既有地道桥下修建地铁车站通道的托换加固技术  

UNDERPINNING REINFORCEMENT TECHNIQUE FOR CONSTRUCTING SUBWAY STATION PASSAGE UNDERPASSING THE EXISTING TUNNEL BRIDGE

作　　者：房桢 肖妙武 于晓辉[2] 赵智成 FANG Zhen;XIAO Miaowu;YU Xiaohui;ZHAO Zhicheng(China Communications 2nd Navigational Bureau 3rd Engineering Co.,Ltd.,Zhenjiang 212050,China;Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]中交二航局第三工程有限公司,江苏镇江212050 [2]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,哈尔滨150090

出　　处：《工业建筑》2020年第12期172-179,共8页Industrial Construction

摘　　要：地铁车站施工经常需要下穿既有建筑结构,然而下穿既有地道桥的相关施工经验较少。由于既有地道桥需要保障交通通畅,因此在地铁车站建设的同时保障地道桥的安全和快速恢复交通十分重要。以哈尔滨地铁3号线哈平路站下穿保健路地道桥的施工实践为例,对车站通道上方的地道桥托换加固施工技术进行详细介绍。为了验证该施工技术的可靠性,对车站通道盖挖下穿既有地道桥的施工进行全过程数值模拟,分析托换加固后地道桥在其下部车站通道盖挖施工过程中的沉降变形。分析结果表明:托换加固后的保健路地道桥最大竖向变形仅为2.35 mm,最大应力为0.210 MPa,远小于其抗拉变形和强度设计值,证明了所采用的地道桥托换加固方案可靠性。The construction of underground subway stations often has to underpass the existing building structures.However,there is less relevant construction experience underneath the existing tunnel bridges.As smooth traffic needs to be ensured in the existing tunnel bridges,it is very important to ensure the safety of tunnel bridges and quickly restore traffic while constructing subway stations.Taking the construction of Harbin Metro Line 3 Haping Road Station underpassing the Tunnel Bridge of Health Road as an example,the underpinning reinforcement construction technique of the underpass above the station passage was introduced in detail.To examine the reliability of the construction technology,the whole process of the construction of the passage underpassing through the existing tunnel bridge was numerically stimulated to analyze the deformation settlement of the underpinning reinforced tunnel bridge during the excavation construction at the lower station.The analysis results showed that the maximum vertical deformation of the underpinning reinforced tunnel bridge was only 2.35 mm.The maximum stress was 0.210 MPa,which was much smaller than its tensile deformation and strength design value.This proved the reliability of the underpinning reinforcement scheme adopted for the tunnel bridge.

关 键 词：地铁车站 地道桥 托换加固 车站通道 数值模拟 

分 类 号：U231.3[交通运输工程—道路与铁道工程]