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Forming a new route for drainage
21 September, 2001
High-density polyethylene void formers have proved effective in providing drainage and pressure relief at the Black Hill Tunnels for Hong Kong's Mass Transit Railway Corporation. N G Swannell, associate director, Halcrow Group; T R M Greig, tunnel design team leader, Halcrow Group; F Belhomme, technical manager, Dumez GTM-Chun Wo JV; and A Bamforth, managing director, ABG, explain how the project was carried out.