The Numerical Simulation Research of the Deformation Character for the Soft Clay Foundation in the Unloading Condition

Abstract:

Abstract: The numerical simulation of the deformation character in the effect of the unloading action for the surcharge preloading in the heap preloading treated foundation in the Sixin South Road in the New District in Wuhan is done through the finite element analysis software ABAQUS according to the engineering project ,and the following conclusions are gained:(1)on the surface of the foundation, the settlement at the center is the biggest, the settlement decreases with distance from the center of the surface, ,and at about 20m away from the center, the uplift is produced ;(2)after unloading, the resilience emerges in the places where the settlement was produced, and the uplift that was produced drops too;(3)the deformation on the axle of the foundation section at the end of the loading action and that at the end of the unloading action are similar to each other;(4) in the step loading-unloading condition, the deformation curves suit well with the loading-unloading curves.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 1736-1742
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.1736
• Online since: September 2011
• Authors: Bin Tang, Ren Wang, Hong Xing Wang
• Keywords: Engineering Example Analysis, Numerical Simulation, Soft Clay, Unloading Condition

References

[1] Chen Yongfu,Cao Mingbao.The loading-unloading deformation character for the soft clay in Shanghai area[J].Chinese Journal of Geotechnical Engineering,1990, 12(2)：9-18．

[2] Zhou Jian, Cai Jian.The unloading shear strength for the soil [J].Chinese Journal of Geotechnical Engineering, 2006, 28 (5) ：606-609．

[3] Zai Jinming,Zhang Yunsheng,Wang Xudong,Chang Yinsheng.Deformation and strength test research in the unloading condition for the clay[J].Chinese Journal of Geotechnical Engineering,2007, 29(9)：1409-1412．

[4] Qin Aifang,Liu Shaofeng,Hu Zhongxiong.Strength changing character for the soft clay in the pit foundation and the construction softy control in the pit foundation bottom[J].Underground Space,2003, 23(1)：40-44．

[5] Sun Jun, Wang Binjian.Finite element analysis of the underground structure [M].Shanghai Tongji University Press, 1988：67-73．

[6] Shao C．, Desai C．S．．Implementation of DSC Model and Application for Analysis of Filed Pile Tests under Cyclic Loading [J]．Int．J．Numer．Anal．Mech．Geomech, 2000, 24 (6) ：601-624. Figure 5 Contour of the vertical displacement at the end of the loading Figure 6 Contour of the vertical displacement at the end of the unloading Figure 7 Vertical displacement on the vertical axle at the end of the loading and the unloading action Figure 8 Deformation of the foundation surface at the end of the loading and he unloading action Figure 9 Settlement-time relationship curves of the nodes on the foundation surface from the finite element software Figure 10 Settlement-time relationship curves of the nodes on the foundation surface from engineering project

DOI: 10.7717/peerj.11797/fig-4