地铁隧道暗挖施工对既有快速公交车站基础的影响  

Influence of Metro Tunnel Underground Excavation Construction on Foundation of Existing Bus Rapid Transit Station

作　　者：刘加柱 孙礼超 丁银平 张壮 殷小桃 LIU Jiazhu;SUN Lichao;DING Yinping;ZHANG Zhuang;YIN Xiaotao(School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;Urumqi Urban Rail Group Co.Ltd.,Urumqi Xinjiang 830000,China;China Railway 16th Bureau Group Co.Ltd.,Beijing 100018,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]乌鲁木齐城市轨道集团有限公司,新疆乌鲁木齐830000 [3]中铁十六局集团有限公司,北京100018

出　　处：《铁道建筑》2018年第8期79-83,共5页Railway Engineering

摘　　要：对新疆地铁1号线王家梁站洞桩法施工进行有限差分数值模拟,分析了施工对既有快速公交车站基础的影响。分析结果表明:洞桩法作业对地层的扰动具有明显阶段性,其中导洞施工阶段对地层扰动最大,其次是顶部扣拱施作阶段;施工对基础造成较大扰动,基础沉降不满足施工控制及建(构)筑物沉降控制要求。采用注浆区域横跨车站上方的袖阀管注浆加固方案后,将基础最大沉降、基础最大差异沉降分别控制在7.62,1.05 mm,满足施工控制及建(构)筑物沉降控制要求。The f inite difference numerical simulation of Wang jialiang station construction with pile-beam-arch(PBA)method in Xinjiang Metro Line 1 was carried out,and the inf luence of the construction on foundation of existing bus rapid transit station was analyzed.The results show that disturbance of the construction with PBA method to the formation has obvious periodicity,the construction stage of the heading tunnel has the greatest disturbance to the formation and the construction stage of top buckling arch has the second disturbance,the construction causes great disturbance to the foundation,and foundation settlement does not meet the requirements of construction control and construction(structure)building settlement control.By using the reinforcement scheme of sleeve valve pipe grouting with grouting area arching across the top of the station,the foundation maximum settlement and the foundation maximum differential settlement were controlled at 7.62 and 1.05 mm respectively,which could meet construction control requirements and construction(structure)building settlement control requirements.

关 键 词：地铁 地基加固 数值计算 洞桩法 现场实测 袖阀管注浆 

分 类 号：U455[建筑科学—桥梁与隧道工程]