For information on FlatMesh – our award-winning wireless asset condition monitoring solution, call: 0207 731 8269 email: gsmith@senceive.com visit: senceive.com ©2015 Senceive Ltd. Hurlingham Studios, Ranelagh Gardens, London SW6 3PA CASE STUDY Monitoring Brunel’s Box Tunnel CLIENT: AECOM/NETWORK RAIL THE CHALLENGE The Great Western Mainline is being electrified. It passes through Brunel’s 3km Box Tunnel, bored through four distinct strata and two geological fault zones. It was completed in 1841 and subsequently lined due to structural instability. There is a complex and irregular geometry with 2km of brick lined sections, 350m of unlined sections and 464m of free standing brick arches. In order to achieve clearances for overhead lines, the track was lowered by up to 350mm. T

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