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GEO Report No. 91
Report No. : GEO Report No. 91

Report Title : Investigation of Some Selected Landslide Incidents in 1997 (Volume 5) (1999), 141 p.

Author : Halcrow Asia Partnership Ltd.

Abstract

This GEO Report consists of four Landslide Study Reports on the investigation of selected slope failures that occurred in 1997. The investigations were carried out by Halcrow Asia Partnership Ltd (HAP) for the Geotechnical Engineering Office as part of the 1997 Landslip Investigation Consultancy.

Section 1 of this report presents the findings of a detailed study of a landslide (GEO Incident No. ME 97/7/6) that occurred in the early hours of 3 July 1997 on a soil cut slope adjacent to Hong Tsuen Road, Sai Kung. Landslide debris blocked a two-lane highway. No fatalities or injuries were reported.

Section 2 of this report presents the findings of a detailed study of four landslides (reported in GEO Incident Report Nos. MW97/6/20 and MW97/6/30) which occurred on 4 June 1997 on cut slopes behind Nos. 1 to 5 Chung Shan Terrace, Lai Chi Kok. Debris from the landslides affected residential properties below the slopes. No fatalities or injuries were reported.

Section 3 of this report presents the findings of a detailed study of a landslide and a washout (GEO Incident Report No. MW97/7/24) that occurred above Ka Tin Court, Shatin on 2 July 1997. The landslide occurred on a partly-modified natural valley-side slope, that has a fill platform at the crest and a cut slope at the toe. The landslide debris partially blocked a minor river course in the valley. The washout occurred further down the river course, adjacent to the entrance of a drainage cascade that had become blocked with landslide debris transported by the river. The blockage caused debris and silty water to overspill onto an adjacent cut slope and the resulting washout into Ka Tin Court. The washout affected walkways adjacent to Ka Wing House, Ka Tin Court. No injuries or fatalities were reported.

Section 4 of this report presents the findings of a study of two failures (GEO Incident Report No. ME97/8/16), one on a cut slope and the other on a fill slope, at Li Po Chun United World College, Wu Kai Sha. The failures occurred sometime between 1 and 2 July 1997. Both failures were minor and deposited debris on open space, with no significant consequence.


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