大直径顶管隧道穿越浑河安全风险分析

发布时间：2018-05-24 19:00

本文选题：顶管 + 隧道工程　；参考：《东北大学》2014年硕士论文

【摘要】：随着隧道及地下工程的迅速发展,各类风险事故不断增加。如何在施工中做好防范措施,降低或防止事故的发生已成为亟待解决的问题,因此开展大直径顶管隧道穿越浑河工程风险识别与评估方面的研究具有重要的理论意义与工程应用价值。论文以大直径顶管隧道穿越浑河这段工程为背景,首先结合隧道工程施工的特点,系统地阐述了隧道风险管理的基本理论。通过分析顶管法穿越浑河施工的风险特征和施工的重点难点,运用专家调查法和预先危险性分析法辨识出浅覆土引起隧道塌方涌水等、工作面失稳等风险。其次建立了大直径顶管隧道穿越浑河的安全风险评估体系。结合人-机-环境系统,提出了工程穿越浑河的施工安全风险的主要影响因素包括人-机-环境风险因素、施工设备风险因素、作业人员的风险因素等五个一级影响因素,每个一级影响因素又包含若干二级影响因素。然后运用预先危险性分析法和模糊综合评判法完成了大直径顶管隧道穿越浑河的安全风险评估,得出顶管施工时,在一级影响因素中,穿越河中段和顶管推进阶段的风险最大。在二级影响因素中,浅覆土造成隧道塌方涌水等、工作面失稳、隧道上浮和轴线偏离过大等风险较大。施工时应该注意这几个阶段和因素,提高警惕,提前做好防范,提高施工整体安全性。最后针对大直径顶管隧道穿越浑河工程的施工提出了施工应急预案,在事故发生时能在第一时间采取行动,将损失降到最小。然后建立了顶管法(沈阳地区)施工安全风险管理系统,并将本工程在系统里实现。得出突遇难以逾越的障碍物等为极高风险,需高度重视并规避。管理风险等为高度风险,需采取措施并加强监测。工作井塌方等风险为中度风险,需采取风险处理措施。
[Abstract]:With the rapid development of tunnel and underground engineering, all kinds of risk accidents are increasing. How to do a good job in the construction of preventive measures to reduce or prevent the occurrence of accidents has become an urgent problem, Therefore, it is of great theoretical significance and engineering application value to study the risk identification and evaluation of large diameter pipe-jacking tunnel crossing Hunhe River. Based on the project of large diameter pipe jacking tunnel crossing Hunhe River, the basic theory of tunnel risk management is expounded systematically according to the characteristics of tunnel construction. Based on the analysis of the risk characteristics of pipe jacking method and the key and difficult points in the construction of the Hunhe River, the authors use the expert investigation method and the pre-dangerous analysis method to identify the risks such as the collapse of the tunnel due to shallow overlying soil and the instability of the working face. Secondly, the safety risk assessment system of large diameter pipe jacking tunnel across Hunhe River is established. Combined with man-machine-environment system, the main influencing factors of construction safety risk of engineering crossing Hunhe river include human-machine-environment risk factor, construction equipment risk factor, operator risk factor and so on. Each level of influencing factors also contains a number of secondary factors. Then the safety risk assessment of large diameter jacking tunnel through the Hunhe River is completed by using the method of pre-risk analysis and fuzzy comprehensive evaluation. It is concluded that the risk of crossing the middle section of the river and the stage of pipe jacking is the biggest in the first stage of pipe-jacking construction. Among the secondary influencing factors, the shallow overlying soil causes tunnel collapse, water gushing and so on, the face is unstable, the tunnel floats and the axis deviates too large and so on the risk is great. During construction, we should pay attention to these stages and factors, raise our vigilance, do a good job of prevention in advance, and improve the overall safety of construction. Finally, a construction emergency plan is put forward for the construction of a large-diameter pipe-jacking tunnel crossing the Hunhe River, which can take action at the first time when the accident occurs and minimize the loss. Then the pipe jacking method (Shenyang area) construction safety risk management system is established, and the project is realized in the system. It is concluded that the sudden encounter of insurmountable obstacles is extremely high risk and should be highly valued and avoided. Risk management is high risk, need to take measures and strengthen monitoring. Working well collapse and other risks are moderate risk, need to take risk treatment measures.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U455

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