岩土力学 ›› 2021, Vol. 42 ›› Issue (10): 2795-2807.doi: 10.16285/j.rsm.2021.0404

• 基础理论与实验研究 • 上一篇    下一篇

考虑围岩流变及衬砌劣化特性的隧道 长期服役性能解析

刘昌1，张顶立1，张素磊2，房倩1，方黄城1   

  1. 1. 北京交通大学 城市地下工程教育部重点实验室，北京 100044；2. 青岛理工大学 土木工程学院，山东 青岛 266033
  • 收稿日期:2021-03-22 修回日期:2021-06-23 出版日期:2021-10-11 发布日期:2021-10-20
  • 通讯作者: 张顶立，男，1963年生，博士，教授，博士生导师，主要从事隧道及地下工程方面的教学与研究工作。E-mail: zhang-dingli@263.net E-mail:19115030@bjtu.edu.cn
  • 作者简介:刘昌，男，1992年生，博士研究生，主要从事隧道及地下工程方面的研究工作
  • 基金资助:
    中央高校基本科研业务费专项（No. 2021YJS112）；国家重点基础研究发展计划项目（973计划）（No. 2017YFC0805401）；国家自然科学基金（No. 51738002）；高铁联合基金重点项目（No. U1934210）。

Analytical solution of the long-term service performance of tunnel considering surrounding rock rheology and lining deterioration characteristics

LIU Chang1, ZHANG Ding-li1, ZHANG Su-lei2, FANG Qian1, FANG Huang-cheng1   

  1. 1. Key Laboratory for Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China; 2. School of Civil Engineering, Qingdao University of Technology, Qingdao, Shandong 266033, China
  • Received:2021-03-22 Revised:2021-06-23 Online:2021-10-11 Published:2021-10-20
  • Supported by:
    This work was supported by the Fundamental Reasearch Funds for the Central Universities (2021YJS112), the National Program on Key Basic Research Project of China (973 Program) (2017YFC0805401), the National Natural Science Foundation of China (51738002) and the High Speed Railway and Natural Science United Foundation (U1934210).

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摘要： 衬砌劣化普遍存在于隧道工程，对隧道运营安全产生威胁。针对流变岩体中运营隧道衬砌劣化现状，建立了考虑围岩流变及衬砌劣化特性的时效解析模型，分析了隧道全寿命周期内围岩位移、支护反力变化规律。通过数值建模验证了解析模型的正确性，借助本模型对衬砌劣化系数、衬砌厚度、支护时间及围岩流变特性等参数进行敏感性分析，最后对隧道服役性能进行了探讨。研究表明：在围岩流变效应下支护压力随时间增大，而支护结构在服役环境下力学性能逐渐降低，两者的耦合作用缩短了结构达到屈服强度发生破坏的时间；获取了支护荷载及承载能力时程曲线，建立了围岩流变及支护性能劣化耦合作用下隧道服役寿命预测模型；明确指出支护?围岩关系是隧道结构长期安全性的核心内容。

关键词: 运营隧道, 围岩流变, 衬砌劣化, 理论解析, 服役性能

Abstract: Deterioration of lining is a common phenomenon in tunnel engineering that threatens the safety of operating tunnel. For tunnel lining deterioration in rheological rock mass, an analytical model is established which the rheology effect of surrounding rock and deterioration of lining are considered. The surrounding rock displacement and support pressure of tunnel during its service life are obtained. And then the correctness of analytical model is verified by numerical simulation. Subsequently, the sensitivity analyses of deterioration coefficient of lining, thickness of lining, support time, and rheological properties of surrounding rock are carried out by the proposed analytical model. Finally, the service performance of tunnel is discussed. Research shows that under the rheological effect of surrounding rock, support pressure increases with time, while the mechanical properties of support structure decrease with time. Therefore, the time which support structure reaching its yield strength is shortened. Time history curves of support pressure and bearing capacity of lining are then obtained. Based on this, a model for predicting the service life of operating tunnel is established which the rheology effect of surrounding rock and support performance deterioration are considered. Finally, it is stated that the interaction between support and surrounding rock is the core for the long-term safety of operating tunnel.

Key words: operating tunnel, rheology effect of surrounding rock, lining deterioration, analytical solution, service performance

中图分类号: TU 43
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