Techno Press
Techno Press

Geomechanics and Engineering   Volume 12, Number 6, June 2017, pages 1021-1046
Finite element analyses of the stability of a soil block reinforced by shear pins
Rithy Ouch, Boonchai Ukritchon, Thirapong Pipatpongsa and Mohammad Hossein Khosravi

Abstract     [Full Text]
    The assessment of slope stability is an essential task in geotechnical engineering. In this paper, a threedimensional (3D) finite element analysis (FEA) was employed to investigate the performance of different shear pin arrangements to increase the stability of a soil block resting on an inclined plane with a low-interface friction plane. In the numerical models, the soil block was modeled by volume elements with linear elastic perfectly plastic material in a drained condition, while the shear pins were modeled by volume elements with linear elastic material. Interface elements were used along the bedding plane (bedding interface element) and around the shear pins (shear pin interface element) to simulate the soil-structure interaction. Bedding interface elements were used to capture the shear sliding of the soil on the low-interface friction plane while shear pin interface elements were used to model the shear bonding of the soil around the pins. A failure analysis was performed by means of the gravity loading method. The results of the 3D FEA with the numerical models were compared to those with the physical models for all cases. The effects of the number of shear pins, the shear pin locations, the different shear pin arrangements, the thickness and the width of the soil block and the associated failure mechanisms were discussed.
Key Words
    slope stability; shear pin; numerical model; interface element
(1) Rithy Ouch, Boonchai Ukritchon:
Geotechnical Research Unit, Department of Civil Engineering, Chulalongkorn University, Bangkok, Thailand;
(2) Thirapong Pipatpongsa:
Department of Urban Management, Kyoto University, Katsura Campus, Nishikyo-ku, Kyoto, 615-8540, Japan;
(3) Mohammad Hossein Khosravi:
School of Mining Engineering, College of Engineering, University of Tehran, Tehran, Iran.

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