Report No. : GEO Report No. 276

Report Title : Detailed Study of the 7 June 2008 Landslide on the Natural Hillside behind Chow Yei Ching Building at the University Of Hong Kong, Pok Fu Lam (2013), 116 p.

Author : Maunsell Geotechnical Services Limited

Abstract

This report presents the findings of a detailed study of a landslide incident (Incident No. 2008/06/0193) that occurred on a natural hillside behind Chow Yei Ching Building at the University of Hong Kong, Pok Fu Lam. The landslide was reported on the morning of 7 June 2008 during which the Landslip Warning and the Black Rainstorm Warning were in force. The landslide involved a total displaced volume of about 2,740 m³ and comprised a larger primary and a smaller secondary source area. The detached material travelled a maximum distance of about 210 m down the hillside eventually coming to rest adjacent to the Chow Yei Ching Building. A 200 mm diameter fresh water main, associated with a paved footpath traversing the primary source area, was severed, and a temporary footbridge adjacent to the Chow Yei Ching Building was destroyed. Some outwash debris passed into the lower floors and car park of the Chow Yei Ching Building before entering Pok Fu Lam Road. No casualties were reported as a result of the landslide.

The key objectives of the study were to document the facts about the landslide, present relevant background information and establish the probable causes of the landslide. The scope of the study comprised desk study, site reconnaissance, field mapping, ground investigation and laboratory testing, together with theoretical analyses. Recommendations for follow-up actions are presented separately.

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