In January 2025, we undertook the sheet piling works for a 9.5 m × 9.5 m wet well excavation at the new pump station on Selwyn Road sub-contractor for CORDE/Selwyn District Council. The excavation reached depths of up to 9.0 m, necessitating 12 m-long sheet piles installed using the pitch-and-drive method. Our team mobilised our owned 80 t crawler crane equipped with an ICE Vibe 52B vibratory hammer and dedicated power pack to drive the piles efficiently and accurately. Guide walers and props were welded in place to maintain structural alignment and stability throughout the excavation phase.
The entire temporary works setup was engineered under a Producer Statement PS1 for design, ensuring compliance with performance requirements and site-specific ground conditions. Once the wet well construction was complete in March 2025, the temporary walers, props, and welds were systematically removed—allowing for a clean demobilization. This project underscores our experience in delivering deep excavations supported by engineered temporary works, with seamless coordination between design, plant deployment, and site restoration.
