周边敏感环境下深基坑施工微扰动技术与主动补偿方法研究  

Study on Micro-disturbance Techniques and Active Compensation Methods for Deep Foundation Pit Construction in Sensitive Surrounding Environments

作　　者：徐利彬 尤雪春 XU Libin;YOU Xuechun(Shanghai Construction No.7(Group)Co.,Ltd.,Shanghai 200050,China)

机构地区：[1]上海建工七建集团有限公司,上海200050

出　　处：《建筑施工》2024年第9期1481-1484,共4页Building Construction

基　　金：上海建工集团股份有限公司重点研发计划(22JCSF-09)。

摘　　要：为了研究周边敏感环境下深基坑施工微扰动技术与主动补偿方法,依托实际工程项目,确定了轴力伺服钢筋混凝土支撑系统的分级加载、保压方案,分析了轴力伺服加载前后基坑围护结构侧向位移变化。最终结论为:轴力伺服系统可以有效减小基坑围护结构侧向变形,实现对邻近地铁的微扰动;轴力伺服应分级加载,并依据围檩与地下连续墙脱开量确定最终保压值;应通过优先在邻近地铁处进行轴力伺服加载主动补偿该位置基坑围护侧向变形。To investigate micro-disturbance techniques and active compensation methods for deep foundation pit construction in sensitive surrounding environments,an actual project is utilized to determine the graded loading and pressure-holding schemes of the axial force servo reinforced concrete support system.The lateral displacement changes of the foundation pit retaining structure before and after axial force servo loading are analyzed.The conclusions indicate that the axial force servo system effectively reduces lateral deformation of the foundation pit retaining structure,achieving micro-disturbance control near adjacent subways.Axial force servo loading should be applied in stages,with the final pressure-holding value determined based on the separation between the purlin and the diaphragm wall.Active compensation for lateral deformation of the foundation pit support should prioritize axial force servo loading near the subway.

关 键 词：基坑工程 钢筋混凝土支撑 轴力伺服系统 微扰动 主动补偿 

分 类 号：TU746[建筑科学—建筑技术科学]