It’s a problem that’s plagued coal miners for generations: loose rock falling from the roof, a hazard requiring constant attention.
During the past 20 years there has been a great deal of interest in obsoleting the use of welded wire mesh for underground secondary roof support applications.
Welded wire mesh has inherent issues with material handling, related to unusable material loss, personal injuries and installed longevity. Mines report that for every ten welded wire panels transported underground, one cannot be installed. Injuries associated with welded wire mesh installation range from shoulder and back sprains to hand and facial punctures.
Geofabrics New Zealand Ltd were proud to be awarded the Images Award at the Civil Contractors Federation Hawkes Bay 23rd Annual Dinner and Awards on Friday night which was attended by an excess of 130 people. Congratulations, to Robert Fris who accepted the award for Geofabrics and Annie as
In April 2017 a consultant enquired about the use of a GCCM (Geosynthetic Cementitious Composite mat) in rehabilitating an eroding drainage channel for a local government authority, which they thought would be an economical solution to their problem. The channel was to be 3.2 m wide crest to crest and 100 m long. The objective was for the channel to be installed up stream of a new guardrail installation and to protect the new guardrail footings from being scoured in the event of a heavy rainfall event.
Fluid storage tanks have many applications within the mining industry including at well heads and fluid processing facilities, for irrigation water storage, dust suppression water storage, construction water, potable water and grey water at camps. They are also suitable for wash down bays.
Our client used bidim C Range conductive geotextile as part of its lining containment system on two double lined brine water storage tanks to deliver significant savings in design time, construction time, expenditure and environmental impacts compared with traditional regulated dam construction.
Appointed by the Western Australian State Government under a PPP design, build, maintain contract the EduWest Project Co are tasked with delivering four new primary schools and two new high schools in and around Perth.
Woven mesh gabions and Reno Mattresses® are used for a range of solutions in both geotechnical and hydraulic disciplines.
WT Partnership’s report, Track Formation Rehabilitation Options (Geofabrics) – Cost Options and Whole of Life Comparisons (June 2016), was carried out comparing a range of different scenarios using Geosynthetics and comparing them to conventional track formation practices which do not utilise Geosynthetic solutions.
The study investigated a 200 metre long section of track renewal over a 40 year life span and made conservative assumptions around total replacement costs. The study investigated three capital works life span replacement intervals: 15, 20 and 25 years. These intervals can be considered conservative as geosynthetics have proven to contribute to the performance of rail lines for intervals in excess of these time frames.
Geotextile sand containers have been used for the protection of Australian coast and river shorelines for nearly 25 years.
It turns out that Geotube dewatering is much more cost effective than using the most common mechanical dewatering systems based on data published by the US EPA. How can this be? Operation and maintenance costs alone for a belt filter press costs between AU$140 to AU$350 per dry ton of solids. Operation and maintenance for a centrifuge system can range from AU$110 to AU$370 per dry ton of solids. Add in capital depreciation and the required polymer flocculent costs for both systems and the cost can easily double.
I love looking back to see how things have converged together to create a different present day. Step back just five years ago and how we lived our daily life was slightly different. Step back ten years, and it was much different. However the fun part is always looking at the things happening today and trying to envision (and then create) a different future. After all, to be viewed as a market leader, one must lead.
Historically we have seen our geosynthetic products as performing specific functions, whether it be separation, reinforcement or containment. Some of the more versatile products can perform several functions.
For the future, our vision is to take our “dumb products” and turn them into “smart geosynthetics” using the inherent properties of graphene. That is, move from products that perform a function (or functions) and allow them to also act as a sensor to collect data.
Whole of life cost on rail track has become increasingly important as rail asset owners and operators look for ways to maximise their maintenance budgets whilst maintaining safety and serviceability.
This suburban NSW Wastewater Treatment Plant has a capacity of up to 18 mega Litres per day servicing up to approximately 75,000 people. For normal operations, the plant makes use of 2 belt filter presses to dewater biosolids to 14-17 percent solids. The biosolids are removed by truck daily to be sent to land crops and sugar cane farms.
South Australia Cricket Association (SACA) and Adelaide City Council recently collaborated on the redevelopment of Narnungga (Park 25) which will include a new multi-purpose sports pavilion to replace the existing sporting clubhouses, improved cricket and football fields and a floodlit beach sports facility.
One of the biggest issues historically with the football/cricket field had been its undulating surface and poor drainage. This was in part due to the clay type soils typical of this region coupled with poor natural drainage. Therefore one of the most important aspects of the project was ensuring that the drainage was significantly improved to ensure excellent ongoing playing conditions during the wet and dry season for both SACA and the local South Australian Amateur Football league.
Thomas Malthus, author of An Essay on the Principle of Population, is often ignored or derided today. The general commentary on Malthus goes something like this: “oh yeah, isn’t he that guy that predicted we were all going to starve because the population was increasing faster than the rate of food production… what a fool to not predict all the technology that allows us to keep growing”. Indeed, the world population at the time of publication, 1798, was about 1 billion and today the estimated population is 7.5 billion. What an achievement!
Polyethylene geomembranes are used in dams, landfills and tailings dams as the primary hydraulic barrier to separate contaminants from groundwater. Logic would suggest liner design would therefore include hydraulic or permeability values for these products, but these are not seen in project specifications. The explanation is that if you ensure that the geomembrane PE formulation meets site conditions, and ensure that certain basic mechanical properties are met with emphasis on thickness (1.5–2.0 mm+), then permeability through the liner can be assumed to be extremely low. It is design analysis of potential holes and liner stress post placement that determines hydraulic performance and good design requires an understanding of these potential damage mechanisms.
Geofabrics New Zealand Ltd are pleased to announce the completion of the New Zealand Transport Agency (NZTA) approval process for all our Geosynthetic Reinforcing products which meet clause 6.8.1 of the Bridge Manual 3rd edition of the NZ Transport Agency’s Bridge Manual.
Not all geotextiles are created equal when it comes to cushioning performance and it is important to consider this when specifying these products.
Geofabrics Australasia Pty Ltd (Geofabrics), the Australasian leader in geosynthetics, today entered into a distributor agreement with Concrete Canvas Ltd (Concrete Canvas), the inventors of the innovative Concrete Canvas® Geosynthetic Cementitious Composite Mat (GCCM).
Approved by Network Rail in the UK and national rail authorities across the world, Tensar TriAx geogrid is specifically designed for use in track beds.
In 2014/15 over $1 billion was spent by Australian rail asset owners and operators on track maintenance works. However, a recent report prepared by industry leading cost consultants, WT Partnership, has shown that a reduction in maintenance costs can be achieved if asset owners and operators embraced innovative geosynthetic solutions to reduce whole of life costs.
BIS Shrapnel’s Engineering Construction in Australia 2016 – 2030 September 2016 update highlighted two significant events in the Australian Engineering Construction sector: Transition of the mining and resources segment from Capex to Opex and a move by state and federal governments to invest in road and rail transport infrastructure following the 2011 to 2015 trough in public sector investment.
Gabion structures have been around for well over 100 years and in the 21st century Maccaferri gabions have been used to build structures over 70 m high. Double twist (DT) mesh gabions can be used in many applications from architectural to structurally sensitive projects.
Anyone who uses the road infrastructure in Australia also makes a small contribution to what are known as road-deposited sediments (RDS). The contribution of one individual is insignificant but the net effect of all of our combined road use results in a significant amount of waste material. What are road-deposited sediments? Road-Deposited Sediments are small particulates that accumulate around our road infrastructure.
The ferocious storms which pounded the NSW and Southern Queensland coasts last weekend brought into focus the Climate Council's 2014 report Counting the Costs: Climate Change and Coastal Flooding.
The report predicts that more than $226 billion in commercial, industrial, road and rail, and residential assets around Australian coasts are potentially at risk by 2100 due to rising sea levels and climate change. The report also calculates that 52% of Australia's coastline is susceptible to recession due to climate change, rising sea levels and storm surges.
In two instances along the coast Council and landowners have worked to proactively protect their beachfront from the effects of climate change; protecting their beaches from the impact of last weekend’s storms.
Geofabrics has been awarded Australian Manufacturer of the Year at the 2016 Manufacturers' Monthly Endeavour Awards in the Industrial Products category for our Trinet® and Flownet® geonet geocomposite drainage systems.