深基坑开挖对邻近运营地铁车站的影响研究  

Analysis of Deep Excavation Influence on the Nearby Operating Metro

作　　者：赵星[1] ZHAO Xing(China Railway Siyuan Survey and Design Group Co.Ltd.,Wuhan 430063)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《土工基础》2025年第1期78-85,共8页Soil Engineering and Foundation

摘　　要：紧邻运营地铁车站开挖深基坑风险高,基坑工程施工引起的地层应力变化,控制不当会引起结构变形或渗漏水风险,进而影响地铁线路的安全和结构耐久性。以实际工程为例,采用Midas-GTS建议三维有限元整体模型,分析富水软弱土层中深基坑开挖对运营车站的影响,计算结果表明,车站主体结构虽然因其自身刚度大,但基坑紧邻主体结构开挖,受到的影响大;附属结构虽然自身刚度小,但距离基坑较远,受到的影响较小。地铁结构均因基坑开挖产生了相对上浮和向基坑方向的水平位移,通过采用地连墙、加固等措施,使得基坑开挖可满足地铁结构变形控制指标。The risk of deep excavation near the subway station is high,the in-situ stress will be changed induced by the deep excavation.The hazards are mainly reflected in the deformation and leakage,and further affect the safety and structural dura-bility of subway lines.A three-dimensional integrated geotechnical-structural model is established by using finite element meth-od.The effect of the excavation of the deep excavation in newly-built metro station is analyzed.The analysis results show that,although the subway station far from the excavation,the structure of subway station is greatly affected by the excavation,be-cause the foundation structure is more adjacent.Although,the accessory structure of the subway station near the excavation,the structure is less affected by the excavation,because it is far from the deep excavation.The horizontal and vertical displace-ment of subway station is caused by the deep excavation,due to the ground wall and reinforcement,the displacement of subway station is controlled.

关 键 词：运营地铁车站 深基坑 变形 有限元 

分 类 号：TU473[建筑科学—结构工程]