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刘  海

 

 

(河南交投郑平高速公路有限公司，郑州 450000)

摘要：衬砌结构受力开裂是隧道常见病害现象，而开裂后隧道衬砌结构安全性如何是值得讨论的问题。针对某公路隧道衬砌裂缝形成原因与类型进行归纳总结，采用离散元软件建立了衬砌顶部单一空洞、顶部与腰部组合空洞数值模型，分析了不同工况的衬砌结构开裂特征与安全系数，评价隧道衬砌结构的安全性。结果表明:衬砌顶部单一空洞影响下，产生了垂直裂缝，结构安全系数最低，顶部处于不稳定状态，需进行加固处理；顶部与左腰双空洞影响下，顶部产生了垂直裂缝与斜裂缝，左腰产生横向裂缝，顶部与左腰安全系数较低，顶部与左腰不稳定需立即加固处理，尤其是空洞范围大于30°时。该成果可为空洞影响下隧道衬砌结构开裂安全评估及加固提供理论参考。

关键词：隧道工程；衬砌空洞；衬砌开裂；安全系数；数值模型

中图分类号：U451

文献标志码：A

文章编号：1005-8249（2025）06-0048-06

DOI：10.19860/j.cnki.issn1005-8249.2025-06-009

 

 

LIU Hai

 

 

(Henan Jiaotou Zhengping Highway Co.,Ltd.,Zhengzhou 450000,China)

 

Abstract：Cracking of lining structures under stress is a common disease phenomenon in tunnels,and the stability of tunnel lining structures after cracking is a topic worth discussing.Summarize the causes and types of cracks in the lining of a highway tunnel A numerical model was established using discrete element software for a single cavity at the top of the lining and a combination of cavities at the top and waist.Analyzed the cracking characteristics and safety factors of lining structures under different working conditions,and evaluated the stability of tunnel lining structures.The research results indicate that under the influence of a single cavity at the top of the lining,vertical cracks are generated,and the structural safety factor is the lowest.The top is in an unstable state,which requires reinforcement treatment;Under the influence of the double cavity at the top and left waist,vertical and diagonal cracks appear at the top,and transverse cracks appear at the left waist.The safety factor of the top and left waist is low,and they are unstable and need to be reinforced immediately,especially when the cavity range is greater than 30°.This achievement can provide theoretical reference for the stability assessment and reinforcement of tunnel lining structure cracking under the influence of voids.

 

Key words：tunnel engineering;lining cavity;lining cracking;safety factor;numerical model

 

作者简介：刘  海(1979—)，男，本科，高级工程师，研究方向:路桥施工。

收稿日期：2023-04-19