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地铁沿线高强度、高密度的物业开发,必然会产生大量的深基坑工程,邻近地铁侧方深基坑开挖便是其中最常见的一种外部作业形式;此类深基坑工程必须采取安全可靠的支护方案来保证基坑和地铁结构的安全。以广州地铁侧方典型深基坑工程为例,介绍了内撑式和双排桩两种常用支护体系的特点及其工程应用情况,并通过地铁位移监测、基坑变形监测分析,探讨了基于地铁保护的深基坑支护设计及变形控制,所举实例的变形监测结果均可满足控制要求,表明合理的支护设计和土方开挖方案能有效控制侧方地铁隧道的变形,可为今后类似工程的设计和施工提供参考和积累经验。
The development of high-intensity and high-density properties along the MTRC will inevitably produce a large number of deep foundation pit projects. The excavation of deep foundation pits adjacent to the side of the subway is one of the most common forms of external operations. Such deep foundation pit projects must be taken Safe and reliable support program to ensure the safety of the foundation pit and subway structure. Taking the typical deep foundation pit project on the side of Guangzhou Metro as an example, this paper introduces the characteristics and engineering application of two types of common support systems with internal support and double row piles. Through the monitoring and analysis of subway displacement and pit deformation, Based on the design and deformation control of the deep excavation supported by the subway, the results of the deformation monitoring in the cited examples can meet the control requirements, which shows that the reasonable support design and earth excavation scheme can effectively control the deformation of the lateral subway tunnel. Future similar projects in the design and construction of reference and gain experience.