Impact of Construction Method and Ground Composition on Headrace Tunnel Stability in the Neelum–Jhelum Hydroelectric Project: A Case Study Review from Pakistan
During underground construction, the behavior of the ground is influenced by characteristics of the rock mass with situ stresses and ground water, cross section of the excavation area, excavation method, and the rate of excavation. These fundamental features are considered to ensure the support and...
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MDPI AG
2021-02-01
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author | Hafeezur Rehman Abdul Muntaqim Naji Kyoungmin Nam Saeed Ahmad Khan Muhammad Han-Kyu Yoo |
author_facet | Hafeezur Rehman Abdul Muntaqim Naji Kyoungmin Nam Saeed Ahmad Khan Muhammad Han-Kyu Yoo |
author_sort | Hafeezur Rehman |
collection | DOAJ |
description | During underground construction, the behavior of the ground is influenced by characteristics of the rock mass with situ stresses and ground water, cross section of the excavation area, excavation method, and the rate of excavation. These fundamental features are considered to ensure the support and stability of underground excavations and achieve long-term successful operation. However, the ground composition of the Himalayas hinders tunnel excavation, especially in case of mechanized tunneling; this causes time and cost overruns. This study has reviewed the recently completed Neelum–Jhelum Hydroelectric Project; the project complexities, geological environments involving significant overburden and tectonic stresses, and effects of the excavation method on tunnel stability were analyzed. The major challenges that were encountered during construction are discussed herein along with their countermeasures. An analysis of project-related data reveals that latest techniques and approaches considering rock mechanics were used to complete the project; the existing approaches and methods were accordingly verified and extended. Apart from ground composition, the excavation methods used play an important role in the occurrence of severe rock bursts. Thus, the findings of this study are expected to be helpful for future tunneling projects in the Himalayas. |
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language | English |
last_indexed | 2024-03-09T00:56:17Z |
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spelling | doaj.art-1af2e5d247804e2aaed810cd891e6ebe2023-12-11T16:51:01ZengMDPI AGApplied Sciences2076-34172021-02-01114165510.3390/app11041655Impact of Construction Method and Ground Composition on Headrace Tunnel Stability in the Neelum–Jhelum Hydroelectric Project: A Case Study Review from PakistanHafeezur Rehman0Abdul Muntaqim Naji1Kyoungmin Nam2Saeed Ahmad3Khan Muhammad4Han-Kyu Yoo5Department of Civil and Environmental Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, KoreaDepartment of Civil and Environmental Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, KoreaDepartment of Civil and Environmental Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, KoreaNeelum–Jhelum Hydropower Project, Islamabad 44000, PakistanDepartment of Mining Engineering, University of Engineering & Technology, Peshawar 25000, PakistanDepartment of Civil and Environmental Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, KoreaDuring underground construction, the behavior of the ground is influenced by characteristics of the rock mass with situ stresses and ground water, cross section of the excavation area, excavation method, and the rate of excavation. These fundamental features are considered to ensure the support and stability of underground excavations and achieve long-term successful operation. However, the ground composition of the Himalayas hinders tunnel excavation, especially in case of mechanized tunneling; this causes time and cost overruns. This study has reviewed the recently completed Neelum–Jhelum Hydroelectric Project; the project complexities, geological environments involving significant overburden and tectonic stresses, and effects of the excavation method on tunnel stability were analyzed. The major challenges that were encountered during construction are discussed herein along with their countermeasures. An analysis of project-related data reveals that latest techniques and approaches considering rock mechanics were used to complete the project; the existing approaches and methods were accordingly verified and extended. Apart from ground composition, the excavation methods used play an important role in the occurrence of severe rock bursts. Thus, the findings of this study are expected to be helpful for future tunneling projects in the Himalayas.https://www.mdpi.com/2076-3417/11/4/1655empirical classificationground compositionproject-related features |
spellingShingle | Hafeezur Rehman Abdul Muntaqim Naji Kyoungmin Nam Saeed Ahmad Khan Muhammad Han-Kyu Yoo Impact of Construction Method and Ground Composition on Headrace Tunnel Stability in the Neelum–Jhelum Hydroelectric Project: A Case Study Review from Pakistan Applied Sciences empirical classification ground composition project-related features |
title | Impact of Construction Method and Ground Composition on Headrace Tunnel Stability in the Neelum–Jhelum Hydroelectric Project: A Case Study Review from Pakistan |
title_full | Impact of Construction Method and Ground Composition on Headrace Tunnel Stability in the Neelum–Jhelum Hydroelectric Project: A Case Study Review from Pakistan |
title_fullStr | Impact of Construction Method and Ground Composition on Headrace Tunnel Stability in the Neelum–Jhelum Hydroelectric Project: A Case Study Review from Pakistan |
title_full_unstemmed | Impact of Construction Method and Ground Composition on Headrace Tunnel Stability in the Neelum–Jhelum Hydroelectric Project: A Case Study Review from Pakistan |
title_short | Impact of Construction Method and Ground Composition on Headrace Tunnel Stability in the Neelum–Jhelum Hydroelectric Project: A Case Study Review from Pakistan |
title_sort | impact of construction method and ground composition on headrace tunnel stability in the neelum jhelum hydroelectric project a case study review from pakistan |
topic | empirical classification ground composition project-related features |
url | https://www.mdpi.com/2076-3417/11/4/1655 |
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