某斜抛撑深基坑变形险情原因分析及应对措施  

Cause analysis and countermeasures of deformation danger of a deep foundation pit with oblique propped support

作　　者：张明 Zhang Ming(China Academy of Building Research,Beijing 100013,China)

机构地区：[1]中国建筑科学研究院有限公司,北京100013

出　　处：《山西建筑》2025年第7期63-67,共5页Shanxi Architecture

摘　　要：以某斜抛撑深基坑的应急抢险为例,从施工单位因未按设计要求进行基坑降水和土方开挖、未经过设计许可超挖坑内留土,私自减小坑内留土宽度及高度等方面分析了导致基坑水平位移远远超出规范报警值的原因,论述了坑内回填土、增设临时斜支撑等应急措施,达到了保证基坑安全的效果。并对施工现场实际情况进行了施工模拟分析,提出了坑内留土保护措施的方法,希望为以后斜抛撑深基坑设计和施工提供借鉴与参考。This paper takes the emergency rescue of a deep foundation pit with oblique propped support as an example,discusses the construction unit because of the design requirements for foundation pit dewatering and earthwork excavation,without the design permission to excavate the pit to leave the soil,secretly reduce the width and height of the soil to leave the pit and other reasons cause the horizontal displacement of the foundation pit far exceeds the standard alarm value,expounds on the pit backfill soil,additional temporary oblique support and other emergency measures,to ensure the safety of the foundation pit.And the actual situation of the construction site for the construction simulation analysis,put forward the pit to leave the soil protection measures,hoping to provide reference for the future design and construction of deep foundation pit with oblique propped support.

关 键 词：斜抛撑 深基坑 变形 应急抢险 盆式开挖 坑内留土 

分 类 号：TU473.2[建筑科学—结构工程]