C RWG
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C RWG
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Logging fracture systems in the Chalk: part of a site investigation for a proposed CERN proton-accelerator site, the forerunner of the Large Hadron Collider, at Mundford, Norfolk. Continuous cores with an RQD = 0 (gravel-sized rubble) and an absence of exposures left in situ logging in 0.75m-diameter bucket-auger pile holes as the only affordable (i.e. cheap) option. The site satisfied the engineering criteria, but what self-respecting nuclear physicist would want to live in rural Norfolk in preference to Geneva with a generous foreign-service allowance?
Fitting the keystone in a 100-inch diameter concrete-segment lined tunnel. The Ely-Ouse Water Transfer Scheme beneath the Cambridgeshire fens enables excess water collected in flood-relief drainage channels to be transferred to Essex. The project was a good example of collaboration between a complex engineering scheme and geological research at the site-investigation stage. The continuously cored boreholes drilled along the line of the tunnel route enabled the stratigraphy of the Cretaceous rocks to be examined in detail and the most suitable route chosen (in the Gault Formation) for a soft-ground tunnel boring machine (TBM) to be used.
