深基坑紧临施工对既有地铁车站结构影响分析

Analysis of the Impact of the Immediate Construction of Deep Foundation Pits on the Structure of Existing Subway Stations

文章结合深基坑后期近接施工对先期已运营既有地铁车站结构影响的工程实例,进行基坑临近施工全过程数值计算分析。通过计算主要影响区域范围内,基坑施工引起的既有车站结构位移及差异变形,评价基坑施工对整体结构及重要节点位置的影响,判断既有结构受力的不利时机和不利位置,为合理制定施工监测方案,保障运营期行车安全提供现实研究依据。

This article takes into consideration the engineering examples of the impact of late-stage immediate construction of deep foundation pits on the structure of existing subway stations that have been in operation before,and conducts numerical calculation and analysis of the entire process of immediate construction of deep foundation pits.By calculating the displacement and differential deformation of existing station structures caused by foundation pit construction within the main affected area,we evaluate the impact of foundation pit construction on the overall structure and important node locations,and determine the unfavorable timings and locations of stress on the existing structure,to provide a realistic research basis for reasonably formulating a construction monitoring plan and ensuring driving safety during the operation period.