限公司,新疆乌鲁木齐830000 [2]西南交通大学交通隧道工程教育部重点实验室,四川成都610031

出　　处：《四川建材》2024年第11期64-67,91,共5页Sichuan Building Materials

基　　金：国家自然基金青年科学基金项目:流固耦合效应下隧道挤压性围岩本构模型研究(51808459)。

摘　　要：为探究白垩系泥岩蠕变特性及其对隧洞衬砌结构的长期影响,以北疆某水工隧洞为工程依托进行研究。利用试验结果对Cvisc模型的主要参数进行反演,并结合数值分析,结果表明:白垩系泥岩流变特性显著,对衬砌与围岩的接触力、变形、应力均有明显影响,泥岩蠕变效应随时间增强。在隧洞设计和施工中,必须充分考虑泥岩蠕变效应,采取针对性措施。研究成果为泥质砂岩隧洞长期稳定性评价提供了重要借鉴和指导。In order to investigate the creep characteristics of Cretaceous mudstone and its long-term effects on the tunnel lining structure,the study was carried out based on the engineering of a hydraulic tunnel in Northern Xinjiang.The inversion of the main parameters of the Cvisc model using the test results and numerical analyses show that:the rheological characteristics of the Cretaceous mudstone are significant,which have obvious effects on the contact force,deformation and stress between the lining and the surrounding rock;the creep effect of the mudstone is enhanced with time.In the design and construction of the tunnel,the creep effect of mudstone must be fully considered and targeted measures must be taken.The research results provide important reference and guidance for the evaluation of long-term stability of mudstone sandstone tunnels.

关 键 词：白垩系泥岩 蠕变试验 参数反演 衬砌长期稳定性 数值计算 

分 类 号：TV672.1[水利工程—水利水电工程]