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Advances in Materials Science and Engineering
Volume 2016 (2016), Article ID 1570983, 16 pages
Research Article

Stability of Slopes Reinforced with Truncated Piles

1Faculty of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, China
2State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing, China

Received 10 August 2016; Revised 5 November 2016; Accepted 16 November 2016

Academic Editor: Hossein Moayedi

Copyright © 2016 Shu-Wei Sun et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Piles are extensively used as a means of slope stabilization. A novel engineering technique of truncated piles that are unlike traditional piles is introduced in this paper. A simplified numerical method is proposed to analyze the stability of slopes stabilized with truncated piles based on the shear strength reduction method. The influential factors, which include pile diameter, pile spacing, depth of truncation, and existence of a weak layer, are systematically investigated from a practical point of view. The results show that an optimum ratio exists between the depth of truncation and the pile length above a slip surface, below which truncating behavior has no influence on the piled slope stability. This optimum ratio is bigger for slopes stabilized with more flexible piles and piles with larger spacing. Besides, truncated piles are more suitable for slopes with a thin weak layer than homogenous slopes. In practical engineering, the piles could be truncated reasonably while ensuring the reinforcement effect. The truncated part of piles can be filled with the surrounding soil and compacted to reduce costs by using fewer materials.