ASAP Piling — Difficult Ground Specialists
Permanent Cased Piles Melbourne — Difficult Ground Foundation Specialists
Permanent cased piles use a structural steel tube that stays in the ground as the outer shell of the pile. The casing keeps the borehole from collapsing in soft or loose ground and protects the concrete inside it. ASAP Piling installs permanent cased piles on projects where ground conditions — including very soft clays, loose wet sands, or high groundwater — make standard open bored piling impractical, or where the engineer specifies permanent casing as part of the pile design.
What Is a Permanent Cased Pile?
A permanent cased pile uses a steel tube as its outer shell — unlike conventional bored piles where any temporary steel casing is extracted after concreting, the permanent casing stays in the ground as part of the finished pile. The casing holds the borehole open during drilling and concreting, and protects the concrete column for the life of the structure.
Permanent steel casing does three things: it prevents borehole collapse in soft or unstable ground; it protects the concrete shaft in aggressive ground conditions; and in some designs, the steel tube contributes to the pile's structural strength alongside the reinforced concrete inside it.
When Are Permanent Cased Piles Used?
Very Soft Clays
Ground so soft that a standard borehole collapses before concrete can be placed. The steel casing holds the hole stable throughout drilling and concreting.
Loose Wet Sands
Saturated sandy ground where water floods into any open borehole. The casing seals the hole and allows concrete to be placed under controlled conditions.
High Groundwater
Sites where the water table is at or near the surface and any open hole fills with water immediately. The casing prevents this throughout the operation.
Engineer-Specified Casing
Situations where the structural engineer specifies permanent casing as part of the pile design — for structural reasons or where borehole stability must be guaranteed throughout the build.
Specifications
Frequently Asked Questions
Permanent Cased Pile Enquiries
Call Nick on 0499 888 799 with your geotechnical report and engineer's drawings.