地铁车站基坑工程建设风险识别与预控

Risk Identification and Control in Construction of Metro Station Foundation Pit

为满足城市交通需求,近几年城市地下轨道工程建设发展迅猛。由于地下工程施工受到地质条件及周围环境的影响,施工风险比地面工程要复杂得多,为避免施工事故发生导致巨大损失,对施工进行风险分析和制定预控措施是非常有必要的。结合南京地铁2号线一期工程车站基坑工程,对地铁车站基坑工程的建设施工风险进行了识别。在风险识别的基础上,运用风险指数法对风险进行了分析评估,确定了风险发生的概率以及影响的大小。结合工程建设实践经验、专家分析以及相关理论,提出地铁车站基坑工程施工中一些典型风险和基坑范围内管线安全风险的预控措施。

Recently, to satisfy the urban traffic demand, underground track projects develop rapidly. As the influence of geological condition and surrounding environment on the engineering construction, risks of underground construction are more complicated than that of ground project. To avoid accidents happening and resulting in great loss, it is very necessary to do risk analysis and make control measures. Combined with foundation pit project of Nanjing Metro Line Two, the risk identification of subway station foundation pit is presented. By using risk index method, risk analysis and assessment is carried out on the base of risk identification, and the probability and influence of risks is defined. Some control measures to typical risks and risks of pipe line about metro station foundation pit were brought forward on the base of practice experience of constru ction, expert analysis and correlative theories.