CASE STUDY www.harrisongroupuk.com PROJECT: SITE INVESTIGATION FOR RESIDENTIAL DEVELOPMENT LOCATION: GREENWICH PENINSULA - BUGSBY REACH VALUE: £190K • W indow sampler boreholes • T rial pits and trenches • In-situ Californian Bearing Ratio (CBR) tests • Gas/ground water & tidal monitoring The site works proved challenging as shallow obstructions from previous structures and foundations were encountered. In addition to this a 1m thick band of limestone was present at approximately 22m depth prevented the deep cable percussion boreholes achieving their required depth. A rotary drilling rig was employed to penetrate this layer in order to confirm the depth of the Thanet Sand formation. To complete the site works, all trial pits and trenches wi

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