Danish contractor Uretek has launched a new deep resin injection technique it claims can rectify subsidence up to six times faster than traditional underpinning techniques. Power Piles are resin filled geotextile bags made from a densely woven high strength polypropylene.
The bags and injection rods are installed into boreholes of 63mm to 100mm diameter. As resin is injected the bags inflate, displacing surrounding ground until injection pressure and earth pressure are balanced. The firm says 30 to 50 linear metres can be installed in a week.