Performance of pullout resistance of anchored earth system by field pullout test

Anchored Earth System had been developed from combination of the techniques used in reinforced earth and soil anchoring. Instead of using steel strip as a reinforcement, Anchored Earth System consist of round steel bar (tendon) with precast concrete block attached at the free end of each of the rein...

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Main Author:	Loh, Wee Loon
Format:	Thesis
Language:	English
Published:	2010
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/10626/6/LohWeeLoonMFKA2010.pdf
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id	my-utm-ep.10626
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spelling	my-utm-ep.106262017-09-28T00:25:29Z Performance of pullout resistance of anchored earth system by field pullout test 2010-03 Loh, Wee Loon TA Engineering (General). Civil engineering (General) Anchored Earth System had been developed from combination of the techniques used in reinforced earth and soil anchoring. Instead of using steel strip as a reinforcement, Anchored Earth System consist of round steel bar (tendon) with precast concrete block attached at the free end of each of the reinforcing steel bars, and it is backfilled with granular material or suitable earth fill. This research project can be considered a case study of anchored reinforced soil wall which investigates the performance of Anchored Earth System due to its pullout capacity. In this study, pullout resistance which contributed by friction between the backfill material and the shaft surface of reinforcing tendon, and the passive earth pressure against the concrete anchor block, can be evaluated through pullout tests. The main problems to be studied in this project are the results obtained from field pullout test are different from the calculated theoretical values and there is a non-zero intercept at relationship of pullout force against overburden pressure. The field pullout tests were carried out in three conditions: i) with reinforcing tendon only; ii) with anchor block only; and iii) with both reinforcing tendon and anchor block together in order to determine the sharing of resistance in the system. The pullout test was also done under soaked condition. The average interaction coefficient a’ = 1.99 and bearing factor ß = 6.32 were determined by back analysis. It was found that the sharing of load between the tendon and the anchor block in anchored earth system is not equal, but most of the resistance is contributed by the bearing passive of anchor block where approximately 30 % of resistance contributed by residual frictional resistance and 70 % contributed by peak bearing passive resistance. The pullout resistance in soaked condition observed to be lower than in unsoaked condition due to the increase in pore water pressure that reduced the shear resistance. 2010-03 Thesis http://eprints.utm.my/id/eprint/10626/ http://eprints.utm.my/id/eprint/10626/6/LohWeeLoonMFKA2010.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty 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) Loh, Wee Loon Performance of pullout resistance of anchored earth system by field pullout test
description	Anchored Earth System had been developed from combination of the techniques used in reinforced earth and soil anchoring. Instead of using steel strip as a reinforcement, Anchored Earth System consist of round steel bar (tendon) with precast concrete block attached at the free end of each of the reinforcing steel bars, and it is backfilled with granular material or suitable earth fill. This research project can be considered a case study of anchored reinforced soil wall which investigates the performance of Anchored Earth System due to its pullout capacity. In this study, pullout resistance which contributed by friction between the backfill material and the shaft surface of reinforcing tendon, and the passive earth pressure against the concrete anchor block, can be evaluated through pullout tests. The main problems to be studied in this project are the results obtained from field pullout test are different from the calculated theoretical values and there is a non-zero intercept at relationship of pullout force against overburden pressure. The field pullout tests were carried out in three conditions: i) with reinforcing tendon only; ii) with anchor block only; and iii) with both reinforcing tendon and anchor block together in order to determine the sharing of resistance in the system. The pullout test was also done under soaked condition. The average interaction coefficient a’ = 1.99 and bearing factor ß = 6.32 were determined by back analysis. It was found that the sharing of load between the tendon and the anchor block in anchored earth system is not equal, but most of the resistance is contributed by the bearing passive of anchor block where approximately 30 % of resistance contributed by residual frictional resistance and 70 % contributed by peak bearing passive resistance. The pullout resistance in soaked condition observed to be lower than in unsoaked condition due to the increase in pore water pressure that reduced the shear resistance.
format	Thesis
qualification_level	Master's degree
author	Loh, Wee Loon
author_facet	Loh, Wee Loon
author_sort	Loh, Wee Loon
title	Performance of pullout resistance of anchored earth system by field pullout test
title_short	Performance of pullout resistance of anchored earth system by field pullout test
title_full	Performance of pullout resistance of anchored earth system by field pullout test
title_fullStr	Performance of pullout resistance of anchored earth system by field pullout test
title_full_unstemmed	Performance of pullout resistance of anchored earth system by field pullout test
title_sort	performance of pullout resistance of anchored earth system by field pullout test
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2010
url	http://eprints.utm.my/id/eprint/10626/6/LohWeeLoonMFKA2010.pdf
_version_	1747814798622457856

Performance of pullout resistance of anchored earth system by field pullout test

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