The Amethyst hydro scheme aims to address the increasing demand for power in the area. It involves diverting water from the Amethyst Ravine through penstocks in a 1040 m tunnel to a powerhouse on the floodplain of the Wanganui River. The 3.5 x 3.5 m…
This paper presents insights from recent advanced laboratory testing of undisturbed and reconstituted specimens of Christchurch silty-sands. The purpose of the testing was to establish the cyclic strength of silty-sands from sites in the Central Business District (CBD), where liquefaction was observed in 4 September…
Because of their lightweight, highly crushable and compressible nature, pumiceous sands are problematic from engineering and construction viewpoint. There has been very little information on their liquefaction characteristics and most empirical procedures available in evaluating the liquefaction potential of sands are derived primarily from hard-grained sands. To understand the…
The soil site spectra for site classes D and E in the current NZ design code impose a significant increase in the displacement demands, between 50 and 300% for a structure with a period of 1.0s or longer, compared with a rock site (class A/B)…
Three existing landfills for wastes from Carter Holt Harvey Pulp & Paper, Tasman have or are reaching the end of their lives. These landfills receive primary solids (boiler fly-ash, wood fibre and lime mud – dewatered to 25-30%), secondary solids (slurry of dewatered dredgings from wastewater treatment plant…
Biosolids are a mixture of water and organic material, which are a by-product from domestic and industrial sewage treatment processes. Biosolids for this research were obtained from a wastewater treatment plant located in west of Melbourne, Australia. As part of this research, an extensive suite of geotechnical tests…
In Australia, over 300,000 dry tonnes of biosolids are produced and millions of dollars expended for their management annually. Biosolids are the end product and the main solid component collected from the wastewater treatment process. In this study, some of the geotechnical properties of two biosolids samples from…
Field inspection of steep slopes adjacent to transport corridors can pose serious safety hazards. An accident that occurred on one such project highlights the risks and safety considerations posed for geotechnical fieldwork. Geomorphic evaluation of slopes was undertaken in the Waioeka Gorge to assess the risk to the…
Explorations of the ground for geotechnical purposes entail a risk of striking buried services. Without mitigation the risk of striking a buried service is greater especially in urban areas where the number of buried services is increasing plus a larger proportion of exploration is undertaken and value…
Sydney Ports Corporation completed in 2013 the construction of the new Bulk Liquids Berth (BLB2) at Port Botany, NSW. (The BLB2 LP was transferred to NSW Ports on 1 June 2013 as part of the 99 year lease for Port Botany and Port Kembla). The berth construction…