Case study: mining culverts

Mesa A Railway Project – Pilbara Region, WA – December, 2008.

Client: MacMahon Contractors, WA

Project Scope: Benefil RG30 foam injection of the void space between the box culvert and the earth covered pipeline to provide stabilisation of the void space under the railway line, for a length of 45 lm and a gross volume of 100m3.

Methodology: Injection pipes were inserted on each side of the pipeline within the box culvert, from both sides of the railway line. HDPE pipes were inserted into the PVC conduits to halfway and slowly withdrawn as part of the reverse injection process. With temperatures above 45 degrees C, and the site based challenges of being 1600km from Perth, the job required careful planning