Patented Precast Shaves Costs on Korean Highway | ENR.
ENR Construction
JULY 31, 2012
Freyssinet’s $30-million subcontract entails building the tunnel in an open trench. Unevenly backfilling such tunnels can introduce unsymmetrical loads on the three-pin arches, which could lead to an accident like the one that felled a TechSpan tunnel in Gerards Cross, England, six years ago (ENR 7/11/05 p. Slideshows.
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