Deep injection Foundation

Deep injection utilizes a three-dimensional grid, with injection locations laid out across the surface of the area to be lifted and each injection location having one or more injection points at specified depths underground. Injection depths are determined based on an investigation of subsurface conditions, either via a geotechnical report provided by an engineer or by field testing with dynamic cone penetrometer performed by the installing contractor. Often both methods are used in tandem.

The accepted practice of using deep injection to lift or stabilize a structure begins with injections starting from the top down. The expanding polymer is injected into a series of tubes of differing lengths set into the ground. The tube length corresponds with predetermined target depth for each injection.