$Characterization of granitic subsurface profile by borehole logging and seismic refraction method$

Characterization of granitic subsurface profile by borehole logging and seismic refraction method

Due to tropical climate in nature of Malaysia, related region experience extreme weathering process that lead to unique subsurface profile. As weathering process proceed from the surface down and inwards, from joint surfaces and other percolation paths, the intensity of the weathering generally redu...

Full description

Saved in:

Bibliographic Details
Main Author:	Ahmadol, Afifi Fahmi
Format:	Thesis
Language:	English
Published:	2020
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/85741/1/AfifiFahmiAhmadolMSKA2020.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.85741
record_format	uketd_dc
spelling	my-utm-ep.857412020-07-30T07:30:34Z Characterization of granitic subsurface profile by borehole logging and seismic refraction method 2020 Ahmadol, Afifi Fahmi TA Engineering (General). Civil engineering (General) Due to tropical climate in nature of Malaysia, related region experience extreme weathering process that lead to unique subsurface profile. As weathering process proceed from the surface down and inwards, from joint surfaces and other percolation paths, the intensity of the weathering generally reduces as depth increases. The seismic refraction method had been used to determine the rock characteristic of the study area. This study aim to characterize the granitic area by seismic refraction method and boreholes information at Sungai Long Quarry, Cheras. This study involve 6 lines of seismic refraction and 6 boreholes that were drilled on the same paths. The study was conducted by using the ABEM MK-8 (seismograph), a 6.5kg sledgehammer with a steel plate and 24 channels geophones. EasyRefract software been used to process the seismic refraction survey data, which based on primary waves velocities distributed from seismograph. Results obtained from the conventional borehole logging, which are the N-value Standard Penetration Test, Core Recovery Ratio and Rock Quality Designation, were evaluated and correlated with primary wave velocity for subsurface interpretation. Results were found that the correlation between Core Rock Recovery give better correlation with seismic velocity value as compared to Rock Quality Designation. Correlation of both ground investigation exhibit an indicator for producing N-values prediction especially in a tropical granitic setting environment. N-values 50 of each boreholes recorded between 1140m/s to 1513m/s whereas N-values below 50 were recorded less than 800m/s. In addition, the highly weathered zone interpreted in the survey lines could be related to the medium dense to dense material that exist on top of boulder. On the other hand, N-value shows fair correlation to seismic velocity which exhibit value less than 1500m/s. Generally, both RQD of 0% to 97% and CRR of 33% to 100% values shows seismic velocity values, which ranges from 750 m/s to 2100m/s. The wide range of value is due to thick soil profile before reaching the bedrock. Hence, some masking affect contributed to the variation of depth. 2020 Thesis http://eprints.utm.my/id/eprint/85741/ http://eprints.utm.my/id/eprint/85741/1/AfifiFahmiAhmadolMSKA2020.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Engineering - School of Civil Engineering Faculty of Engineering - School of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Ahmadol, Afifi Fahmi Characterization of granitic subsurface profile by borehole logging and seismic refraction method
description	Due to tropical climate in nature of Malaysia, related region experience extreme weathering process that lead to unique subsurface profile. As weathering process proceed from the surface down and inwards, from joint surfaces and other percolation paths, the intensity of the weathering generally reduces as depth increases. The seismic refraction method had been used to determine the rock characteristic of the study area. This study aim to characterize the granitic area by seismic refraction method and boreholes information at Sungai Long Quarry, Cheras. This study involve 6 lines of seismic refraction and 6 boreholes that were drilled on the same paths. The study was conducted by using the ABEM MK-8 (seismograph), a 6.5kg sledgehammer with a steel plate and 24 channels geophones. EasyRefract software been used to process the seismic refraction survey data, which based on primary waves velocities distributed from seismograph. Results obtained from the conventional borehole logging, which are the N-value Standard Penetration Test, Core Recovery Ratio and Rock Quality Designation, were evaluated and correlated with primary wave velocity for subsurface interpretation. Results were found that the correlation between Core Rock Recovery give better correlation with seismic velocity value as compared to Rock Quality Designation. Correlation of both ground investigation exhibit an indicator for producing N-values prediction especially in a tropical granitic setting environment. N-values 50 of each boreholes recorded between 1140m/s to 1513m/s whereas N-values below 50 were recorded less than 800m/s. In addition, the highly weathered zone interpreted in the survey lines could be related to the medium dense to dense material that exist on top of boulder. On the other hand, N-value shows fair correlation to seismic velocity which exhibit value less than 1500m/s. Generally, both RQD of 0% to 97% and CRR of 33% to 100% values shows seismic velocity values, which ranges from 750 m/s to 2100m/s. The wide range of value is due to thick soil profile before reaching the bedrock. Hence, some masking affect contributed to the variation of depth.
format	Thesis
qualification_level	Master's degree
author	Ahmadol, Afifi Fahmi
author_facet	Ahmadol, Afifi Fahmi
author_sort	Ahmadol, Afifi Fahmi
title	Characterization of granitic subsurface profile by borehole logging and seismic refraction method
title_short	Characterization of granitic subsurface profile by borehole logging and seismic refraction method
title_full	Characterization of granitic subsurface profile by borehole logging and seismic refraction method
title_fullStr	Characterization of granitic subsurface profile by borehole logging and seismic refraction method
title_full_unstemmed	Characterization of granitic subsurface profile by borehole logging and seismic refraction method
title_sort	characterization of granitic subsurface profile by borehole logging and seismic refraction method
granting_institution	Universiti Teknologi Malaysia, Faculty of Engineering - School of Civil Engineering
granting_department	Faculty of Engineering - School of Civil Engineering
publishDate	2020
url	http://eprints.utm.my/id/eprint/85741/1/AfifiFahmiAhmadolMSKA2020.pdf
_version_	1747818446433812480

Characterization of granitic subsurface profile by borehole logging and seismic refraction method

Similar Items