复杂城市环境下地铁深基坑设计关键技术研究

Research on key technology of subway deep foundation pit design in complex urban environment

随着我国城镇化建设的推进,为实现人民对美好生活的向往,快速便捷的公共交通成为地铁快速发展的助推剂。一线城市已完成多轮地铁建设,后续线路修建面临的周边环境更加复杂,对既有运营线路和邻近建筑物的保护要求更高,以上各种因素给地铁建设带来的安全压力更大。文章以深圳地铁 6 号线松岗站为工程背景,介绍了 6 号线松岗站在建设过程中综合考虑对邻近既有 11 号线和建筑物的影响,开展的深基坑设计关键技术研究,采用 midas-GTS 有限元软件对基坑开挖的影响进行数值分析和对运营线路进行自动化监测分析,提出深基坑关键设计的建议和具体措施,为类似工程提供借鉴。

With the advancement of China's urbanization construction,in order to realize people's yearning for a better life,fast and convenient public transport mode has become the booster of the rapid development of subway.The first-tier cities have completed the construction of several rounds of subway,the surrounding environment of the subsequent line construction is more complex,and the protection requirements of the existing operating lines and adjacent buildings are higher.The above factors bring greater safety pressure to the metro construction.Taking Songgang station of Shenzhen metro line 6 engineering project as an example,this paper introduces the research on the key technologies of deep foundation pit design in the construction process of Songgang station of line 6,which comprehensively considers the impact on adjacent existing line 11 and buildings.Midas-GTS finite element software is used for numerical analysis of impact on foundation pit excavation and automatic monitoring analysis of operating lines.The key design suggestions and specific measures of deep foundation pit are put forward to provide reference for similar projects.