软硬不均地层运营隧道病害成因分析及处治对策  

Cause Analysis and Treatment of Tunnel Diseases in Soft and Hard Strata

作　　者：蔺虎平 缑婷 刘燕鹏[1] 李祥 LIN Hu-ping;GOU Ting;LIU Yan-peng;LI-Xiang(CCCC First Highway Consultants Co.,Ltd.,Xi'an 710075,Shaanxi,China;Lanshang Branch Office of Shaanxi Provincial Communication Construction Group,Xi'an 710050,Shaanxi,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,陕西西安710075 [2]陕西省交通建设集团公司蓝商分公司,陕西西安710050

出　　处：《筑路机械与施工机械化》2020年第9期20-24,共5页Road Machinery & Construction Mechanization

基　　金：国家科技支撑计划课题(2014BAG01B02)。

摘　　要：为了准确查明某运营公路隧道路面开裂病害的成因及对其进行处治,通过采用路面钻孔和衬砌钻芯的方法对隧道病害段地层条件、病害现状进行详细调查,据此建立了隧底顺层滑移破坏模型,提出了软硬不均地层路面病害处治对策。研究结果表明,由于软硬不均分界线处的剪切应力超过抗剪强度导致的顺层滑移破坏,是造成本项目隧道病害的主要原因,故应以改善隧底条件、加强洞身结构作为隧道病害处治对策,可以从根本上防止软硬岩不均匀地层运营隧道病害的发生。In order to accurately identify the causes of the pavement cracking disease of an operating highway tunnel and to deal with it,the ground conditions and disease status of the tunnel disease section were investigated in detail by using the methods of pavement drilling and lining core drilling.Base on this,the bedding slip failure model of the tunnel bottom was established,and the treatment countermeasures for the pavement diseases in soft and hard strata were carried out.The results show that the main cause of tunnel diseases in this project is that the shear stress at the boundary between soft and hard strata exceeds the shear strength,which leads to the bedding slip failure.Therefore,the tunnel diseases should be treated by improving the conditions of the tunnel bottom and strengthening the tunnel structure.The treatment can fundamentally prevent the occurrence of tunnel diseases in the soft and hard strata.

关 键 词：隧道工程 软硬不均地层 顺层滑移 处治对策 

分 类 号：U452.2[建筑科学—桥梁与隧道工程]