Highway 99 Emergency Call Out

Toolboxes > Geotechnical > Void Filling

Published: Wed, Jul 22, 2020

Contributor: Glenn Votkin | Profile | Articles

Deep under Highway 99, a large pipe ramming project is underway, however under the highway lie some very large boulders creating havoc for the tunneling contractor.

Problem: with each ram the boulders shift, creating voids between the road surface and the pipe, resulting in a sinking road surface.

Solution: injection of Polyurethane Resins in the crown of the pipe. Resin as a liquid will encapsulate the soils, binding them together, then reacting and filling voids.