Geotechnical and geological studies of Adit-6 of the railway tunnel between Rishikesh and Karnprayag in India focusing on the excavation methods and design of support analysis: a case study

During the design and implementation of underground constructions, the risk assessment and management of geological hazards are important due to the hazards such as the water inflow, collision with crushed fault zones, squeezing and instability around excavation zones. In the present research, it is attempted to study and assess the risk of geological hazards in 378+021 km of the route of Ardabil-Mianeh railway tunnel using the harmony search algorithm (HSA). In the first section of research, after studying structural and geological characteristics during 24 sections of the excavation route, the risk relating to geological hazards including the tunnel instability, squeezing, water inflow and swelling was assessed in three separate classes using HSA. In order to study the accuracy of results, geological hazards recorded during the implementation of excavation operations were used. Studies obtained from the comparison of observed and predicted results indicate the high accuracy of HSA in the assessment and prediction of geological risks in the tunnelling project.

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Implementation of structural health monitoring into life cycle management of tunnels: Case study Tunnel Brajdica

10.5592/co/cetra.2020.1276 ◽

2021 ◽

Author(s):

Irina Stipanović ◽

Meho Saša Kovačević ◽

Sandra Škarić Palić ◽

Mario Bačić ◽

Kenneth Gavin

Keyword(s):

Life Cycle ◽

Laser Scanning ◽

Life Cycle Management ◽

Performance Model ◽

Road Tunnel ◽

Management Scenarios ◽

Limit States ◽

Railway Tunnel

This paper presents a case study focused on the Brajdica railway tunnel, which carries the Zagreb-Rijeka railway line into the port of Rijeka in Croatia and thus represents a critical node on the European TEN-T network. The tunnel is undergoing a major reconstruction project to increase its capacity. As part of this work an extensive embedded monitoring system comprising inclinometers, extensometers, micrometers and survey markers were installed to monitor the tunnel response. This data is supplemented with periodical laser scanning of the tunnel interior. Measurement profiles are set along the tunnel bore and the data collected is used for the development of a tunnel performance model. Long-term monitoring data from a neighbouring road tunnel was used to develop models tho predict the long-term response of the Karst bedrock in the area. Combining these models with the settlements measured during the construction phase of the works at Brajdica railway tunnel allow prediction of settlements and the future occurrence of damage in the rail tunnel. Based on different limit states, life cycle management scenarios are developed and used for maintenance planning, with the aim to decrease short and long-term risks. This work has been performed within European H2020 SAFE-10-T project.

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TUNNEL CONSTRUCTION IN PIR PANJAL (HIMALAYA) USING NATM [CASE STUDY T-74R RAILWAY TUNNEL OF KATRA-BANIHAL SECTION OF KASHMIR RAIL PROJECT]

i-manager’s Journal on Civil Engineering ◽

10.26634/jce.6.1.3750 ◽

2016 ◽

Vol 6 (1) ◽

pp. 48

Author(s):

Bukhari Syed Kaiser ◽

Dar Ayaz Mohmood ◽

Yousuf Maqboo ◽

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...

Keyword(s):

Tunnel Construction ◽

Railway Tunnel

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