Pencirian Sifat Kimia Bahan Tanah pada Cerun Gagal di Sepanjang Jalan Ranau-Tambunan, Sabah, Malaysia

Translated title of the contribution: Chemical properties characterization of failed slopes along the ranau-tambunan road, Sabah, Malaysia

Noran Nabilla Nor Azlan, Norbert Simon, Azimah Hussin, Rodeano Roslee, Khai Ern Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The study area which is located in the mountainous region of Sabah west coast is often associated with landslide and slope failure. In terms of geology, the area along the Ranau-Tambunan road (RTM) is consist of arenaceous sedimentary rocks in the Crocker Formation and weathered argiliceous meta-sedimentary rocks in the Trusmadi Formation, as well as deposit of quarternary alluvium in some parts of the study area. Characterization of chemical properties of failed materials in the tropical region, especially in the study area is seldom conducted. This characterization is important because it is not only the physical properties that influence landslide occurrences. Therefore, this study focused on the characterization of chemical characteristic and clay mineralogy on failed slope material in the study area. In order to achieve the objectives of this study, 12 soil samples from failed slopes that were categorized as grade VI in the weathering grade were tested. The inventory analysis on failed slopes showed that there were 10 failed soil slopes (T) and 8 distinctive failed slopes (TB) with 3 failed slopes classified as high volume (>500 m3), 7 moderate volume (50-500 m3) and 2 small volume (10-50 m3). The chemical analysis conducted showed low to moderate organic content (BOT) (3.75%-7.23%) and pH from highly acidic to low alkaline for the failed materials. The XRD analysis showed that the clay compositions were kaolinite, illite and several other minerals such as monmorillonite, halosite, dicktite and vermiculite. The non-clay mineral compositions were quartz and muscovite. The result showed that there is a significant association between chemical characteristics and soil mineralogy in terms of chemical changes, porewater relationship and soil bonding in clay forming minerals that induce slope failure. Therefore, construction and management of slope should not only taking into account the physical aspect and soil engineering of the soil slope, but also the chemical characteristics especially that involve weathered rocks so that any failure on slope cut can be managed appropriately.

Original languageMalay
Pages (from-to)867-877
Number of pages11
JournalSains Malaysiana
Volume46
Issue number6
DOIs
Publication statusPublished - 1 Jun 2017

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chemical property
road
slope failure
soil
clay
sedimentary rock
landslide
mineral
vermiculite
tropical region
muscovite
illite
chemical analysis
alluvial deposit
kaolinite
porewater
mineralogy
weathering
physical property
X-ray diffraction

ASJC Scopus subject areas

  • General

Cite this

Pencirian Sifat Kimia Bahan Tanah pada Cerun Gagal di Sepanjang Jalan Ranau-Tambunan, Sabah, Malaysia. / Azlan, Noran Nabilla Nor; Simon, Norbert; Hussin, Azimah; Roslee, Rodeano; Lee, Khai Ern.

In: Sains Malaysiana, Vol. 46, No. 6, 01.06.2017, p. 867-877.

Research output: Contribution to journalArticle

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abstract = "The study area which is located in the mountainous region of Sabah west coast is often associated with landslide and slope failure. In terms of geology, the area along the Ranau-Tambunan road (RTM) is consist of arenaceous sedimentary rocks in the Crocker Formation and weathered argiliceous meta-sedimentary rocks in the Trusmadi Formation, as well as deposit of quarternary alluvium in some parts of the study area. Characterization of chemical properties of failed materials in the tropical region, especially in the study area is seldom conducted. This characterization is important because it is not only the physical properties that influence landslide occurrences. Therefore, this study focused on the characterization of chemical characteristic and clay mineralogy on failed slope material in the study area. In order to achieve the objectives of this study, 12 soil samples from failed slopes that were categorized as grade VI in the weathering grade were tested. The inventory analysis on failed slopes showed that there were 10 failed soil slopes (T) and 8 distinctive failed slopes (TB) with 3 failed slopes classified as high volume (>500 m3), 7 moderate volume (50-500 m3) and 2 small volume (10-50 m3). The chemical analysis conducted showed low to moderate organic content (BOT) (3.75{\%}-7.23{\%}) and pH from highly acidic to low alkaline for the failed materials. The XRD analysis showed that the clay compositions were kaolinite, illite and several other minerals such as monmorillonite, halosite, dicktite and vermiculite. The non-clay mineral compositions were quartz and muscovite. The result showed that there is a significant association between chemical characteristics and soil mineralogy in terms of chemical changes, porewater relationship and soil bonding in clay forming minerals that induce slope failure. Therefore, construction and management of slope should not only taking into account the physical aspect and soil engineering of the soil slope, but also the chemical characteristics especially that involve weathered rocks so that any failure on slope cut can be managed appropriately.",
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AB - The study area which is located in the mountainous region of Sabah west coast is often associated with landslide and slope failure. In terms of geology, the area along the Ranau-Tambunan road (RTM) is consist of arenaceous sedimentary rocks in the Crocker Formation and weathered argiliceous meta-sedimentary rocks in the Trusmadi Formation, as well as deposit of quarternary alluvium in some parts of the study area. Characterization of chemical properties of failed materials in the tropical region, especially in the study area is seldom conducted. This characterization is important because it is not only the physical properties that influence landslide occurrences. Therefore, this study focused on the characterization of chemical characteristic and clay mineralogy on failed slope material in the study area. In order to achieve the objectives of this study, 12 soil samples from failed slopes that were categorized as grade VI in the weathering grade were tested. The inventory analysis on failed slopes showed that there were 10 failed soil slopes (T) and 8 distinctive failed slopes (TB) with 3 failed slopes classified as high volume (>500 m3), 7 moderate volume (50-500 m3) and 2 small volume (10-50 m3). The chemical analysis conducted showed low to moderate organic content (BOT) (3.75%-7.23%) and pH from highly acidic to low alkaline for the failed materials. The XRD analysis showed that the clay compositions were kaolinite, illite and several other minerals such as monmorillonite, halosite, dicktite and vermiculite. The non-clay mineral compositions were quartz and muscovite. The result showed that there is a significant association between chemical characteristics and soil mineralogy in terms of chemical changes, porewater relationship and soil bonding in clay forming minerals that induce slope failure. Therefore, construction and management of slope should not only taking into account the physical aspect and soil engineering of the soil slope, but also the chemical characteristics especially that involve weathered rocks so that any failure on slope cut can be managed appropriately.

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KW - Weathering

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