Effectiveness of horizontal drains in improving slope stability

A case study of landslide event in Putra Jaya Precinct 9, Malaysia

J. Ahmed, M. A. Ghazali, M. Mukhlisin, M. N. Alias, Mohd. Raihan Taha

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A landslide that occurred at 4:30am on 22 March 2007 in Precinct 9, Putrajaya, Malaysia buried 27 cars and forced the evacuation of about 1,200 people. In order to ensure that the residents could reoccupy their apartments in the shortest time possible, 40 numbers of horizontal drains measuring about 24 m in lengths were immediately installed to lower down the groundwater table. Soils investigation and instrumentation were conducted to obtain the geotechnical model and monitor the ground water level and ground movement. Due to the high variance of water discharge from the drains, geological studies supported by geophysical surveys were further conducted to help explain the phenomenon. It was observed that the groundwater level was lowered to a safe level, in terms of slope stability, within a few days after the horizontal drains were installed. Ground movement had also substantially ceased upon lowering of the ground water table. Geological studies concluded that the existence of highly fractured rock was the main reason for the very high yield of a few of the horizontal drains.

Original languageEnglish
Title of host publication5th Asia-Pacific Conference on Unsaturated Soils 2012
Pages625-630
Number of pages6
Volume2
Publication statusPublished - 2012
Event5th Asia-Pacific Conference on Unsaturated Soils 2012 - Pattaya
Duration: 29 Feb 20122 Mar 2012

Other

Other5th Asia-Pacific Conference on Unsaturated Soils 2012
CityPattaya
Period29/2/122/3/12

Fingerprint

landslides
slope stability
Malaysia
drain
water table
landslide
case studies
ground movement
groundwater
geophysical survey
instrumentation
automobile
water level
rocks
rock
soil
water

Keywords

  • Geophysical survey
  • Ground water table
  • Horizontal drains
  • Slope stability

ASJC Scopus subject areas

  • Soil Science

Cite this

Ahmed, J., Ghazali, M. A., Mukhlisin, M., Alias, M. N., & Taha, M. R. (2012). Effectiveness of horizontal drains in improving slope stability: A case study of landslide event in Putra Jaya Precinct 9, Malaysia. In 5th Asia-Pacific Conference on Unsaturated Soils 2012 (Vol. 2, pp. 625-630)

Effectiveness of horizontal drains in improving slope stability : A case study of landslide event in Putra Jaya Precinct 9, Malaysia. / Ahmed, J.; Ghazali, M. A.; Mukhlisin, M.; Alias, M. N.; Taha, Mohd. Raihan.

5th Asia-Pacific Conference on Unsaturated Soils 2012. Vol. 2 2012. p. 625-630.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ahmed, J, Ghazali, MA, Mukhlisin, M, Alias, MN & Taha, MR 2012, Effectiveness of horizontal drains in improving slope stability: A case study of landslide event in Putra Jaya Precinct 9, Malaysia. in 5th Asia-Pacific Conference on Unsaturated Soils 2012. vol. 2, pp. 625-630, 5th Asia-Pacific Conference on Unsaturated Soils 2012, Pattaya, 29/2/12.
Ahmed J, Ghazali MA, Mukhlisin M, Alias MN, Taha MR. Effectiveness of horizontal drains in improving slope stability: A case study of landslide event in Putra Jaya Precinct 9, Malaysia. In 5th Asia-Pacific Conference on Unsaturated Soils 2012. Vol. 2. 2012. p. 625-630
Ahmed, J. ; Ghazali, M. A. ; Mukhlisin, M. ; Alias, M. N. ; Taha, Mohd. Raihan. / Effectiveness of horizontal drains in improving slope stability : A case study of landslide event in Putra Jaya Precinct 9, Malaysia. 5th Asia-Pacific Conference on Unsaturated Soils 2012. Vol. 2 2012. pp. 625-630
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