Study on arching effect in the embankment over pile - reinforced soft soil
- Organ:1 Falculty of Civil Engineering, Hanoi University of Mining and Geology, Vietnam
2 Dao Phuc Lam, Falculty of Civil Engineering, University of Transport Technology, Hanoi, Vietnam
3 Falculty of Oil and Gas, Hanoi University of Mining and Geology, Hanoi, Vietnam
- Keywords: Arching effect,Embankment,Pile,Soft soil,Stress
- Received: 16th-Oct-2020
- Accepted: 24th-Nov-2020
- Available online: 31st-Dec-2020
- Field: Civil Engineering
The paper employes 3D numerical modeling to analyze the soil arching mechanism within embankment by FLAC3D code, based on the finite difference method (FDM). To consider the pile group effect, the 3D mesh of four pile has been created. Related to the constitutive models, the embankment is used Mohr - Coulomb model, the soft soil is represented by modified Cam - clay model, and footing and piles are employed by elasticity model. The numerical results focus on the soil arching phenomena in terms of stress distribution on piles and soft soil, the stress concentration ratio and the stress reduction ratio. Additionally, the axial force along pile and the settlements of embankment, soft soil and pile are studied.
. Han, J., Gabr, M., (2002). Numerical Analysis of Geosynthetic - Reinforced and Pile - Supported Earth Platforms over Soft Soil. Journal of Geotechnical and Geoenvironmental Engineering, 128, 44 - 53.
. Hewlett W. J., Randolph, M. F., (1988). Analysis of piled embankments. Ground Engineering, 21(3): 12 - 18.
. Jenck, O., Dias, D., Kastner, R., (2007). Two dimensional physical and numerical modeling of a pile - supported earth platform over soft soil. Journal of Geotechnical and Geoenvironmental Engineering, 133, 295 - 305.
. Pham, V. H., Brianson, L., Dias, D., Racinais, J., (2019). Investigation of behavior of footing over rigid inclusion - reinforced soft soil: Experimental and numerical approaches. Canadian Geotechnical Journal, 2019, 56(12): 1940 - 1952.
. Terzaghi, K., (1943). Theoretical Soil Mechanics.John Wiley and Sons, New York (1943).
. Van Eekelen, S. J. M., Bezuijen, A., Van Tol, A. F., (2013). An analytical model for arching in piled embankments. Geotextiles and Geomembranes, 39, pp. 78 - 102.
. Van Eekelen, S. J. M., Bezuijen, A., Van Tol, A. F., (2015). Validation of analytical models for the design of basal reinforced piled embankments. Geotextiles and Geomembranes, 43(1), 56 - 81.