Seismic Analysis in Stabilized Trench with Pile

Document Type : Original Article

Authors

1 Department of Civil Engineering, Islamic Azad University of Zanjan, Zanjan, Iran.

2 Department of Civil Engineering, University of Zanjan, Zanjan, Iran.

Abstract

Due to the loss of life and damage to surface and underground structures, stabilization of trenches in order to control and stabilize landslides is very important. In the current study, the effect of the implementation of the pile has been analyzed to increase the stability of the trench under the impact of the earthquake. Therefore, a trench with 45 angle which reinforced by the pile, was analyzed with variable parameters, including the diameter of the pile (D) that was with a 0.9m diameter and other pile with 1.5m diameter, the buried length of the pile (L) was 10m and 15m. The space between the piles (S) to each other was implemented by three sizes; 0.3m, 4.5m and 0.6m, and the implementation of the pile with five forms on the span of the trench was analyzed to study its different behavior under seismic conditions. The results showed that with increasing the diameter of the pile and the implementation of the pile, the horizontal displacement of the span of the trench reduces 25% to the normal state. In addition, with an increase in the length of the pile, the level of the subsidence is 24 to 30 percent lower than the normal state.

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  1. Kourkoulis R, Gelagoti F, Anastasopoulos I, Gazetas G. Slope stabilizing piles and pile-groups: parametric study and design insights. Journal of Geotechnical and Geoenvironmental Engineering. 2010;137(7):663-77.
  2. Ito T, Matsui T. Methods to estimate lateral force acting on stabilizing piles. Soils and foundations. 1975;15(4):43-59.
  3. Sharafi H, Sojoudi Y. Experimental and numerical study of pile-stabilized slopes under surface load conditions. International Journal of Civil Engineering. 2016;14(4):221-32.
  4. Briaud J-L, Lim Y. Tieback walls in sand: numerical simulation and design implications. Journal of  geotechnical  and  geoenvironmental  engineering.1999;125(2):101-10.
  5. El-Naiem MAA, Towfeek AR, El-Samea WHA. Numerical analysis of concrete solider pile with steel sheet pile lagging supporting system in sandy soil.
  6. Tiecheng S, Mingju Z, Qian Y. Modeling study on composite soil nailing for deep excavation [J]. Chinese Journal of Rock Mechanics and Engineering. 2004;15:019.
  7. Wang J, Xu Z, Wang W. Wall and ground movements due to deep excavations in Shanghai soft soils. Journal of Geotechnical and Geoenvironmental Engineering. 2009;136(7):985-94.
  8. Wei W, Cheng Y. Strength reduction analysis for slope reinforced with one row of piles. Computers and Geotechnics. 2009;36(7):1176-85.
  9. Ashour M, Ardalan H. Analysis of pile stabilized slopes based on soil–pile interaction. Computers and Geotechnics. 2012;39:85-97.
  10. Zhang G, Wang L. Simplified evaluation on the stability level of pile- reinforced slopes. Soils and Foundations. 2017;57(4):575-86.
  11. Martin G, Chen C-Y. Response of piles due to lateral slope movement. Computers & structures. 2005;83(8-9):588-98.
  12. Abdelaziz A, Hafez D, Hussein A. The effect of pile parameters on the factor of safety of piled-slopes using 3D numerical analysis. HBRC Journal. 2015.
  13. He Y, Hazarika H, Yasufuku N, Han Z. Evaluating the effect of slope angle on the distribution of the soil–pile pressure acting on stabilizing piles in sandy slopes. Computers and Geotechnics. 2015;69:153-65.
  14. Zhu M-X, Zhang Y, Gong W-M, Dai G-L. Discussion on “Evaluating the effect of slope angle on the distribution of the soil-pile pressure acting on stabilizing piles in sandy slopes”. Computers and Geotechnics. 2016(79):176- 81.
  15. Cundall P. FLAC 3D Manual: a computer program for fast Lagrangian analysis of continua (Version 4.0). Minneapolis, Minnesota, USA. 2008.