Aug 03, 2012
Midrand stormwater piping installation progressingBack
Construction|Waterfall City|Concrete|Flow|Housing|Labucon Resources|Pipe|Pipes|PROJECT|Projects|Rental|Resources|Road|Roads|Rocla|Water|Building|Flow|Pipes|Road Infrastructure|Juskei River|Craig Waterson|Infrastructure|Johann Van Niekerk|Sias Swart|Water|Pipe
© Reuse this
The progress of what is set to become Midrand’s new central business district is overseen by developers Atterbury Property and will comprise 800 000 m2 of rental space when the project is completed in 2018.
The stormwater piping project began in November last year and was initially planned for completion in November this year; how- ever, various additions to the project resulted in the completion date for the overall stormwater piping project being moved to early 2013.
Rocla was initially contracted to supply 1 550 t of stormwater piping, but was asked to provide an additional 350 t. The storm- water piping is also being extended to an adjacent housing development.
The installation of all piping at Waterfall City is well advanced. Other aspects of the project, such as the construction of roads, will be completed by early next year.
Construction company Labucon Resources is building the roads according to Johannesburg Roads Agency (JRA) standards.
Rocla sales executive Johann van Niekerk says the size of the interlocking joint pipes, which weigh up to 7.5 t each and vary in diameter from 450 mm to 1 950 mm, was a challenge, as large trenches had to be dug to accommodate their size and volume.
Labucon Resources project site manager Sias Swart adds, however, that the pipes posed no quality issues and the quick supply from Rocla allowed for swift installation.
“It was important that the material was supplied as quickly as possible so that we have enough time to start building the roads, which will start soon.”
Once the roads have been built, the JRA will take over responsibility for the stormwater and road infrastructure.
Meanwhile, Swart points out that one of the challenges experienced during the stormwater piping installation was groundwater, which produced a high water table in areas that were being excavated.
To manage and prevent structural problems between the trenches and the piping, bidem sheeting and 150 mm of stone bedding were placed around the piping.
The bidem sheeting was installed on embankments above the pipes to prevent ground- water from penetrating beneath the road surface material.
The stone bedding provides stability for the pipes and prevents soil movement from exert- ing stress on the pipe joints.
Groundwater was also pumped out of trenches and the area was laid with concrete.
The stormwater pipes will drain the site and release the water into three channels, all of which will eventually flow into the Juskei river.
To prevent soil erosion, Rocla supplied the precast wingwalls required for the project.
The wingwalls direct the water into and out of pipes, reducing turbulence and improving the hydraulic capacity of the conduit, says Rocla sales and marketing director Craig Waterson.
“Precast wingwalls are equipped with a separate concrete toe, which keys the entire unit to the ground and prevents any movement, which also reduces the risk of scouring the soil below or to the side of the toe,” he explains.
The wingwalls were introduced to the South African market in June, last year, and Waterfall City was one of the first projects in Gauteng where these have been used, says Van Niekerk.
Rocla will also supply manholes, which are installed at the points where the pipes change direction.
The stormwater pipes, wingwalls and manholes are manufactured at Rocla’s premises in Roodepoort.
Edited by: Chanel de Bruyn© Reuse this Comment Guidelines (150 word limit)
Other Pipes, Tubes and Hoses News
Recent Research Reports
Construction 2015: A review of South Africa’s construction sector (PDF Report)
Creamer Media’s Construction 2015 Report examines South Africa’s construction industry over the past 12 months. The report provides insight into the business environment; the key participants in the sector; local construction demand; geographic diversification;...
Liquid Fuels 2014 - A review of South Africa's Liquid Fuels sector (PDF Report)
Creamer Media’s Liquid Fuels 2014 Report examines these issues, focusing on the business environment, oil and gas exploration, the country’s feedstock supplies, the development of South Africa’s biofuels industry, fuel pricing, competition in the sector, the...
Water 2014: A review of South Africa's water sector (PDF Report)
Creamer Media’s Water 2014 report considers the aforementioned issues, not only in the South African context, but also in the African and global context, and examines the issues of water and sanitation, water quality and the demand for water, among others.
Defence 2014: A review of South Africa's defence industry (PDF Report)
Creamer Media’s Defence 2014 report examines South Africa’s defence industry, with particular focus on the key participants in the sector, the innovations that have come out of the sector, local and export demand, South Africa’s controversial multibillion-rand...
Road and Rail 2014: A review of South Africa's road and rail infrastructure (PDF report)
Creamer Media’s Road and Rail 2014 report examines South Africa’s road and rail transport system, with particular focus on the size and state of the country’s road and rail network, the funding and maintenance of these respective networks, and the push to move road...
Real Economy Year Book 2014 (PDF Report)
This edition drills down into the performance and outlook for a variety of sectors, including automotive, construction, electricity, transport, steel, water, coal, gold, iron-ore and platinum.
This Week's Magazine
The World Bank, the European Union, the African Development Bank (AfDB) and the government of Sweden have agreed to provide Zimbabwe and Zambia with $294-million for the repair of structural deformations on the Kariba dam wall and avert the possible collapse of the...
Executive chairperson of the Global Electricity Initiative (GEI) Philippe Joubert says energy utilities globally, together with the business community more generally, have come to terms with the science of climate change, particularly as extreme weather events begin...
JSE-listed Emira Property Fund reported distribution growth per participatory interest (PI) of 9% for the six months ended December 31, 2014.
Sub-Saharan Africa is still faced with the challenge of providing citizens access to electricity and an additional $450-billion will need to be invested to ensure that people in urban areas have access to electricity by 2040.
Consulting Engineers South Africa (Cesa) last month said it was dismayed that the Department of Water and Sanitation (DWS) was seconding 35 Cuban engineers on a two-year contract to share their expertise with South African engineers in the water sector.