Mechanical behaviour of splicing joints in shield tunnel lining subjected to fire

Yu, Yin; Guo, Zhen; Song, Jun; Liu, Yi; Wang, Xiangren; Liu, Yibo

doi:10.1016/j.tust.2022.104404

Cited by 9 publications

(2 citation statements)

References 20 publications

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“…When fire occurs inside tunnels, it generally provokes structural health problems. Indeed, fire hazards are major issues affecting the structures of tunnels [105,106], and habitually engender huge damage such as casualties and financial losses [101,[105][106][107][108][109][110][111]. These huge consequences of fires are mainly due to the typical compact space and complex structures of tunnels [108,112].…”

Section: The Need For Fire Monitoring In Deep Rock Tunnelsmentioning

confidence: 99%

“…The effects of fires on the structure of tunnels, and in particular on the linings are well recognized [101,103,106,111,[113][114][115][116], and spalling damage is mostly the predominant process of failure in concrete structures [111,117]. As examples, serious damage has been recorded in north section of the Central Park North-110th Street Subway station of Manhattan owing to a fire that occurred on 27 March 2020 [105]. The concrete lining of a tunnel was damaged up to two-thirds due to several hours of fires accompanied with a temperature of 800℃ [118].…”

Section: The Need For Fire Monitoring In Deep Rock Tunnelsmentioning

confidence: 99%

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Towards Long-Term Monitoring of the Structural Health of Deep Rock Tunnels with Remote Sensing Techniques

Frenelus,

Peng

2023

Frattura Ed Integrità Strutturale

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Due to the substantial need to continuously ensure safe excavations and sustainable operation of deep engineering structures, structural health monitoring based on remote sensing techniques has become a prominent research topic in this field. Indeed, throughout their lifetime, deep tunnels are usually exposed to many complex situations which inevitably affect their structural health. Therefore, appropriate and effective monitoring systems are required to provide real-time information that can be used as a true basis for efficient and timely decision-making. Since sensors are at the heart of any monitoring system, their selection and conception for deep rock tunnels necessitates special attention. This work identifies and describes relevant structural health problems of deep rock tunnels and the applicability of sensors employed in monitoring systems, based on in-depth searches performed on pertinent research. The outcomes and challenges of monitoring are discussed as well. Results show that over time, deep rock tunnels suffer several typical structural diseases namely degradation of the excavation damaged areas, corrosion of rock bolts and cable bolts, cracks, fractures and strains in secondary lining, groundwater leaks in secondary lining, convergence deformation and damage provoked by the triggering of fires. Various types of remote sensors are deployed to monitor such diseases. For deep rock tunnels, it is suggested to adopt comprehensive monitoring systems with adaptive and robust sensors for their reliable and long-lasting performance.

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