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在基坑支护工程,特别是深基坑支护工程中,基坑监测是十分重要的工作。通过监测能实时掌握基坑的变形与支护体系内力的变化,进而判断基坑是否处于安全状态,为后续施工及时提供信息。通过对基坑从开挖到最后回填整个过程的监测,可以了解基坑支护体系的受力及变形过程,同时又能掌握外界条件的变化对基坑的影响。这些数据及结果可以为以后的基坑支护设计及施工提供参考和改进的依据。本文结合北京地区的深基坑工程实例,从基坑监测的设计及基坑经历长时间的使用过程中的变形数据分析基坑受力及变形的变化规律。
In foundation pit support engineering, especially in deep foundation pit support engineering, foundation pit monitoring is a very important task. Through monitoring, the deformation of foundation pit and the change of internal force of support system can be grasped in real time to judge whether the foundation pit is in a safe state and provide timely information for subsequent construction. Through the monitoring of the entire excavation process from the excavation to the final backfilling, we can know the stress and deformation process of the foundation pit support system and at the same time can grasp the influence of the change of the external conditions on the foundation pit. These data and results can provide reference and improvement basis for the future design and construction of foundation pit support. In this paper, the deep foundation pit project in Beijing is taken as an example to analyze the variation of stress and deformation of the foundation pit from the design of foundation pit monitoring and the deformation data during the long-term use of the foundation pit.