Slope stability analysis of the drainage tunnel portal in Tanju Dam, Dompu District, West Nusa Tenggara

This paper presents design results of the tunnel portal slopes at the Tanju Dam, Dompu, West Nusa Tenggara. The objective of this research was to analyse the stability of the tunnel portal slopes using circular failure chart (CFC) method, limit equilibrium method (LEM), and finite element method (FE...

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Autores principales:	Dinata Edden Umaga, Indrawan I Gde Budi, Idrus Arifudin
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/c52e9de828dc479aac7b292e655901de
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spelling	oai:doaj.org-article:c52e9de828dc479aac7b292e655901de2021-12-02T17:11:56ZSlope stability analysis of the drainage tunnel portal in Tanju Dam, Dompu District, West Nusa Tenggara2267-124210.1051/e3sconf/202132501016https://doaj.org/article/c52e9de828dc479aac7b292e655901de2021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/101/e3sconf_icst2021_01016.pdfhttps://doaj.org/toc/2267-1242This paper presents design results of the tunnel portal slopes at the Tanju Dam, Dompu, West Nusa Tenggara. The objective of this research was to analyse the stability of the tunnel portal slopes using circular failure chart (CFC) method, limit equilibrium method (LEM), and finite element method (FEM). Input parameters were obtained from drill core evaluations and laboratory tests. By considering the rock mass rating (RMR) values of rock masses, which are categorized as class II, at the two slopes, adjustments for the cohesion and inner friction angle values are made. The inlet slope (IL) have cohesion values of 350 kPa and 40º inner friction angle and the outlet slope (OL) have cohesion values of 400 kPa and 45º inner friction angle. The CFC method shows that the IL and OL have safety factor (FS) values of 3.5 and 3.44, respectively. The LEM shows that the IL and OL have the FS values of 3.69 and 3.65, respectively. Meanwhile, the FEM shows that the IL and OL have FS values of 4.78 and 4.79, respectively. The stability analysis results indicate that designed slopes are stable.Dinata Edden UmagaIndrawan I Gde BudiIdrus ArifudinEDP SciencesarticleEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 325, p 01016 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Environmental sciences GE1-350
spellingShingle	Environmental sciences GE1-350 Dinata Edden Umaga Indrawan I Gde Budi Idrus Arifudin Slope stability analysis of the drainage tunnel portal in Tanju Dam, Dompu District, West Nusa Tenggara
description	This paper presents design results of the tunnel portal slopes at the Tanju Dam, Dompu, West Nusa Tenggara. The objective of this research was to analyse the stability of the tunnel portal slopes using circular failure chart (CFC) method, limit equilibrium method (LEM), and finite element method (FEM). Input parameters were obtained from drill core evaluations and laboratory tests. By considering the rock mass rating (RMR) values of rock masses, which are categorized as class II, at the two slopes, adjustments for the cohesion and inner friction angle values are made. The inlet slope (IL) have cohesion values of 350 kPa and 40º inner friction angle and the outlet slope (OL) have cohesion values of 400 kPa and 45º inner friction angle. The CFC method shows that the IL and OL have safety factor (FS) values of 3.5 and 3.44, respectively. The LEM shows that the IL and OL have the FS values of 3.69 and 3.65, respectively. Meanwhile, the FEM shows that the IL and OL have FS values of 4.78 and 4.79, respectively. The stability analysis results indicate that designed slopes are stable.
format	article
author	Dinata Edden Umaga Indrawan I Gde Budi Idrus Arifudin
author_facet	Dinata Edden Umaga Indrawan I Gde Budi Idrus Arifudin
author_sort	Dinata Edden Umaga
title	Slope stability analysis of the drainage tunnel portal in Tanju Dam, Dompu District, West Nusa Tenggara
title_short	Slope stability analysis of the drainage tunnel portal in Tanju Dam, Dompu District, West Nusa Tenggara
title_full	Slope stability analysis of the drainage tunnel portal in Tanju Dam, Dompu District, West Nusa Tenggara
title_fullStr	Slope stability analysis of the drainage tunnel portal in Tanju Dam, Dompu District, West Nusa Tenggara
title_full_unstemmed	Slope stability analysis of the drainage tunnel portal in Tanju Dam, Dompu District, West Nusa Tenggara
title_sort	slope stability analysis of the drainage tunnel portal in tanju dam, dompu district, west nusa tenggara
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/c52e9de828dc479aac7b292e655901de
work_keys_str_mv	AT dinataeddenumaga slopestabilityanalysisofthedrainagetunnelportalintanjudamdompudistrictwestnusatenggara AT indrawanigdebudi slopestabilityanalysisofthedrainagetunnelportalintanjudamdompudistrictwestnusatenggara AT idrusarifudin slopestabilityanalysisofthedrainagetunnelportalintanjudamdompudistrictwestnusatenggara
_version_	1718381461410676736

Slope stability analysis of the drainage tunnel portal in Tanju Dam, Dompu District, West Nusa Tenggara

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