Determination of Terrain-Specific Restitution Coefficients and Rockfall Hazard Assessment in Urbanized Mountainous Areas of Nepal

Authors

  • Dhurba Tiwari 77D International, Kumarigal, Kathmandu, Nepal Author
  • Sunam Kumar Sharma Geotech Solutions International Pvt. Ltd., Dhobighat, Lalitpur, Nepal Author

Keywords:

GeoRock 2D, Rockfall, Restitution coefficient

Abstract

The primary aims of this study were to determine the restitution coefficient of the material and to simulate rockfall at the steep slope in Chaku Bazar. Initially, the normal and tangential restitution coefficients were calculated for 10 different rock boulders, varying in shape and composition using the Tracker Video analysis. The computed values for normal and tangential restitution coefficients were then used to simulate rockfall behavior using GeoRock 2D across four different sections, predicting rockfall trajectories and run-out distances. The normal restitution coefficient for vegetated rocky terrain was 0.34, while for solid rock it was 0.73. Likewise, the tangential restitution coefficient was 0.51 for grass-covered areas and 0.82 for rocky surfaces. After determining the restitution coefficients, the calculations revealed a maximum collision energy of 15000 kJ and a maximum bounce height of 30 meters at the bazar area.

References

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Published

2024-11-05

How to Cite

Determination of Terrain-Specific Restitution Coefficients and Rockfall Hazard Assessment in Urbanized Mountainous Areas of Nepal. (2024). Asian Journal of Engineering Geology, 1(Special Issue), 21-22. http://ajeg.nseg.org.np/index.php/ajeg/article/view/16