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GEO Report No. 215
Report No. : GEO Report No. 215

Report Title : Detailed Study of the 20 August 2005 Landslide on Slope No. 11NE-A/C153 at Ping Ting Road, Ngau Chi Wan (2007), 69 p.

Author : T.M.F. Lau & K.K.S. Ho

Abstract

This report presents the findings of a review of a landslide (Incident No. 2005/08/0299) that occurred at the rock portion of a 47 m high soil/rock cut slope No. 11NE-A/C153 at Ping Ting Road, Ngau Chi Wan, at about 2:37 a.m. on 20 August 2005. The landslide involved the detachment of a total of about 36 m3 of rock blocks and soil, and the displacement of a rock wedge, about 12 m wide and 14 m high. Both lanes of Ping Ting Road were temporarily closed. No casualties were reported as a result of the landslide.

In the early morning of 13 September 2005, further instability of slope No. 11NE-A/C153 occurred at the location of the 20 August 2005 landslide. Another 10 m3 of rock blocks and soil detached and an unstable rock wedge displaced forward further. Both lanes of Ping Ting Road, together with the playground at the Buddhist Hung Sean Chau Memorial College on the opposite side of the road, were temporarily closed. No casualties were reported as a result of the landslide.


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