受限空间下深基坑内支撑施工技术应用

Application of Construction Technology for Internal Support in Deep Foundation Pits under Confined Space Conditions

摘要: 针对南宁市妇幼保健院保健综合楼项目深基坑周边环境复杂、施工空间受限、变形控制要求高的技术难题，本文系统阐述了钢筋混凝土内支撑支护体系的施工技术应用。重点围绕格构柱–内支撑梁组合体系的施工要点、施工工艺流程、关键工序控制及拆除技术展开研究，该施工技术有效控制了基坑周边变形，实现了良好的技术经济效益，可为同类受限空间深基坑工程提供实操性参考。

Abstract: In response to the technical challenges posed by the complex surrounding environment, limited construction space, and high deformation control requirements of the deep foundation pit project for the Health Care Complex Building of Nanning Maternity and Child Healthcare Hospital, this article systematically expounds on the application of the reinforced concrete internal support system in construction technology. The focus is on the construction essentials, construction process flow, key process control, and removal techniques of the lattice column-internal support beam combination system. This construction technology effectively controls the deformation around the foundation pit, achieving good technical and economic benefits. It can provide practical reference for similar deep foundation pit projects in confined spaces.