考虑血吸虫影响的大跨斜拉桥施工安全风险评估

On the Construction Safety Risk Assessment of Large-span Cable-stayed Bridge Considering the Influence of Schistosomiasis

血吸虫病会对湖沼区大跨桥梁的涉水施工造成影响并导致安全风险.为对该风险量化分级并进行针对性的防控,在建立桥梁施工安全风险体系时需要考虑血吸虫影响.以石首长江公路大桥主桥项目为依托,结合现行施工组织和地域环境特点,将洞庭湖区血吸虫感染纳入风险评价体系,对现行《公路桥梁和隧道工程施工安全风险评估指南(试行)》进行了补充完善;开展风险源辨识,建立重大风险源指标体系,评价了血吸虫感染风险等级,并提出防控措施.该桥施工过程中无一人感染血吸虫病,也无其他重大伤亡事故.所建立的考虑血吸虫影响的桥梁施工安全风险方法可为同类项目提供参考.

Chistosomiasis is widely spread in the middle and lower reaches of the Yangtze River,affecting the construction of large-span bridge in lake and marsh area and leading to safety risks.In order to quantify and grade the risk and take targeted prevention and control measures,it is necessary to consider the impact of schistosomiasis and establish a bridge construction safety risk system.Based on the main bridge project of Shishou Yangtze River Highway Bridge,combined with the characteristics of construction organization and regional environment,the current“Guidelines for Safety Risk Assessment of Highway Bridge and Tunnel Construction”is supplemented and improved.The schistosomiasis in the Dongting Lake area is considered in the risk assessment system,the risk source identification is carried out,the major risk source index system is established,the risk level is evaluated,and the prevention and control measures are proposed.During the construction of the bridge,nobody was infected with schistosomiasis and no major casualties occurred.The safety risk method of bridge construction considering the influence of schistosomiasis can provide references for similar projects.