The effects of broadleaf carpet grasses (axonopus compressus) on shallow slope stability

Shallow landslide is the slope failure phenomena that is a frequently occur geotechnical problem in tropical rainforest region such as Malaysia. For grass where the fine root distribution with depth is consistent and easily defined, the fine root network play the role important as geosynthetic mesh...

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Main Author:	Gey, Eng Keat
Format:	Thesis
Published:	2013
Subjects:	TA Engineering (General) Civil engineering (General)
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id	my-utm-ep.42227
record_format	uketd_dc
spelling	my-utm-ep.422272020-08-19T07:01:40Z The effects of broadleaf carpet grasses (axonopus compressus) on shallow slope stability 2013 Gey, Eng Keat TA Engineering (General). Civil engineering (General) Shallow landslide is the slope failure phenomena that is a frequently occur geotechnical problem in tropical rainforest region such as Malaysia. For grass where the fine root distribution with depth is consistent and easily defined, the fine root network play the role important as geosynthetic mesh by providing apparent enhanced cohesion that increase the strength of the soil. This study is to evaluate the effects of broadleaf carpet grass on shallow slope stability in terms of factor of safety (FOS). A slope geometry is drawn up and fed into the Microsoft Excel based SLIP4EX program for stability calculation. The additional parameters from grass effect is included in the analysis. This study can be concluded that broadleaf carpet grasses provided additional effective cohesion c?v of 1.43kPa to soil strength, and root reinforcement 0.297kN/m2 on slip surface. For case study, thee effects of carpet grass added 29.56% to FOS at 0.3 m depth slip plane. For parametric study of slope angles, the steepest slope of 1V:1H shows the carpet grasses added 29.53%. to FOS. Results of FOS also show that shallow slope stability is sensitive to effective cohesion c?, while internal angle of friction ?? has little effect on it. Bare soils results show that shallow slope failure prone to occur when the slope has effective cohesion c? less than 2.40 kPa in slope angle of 1V:1H. For the same slope after the inclusion of grass, shallow slope failure prone to occur only when the slope has effective cohesion c? less than 0.56 kPa. 2013 Thesis http://eprints.utm.my/id/eprint/42227/ http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:78878 masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Gey, Eng Keat The effects of broadleaf carpet grasses (axonopus compressus) on shallow slope stability
description	Shallow landslide is the slope failure phenomena that is a frequently occur geotechnical problem in tropical rainforest region such as Malaysia. For grass where the fine root distribution with depth is consistent and easily defined, the fine root network play the role important as geosynthetic mesh by providing apparent enhanced cohesion that increase the strength of the soil. This study is to evaluate the effects of broadleaf carpet grass on shallow slope stability in terms of factor of safety (FOS). A slope geometry is drawn up and fed into the Microsoft Excel based SLIP4EX program for stability calculation. The additional parameters from grass effect is included in the analysis. This study can be concluded that broadleaf carpet grasses provided additional effective cohesion c?v of 1.43kPa to soil strength, and root reinforcement 0.297kN/m2 on slip surface. For case study, thee effects of carpet grass added 29.56% to FOS at 0.3 m depth slip plane. For parametric study of slope angles, the steepest slope of 1V:1H shows the carpet grasses added 29.53%. to FOS. Results of FOS also show that shallow slope stability is sensitive to effective cohesion c?, while internal angle of friction ?? has little effect on it. Bare soils results show that shallow slope failure prone to occur when the slope has effective cohesion c? less than 2.40 kPa in slope angle of 1V:1H. For the same slope after the inclusion of grass, shallow slope failure prone to occur only when the slope has effective cohesion c? less than 0.56 kPa.
format	Thesis
qualification_level	Master's degree
author	Gey, Eng Keat
author_facet	Gey, Eng Keat
author_sort	Gey, Eng Keat
title	The effects of broadleaf carpet grasses (axonopus compressus) on shallow slope stability
title_short	The effects of broadleaf carpet grasses (axonopus compressus) on shallow slope stability
title_full	The effects of broadleaf carpet grasses (axonopus compressus) on shallow slope stability
title_fullStr	The effects of broadleaf carpet grasses (axonopus compressus) on shallow slope stability
title_full_unstemmed	The effects of broadleaf carpet grasses (axonopus compressus) on shallow slope stability
title_sort	effects of broadleaf carpet grasses (axonopus compressus) on shallow slope stability
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2013
_version_	1747816720785997824

The effects of broadleaf carpet grasses (axonopus compressus) on shallow slope stability

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