某超大深基坑变形报警原因分析及应对措施

Cause analysis and countermeasures for deformation alarm of a large deep foupndation Pit

由于基坑施工对地层的扰动,基坑内外土层中土应力的重新分布会引起支护结构、地表及周围土层的变形或沉降,进而威胁基坑结构的稳定性及附近建筑物和地下管线的安全,因此对基坑进行监测是保障基坑安全不可或缺的工作。结合工程实例,详细分析监测到的基坑变形值超过预警值的原因,并提出调整方法,以期为相关人员提供参考。

Due to the foundation pit construction of the stratum disturbance, the redistribution of the soil stress will cause the support structure, the surface and the surrounding soil deformation or settlement, will threaten the stability of the foundation pit structure and the safety of nearby buildings and underground pipelines, so the monitoring of the foundation pit is to ensure the safety of the foundation pit is indispensable and necessary work. Combined with the engineering examples, the reasons why the monitored foundation pit deformation value exceeds the early warning value are analyzed in detail, and the adjustment method is put forward,hoping to provide reference for relevant personnel.