紧邻既有建筑物的异形深基坑支护设计与施工变形控制技术

Design of supporting system and construction deformation control technology of special shaped deep foundation pit adjacent to existing buildings

针对某深基坑异形且紧邻既有建筑物的特点,根据增大基坑阳角处侧向支撑的刚度和承载力及提高异形部位和紧邻既有建筑物部位设计安全冗余度的原则,优化了基坑支护体系,增设了多项施工变形控制措施,加密了基坑局部监测点布置。通过对基坑施工监测数据的分析证实该方案实施效果良好,并基此,总结了基坑设计与施工变形控制的技术措施。

In view of the characteristics of a deep foundation pit with abnormal shape and adjacent to the existing buildings,the foundation pit support system is optimized by increasing the stiffness and bearing capacity of the lateral support at the external corner of the foundation pit and improving the design safety redundancy of the abnormal shape and adjacent to the existing buildings.A number of construction de-formation control measures are added,and the layout of local monitoring points of the foundation pit is densified.Through the analysis of the monitoring data of foundation pit construction,it is proved that the implementation effect of the scheme is good.Based on this,the technical measures of foundation pit design and construction deformation control are summarized.