水文地质工程地质2012，Vol.39Issue(4)：66-74,9.
宁波轨道交通地下连续墙深基坑工程变形特性及控制研究
Deformation characteristics and control of foundation pits supporting with diaphgram wall in the Ningbo urban rail transit
摘要
Abstract
Due to different causes of formation and district, soft clay in Ningbo has distinct characteristics, and the deformation characteristics of deep foundation pits are also different from those of soft soil in other areas. Based on the literatures, an information database of 13 case histories of diaphragm wall deformation due to deep excavations in the Ningbo urban rail transit project is presented. The deformation behavior of diaphragm walls is analyzed from the maximum lateral wall displacement and ground settlement. The results show that the maximum lateral displacement ranges from 0. 18%H to 0. 80%H, with a mean value of about 0. 39%H. The deformation is located at the excavation level, increases with the increasing thickness of soft soil, and is larger than that of the other areas. The value of F, is 1. 7. The ground settlement is distributed at range of 0^d/H^ 2. 0, the maximum settlement 8vm - 1. 2% H, the minimum 8VM =0. 15% H, with a mean value about 8VM = 0. 69%H, and the ground settlement is great. In addition, the relationship between lateral wall displacement and ground settlement is 8Vm =1. 08ha ~ 1. 8Shm. The deformation controlling criterion for foundation pits in the Ningbo area is also presented, and it can provide guidance and is used for reference for the excavation engineering in the Ningbo area.关键词
轨道交通/地下连续墙/深基坑/变形特性Key words
rail transit/ diaphgram wall/ deep excavation/ deformation behavior分类
建筑与水利引用本文复制引用
朱瑶宏,叶俊能,刘晓虎,曹茜茜,刘干斌..宁波轨道交通地下连续墙深基坑工程变形特性及控制研究[J].水文地质工程地质,2012,39(4):66-74,9.基金项目
宁波市重大科技攻关项目资助(2009C50004) （2009C50004）
