基坑近接既有地鐵隧道的施工工序研究

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【DOI編碼】：10.3969/j.issn.1008-3197.2025.03.006

Research on Construction Procedure of Foundation Pit Adjacent to Existing Subway Tunnel

GUO Jijie'，ZHANG Xiaoli2*，LI Dayong'，GU Yongcai2 （1.JinanRailTransit GroupCo.Ltd.，Jinan25o14，China;2.ChinaRailwaySixth SurveyandDesignInstituteGroupCo.Ltd. Tianjin ，China）

【Abstract]：Inorder to mitigate the impactof foundation pit excavation on existing tunnels，a case studywas conducted on afoundation pit adjacent to the Jinan Metro Line 2.Through numerical simulation analysis，the influenceof three excavation processes （layer-by-layer，section-by-section，and combined layer-section）on tunnel vertical displacement was systematically investigated.Comparative analysis demonstrated that the layer-section excavation method exhibited the leastimpact on tunnel deformation andaxial force，validated byboth numerical simulation and field monitoring data.

【Key words】： foundation pit;tunnel;excavation and unloading;construction process

隨著我國地下空間開發(fā)進程的加快，基坑近接既有地鐵隧道的案例越來越多。（剩余5252字）