Analysis of Braced Excavation with Pit-in-Pit Based on Orthogonal Experiment

Abstract:

In order to study the supporting structure under different distances between inner pit-in-pit and foundation pit, width and depth of pit-in-pit and general excavation depth of external foundation pit, PLAXIS is adopted to simulate the whole process of pit-in-pit excavation in a foundation pit of Shanghai. The factors which influence wall deflection are analyzed using orthogonal experimental design software. The results show that the factors which influence deformation of pit-in-pit and supporting structure of foundation pit are sorted with range value or sensitivity descending: depth of pit-in-pit, location of pit-in-pit, general excavation depth of external foundation pit, and width of pit-in-pit. Depth and location of pit-in-pit are the most two significant factors, and they have the strongest interactions.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 4549-4553
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.4549
• Online since: July 2011
• Authors: Tian Ping Qian, Xiao Nan Gong, Ying Li
• Keywords: Braced Excavation, Orthogonal Experimental Design, Pit-in-Pit, Supporting Structure, Wall Deflection

References

[1] Xiaonan Gong: Foundation Treatment Vol. 6(1995), p.42–43, in Chinese.

[2] Xiaonan Gong: China Civil Engineering Journal Vol. 38(2005), p.99–102, in Chinese.

[3] Lijian Jin, Zhigang Wang: Building Construction Vol. 27(2005), p.5–7, in Chinese.

[4] Mingbing Wu, Dafeng Lin, Yiming Dai, et al.: Chinese Journal of Geotechnical Engineering Vol. 28(2006), p.1569–1572, in Chinese.

[5] Goodman R E, Taylor R L, Brekke T L: Journal of Soil Mechanic and Foundation Engineering Division Vol. 99(1968), p.637–660.

[6] Mohr O: Zeitschrift des Vereins Deutscher Ingenieure Vol. 44(1900), p.1524–1530.

[7] Mohr O: Zivilingenieur Vol. (1882), p.113–142.

[8] Xingwang Liu, Shiming Wu: Chinese Journal of Geotechnical Engineering Vol. 21(1999), p.456–460, in Chinese.