隧道塌方“三段四步法”安全处治技术应用研究  

Application of “Three-section and Four-step” Safety Treatment Technology for Tunnel Collapse

作　　者：吴学智 代成良 刘庆舒 张丹 黄鹏 WU Xue-zhi;DAI Cheng-liang;LIU Qing-shu;ZHANG Dan;HUANG Peng(Chengdu Engineering Co.,Ltd.,of China Power Construction Group,Chengdu Sichuan 611130,China;Huaneng Tibet Yaluzangbujiang Hydropower Development Investment Co.,Ltd.,Lhasa Xizang 850000,China)

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,四川成都611130 [2]华能西藏雅鲁藏布江水电开发投资有限公司,西藏拉萨850000

出　　处：《公路交通科技》2022年第10期123-131,共9页Journal of Highway and Transportation Research and Development

摘　　要：以安全风险极高的“关门式”隧道大塌方为研究对象,以创新的“三段四步法”为技术路线,经工程实例验证,并进行了总结研究。在成功处治多起此类隧道大塌方的基础上,创新了较为通用的隧道塌方“三段四步法”安全处治技术(“三段”是指塌方段及其两端塌方影响段;“四步”是指依次施工的步骤)。本技术方法以隧道塌方段、紧临隧道塌方段的可见塌方影响段和不可见塌方影响段为处治对象。“三段四步法”的主要技术方法为:隧道塌方后,首先根据塌方段及塌方影响段的实际工程地质情况、塌方情况、塌腔稳定情况、塌方影响段的变形情况、设计及施工等情况,综合分析判断各段的安全风险情况,分段评价安全风险大小;其次根据安全风险评价结果,按照从安全风险低的位置向安全风险高的位置逐步推进的方式确定合理的施工顺序及施工步骤。按照此技术方法和对应的技术方案完成“关门式”隧道大塌方处治。以王麻子隧道1~#紧急停车带“关门式”隧道大塌方为例,通过方案比选,以“三段四步法”为处治技术方法,并按对应的技术方案安全有效地处治了隧道大塌方。实践证明“三段四步法”是一种安全有效处治“关门式”隧道大塌方的技术方法,此法具有通用性、可操作性和安全性。Taking the “closed-door” tunnel collapse with high safety risk as the research object, based on the innovative technical route of “three-section and four-step” method, it is verified by engineering example and the summary is carried out. On the basis of successfully treatment of many such large tunnel collapses, the relatively common “three-section and four-step method” safety treatment technology for treatment tunnel collapse treatment is innovated(“three-section” refers to the collapsed section and the collapse-affected sections at both ends, “four-step” refers to the steps of sequential construction). This technical method takes the tunnel collapse section, the visible collapse affected section immediately adjacent to the tunnel collapse section, and the invisible collapse affected section as the treatment objects. The main technical method of “three-section and four-step” method is: after the tunnel collapse, first, according to the actual engineering geological condition of collapse section and the collapse affected section, collapse condition, collapse cavity stability, deformation, design and construction of the collapse affected section, to comprehensively analyze and judge the safety risk of each section, and evaluate the safety risk in sections. Second, according to the result of safety risk evaluation, to determine the reasonable construction sequence and steps according to the way of gradually advancing from the position with low safety risk to the position with high safety risk. According to this technical method and the corresponding technical scheme, the treatment of the “close-door” tunnel collapse is completed. Taking the “close-door” tunnel collapse of Wangmazi tunnel No. 1 emergency parking zone for example, through scheme comparison and selection, the tunnel collapse is treated safely and effectively treated by using the “three-section and four-step” treatment technical method and the corresponding technical scheme. Practice has proved that the “three-sect

关 键 词：隧道工程 三段四步法 塌方处治 关门式大塌方 安全技术 

分 类 号：U458.3[建筑科学—桥梁与隧道工程]