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97 Linear Metres of Slipway required stabilisation due to settlement

Category
Docks
Focus
Port Slipway
Location
Peterhead, Scotland
Duration / Year
2 weeks/ 2008
Method
GI

Ground stabilization

SUMMARY

The slipway at Peterhead port, on the northeast coast of Scotland, was built in 1931; designed for narrower and lighter vessels than today’s ships, the slipway had suffered settlement of up to 80mm. Uretek were brought in to provide a solution that would not require the break-up and replacement of existing concrete slabs, which would have been an expensive and environmentally-unfriendly option.

OBJECTIVES

The project required the stabilisation of 97 linear metres of concrete slabs supporting the rails of the slipway.

 

TECHNOLOGY APPLIED

URETEK Geopolymer Injection processes applied beneath 97 linear metres of concrete slipway at 1m centres. The URETEK Geopolymer Injection process expands to fill the voids and consolidates the ground and increases its bearing strength, resulting in long-term support support. The process provides a fast, accurate and cost-effective remedial solution for subsidence, stabilising and where possible re-levelling sunken concrete slabs.

OUTCOME

All 97 linear metres of the slipway were strengthened within a 2-week period, without disrupting the operations of the dock. No excavations were necessary, no material needed to be taken away and none brought in. “It’s just a matter of taking what’s there and making it stronger, which is much less energy intensive compared with replacing everything,” said David Buchan, Senior Port Engineer.