Pipeline crossing, sleeve piling — Northern Victoria
38 permanently cased bored piles to support a new gas pipeline crossing through saturated alluvial ground. Casing left in place per design for long-term integrity.
A new gas pipeline crossing in northern Victoria passed through saturated alluvial ground that wouldn’t hold an open bore. The principal needed sleeve piling — bored piles installed inside permanent steel casing — to guarantee long-term pile integrity beneath the pipeline support frames.
We installed 38 cased piles between 8 and 16 metres deep, varying along the alignment with the crossing geometry and ground profile. Permanent casing was rotated through the saturated layer first, then the pile bore advanced inside the casing to design depth, cage dropped, and concrete placed by tremie to displace any ground water.
Each location had a casing record (depth, ovality, joint locations) attached to the pour record and packaged into the principal’s pipeline integrity documentation.