Combining seismic and geotechnical methods to improve the prediction of physical soil properties

Seismic investigation offers subsurface information in a cost and time effective way compared with the geotechnical methods. The seismic data (i.e. bender element data) needs to be correlated with geotechnical data allowing it to be adopted in engineering designs. However, the procedures and analysi...

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Main Author:	Alshameri, Badee
Format:	Thesis
Language:	English English
Published:	2017
Subjects:	QE500-639.5 Dynamic and structural geology
Online Access:	http://eprints.uthm.edu.my/315/1/24p%20BADEE%20ALSHAMERI.pdf http://eprints.uthm.edu.my/315/2/BADEE%20ALSHAMERI%20WATERMARK.pdf
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spelling	my-uthm-ep.3152021-07-21T04:21:05Z Combining seismic and geotechnical methods to improve the prediction of physical soil properties 2017-06 Alshameri, Badee QE500-639.5 Dynamic and structural geology TA703-712 Engineering geology. Rock mechanics. Soil mechanics. Seismic investigation offers subsurface information in a cost and time effective way compared with the geotechnical methods. The seismic data (i.e. bender element data) needs to be correlated with geotechnical data allowing it to be adopted in engineering designs. However, the procedures and analysis of bender element (BE) data can be subjected to crucial errors due to several limitations in the BE tools such as the magnitude of seismic source and frequency range. In addition, little attention had been paid to adopt field BE despite the other field seismic methods having low resolution when assessing the properties of the thin targeting layers of soil as pavement layers. Therefore, this research aim was to evaluate the limitations and reliability of BE procedure in the laboratory and the field. The research had two main stages; laboratory and model stages. In the laboratory stage, the BE limitations were assessed using homogeneous and unchanged properties of polystyrene sample instead of soil. In addition, various mixtures of sand-kaolin were investigated using the shear box, compaction and BE to obtain its empirical correlation as well as the obtained result was used to construct the soil model. In the model stage, the multi-thin layers model consisting of sand-kaolin mixtures was constructed for the purpose of suggesting the field BE procedure. The laboratory BE results recommended that the two sensors relative rotation shall be less than 50o, the position of two sensors alignment ratio between the horizontal and vertical distance shall be less than 0.5, and the effect of sample boundary occured when the ratio between the distance to sample boundary and the sample thickness less than 0.38. In model stage; the recommended procedure to be adopted in the field was via placing the BE sensors spacing less than 1 m and the BE crosshole method via placing the sensors at both side of the targeted layer was the best option. However, this method required some of the testing preparation. In conclusion, the BE limitations and procedures in the laboratory and field had been evaluated and investigated then recommended the procedures to improve the reliability of the BE results. 2017-06 Thesis http://eprints.uthm.edu.my/315/ http://eprints.uthm.edu.my/315/1/24p%20BADEE%20ALSHAMERI.pdf text en public http://eprints.uthm.edu.my/315/2/BADEE%20ALSHAMERI%20WATERMARK.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Fakulti Kejuruteraan Awam dan Alam Bina
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English
topic	QE500-639.5 Dynamic and structural geology QE500-639.5 Dynamic and structural geology
spellingShingle	QE500-639.5 Dynamic and structural geology QE500-639.5 Dynamic and structural geology Alshameri, Badee Combining seismic and geotechnical methods to improve the prediction of physical soil properties
description	Seismic investigation offers subsurface information in a cost and time effective way compared with the geotechnical methods. The seismic data (i.e. bender element data) needs to be correlated with geotechnical data allowing it to be adopted in engineering designs. However, the procedures and analysis of bender element (BE) data can be subjected to crucial errors due to several limitations in the BE tools such as the magnitude of seismic source and frequency range. In addition, little attention had been paid to adopt field BE despite the other field seismic methods having low resolution when assessing the properties of the thin targeting layers of soil as pavement layers. Therefore, this research aim was to evaluate the limitations and reliability of BE procedure in the laboratory and the field. The research had two main stages; laboratory and model stages. In the laboratory stage, the BE limitations were assessed using homogeneous and unchanged properties of polystyrene sample instead of soil. In addition, various mixtures of sand-kaolin were investigated using the shear box, compaction and BE to obtain its empirical correlation as well as the obtained result was used to construct the soil model. In the model stage, the multi-thin layers model consisting of sand-kaolin mixtures was constructed for the purpose of suggesting the field BE procedure. The laboratory BE results recommended that the two sensors relative rotation shall be less than 50o, the position of two sensors alignment ratio between the horizontal and vertical distance shall be less than 0.5, and the effect of sample boundary occured when the ratio between the distance to sample boundary and the sample thickness less than 0.38. In model stage; the recommended procedure to be adopted in the field was via placing the BE sensors spacing less than 1 m and the BE crosshole method via placing the sensors at both side of the targeted layer was the best option. However, this method required some of the testing preparation. In conclusion, the BE limitations and procedures in the laboratory and field had been evaluated and investigated then recommended the procedures to improve the reliability of the BE results.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Alshameri, Badee
author_facet	Alshameri, Badee
author_sort	Alshameri, Badee
title	Combining seismic and geotechnical methods to improve the prediction of physical soil properties
title_short	Combining seismic and geotechnical methods to improve the prediction of physical soil properties
title_full	Combining seismic and geotechnical methods to improve the prediction of physical soil properties
title_fullStr	Combining seismic and geotechnical methods to improve the prediction of physical soil properties
title_full_unstemmed	Combining seismic and geotechnical methods to improve the prediction of physical soil properties
title_sort	combining seismic and geotechnical methods to improve the prediction of physical soil properties
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Fakulti Kejuruteraan Awam dan Alam Bina
publishDate	2017
url	http://eprints.uthm.edu.my/315/1/24p%20BADEE%20ALSHAMERI.pdf http://eprints.uthm.edu.my/315/2/BADEE%20ALSHAMERI%20WATERMARK.pdf
_version_	1747830580339277824

Combining seismic and geotechnical methods to improve the prediction of physical soil properties

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