Scholarlink

<p>A 35&#xa0;m high geosynthetic reinforced soil (GRS) wall with geocell fascia, located in the north-eastern Himalayan foothills, failed under a minor earthquake event. Such tall flexible GRS wall are considered long-period structures and are highly susceptible to low frequency vibrations. To investigate the seismic response of the GRS wall, this study utilizes a set of ground motions recorded in the northeast region of India. Corresponding peak ground accelerations (PGA) are used for pseudo-static stability assessment. Two-dimensional finite element models are developed to analyse the interaction between geocell fascia, geogrids and anchors with the in-situ anchored rock slope. The responses concerning the acceleration amplification and peak lateral displacement exhibited by the structure are examined in addition to the axial force developed in the reinforcement and reinforcement connection loads with the retained rock mass. The investigation of stress profiles and strain contours are in agreement with the failure noted in the field. The study exhibits that geogrid reinforcements from the upper portion of the bottom tier and all of the reinforcements from the middle tier are mobilized to their capacity, thereby leading to the collapse of the GRS structure. The findings from this study will further assist in the improvement and retrofitting of similar reinforced earth structures in seismic zones.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Seismic Response of Large-Height Geocell-Fascia Multi-Tiered Geosynthetic Reinforced Soil (GRS) Wall: A Forensic Investigation of a Hillslope Reclamation Project

  • 期刊论文

  • 发表日期：

    2025年12月24日

查看全文
  • S. Sureka,
  • Mihretab Madamo,
  • Arindam Dey

摘要

A 35 m high geosynthetic reinforced soil (GRS) wall with geocell fascia, located in the north-eastern Himalayan foothills, failed under a minor earthquake event. Such tall flexible GRS wall are considered long-period structures and are highly susceptible to low frequency vibrations. To investigate the seismic response of the GRS wall, this study utilizes a set of ground motions recorded in the northeast region of India. Corresponding peak ground accelerations (PGA) are used for pseudo-static stability assessment. Two-dimensional finite element models are developed to analyse the interaction between geocell fascia, geogrids and anchors with the in-situ anchored rock slope. The responses concerning the acceleration amplification and peak lateral displacement exhibited by the structure are examined in addition to the axial force developed in the reinforcement and reinforcement connection loads with the retained rock mass. The investigation of stress profiles and strain contours are in agreement with the failure noted in the field. The study exhibits that geogrid reinforcements from the upper portion of the bottom tier and all of the reinforcements from the middle tier are mobilized to their capacity, thereby leading to the collapse of the GRS structure. The findings from this study will further assist in the improvement and retrofitting of similar reinforced earth structures in seismic zones.