Project Overview
Moore Construction delivered the sheet piling design and construction works for a new sewer pump station on Selwyn Road, Rolleston, on behalf of Selwyn District Council.
The project involved the formation of a deep wet well structure approximately 9.5m x 9.5m and up to 9.0m deep, requiring a fully engineered temporary works solution to manage ground stability and site safety under challenging conditions.
Scope of Works
Our team executed a full design-and-build delivery, covering temporary works engineering, sheet pile installation, structural support systems, and final demobilisation.
- Installation of 12m long sheet piles using pitch-and-drive methodology
- Excavation support for deep wet well construction
- Fabrication and installation of walers and internal props
- Ongoing alignment control and structural monitoring
- Safe removal and demobilisation of temporary works
Design & Engineering
A key strength of this project was our integrated approach to design. Moore Construction worked alongside specialist geotechnical engineers to produce a fully compliant temporary works design under a PS1 Producer Statement.
The design was tailored specifically to the ground conditions and loading requirements of the site, ensuring the excavation maintained integrity throughout construction while meeting New Zealand Building Code standards.
Construction Delivery
Installation works were carried out using Moore Construction’s in-house heavy plant, including an 80-tonne crawler crane fitted with an ICE Vibe 52B vibratory hammer.
Guide walers and bracing systems were installed and welded in place to ensure stability during excavation. Following completion of the wet well structure in March 2025, all temporary works were safely removed.
