This paper reports about a tunnel monitoring approach based on distributed fibre optic sensing (DFOS), which allows strain and temperature measurements along the installed sensor line inside shotcrete tunnel linings with a spatial resolution of 0. Optimal distributed detection for leak detection and third-party interference monitoring by DTS and DAS with fiber optic cables and without influence of the hydraulic conditions of the pipeline, offering long measurement range with virtually no maintenance for decades. Accordingly, the health status of the tunnel is dynamically grasped, which is of great significance to ensure the. Today, modern monitoring systems allow reliable condition monitoring of tunnels using optical sensor technology, based on fiber Bragg technology. Tunnels are at the core of our infrastructure.
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[pdf] • Chad orders telecom operators Airtel and Moov Africa to connect to the national fiber optic network within one week due to poor service quality. •. Chad 's government has renewed pressure on mobile and internet operators to improve service quality after regulatory audits revealed persistent outages, coverage gaps and infrastructure weaknesses across the country. This ultimatum was delivered during a meeting on August 27, 2025, led by the Minister of. YAOUNDE —Officials in Chad are stepping up efforts to connect the central African state to a regional fiber-optic network after cable breakages caused by flooding in neighboring Cameroon caused a protracted internet blackout.
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