Soil #Mattressing is deformation caused by high water pressures. When mattressing occurs it is a sign that effective refusal has been reached for that particular moisture content and that the pore pressures induced by the construction are preventing the particles from adopting a closer packing arrangement. Should higher densities and the ability to pass test rolling be required the most effective treatment would be to reduce the moisture content. The reason for mattressing is likely associated with the underlying soils being over-wet.
There are several approaches which may be considered in order to fill or compact on a site having soil matressing however each method has its pros and cons.
In the below example a working platform comprising of geofabric and a high permeability free-flowing drainage layer to relieve #groundwater pore pressure was implemented to provide structural support and to allow #construction to proceed.
We were in the Melton area today and came across a bridge and road upgrade
Sometimes we just can’t understand the Rhyme
Soil #Mattressing is deformation caused by high water pressures
Site Geotechnical undertook asphalt coring within one of Melbournes busiest freeways to obtain asphalt samples.
Looking for resilient subgrade preparation on soft soils
After approximately 20 years this foam bitumen stabilised (FBS) pavement in Hoppers Crossing
Foam Bitumen Stabilisation (FBS) works being conducted
Innovation, collaboration and the extraordinary efforts of the project team and key stakeholders
Site Geotechnical were asked to determine reasoning for sinkholes
Macadam is a type of road construction.
Site Geotechnical - Mini Rig Great little job
Safely investigate during the day
Detailed Geotechnical investigation followed by considered structural design