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探讨了北京地铁工程邻近桥梁施工风险等级划分应考虑的因素和风险等级划分方法,建议以桥基与地铁工程开挖影响破裂面的位置关系和桥基与地铁工程的水平距离作为主要依据,确定桥梁邻近等级。在此基础上,综合考虑桥梁现状质量,确定邻近桥梁的施工风险等级,并对不同的风险等级给出了相应的邻近桥梁基础加固保护对策,从而形成了对邻近桥梁的控制与保护技术程序,最后通过一个工程实例介绍了对邻近桥桩的评估及处理。
This paper discusses the factors that should be considered in the classification of risk level of adjacent bridges in Beijing metro project and the risk grade classification method. It is suggested that the relationship between the bridge foundation and the subway excavation affecting the rupture surface and the horizontal distance between the bridge foundation and the subway project should be determined Bridge adjacent level. On this basis, the status quo of the bridge is comprehensively considered, the construction risk level of adjacent bridges is determined, and the corresponding reinforcement measures for the adjacent bridges are given for different risk levels so as to form the control and protection technical procedures for the adjacent bridges. Finally, an engineering example is introduced to evaluate and process the adjacent bridge piles.