盾构隧道下穿高速公路高架桥施工安全风险评估

摘要

盾构隧道下穿既有构筑物时,不确定因素很多,在施工中极易发生事故,为降低和控制施工风险,有必要对下穿构筑物的施工风险进行评估.根据盾构隧道下穿东环高速公路概况分析和数值模拟计算,结合既有工程经验,采用工程经验评估法对盾构隧道下穿公路高架桥风险进行识别与分析,并提出相应的风险控制措施.%In the shield tunneling under construction, there are a lot of uncertain factors, and it is prone to accidents in the construction. In order to reduce and control the risk of construction, it is necessary to evaluate construction risks. According to the general situation analysis of the shield tunneling under the Donghuan Expressway and numerical simulation, combined with the existing engineering experience, this paper uses engineering experience risk evaluation method to make an identification and analysis of risks in shield tunneling under highway viaduct, and puts forward the corresponding risk control measures.