Report No. : GEO Report No. 360

Report Title : Design of Nail Head for Use of Soil Nails in Mitigation of Open Hillslope Landslides (2022), 26 p.

Author : V.S.F. Kong, R.C.H. Koo & D.S. Chang

Abstract

This Technical Note presents a review on the design of nail head for use of soil nails in mitigation of open hillslope landslides based on Geoguide 7 and GEO Report No. 175. Geoguide 7 provides recommendation on sizing soil-nail head for slopes steeper than 45 from numerical modelling results presented in GEO Report No. 175. This study extends the numerical modelling for the design of soil-nail head on gentle slopes, which is particularly relevant for the use of soil nails in mitigation of open hillslope landslides on natural terrains in Hong Kong.

Based on the findings of this study, recommendations pertaining to the sizing of soil-nail head for use of soil nails in gentle slopes, in particular for use of soil nails in mitigation of open hillslope landslides are made for rational and cost-effective design solutions, together with enhanced sustainable measures against shallow landslides and surface erosion.

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