Evaluation of bending moment and deflection of cantilever supported excavations

In many conditions, because of several restrictions, cantilever walls are the only way to stabilize the excavations. It is no doubt that one of the most important parameters in design of such walls is wall stiffness. Therefore, in this study, a large number of case histories are collected and the mo...

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Autores principales:	Seyed Hamid Yasrebi, Abolfazl Eslami
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2017
Materias:	cantilever retaining wall bending moment deflection allowable depth wall stiffness granular soil Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/c24003c670eb4dbb8d012513440ca34d
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id	oai:doaj.org-article:c24003c670eb4dbb8d012513440ca34d
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spelling	oai:doaj.org-article:c24003c670eb4dbb8d012513440ca34d2021-11-08T15:46:44ZEvaluation of bending moment and deflection of cantilever supported excavations2476-39772538-261610.22065/jsce.2017.75680.1069https://doaj.org/article/c24003c670eb4dbb8d012513440ca34d2017-11-01T00:00:00Zhttps://www.jsce.ir/article_45208_a29cd07e25134094da1de7d8f7947ada.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616In many conditions, because of several restrictions, cantilever walls are the only way to stabilize the excavations. It is no doubt that one of the most important parameters in design of such walls is wall stiffness. Therefore, in this study, a large number of case histories are collected and the most commonly used range of wall thickness and stiffness are determined based on this database. In addition, validation of limit equilibrium method (LEM) in granular soils showed that this method can only estimate bending moment of rigid walls. Therefore, for more accurate estimating, a new equation is presented for the most commonly used range of wall stiffness and various types of granular soils. Moreover, LEM based equation is replaced with a modified version. The new equation was successfully validated using 70 numerical models and results lied in range of 85% to 115% times the predicted values obtained from FEM. According to the results, in loose and very loose soils, the common cantilever walls can only stabilize the excavations with depth less than 10 m. While if depth is more than 15 m, soil type should be dense or very dense with “E” more than about 70 MPa. The results also show that the effect of wall stiffness is negligible in bending moments less than 2000 kN.m.Seyed Hamid YasrebiAbolfazl EslamiIranian Society of Structrual Engineering (ISSE)articlecantilever retaining wallbending momentdeflectionallowable depthwall stiffnessgranular soilBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 4, Iss 3, Pp 28-41 (2017)
institution	DOAJ
collection	DOAJ
language	FA
topic	cantilever retaining wall bending moment deflection allowable depth wall stiffness granular soil Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	cantilever retaining wall bending moment deflection allowable depth wall stiffness granular soil Bridge engineering TG1-470 Building construction TH1-9745 Seyed Hamid Yasrebi Abolfazl Eslami Evaluation of bending moment and deflection of cantilever supported excavations
description	In many conditions, because of several restrictions, cantilever walls are the only way to stabilize the excavations. It is no doubt that one of the most important parameters in design of such walls is wall stiffness. Therefore, in this study, a large number of case histories are collected and the most commonly used range of wall thickness and stiffness are determined based on this database. In addition, validation of limit equilibrium method (LEM) in granular soils showed that this method can only estimate bending moment of rigid walls. Therefore, for more accurate estimating, a new equation is presented for the most commonly used range of wall stiffness and various types of granular soils. Moreover, LEM based equation is replaced with a modified version. The new equation was successfully validated using 70 numerical models and results lied in range of 85% to 115% times the predicted values obtained from FEM. According to the results, in loose and very loose soils, the common cantilever walls can only stabilize the excavations with depth less than 10 m. While if depth is more than 15 m, soil type should be dense or very dense with “E” more than about 70 MPa. The results also show that the effect of wall stiffness is negligible in bending moments less than 2000 kN.m.
format	article
author	Seyed Hamid Yasrebi Abolfazl Eslami
author_facet	Seyed Hamid Yasrebi Abolfazl Eslami
author_sort	Seyed Hamid Yasrebi
title	Evaluation of bending moment and deflection of cantilever supported excavations
title_short	Evaluation of bending moment and deflection of cantilever supported excavations
title_full	Evaluation of bending moment and deflection of cantilever supported excavations
title_fullStr	Evaluation of bending moment and deflection of cantilever supported excavations
title_full_unstemmed	Evaluation of bending moment and deflection of cantilever supported excavations
title_sort	evaluation of bending moment and deflection of cantilever supported excavations
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2017
url	https://doaj.org/article/c24003c670eb4dbb8d012513440ca34d
work_keys_str_mv	AT seyedhamidyasrebi evaluationofbendingmomentanddeflectionofcantileversupportedexcavations AT abolfazleslami evaluationofbendingmomentanddeflectionofcantileversupportedexcavations
_version_	1718441699029549056

Evaluation of bending moment and deflection of cantilever supported excavations

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