隧道盾构施工对城市桩基扰动的影响评估及控制策略  

Infl uence Assessment and Control Strategy of Tunnel Shield Construction on Urban Pile Foundation Disturbance

作　　者：艾永利 AI Yongli(China Railway 12th Bureau Group Second Engineering Co.,Ltd.,Taiyuan 030032,Shanxi,China)

机构地区：[1]中铁十二局集团第二工程有限公司,山西太原030032

出　　处：《工程技术研究》2025年第1期127-129,共3页Engineering and Technological Research

摘　　要：为研究隧道盾构施工对城市桩基的扰动影响及控制策略,文章结合某城市轨道交通14号线建设工程实例,探讨隧道盾构施工对城市桩基的扰动机制,并基于桩基-土体相互作用理论构建模型,应用FLAC3D和PFC2D软件建立有限元模型。研究结果表明,隧道施工最佳掘进速度为2.0~2.5 cm/min,可有效控制桩基沉降与水平位移;可通过注浆加固进一步降低对桩基的扰动。In order to study the disturbance infl uence and control strategy of tunnel shield construction on urban pile foundation,this paper discusses the disturbance mechanism of tunnel shield construction on urban pile foundation based on the example of a construction project of urban rail transit line 14.The model is constructed based on the pile foundation-soil interaction theory,and the fi nite element model is established by using FLAC3D and PFC2D software.The results show that the optimal boring speed of tunnel construction is 2.0-2.5 cm/min,which can effectively control the settlement and horizontal displacement of pile foundation;the disturbance to the pile foundation can be further reduced by grouting reinforcement.

关 键 词：隧道 盾构施工 城市桩基 有限元模型 注浆加固 

分 类 号：U455[建筑科学—桥梁与隧道工程]