Latest from Tunnels and Tunnelling


LATEST NEWS

Mill Creek Drainage Tunnel TBM unveiled
22 January, 2020 Texas – The City of Dallas unveiled the 11.6m-diameter hard rock machine that will bore the 8km-long Mill Creek Drainage Relief Tunnel. The machine, manufactured by Robbins, will change diameter at one point along the bore and continue at a diameter of 9.9m.
  • Sydney Metro finishes city centre tunnels
    Australia – Four out of five drives for the Sydney Metro’s ‘City and Southwest’ phase have been completed. The most recent breakthrough was into Barangaroo Station. These drives represent the entirety of the city centre tunnels, with only a second tube crossing the harbour still to be completed. As of 21 January, some 97% of tunnel excavation had been completed.
  • Single Delta tunnel to start environmental review
    California-- Jeffrey Kightlinger, general manager of the Metropolitan Water District of Southern California, announced January 15 the California Department of Water Resources issued a Notice of Preparation (NOP) initiating the environmental review process for a single-tunnel conveyance solution in the Sacramento-San Joaquin Delta.
  • GHH adds to equipment range
    Germany – Mining and tunnelling machinery manufacturer GHH announced a major increase in its range. Some 18 machine types were announced in November 2019, due to an alliance with Titan.

LATEST FEATURES

Alan Thomas Winter (1952-2019)
20 January, 2020 It is almost a year since Alan died unexpectedly in January 2019. Those who worked with Alan respected his immense knowledge and vast practical experience that he brought to bear for the benefit of numerous projects and clients. In addition, Alan was also well known and admired for his sense of humour and quick ability to add wit to alleviate the stress of crisis.
  • Long-term effectiveness of PVC Geomembranes
    Tests detailed in this paper verified the effectiveness of geomembranes up to 100 years. The authors are Andrea Luciani, Department of Environment, Land and Infrastructure Engineering, Politecnico di Torino; Daniele Peila, same; Enrico Dal Negro, Underground Technology Team Director, Mapei; Maurizio Leotta, Synthetic Waterproofing Division Director, Mapei; Enrico Pavese, Underground Technology Team Waterproofing Specialist, MAPEI; and Sara Cadamuro, Synthetic Waterproofing Membranes R&D, Mapei
  • The Valley of Toluca
    A new rail line will connect the Valley of Toluca Metropolitan Area with the west of Mexico City. TBM tunnelling had to deal with a heterogeneous massif, adverse terrain, and an alignment characterised by the presence of faults and zones with elevated hydraulic loads of up to 7 bar over the tunnel keystone. The authors of this paper are geotechnical tunnels head José Ramos Gómez, tunnel section director Rubén Díez de la Fuente, and TBM expert advisor Ignasi Castellvi Moyes, all from Sener
  • City & Southwest
    Alex Conacher visits the Sydney Metro’s second phase to speak with Terry Sleiman, project director for the contractor John Holland CPB Ghella, Hugh Lawson, project director for the client, and Kate Cole, occupational health and hygiene manager for Transport for NSW