西安地铁2号线区间隧道风险剖析与规避对策

Analytic and Evasive Countermeasures on Tunneling Risk of Xi'an Metro

由风险管理理念入手,针对黄土地区的地质特性,从西安地铁建设周边环境风险、施工措施保证风险、区间隧道设计施工风险控制点等入手,剖析了各风险点的节点位置,并根据实际提出一些有效的规避对策。结合目前西安地铁2号线开工建设以来的工程实际情况,强调了隧道周边外部环境对地铁区间的安全影响性,指出了黄土地区暗挖隧道工程降水辅助措施的重要性,提出了事前剖析风险源的工作意识,给出了暗挖隧道和盾构隧道施工过程中的风险节点以及相应的规避思路。从设计和施工双重角度揭示了西安地铁区间隧道的风险点。

Starting from the concept of risk management, this paper analyzes the location of the risk points directly related to the geological features of the loess area, the surrounding environment risks, the guaranted risks of construction measures and the risk control in interval tunnel design and construction, proposes some evasive countermeasures. According to the actual construction situation of Xi＇ an Metro Line 2, this paper emphasizes the security impact of the external environment of tunnel and the importance of supplementary measures, points out the pre-analysis of risk sources, the risk points and effective evasive countermeasures for bored tunnel and shield tunnel in construction. This paper reveals the risk points in design and construc- tion, calls for more attention on engineering works.