ANALYSIS OF INITIAL SUPPORT DESIGN OF SAMARINDA TUNNEL STA 0+425 USING LATTICE GIRDER WITH 3D MODELING

Samarinda Tunnel is a tunnel with a horseshoe geometric shape that has a height of 10.5 m and a width of 12.8 m. This tunnel will be excavated by top heading and bench excavation with excavation progress of 3 m each progress. This tunnel has a length of 400 m with the deepest depth of 62 m from g...

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Main Author: Anugrah Krista, Shela
Format: Final Project
Language:Indonesia
Online Access:https://digilib.itb.ac.id/gdl/view/76833
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Institution: Institut Teknologi Bandung
Language: Indonesia
id id-itb.:76833
spelling id-itb.:768332023-08-18T16:03:02ZANALYSIS OF INITIAL SUPPORT DESIGN OF SAMARINDA TUNNEL STA 0+425 USING LATTICE GIRDER WITH 3D MODELING Anugrah Krista, Shela Indonesia Final Project Tunnels, Rock Mass Classification, Tunnel Supports, Numerical Modeling, Lattice Girders INSTITUT TEKNOLOGI BANDUNG https://digilib.itb.ac.id/gdl/view/76833 Samarinda Tunnel is a tunnel with a horseshoe geometric shape that has a height of 10.5 m and a width of 12.8 m. This tunnel will be excavated by top heading and bench excavation with excavation progress of 3 m each progress. This tunnel has a length of 400 m with the deepest depth of 62 m from ground level. Therefore, a proper initial support system is needed to avoid the risk of collapse. The initial support system was derived from recommendations based on rock classification according to Terzaghi, RMR, and Q-System. Of the three recommendations, a combination was carried out to determine the support to be applied to the tunnel. Based on the results of the analysis, it was found that the initial support of the Samarinda tunnel consisted of lattice girder P150-25-30 with a space of 1.5 m, shotcrete K225 20 cm thick, and added reinforcement in the form of a rockbolt with a diameter of 25 mm with a length of 4 m and circumferential and longitudinal spaces along 2 m and 1.5 m. This is based on the results of the analysis which shows the formation of arch effect around the tunnel, vertical strain value of 0.09% and convergent strain of 0.04%, displacement value less than 10 cm, and SF value of shotcrete support and lattice girder from empirical and numerical calculations of more than 1.5. text
institution Institut Teknologi Bandung
building Institut Teknologi Bandung Library
continent Asia
country Indonesia
Indonesia
content_provider Institut Teknologi Bandung
collection Digital ITB
language Indonesia
description Samarinda Tunnel is a tunnel with a horseshoe geometric shape that has a height of 10.5 m and a width of 12.8 m. This tunnel will be excavated by top heading and bench excavation with excavation progress of 3 m each progress. This tunnel has a length of 400 m with the deepest depth of 62 m from ground level. Therefore, a proper initial support system is needed to avoid the risk of collapse. The initial support system was derived from recommendations based on rock classification according to Terzaghi, RMR, and Q-System. Of the three recommendations, a combination was carried out to determine the support to be applied to the tunnel. Based on the results of the analysis, it was found that the initial support of the Samarinda tunnel consisted of lattice girder P150-25-30 with a space of 1.5 m, shotcrete K225 20 cm thick, and added reinforcement in the form of a rockbolt with a diameter of 25 mm with a length of 4 m and circumferential and longitudinal spaces along 2 m and 1.5 m. This is based on the results of the analysis which shows the formation of arch effect around the tunnel, vertical strain value of 0.09% and convergent strain of 0.04%, displacement value less than 10 cm, and SF value of shotcrete support and lattice girder from empirical and numerical calculations of more than 1.5.
format Final Project
author Anugrah Krista, Shela
spellingShingle Anugrah Krista, Shela
ANALYSIS OF INITIAL SUPPORT DESIGN OF SAMARINDA TUNNEL STA 0+425 USING LATTICE GIRDER WITH 3D MODELING
author_facet Anugrah Krista, Shela
author_sort Anugrah Krista, Shela
title ANALYSIS OF INITIAL SUPPORT DESIGN OF SAMARINDA TUNNEL STA 0+425 USING LATTICE GIRDER WITH 3D MODELING
title_short ANALYSIS OF INITIAL SUPPORT DESIGN OF SAMARINDA TUNNEL STA 0+425 USING LATTICE GIRDER WITH 3D MODELING
title_full ANALYSIS OF INITIAL SUPPORT DESIGN OF SAMARINDA TUNNEL STA 0+425 USING LATTICE GIRDER WITH 3D MODELING
title_fullStr ANALYSIS OF INITIAL SUPPORT DESIGN OF SAMARINDA TUNNEL STA 0+425 USING LATTICE GIRDER WITH 3D MODELING
title_full_unstemmed ANALYSIS OF INITIAL SUPPORT DESIGN OF SAMARINDA TUNNEL STA 0+425 USING LATTICE GIRDER WITH 3D MODELING
title_sort analysis of initial support design of samarinda tunnel sta 0+425 using lattice girder with 3d modeling
url https://digilib.itb.ac.id/gdl/view/76833
_version_ 1822008094938365952