FOUNDATION PIT SUPPORT DESIGN OF NANJING DEJI PLAZA(PHASE 2)IN DENSE URBAN AND ADJACENT TO SUBWAY TUNNEL

FANG Peng; LIAO Qiulin; XU Yanyan

doi:10.13544/j.cnki.jeg.2015.01.022

Volume 23 Issue 1

Feb. 2015

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FANG Peng, LIAO Qiulin, XU Yanyan. 2015: FOUNDATION PIT SUPPORT DESIGN OF NANJING DEJI PLAZA(PHASE 2)IN DENSE URBAN AND ADJACENT TO SUBWAY TUNNEL. JOURNAL OF ENGINEERING GEOLOGY, 23(1): 155-160. doi: 10.13544/j.cnki.jeg.2015.01.022

Citation:

FANG Peng, LIAO Qiulin, XU Yanyan. 2015: FOUNDATION PIT SUPPORT DESIGN OF NANJING DEJI PLAZA(PHASE 2)IN DENSE URBAN AND ADJACENT TO SUBWAY TUNNEL. JOURNAL OF ENGINEERING GEOLOGY, 23(1): 155-160. doi: 10.13544/j.cnki.jeg.2015.01.022

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FOUNDATION PIT SUPPORT DESIGN OF NANJING DEJI PLAZA(PHASE 2)IN DENSE URBAN AND ADJACENT TO SUBWAY TUNNEL

doi: 10.13544/j.cnki.jeg.2015.01.022

1.
Institute of Architectural Engineering, Shenyang University of Technology, Shenyang 110870;
2.
Engineering Contract Department, Beijing Urban Construction Group Co., Ltd., Beijing 100088;
3.
Chongqing 136 Geological Team, Chongqing 401147

Received Date: 2014-11-02
Rev Recd Date: 2014-12-25
Publish Date: 2015-02-25

Abstract

Abstract

The Nanjing Deji Plaza(Phase 2)project is located at the center of Nanjing. Excavation depths of main building and attached building are 21.50m and 19.70m respectively. The excavation depth of the foundation pit is deep. The pit area is huge. This paper analyzes the project structure, engineering geological conditions, hydrogeology conditions, surrounding environment and especially protection of subway tunnel. Pit support structure adopts underground diaphragm wall with two walls joining together. The attached building is constructed with top-down method. The main building is constructed with down-top method. This paper has put forward the protection measures to subway tunnel. In addition, this paper uses the general finite element analysis software to calculate the influence to subway tunnel by foundation pit excavation. The results show that this project has little impact on surrounding environment using top-down method, and meets the requirement of tunnel deformation with metro operation. This paper has a certain guiding significance for the projects with top-down method.
- Foundation pit,
- Top-down method,
- Finite element calculation,
- Support design,
- Engineering geological condition

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References(1)

References

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