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OVERVIEW
Murphy Ground Engineering installed 750mm
and 880mm cased rotary piles up to 34.0m to
form a triple storey basement secant wall and
bearing piles for a new Hotel development in
Westminster. As part of the top down
construction methodology and due to limited
peripheral space, a temporary slab was
designed to accommodate construction plant
during the bulk dig and spoil removal.
Due to the loadings on the temporary slab the design required 6# 880mm piles to 25.0m depth to provide support to the slab. As these piles are temporary works in design the use of Cemfree concrete was proposed, although with specific structural requirements it was imperative for the Cemfree concrete to achieve 40N strength at 56 days as well as perform to the required piling concrete characteristics as would be expected. A total of 95m3 of “C32/40” Cemfree concrete was supplied over a period of 4 days to construct the temporary works piles using temp cased rotary bored methodology.
The use of Cemfree at Newman St was aligned with MGE involvement in the LOCOWAG project led by DB Group (Holdings) Limited (DBG). The project is government funded via the Innovate UK scheme and runs from November 2020 to November 2022.
Contact PUDLO Waterproof Systems & Cemfree Zero-Cement Concrete, part of the DB Group Ltd by clicking the button below to find out which products were used in this case study.