The Bad Effects of Foundation Pit Heave on Foundation Piles

Abstract:

Deep excavations release stresses in the earth and redistribute these stresses causing deformation. The pressure loss due to excavation may result in a base instability, where the soil flow beneath the sheeting into the excavation, producing a rise in the base elevation commonly termed as heave. The heave can lead the foundation piles casted before excavation to floating and being in tension, and even induce the tensile failure of pile in severe case. The characters of foundation piles in different excavation conditions, different location have been analyzed by a case study. The calculation results show that the deeper excavation, the larger vertical force acted on the foundation pile and the heave could induce the tensile failure of the foundation piles. So it is recommended that the tensile capacity of the foundation piles should be verified when the excavation is very deep.

• Periodical: Advanced Materials Research (Volumes 261-263)
• Pages: 1225-1228
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.261-263.1225
• Online since: May 2011
• Authors: Shi Lun Feng, Jie Liu, Jun Li, Pu Lin Li, Yong Han
• Keywords: Excavation, Foundation Pile, Heave

References

[1] Wong C. K.: Guide to Trench Excavations (Utilities Technical Liaison Committee Highways Department and Geotechnical Engineering Office Civil engineering department the government of the Hong Kong special administrative region, Hong Kong 2003)

DOI: 10.18057/ijasc.2007.3.2.3

[2] Yeqing Tang, Qimin Li and Jiangyu Cui: Analysis and Treatment of Deep Excavation Failure (China Architecture and Building Press, Beijing 1999)

[3] Qin S Q, Wan L H, Tang T P, et al.: Deep Foundation Pit Optimized Design (Earthquake Publishing House, Beijing 1998)

[4] Ou, C. Y., Chiou, D. C. and Wu, T. S.: Journal of Geotechnical Engineering, ASCE Vol. 122 (1996), pp.337-345

[5] Clough, G. W. and O'Rourke, T. D., In: Design and Performance of Earth Retaining Structure, ASCE (1990), pp.439-470

[6] Mana, A. I. and Clough, G. W.: Journal of the Geotechnical Engineering Division, ASCE Vol.107 (1981), pp.759-777

[7] Huiwu Chao, Yuou Chang and Ningchien Tung: Journal of Marine Science and Technology, Vol. 18 (2010), pp.1-11

[8] Gang Zheng, Shaowei Wei, Shunhua Xu and Lu An: Chinese Journal of Geotechnical Engineering Vol.30 (2008), pp.663-668

[9] Feng Xu, Jianhua Wei and Chao Wu: Chinese Journal of Underground Space and Engineering Vol.5( 2009), pp.1503-1517

[10] Hong Lu and Xiaofang Li: Journal of Kunming University of Science and Technology Vol. 31( 2006), pp.56-60