Staff View: An approach to joint roughness measurement in Rock-A comparative study

An approach to joint roughness measurement in Rock-A comparative study

The shear strength of a weakness plane in rock such as joint, is greatly influenced by its surface condition. Therefore, surface texture and degree of roughness are important aspects to be considered in assessing the shear strength of joint. However, the present method for measuring surface texture...

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Main Authors:	Mohd. Amin, Mohd. For, Mustaffar, Mushairry
Format:	Monograph
Language:	English
Published:	Universiti Teknologi Malaysia 2001
Subjects:	TE Highway engineering. Roads and pavements TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/2857/1/71458.pdf http://eprints.utm.my/id/eprint/2857/
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id	my.utm.2857
record_format	eprints
spelling	my.utm.28572012-09-19T05:45:32Z http://eprints.utm.my/id/eprint/2857/ An approach to joint roughness measurement in Rock-A comparative study Mohd. Amin, Mohd. For Mustaffar, Mushairry TE Highway engineering. Roads and pavements TA Engineering (General). Civil engineering (General) The shear strength of a weakness plane in rock such as joint, is greatly influenced by its surface condition. Therefore, surface texture and degree of roughness are important aspects to be considered in assessing the shear strength of joint. However, the present method for measuring surface texture are labourious and time consuming processes. This study highlights an alternative method of measurement using close-range photogrammetry. The suitability of the proposed method was verified in laboratory using a physical model of joint surface. The degree of roughness of the model surface, was measured using both photogrammetry and conventional method. All measurements were made on the same grid points marked on the model surface. Data obtained from both methods was compared in terms of peak and through height, profile shape, 3-dimensional plot and roughness index (i.e. standard deviation, absolute roughness and central line average). In the comparison process, data obtained using conventional method is used as reference. To verify its practically, the proposed method was used to measure joint surface in the field. The outcome of this study, clearly shows that photogrammetry exhibits several positive characteristics as an alternative method for measuring surface texture of joint in rock. The use of digital camera allows for a larger amount of field data to be collected and this data could be stored and processed at a later stage. Consequently, this facilities joint survey work in the field. In addition, the 3-dimensional image of the joint surface which can be readily plotted using photogrammetry data, serves as a useful tool in providing vital information on the texture of the joint surface. The image can be used as tool in assessing the surface conditions, which is an important procedure for laboratory shear test on joint in rock. Universiti Teknologi Malaysia 2001-06-30 Monograph NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/2857/1/71458.pdf Mohd. Amin, Mohd. For and Mustaffar, Mushairry (2001) An approach to joint roughness measurement in Rock-A comparative study. Project Report. Universiti Teknologi Malaysia. (Unpublished)
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
language	English
topic	TE Highway engineering. Roads and pavements TA Engineering (General). Civil engineering (General)
spellingShingle	TE Highway engineering. Roads and pavements TA Engineering (General). Civil engineering (General) Mohd. Amin, Mohd. For Mustaffar, Mushairry An approach to joint roughness measurement in Rock-A comparative study
description	The shear strength of a weakness plane in rock such as joint, is greatly influenced by its surface condition. Therefore, surface texture and degree of roughness are important aspects to be considered in assessing the shear strength of joint. However, the present method for measuring surface texture are labourious and time consuming processes. This study highlights an alternative method of measurement using close-range photogrammetry. The suitability of the proposed method was verified in laboratory using a physical model of joint surface. The degree of roughness of the model surface, was measured using both photogrammetry and conventional method. All measurements were made on the same grid points marked on the model surface. Data obtained from both methods was compared in terms of peak and through height, profile shape, 3-dimensional plot and roughness index (i.e. standard deviation, absolute roughness and central line average). In the comparison process, data obtained using conventional method is used as reference. To verify its practically, the proposed method was used to measure joint surface in the field. The outcome of this study, clearly shows that photogrammetry exhibits several positive characteristics as an alternative method for measuring surface texture of joint in rock. The use of digital camera allows for a larger amount of field data to be collected and this data could be stored and processed at a later stage. Consequently, this facilities joint survey work in the field. In addition, the 3-dimensional image of the joint surface which can be readily plotted using photogrammetry data, serves as a useful tool in providing vital information on the texture of the joint surface. The image can be used as tool in assessing the surface conditions, which is an important procedure for laboratory shear test on joint in rock.
format	Monograph
author	Mohd. Amin, Mohd. For Mustaffar, Mushairry
author_facet	Mohd. Amin, Mohd. For Mustaffar, Mushairry
author_sort	Mohd. Amin, Mohd. For
title	An approach to joint roughness measurement in Rock-A comparative study
title_short	An approach to joint roughness measurement in Rock-A comparative study
title_full	An approach to joint roughness measurement in Rock-A comparative study
title_fullStr	An approach to joint roughness measurement in Rock-A comparative study
title_full_unstemmed	An approach to joint roughness measurement in Rock-A comparative study
title_sort	approach to joint roughness measurement in rock-a comparative study
publisher	Universiti Teknologi Malaysia
publishDate	2001
url	http://eprints.utm.my/id/eprint/2857/1/71458.pdf http://eprints.utm.my/id/eprint/2857/
_version_	1643643675373207552
score	13.211869

An approach to joint roughness measurement in Rock-A comparative study

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