MMC Diving Services

"Since 1964"

Telephone: 01983 864 330
Email: enquiries@mmcdivingservices.co.uk

  • Underwater Hydro Demolition

    Underwater Hydro Demolition

    MMC Divers complete underwater Hydro Demolition works at The Port of Felixstowe

UNDERWATER HYDRO DEMOLITION

Client: Volker Fitzpatrick Ltd for the Port of Felixstowe

Principle Contractor: Volker Stevin Ltd

Duration: 6 weeks

Contract Value: £130,000

Date posted: 04-05-2018

MMC Divers undertook the diving works at night in black water during the punishingly cold ice temperatures within the Port of Felixstowe. The bad spell of UK weather named "the beast from the east" created snowy conditions, recorded as some of the lowest temperatures the UK has experienced in over 60 years, even this didn't stop our team from undertaking and completing the works.

Phase 1 consisted of divers cutting the concrete using a 220 HP pump, with 52 litres per min output and a 1.45mm pencil jet to cut two 400mm wide slots 3.3 meters deep and 1.5 metres back into the slab. These cutting works were needed to drive sheet piles down through the concrete slab to tie in the new wall. Divers worked out of a LARS basket with a custom built gimble bearing mounted on the front to hold themselves in position while undertaking the cutting.

Phase 2 and Phase 3 of the works involved underwater burning using broco, underwater cold cutting and underwater welding, these works were to complete the cofferdam tie in, in preparation for a mass concrete pour.

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