Bored piers; Also, commonly referred to as bored piles, drilled piers, drilled shafts, caissons, Cast-in-drilled-hole piles (CIDH piles) or Cast-in-Situ piles, are a non-displacement deep foundation method whereby deep holes are drilled in the earth for constructing concrete cylindrical foundations mainly to transfer the load of a building to the subsurface layers of the earth at different depths.
Bored piers are commonly used as a foundation solution when the ground conditions are considered fair to good (where there is no threat of shallow water table, where soils are cohesive, where rock and spoil removal isn’t a problematic or costly exercise etc.). They are generally required to support structures where there are weak soils near the surface,
A drilling method is determined. The drilling method will depend on the soil profile. Whilst a good soil investigation report will help decide on the drilling technology it is the piling contractors experience which will determine the geologically specific tooling best suited to minimize disturbance of the surrounding soil and deliver the most cost-effective outcome through increased penetration
The difference between a driven pile foundation and bored pier foundation lies in the method of construction. Bored pier foundations are typically poured in place and transfer the load only through bearing, while driven piles are driven straight in and transfer the load through friction and/or bearing. Generally, bored pier foundations are shallower in depth than the
Several considerations need to be factored in when we do a job costing: - Drilling method required - Type and size of plant and tooling required - Project Brief: Site Location Site Access Geotechnical report specifying subsurface conditions Number of holes, depth and diameter of holes required Cased or uncased piers?
Geotechnical reports, commonly known as soil reports, are fundamental in assessing subsurface conditions and in making recommendations on foundation design parameters. Recommendations and opinions in such reports are based on the interpretation of borehole logs at point locations and information from published geological maps.
Under the Building Act 1993 protection work is work that must be undertaken [by an owner who is proposing building work] to protect an adjoining property of a building site from proposed building works. It can be done on an adjoining property or on the building site where the building work is occurring, or both. An example of protection work