Abstract:The construction of urban bridges is often adjacent to the existing underground subway shield tunnel structure. When the superstructure of prefabricated bridge is constructed, a large lifting crane is needed to hoist the prefabricated beams, which will cause the additional ground loads and affect the safety of the adjacent underground subway shield tunnel structures. In order to ensure the safe operation of the subway structure, it is necessary to conduct a security assessment. How to calculate the impact of prefabricated beam bridges during the hoisting construction on the safety of underground subway structures, two calculation methods are proposed to preliminarily analyze the impact of hoisting loads on subway shield tunnel structures. The calculation and analysis results are basically close to the monitoring data results, which can be used as a reference for similar engineering designs.
