双箱涵下穿既有车站顶推施工方案研究  

Study on the Incremental Jacking Construction Scheme for Twin Box Culverts Underpassing an Existing Station

作　　者：赵鑫 ZHAO Xin(China Railway 18th Bureau Group No.5 Engineering Co.,Ltd.,Tianjin 300300,China)

机构地区：[1]中铁十八局集团第五工程有限公司,天津300300

出　　处：《国防交通工程与技术》2025年第2期42-48,共7页Traffic Engineering and Technology for National Defence

摘　　要：新建箱涵管廊近距离下穿既有车站容易引起既有车站沉降,特别是变形缝处会产生差异性沉降。为研究多箱涵管廊下穿既有车站产生的影响,依托实际工程,采取数值模拟与现场实测相结合的方法,分析了不同工况下既有车站的沉降规律及变形缝两侧的差异性沉降。研究表明:采用双箱涵通道同步开挖的方法可以有效控制沉降;箱涵顶推过程中测点的沉降规律可近似看作“S”曲线。现场实测表明施工过程中既有车站最大沉降、变形缝两侧最大差异性沉降均满足要求,模拟结果得到了验证。When a newly built box culvert corridor underpasses an existing station at close range,it can induce notable settlement of the station,especially differential settlement at the deformation joint.To investigate the effects of multiple box culverts passing beneath an existing station,a combined approach of numerical simulation and field measurement was employed in an actual project.Settlement patterns under various working conditions were analyzed,focusing on both total settlement and differential settlement on opposite sides of the deformation joint.The results indicate that simultaneous excavation of twin box culverts effectively controls the station's settlement.During the culvert incremental jacking process,the measured settlement-time curve approximately follows as"S"shape.Field measurements confirm that both the maximum station settlement and the maximum differential settlement at the deformation joint remain within acceptable limits,thus validating the numerical simulation results.

关 键 词：顶推施工 近距离下穿 既有车站 沉降变形 变形缝 监测分析 

分 类 号：U445.462[建筑科学—桥梁与隧道工程] U231.4[交通运输工程—道路与铁道工程]