The Semmering Base Tunnel is a railway tunnel 27.3 km long. ‘Mega’ civil engineering projects require geotechnical monitoring to validate construction techniques and materials – and reduce the risk of unforeseen events. This is not always easy. Total stations require the presence of survey personnel in the tunnel space during excavation. Steep angles, dust and dirt mean they are not always effective. Distributed fiber optic sensing provides continuous strain monitoring of the tunnel and shaft shotcrete linings during the 8-10 years construction and 150 years operation.
Read the Case Study here- PDF
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