JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2014, Vol. 31 ›› Issue (3): 142-146.DOI: 10.3969/j.issn.1001-5485.2014.03.025

• Engineering Application • Previous Articles    

Stability Analysis and Design of a Filled Subgrade in Complicated Terrain

JIANG Kun1, 2, XU Chao1, 2   

  1. 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;2. Department of Geotechnical Engineering College of Civil Engineering, Tongji University, Shanghai 200092, China
  • Received:2013-11-18 Revised:2014-03-07 Online:2014-03-07 Published:2014-03-07

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Abstract: As an important technical innovation, geogrid reinforced embankment is of great significance to improving highway quality, saving land occupation, and protecting eco-environment. The stability of geogrid-reinforced high-filled subgrade of an expressway in mountainous area was analyzed using simplified Bishop method and wedge method. One-way HDPE geogrid with an ultimate tensile strength of 90kN/m was selected as reinforcement material for the high slope (36m) of the subgrade. The minimum safety factor K was 1.32 by simplified Bishop method, and was 1.45 by wedge method. Results indicate that geogrid reinforcement could improve the stability of high-filled subgrade in complicated terrain so that the safety factor meets the requirement of standards. Meanwhile, the rational adjustment of reinforcement layout according to the characteristics of specific project is recommended to enhance the reliability of high-filled subgrade.

Key words: filled subgrade, geogrid reinforced soil, stability analysis, complicated terrain

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