基坑工程对邻近区间隧道的影响研究  

STUDY ON THE INFLUENCE OF FOUNDATION PIT ENGINEERING ON ADJACENT INTERVAL TUNNELS

作　　者：汤海 TANG Hai(China Railway 18th Bureau Group Third Engineering Co.,Ltd.,072750,Zhuozhou,Hebei,China)

机构地区：[1]中铁十八局集团第三工程有限公司,河北涿州072750

出　　处：《建筑技术》2025年第5期557-560,共4页Architecture Technology

摘　　要：基坑工程施工对相邻区间隧道必然会产生一定影响,了解和掌握基坑施工各阶段的影响尤为重要,通过midas GTS软件研究了基坑工程施工对相邻区间隧道的影响规律:(1)基坑开挖2.5 m,区间隧道变形斜率水平位移>隧道收敛>隧道沉降;(2)基坑开挖至基底,区间沉降明显增加,区间隧道变形斜率隧道沉降>水平位移>隧道收敛;(3)地下结构回筑阶段,区间隧道变形出现回弹,区间隧道变形回弹斜率隧道沉降>隧道收敛>水平位移;(4)施工型钢换撑、拆除支撑阶段,邻近区间隧道水平变形增加较为明显,隧道沉降和隧道收敛略有增加,区间隧道变形增加速率水平位移>隧道沉降≈隧道收敛。The construction of foundation pit will inevitably have a certain impact on the adjacent tunnel,so it is particularly important to understand and master the impact of each stage of foundation pit construction.Through midas GTS software,the influence law of foundation pit construction on the adjacent tunnel is studied:(1)the excavation of foundation pit is 2.5m,and the deformation slope and horizontal displacement of the tunnel>tunnel convergence>tunnel settlement;(2)When the foundation pit is excavated to the basement,the interval settlement increases obviously,and the deformation slope of the interval tunnel is tunnel settlement>horizontal displacement>tunnel convergence;(3)In the stage of underground structure reconstruction,the deformation of interval tunnel rebounds,and the slope of deformation rebound of interval tunnel is tunnel settlement>tunnel convergence>horizontal displacement;(4)In the stage of changing and removing the support of steel during construction,the horizontal deformation of adjacent tunnels increases obviously,while the tunnel settlement and tunnel convergence increase slightly,and the increase rate of deformation of interval tunnels is horizontal displacement>tunnel settlement≈tunnel convergence.The research results have important reference significance for similar projects.

关 键 词：基坑工程 区间隧道 数值模拟 影响规律 变形 

分 类 号：TU74[建筑科学—建筑技术科学]