上海软土地区半圆形基坑的实测结果研究

张中杰; 汤翔; 王建华

doi:10.11779/CJGE2014S2078

上海软土地区半圆形基坑的实测结果研究 English Version

1. 上海市城市建设设计研究总院,上海 200092;
2. 上海交通大学土木工程系,上海 200030

详细信息

作者简介:
张中杰（1976- ）,男,高级工程师,主要从事城市轨道交通、地下空间、基坑工程的设计与研究工作。E-mail: vincentsucdri@126.com。

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出版历程
- 收稿日期: 2014-07-27
- 发布日期: 2014-07-27

Measured deformation of a semi-circular foundation pit in Shanghai soft soils

1. Shanghai Urban Construction Design and Research Institute, Shanghai 200092, China;
2. Department of Civil Engineering,Shanghai Jiaotong University, Shanghai 200030, China

摘要

摘要: 通过对上海临港新城某半圆形基坑实测数据的分析,结合对半圆形基坑结构优势、变形特性的综述,探讨了半圆形基坑围护结构变形、地表沉降的一般规律。结果表明：该半圆形基坑围护结构的最大侧向位移为开挖深度的0.152%~0.636%,平均值为0.325%;围护结构侧向变形通常为深层凸鼓形,围护结构最大侧移点深度一般位于开挖面以下2~6 m;基坑周边最大地表沉降为开挖深度的0.587%,平均值为0.312%。在相同地质和施工条件下,和矩形基坑相比,半圆形基坑结构形式对控制变形有一定优势。
- 软土 /
- 半圆形 /
- 基坑 /
- 变形 /
- 沉降
Abstract: A semi-circular foundation pit of Lingang metro station in Shanghai soft soil deposits is monitored and analyzed. Combined with the summarization of characteristics and advantages of the semi-circular pit, the deformations due to excavation are discussed. The monitoring results show that the ratio of the maximum lateral displacement of the retaining structures to the excavation depth ranges from 0.152% to 0.636%,and the mean value is about 0.325%. The deformation of the retaining structures exhibits a clearly deep bulging profile as the excavation continues, and the maximum lateral displacement of the retaining structures usually appears between 2 m and 6 m below the excavation surface. The ratio of the maximum surface ground settlement to the excavation depth is 0~0.587%. Under the same geological and construction conditions, compared with the rectangle pit, the semi-circular pit has the advantages of displacement control.
- soft soil /
- semi-circle /
- excavation /
- deformation /
- settlement

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参考文献(6)

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