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Behavior Analysis of Rockfall Barrier with Spring Connections for Prevention of Cut-slope Disaster

  • Crisisonomy
  • Abbr : KRCEM
  • 2015, 11(3), pp.247-260
  • Publisher : Crisis and Emergency Management: Theory and Praxis
  • Research Area : Social Science > Public Policy > Public Policy in general

Sanghoon Han 1,  Hong, Kee Nam 1

1충북대학교

Accredited

ABSTRACT

Rockfall barrier, which has been installed to prevent rockfall from cut slopes, is one of the most common rockfall protection measures. The capability of the rockfall barrier can be defined as sum of the energy absorption capability of wire mesh, steel support, and wire rope. The typical rockfall barrier absorbs energy of moving rock with these three parts. However, its parts should be changed with new ones although it is partially damaged by rockfall. Therefore, the aim of this study is to propose improved rockfall barriers with independent behavior by using spring-connections between wire rope and H-beam support. The size of H-beam support and spring stiffness should be preferentially determined for realizing the improved rockfall barrier system. This study used FEM analysis method to develope the spring-connections rockfall barriers against rockfall with impact energy 90 kJ. From FEM analysis results, it was confirmed that both road direction displacement and wire rope internal force of rockfall barriers with spring-connections was decreased. However, further study is required for various impact velocities and angles to evaluate the penetration and bounce of falling rocks.

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