Soil Consolidation work continues; a thin cement grout is injected, which fills all voids and interstices, binding the material into a solid mass; the idea is to form first a containment barrier or shell, and then to fill against that out until it reaches the exterior or edge of the required bearing weakness. There is one serious fault which has to be judged in the system, and that is where an adjoining structure does not get such bearing, and it therefore continues to settle, whilst the surrounding soil/ground does not; differential settlement is a nightmare. Very often drilling is the only way to check if the ball of pressure can be maintained over the whole site, as it is not always possible to have bleeder holes to view exiting grout. 1st February 2009
