箱涵顶进施工对地铁隧道变形的影响分析  

Influence Analysis of Box Culvert Jacking Construction on Deformation of Subway Tunnel

作　　者：郭院成[1] 李腾飞 李振 张新武 GUO Yuancheng;LI Tengfei;LI Zhen;ZHANG Xinwu(School of Civil Engineering,Zhengzhou University,Zhengzhou,China,450001;The Fourth Construction Engineering Co.Ltd.,China Construction Second Engineering Bureall,Tianjin,China,300457)

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]中建二局第四建筑工程有限公司,天津300457

出　　处：《沈阳建筑大学学报（自然科学版）》2022年第6期1038-1045,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金面上项目(52078469)。

摘　　要：目的 研究箱涵顶进施工导致下卧既有地铁隧道变形机理,得出隧道结构变形规律以及发展趋势,为箱涵顶进施工设计提供借鉴。方法 基于郑州某跨越地铁的箱涵顶进施工案例,运用ABAQUS软件建立箱涵顶进施工上穿既有盾构隧道的数值分析模型,模拟分析箱涵顶进施工对地铁隧道变形的影响规律。结果 隧道结构因箱涵顶进施工引起的变形响应是三维的,主要体现在隧道整体向上抬升以及顺箱涵顶进方向偏移,隧道沿纵向变形曲线近似于正态分布,隧道距离箱涵越近变形值越大。结论 抗拔桩管幕门式加固措施能减小既有隧道47%的竖向位移值以及使隧道整体水平位移基本归0 mm,并能有效降低顶进施工过程中隧道结构最大位移的增长速率,控制隧道变形效果显著。This paper aims to study the deformation law and the development trend of tunnels caused by the jacking construction of the box culvert above the tunnel and provides a reference for the jacking construction design of box culvert.Based on a case of box culvert jacking construction above the tunnel in Zhengzhou, the numerical analysis model is established by ABAQUS software and the deformation law of the tunnel caused by box culvert jacking construction is simulated and analyzed.The deformation response of tunnel structure caused by box culvert jacking construction is three-dimensional, which is mainly reflected in the overall upward lifting of the tunnel and the deviation of the jacking direction of the box culvert.The tunnel deformation curve along the longitudinal direction is approximately normal distribution, and the deformation of the tunnel is proportional to the distance of the box culvert.The reinforcement measures can reduce the vertical displacement of the existing tunnel by 47% and make the overall horizontal displacement of the tunnel basically return to 0 mm, and effectively reduce the growth rate of the maximum displacement of the tunnel structure during jacking construction, which has a significant effect on controlling tunnel deformation.

关 键 词：地铁隧道 箱涵顶进 数值模拟 变形 隧道保护 

分 类 号：TU93[建筑科学—结构工程] U452.2[建筑科学—桥梁与隧道工程]