Management of Hydropower Tunnels to Prevent Collapse and Remedial Measures

Tun, Sein Win; Singal, S.K.

doi:10.3126/hn.v19i0.15349

Cited by 2 publications

(3 citation statements)

References 21 publications

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“…More often, tunnel failure occurs when safety is compromised at any stage of the planning, design, and execution. Tun and Singal, 2016 have described few effective techniques to be adopted during construction to prevent the collapse of tunnels.…”

Section: Methodsmentioning

confidence: 99%

“…Failure of the tunnel may occur due to a lack of ground investigations either with geological or/and geotechnical perspective before excavation (Karlsurd, 2010). The failure of the tunnel occasionally occurs in construction due to lack of proper management and careless mistakes during excavation, and sometimes compromise of safety over expense and time (Tun and Singal, 2016;Sajjad, et. al., 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Based on the extent, failure of tunnels can be categorized as a) complete collapse, b) cave in with cavity, and c) rockfall. Based on the location of occurrence, (Tun and Singal, 2016) differentiated failures are a) at or around the tunnel portal, b) along the finished length of the tunnel and c) at the tunnel face or crown portion. The design of tunnels in disturbed and sheared flysch presents a significant challenge to engineers.…”

Section: Introductionmentioning

confidence: 99%

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Prevention and Mitigation Management of Tunnel Collapse and Failure during Construction-A Review

Rehman

Hussain

Tahir

et al. 2023

IJEEG

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Empirical and numerical methods of design play a vital role in assessing rock mass behaviour quantitatively and qualitatively for the design of underground structures and support systems. The purpose of this research is to review the techniques used for the management and prevention of failures that occur in rock mass for safe, stable, efficient, and economical design of support system for underground structures especially tunnels in diverse rock mass conditions. Failure of tunnels in rocks can occur during construction as well as during service; however, the former is very common. The most challenging task in tunnel construction is the rehabilitation and remedial process of the failed tunnel section. Unfortunately, due to differences in nature, shape, and type of failure, each case needs to be treated discretely and independently. The risk of failure can be minimized by implementing prior preventive measures, while the success of rehabilitation is based on better management of rehabilitation work. However, both prevention and rehabilitation need ample investigative knowledge that can be learned from case histories. The current work is related to the prevention and mitigation methods of tunnel failure and collapses that occur during the early stages of tunnel designing.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Prevention and Mitigation Management of Tunnel Collapse and Failure during Construction-A Review

Rehman

Hussain

Tahir

et al. 2023

IJEEG

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Design of a Self-Supporting Liner for the Renovation of a Headrace Tunnel at Chivor Hydropower Project

Río¹,

Caballero²,

Muñoz³

et al. 2023

Water

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Ensuring access to affordable, reliable, sustainable, and modern energy, as declared in the United Nations’ Agenda 2030, requires both the inclusion of new renewable energy sources, and the renovation of existing hydropower infrastructure, since this resource is considered a key strategy to support flexibility in electric grids with high penetrations of variable generation. This paper addresses the design of a self-supporting lining for the renovation of a headrace tunnel, that has been affected by a buckling event, in order to extend the operating life of the Chivor Hydropower Project, located in Colombia. Studies performed by AES Corporation about the buckling events that affected the headrace tunnel and the condition assessment are first described. Then, the design alternatives to renovate this important part of the hydropower plant’s infrastructure are presented in a general way. The detailed design and construction planning for the selected alternative are then illustrated by showing some calculations used in hydropower design. Such a renovation project is one of the first of its class in Colombia and goes from studies of the buckling events to the design of a modern lining that will be constructed while keeping the 1000-MW (6% of Colombia’s demand) hydropower plant in operation conditions, in order to extend its life for 50 more years, which represents an example for managers and practitioners of large-scale hydraulic engineering projects.

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Management of Hydropower Tunnels to Prevent Collapse and Remedial Measures

Cited by 2 publications

References 21 publications

Prevention and Mitigation Management of Tunnel Collapse and Failure during Construction-A Review

Prevention and Mitigation Management of Tunnel Collapse and Failure during Construction-A Review

Design of a Self-Supporting Liner for the Renovation of a Headrace Tunnel at Chivor Hydropower Project

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