盾构下穿危旧公路立交桥施工参数控制研究  

Study on Construction Parameter Control of Shield Undercrossing Dangerous Old Highway Overpass

作　　者：沈贵斌 Shen Guibin(China Railway 17th Bureau Group Shanghai Rail Transit Engineering Co.,Ltd.,Pudong New Area,Shanghai 200120,China)

机构地区：[1]中铁十七局集团上海轨道交通工程有限公司,上海200120

出　　处：《科学技术创新》2022年第15期131-134,共4页Scientific and Technological Innovation

摘　　要：为控制老旧、繁忙段的立交桥在下穿盾构施工中变形,综合桥梁养护状态、桥梁桩基地层分布等因素,提出盾构施工优化工艺和盾构施工中桥梁沉降指标,最终基于现场变形监测数据分析,发现桥梁桥墩累计沉降值均在3mm以内,沉降监测数据趋于稳定。本文可为相关立交桥加固案例提供参考。In order to control the deformation of the old overpass in the shield construction,the optimization technology of the shield construction and the settlement index of the bridge in the shield construction are put forward considering the maintenance status of the bridge and the stratum distribution of the pile foundation.Finally,according to the analysis of on-site deformation monitoring data,the results show that the accumulated settlement value of the bridge pier is within 3mm,and the settlement monitoring data tend to be stable.This paper can provide reference for related overpass reinforcement cases.

关 键 词：城市轨道 桥梁病害 施工工艺 现场试验 沉降控制 

分 类 号：U231.3[交通运输工程—道路与铁道工程]