STABILIZATION AND EMPTY FILLING IN THE BASIS OF AN OPERATING LIGHTHOUSE SCARBORO

BASE REINFORCEMENT AND VOID FILLING
Category
Infrastructure facilities
FOCUSС
Reinforcement base
LOCATIONЕ
Scarborough, UK
TIME/YEAR
2 days/2010
TECHNOLOGY
Deep injection

SUMMARY
Scarborough Lighthouse was originally built in 1804 and subsequently rebuilt in 1931. During the renovation process, it was discovered that it was built on a pier built using sheet piles. However, over time, the filler between the piles eroded and voids appeared in it. This compromised the integrity of the entire structure.

TARGET
The project required URETEK to fill the voids between the sheet piles and stabilize the existing foundation. The work was carried out under water at a depth of up to 3 meters along a perimeter of 30 meters long.

APPLIED TECHNOLOGY

The Uretek team used their pioneering method of injecting geopolymer resin as a void filler and consolidator of existing aggregate to create a water barrier that is insensitive to corrosive environments while also providing a solid foundation for structures. Along the 30-meter section of the pier, specialists injected Uretek resins at points located 1 meter and 2 meters below the surface of the water. The project was complicated by the fact that the voids were underwater. This required a professional diving team to help facilitate the injection process. A team of technicians developed a special waterproof housing that could receive resins underwater for insertion through a 12mm tube into voids.

RESULT
The project was successfully completed within two days. The existing voids were filled and the structure of the pier base was stabilized.

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