立体空间下地铁施工对桥梁桩基的影响研究  

Study on the Influence of Subway Construction on Bridge Pile Foundation in Three Dimensional Space

作　　者：刘丽萍[1] 余美娴 高飞 LIU Liping;YU Meixian;GAO Fei(School of Civil&Architecture Engineering,Xi’an Technological University,Xi’an 710021,China)

机构地区：[1]西安工业大学建筑工程学院,西安710021

出　　处：《西安工业大学学报》2022年第3期258-262,共5页Journal of Xi’an Technological University

基　　金：西安工业大学2021年国家级大创项目(202110702052);陕西省自然科学基础研究计划项目(2013JM7004)

摘　　要：为研究立体空间下地铁施工对上部高架桥安全运营的影响问题,依托实体工程,建立模型研究了荷载类型、盾构推力、注浆压力等因素对高架桥桩基水平位移和沉降的影响。结果表明:动荷载作用下桩基的水平位移和沉降均较静荷载作用下大,且更接近现场监测值;桩基与地表存在差异沉降,可能诱发桩基失稳,应引起足够重视。盾构推力对垂直隧道掘进方向水平位移影响较大,呈正相关关系,而对桩基沿盾构掘进方向的水平位移及沉降的影响不明显。注浆压力对桩基水平位移及沉降的影响均显著,注浆压力越大,桩基水平位移越大,桩基沉降越小。In order to study the influence of subway construction on the safety operation of the upper viaduct in three dimensional space,relying on practical project,a model was established to study the influence of load type,shield thrust and grouting pressure on the horizontal displacement and settlement of viaduct pile foundation.The results show that the horizontal displacement and settlement of pile foundation under dynamic load are larger than those under static load,and they are closer to the field monitoring values.Differential settlement between pile foundation and ground surface may induce instability of pile foundation,which should be paid enough attention to.Shield thrust has a great influence on the horizontal displacement in the vertical tunneling direction,which is positively correlated,and has no obvious effect on the horizontal displacement and settlement of the pile along the tunneling direction.The influence of grouting pressure on the horizontal displacement and settlement of pile foundation is significant.The greater the grouting pressure is,the greater the horizontal displacement of pile foundation is,and the smaller the settlement of pile foundation is.

关 键 词：地铁施工 桥梁桩基 立体空间 注浆压力 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]