苏州地铁四号线近接既有隧道的风险评价研究

Study on risk assessment of Suzhou Metro Line 4 close to existing tunnel

为保证近接施工安全,该文以苏州地铁四号线近接既有文陵隧道为工程实例背景,开展了近接施工风险评价研究,即先采用层次分析法构建近接施工风险评价体系,再分别利用1~9标度法和模糊理论确定风险指标的权值和隶属度,以实现近接施工风险等级划分。实例研究表明:各级指标的风险等级分布具有一定差异,但均以三级风险分布相对最多,且近接文陵隧道施工的整体风险得分为66.09,也属三级风险,进而整体评价本次近接施工过程存在一定风险,但风险等级相对较低,不过仍需采取一定的预防措施,以保证施工安全。通过本文研究,有效掌握了近接施工的风险等级,可有效指导现场施工,也为类似工程的风险评价积累了经验,值得进一步推广应用研究。

In order to ensure the safety of the close construction,this paper takes the close construction of the existing Wenling tunnel of Suzhou Metro Line 4 as an example,and carries out the risk assessment research of the close construction,that is,first using the analytic hierarchy process to build the risk assessment system of the close construction,then using the 1-9 scale method and the fuzzy theory to determine the weight and membership of the risk indicators,in order to achieve the risk classification of the close construction.The case study shows that there are some differences in the risk level distribution of indicators at all levels,but the three-level risk distribution is relatively the most,and the overall risk score of the construction of the adjacent Wenling tunnel is 66.09,which is also a three-level risk.Therefore,there is a certain risk in the overall evaluation of the construction process of the adjacent tunnel,but the risk level is relatively low,but some preventive measures should be taken to ensure the construction Safety.Through the study of this paper,we can effectively grasp the risk level of proximity construction,effectively guide the site construction,and accumulate experience for risk assessment of similar projects,which is worth further promotion and application research.