基于实测数据的上海地区超深基坑变形特性研究

Deformation characteristics of ultra-deep foundation pit in Shanghai based on measured data

根据58个上海软土地区19m以上超深基坑数据库,从基坑围护结构水平位移和墙后地表沉降两个方面进行了研究。通过充分的数据挖掘,围护结构水平位移方面,得到了围护结构水平位移曲线形态特征、最大水平位移的位置、归一化的最大水平位移值;墙后地表沉降方面,得到了墙后地表沉降的曲线形态、墙后最大地表沉降值、墙后地表沉降的影响范围。并对这些规律产生的原因进行了机理分析。这些结论可用于超深基坑的变形估算、优化设计以及指导施工。

The database of 58 over-19-meters deep foundation pits helps to study the horizontal displacement of supporting structure and the surface settlement behind diaphragm wall.By fully data mining,the curve feature,and normalized maximum value of the horizontal displacement are obtained.The curve feature,maximum location and the influence range of the surface settlement behind diaphragm wall are also analyzed.These conclusions can be used in estimating the deformation,optimizing the design and guiding the construction for ultra-deep foundation pit.