基于变形影响的基坑邻近建筑保护措施研究

Analysis of Protection Measures for Buildings Adjacent to Foundation Pit

城市土地资源的紧张促进了城市地下空间的开发,同时,大量的基坑工程紧邻既有建构筑物,为工程建设带来极大的挑战。随着深基坑的设计理念由“强度控制”转变为“变形控制”,周围既有建筑的保护成为基坑工程中的重点问题。为确保深基坑邻近建筑的安全,综合大量文献资料,总结了深基坑施工引起的建筑变形特征、来源、影响因素和预测方法,基于建筑变形影响因素对目前建筑保护的主要措施和手段进行了分析整理,探讨了各项措施的适应性,结合基坑工程的勘察、建筑保护方案设计、基坑工程施工和信息化施工监测提出了基坑邻近建筑保护综合体系,以期为相关工程和研究提供参考与建议。

The shortage of urban land resources promotes the development of urban underground space,and a large number of foundation pit engineering are close to existing buildings,which brings great challenges to engineering construction.With the design conception of deep foundation pit has been changed from"strength control"to"deformation control",the protection of existing buildings has become a key problem in foundation pit engineering.To ensure the safety of buildings adjacent to deep foundation pit,the characteristics,sources,influencing factors and prediction methods of excavation-induced building deformation were summarized based on a large number of literatures,the major building protection measures at present were analyzed and sorted out based on the building deformation influence factors,and the adaptability of each measure was discussed,the comprehensive protection system of buildings adjacent to foundation pit was put forward combined with the foundation pit engineering investigation,building protection scheme design,foundation pit engineering construction and information construction monitoring,and provide reference and suggestions for related projects and researches.