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既有隧道病害分布规律及围岩环境等级划分研究 被引量:33

Study of Defect Distribution Regularity in Existing Tunnels and the Classification of Tunnel Environments
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摘要 既有隧道病害一直是影响隧道结构耐久性的重要顽疾。文章通过对成都铁路局管内近2000座隧道的调查结果分析,发现隧道的修建时间、围岩条件、环境作用等级,以及围岩岩性等因素对隧道病害的分布规律影响明显,IV、V级围岩、地下水发育以及软弱围岩地区的病害防治是研究的重点;通过现场取样调查结果分析,从设计、施工及后期维护三个方面阐述了影响隧道病害的人为因素;依据地下水的发育情况、洞内湿度条件以及围岩岩性这三个基本指标就隧道普遍环境进行了等级划分,提出了一些具体对策。 For existing tunnels, there are many hazards that affect the durability of the tunnel structure. Based on a survey of nearly 2000 tunnels located in the Chengdu Railway Bureau, it was determined that construction time, con- ditions of the surrounding rock, classification of the environment, and lithology of the surrounding rock are the obvious factors affecting the distribution regularities of tunnel defects. This study is focused on the prevention of defects in surrounding rock of grades IV and V, the areas with developed ground water, and weak rock masses. Through field sampling and analysis, the human factors related to tunnel defects are discussed in terms of design, construction, and operation maintenance. Because of the particularity of tunnel structures, the current classification of environment is no longer suitable for tunnels and a new classification for general tunnel environments is discussed considering three basic indicators: the development of ground water, humidity inside the tunnel, and the lithology of the surrounding rock. Some countermeasures are put forward.
出处 《现代隧道技术》 EI 北大核心 2013年第4期35-41,共7页 Modern Tunnelling Technology
基金 铁道部科研开发计划项目(2009G005-E) 中央高校基本科研业务费专项资金资助(SWJTU11ZT33)
关键词 隧道病害 分布规律 围岩环境 等级划分 Tunnel defect Distribution regularity Tunnel environment Classification
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