城市敏感环境下深基坑微扰动协同建造与变形主动控制技术研究

Research on Micro-Disturbance Construction and Collaborative Construction Technology for Deep Foundation Pit in Sensitive Urban Environments

摘要: 城市中心区地下空间开发，日益面临着对邻近运营中地铁、老旧建筑等极端敏感设施的严苛变形控制要求。结合上海普陀区真如镇街道社区卫生服务中心异地扩建项目，采用基于“协同建造”理念的深基坑微扰动施工体系，该体系以“全回转钻机微扰动清障”为施工前提，以“分区差异化刚度支护”为刚度基础，以“时空效应分区开挖”为控制策略，以“BIM + 信息化监测”为智能感知平台，最终通过在敏感区域应用“支撑轴力伺服系统”实现变形的主动闭环控制。实证分析表明，该“协同建造”体系将传统的被动防御转变为主动、智能、系统的全过程变形控制，成功解决了城市更新中深基坑施工的重大技术难题，为同类工程提供了可借鉴的实证与理论框架。

Abstract: The development of underground space in urban centers increasingly faces stringent deformation control requirements regarding adjacent operational subways, old buildings, and other highly sensitive facilities. Taking the relocation and expansion project of the Zhenru Town Street Community Health Service Center in Putuo District, Shanghai, as an example, a deep foundation pit micro-disturbance construction system based on the “collaborative construction” concept was adopted. This system uses “full-rotation drilling rig micro-disturbance obstacle removal” as a construction prerequisite, “zonal differentiated stiffness support” as a stiffness foundation, “spatiotemporal effect zonal excavation” as a control strategy, and “BIM + information monitoring” as an intelligent sensing platform. Ultimately, it achieves active closed-loop control of deformation by applying a “support axial force servo system” in sensitive areas. Empirical analysis shows that this “collaborative construction” system transforms traditional passive defense into proactive, intelligent, and systematic full-process deformation control, successfully solving a major technical challenge in deep foundation pit construction during urban renewal and providing a referable empirical and theoretical framework for similar projects.