Kegagalan cerun di bukit antarabangsa, ampang, selangor dan hubungannya dengan sifat fizik tanah

Translated title of the contribution: Slope failure at bukit antarabangsa, ampang, selangor, and its relationship to physical soil properties

Muhammad Barzani Gasim, Sahibin @ Sahibini Abd Rahim, Mohd. Ekhwan Toriman, Dan Diyana Ishnin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Slope failure which occurred on 6 December 2008 at Bukit Antarabangsa, Ampang Selangor has caused mortalities and loss of properties whereas more than 20 houses were flattened. Prior to slope failure, it was heavily downpoured for a few hours that increased the soil saturation and plasticity properties. A total of 10 soil samples were randomly taken from stable and unstable slopes to determine physical soil properties, infiltration rate and their relationship to rainfall pattern. Soils were analyzed in terms of their physical properties; five years (2005-2009) of daily rainfalls were analyzed to determine their relationship to infiltration rate at each sampling station. Infiltration rate is determined by using infiltrometer double ring. Analysis of physical soils properties shows that soil texture was dominated by sandy soil with relatively high percentage of sand. Values of clay dispersion coefficient were relatively stable to very stable from 0.013% to 11.85% and organic content from 1.38% to 2.74%. Range of porosity was from 50.12% to 62.31%, while the average levels of hydraulic conductivity was from level 2 to 5 or relatively slow to fast. Percentage of soil aggregate stability was from 5.12% to 48.42% and this value indicates that relative strength of soil mechanical pressure is inversely proportional to the percentage of water content. Soil plasticity value was high to very high but characterized by inactive colloids. Distribution of monthly rainfall was from 38 mm to 427mm. The infiltration rate during sampling time was from 3.0 cm/hr to 7.0 cm/hr; but it was expected from 10.94cm/hr to 915.05 cm/hr during slope failures. Overall, it was interpreted that physical soil properties was closely interrelated with slope stability, structure of sandy soil will enhanced soil porosity stage and enhance the infiltration process during heavy rainfall, and finally triggering of slope failure.

Original languageUndefined/Unknown
Pages (from-to)138-149
Number of pages12
JournalMalaysian Journal of Analytical Sciences
Volume15
Issue number2
Publication statusPublished - 2011

Fingerprint

Soils
Infiltration
Rain
Plasticity
Porosity
Sampling
Slope stability
Hydraulic conductivity
Colloids
Water content
Sand
Physical properties
Textures

Keywords

  • Bukit antarabangsa
  • Infiltration rate
  • Sandy soil
  • Slope failure

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Kegagalan cerun di bukit antarabangsa, ampang, selangor dan hubungannya dengan sifat fizik tanah. / Gasim, Muhammad Barzani; Abd Rahim, Sahibin @ Sahibini; Toriman, Mohd. Ekhwan; Ishnin, Dan Diyana.

In: Malaysian Journal of Analytical Sciences, Vol. 15, No. 2, 2011, p. 138-149.

Research output: Contribution to journalArticle

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title = "Kegagalan cerun di bukit antarabangsa, ampang, selangor dan hubungannya dengan sifat fizik tanah",
abstract = "Slope failure which occurred on 6 December 2008 at Bukit Antarabangsa, Ampang Selangor has caused mortalities and loss of properties whereas more than 20 houses were flattened. Prior to slope failure, it was heavily downpoured for a few hours that increased the soil saturation and plasticity properties. A total of 10 soil samples were randomly taken from stable and unstable slopes to determine physical soil properties, infiltration rate and their relationship to rainfall pattern. Soils were analyzed in terms of their physical properties; five years (2005-2009) of daily rainfalls were analyzed to determine their relationship to infiltration rate at each sampling station. Infiltration rate is determined by using infiltrometer double ring. Analysis of physical soils properties shows that soil texture was dominated by sandy soil with relatively high percentage of sand. Values of clay dispersion coefficient were relatively stable to very stable from 0.013{\%} to 11.85{\%} and organic content from 1.38{\%} to 2.74{\%}. Range of porosity was from 50.12{\%} to 62.31{\%}, while the average levels of hydraulic conductivity was from level 2 to 5 or relatively slow to fast. Percentage of soil aggregate stability was from 5.12{\%} to 48.42{\%} and this value indicates that relative strength of soil mechanical pressure is inversely proportional to the percentage of water content. Soil plasticity value was high to very high but characterized by inactive colloids. Distribution of monthly rainfall was from 38 mm to 427mm. The infiltration rate during sampling time was from 3.0 cm/hr to 7.0 cm/hr; but it was expected from 10.94cm/hr to 915.05 cm/hr during slope failures. Overall, it was interpreted that physical soil properties was closely interrelated with slope stability, structure of sandy soil will enhanced soil porosity stage and enhance the infiltration process during heavy rainfall, and finally triggering of slope failure.",
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AB - Slope failure which occurred on 6 December 2008 at Bukit Antarabangsa, Ampang Selangor has caused mortalities and loss of properties whereas more than 20 houses were flattened. Prior to slope failure, it was heavily downpoured for a few hours that increased the soil saturation and plasticity properties. A total of 10 soil samples were randomly taken from stable and unstable slopes to determine physical soil properties, infiltration rate and their relationship to rainfall pattern. Soils were analyzed in terms of their physical properties; five years (2005-2009) of daily rainfalls were analyzed to determine their relationship to infiltration rate at each sampling station. Infiltration rate is determined by using infiltrometer double ring. Analysis of physical soils properties shows that soil texture was dominated by sandy soil with relatively high percentage of sand. Values of clay dispersion coefficient were relatively stable to very stable from 0.013% to 11.85% and organic content from 1.38% to 2.74%. Range of porosity was from 50.12% to 62.31%, while the average levels of hydraulic conductivity was from level 2 to 5 or relatively slow to fast. Percentage of soil aggregate stability was from 5.12% to 48.42% and this value indicates that relative strength of soil mechanical pressure is inversely proportional to the percentage of water content. Soil plasticity value was high to very high but characterized by inactive colloids. Distribution of monthly rainfall was from 38 mm to 427mm. The infiltration rate during sampling time was from 3.0 cm/hr to 7.0 cm/hr; but it was expected from 10.94cm/hr to 915.05 cm/hr during slope failures. Overall, it was interpreted that physical soil properties was closely interrelated with slope stability, structure of sandy soil will enhanced soil porosity stage and enhance the infiltration process during heavy rainfall, and finally triggering of slope failure.

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