Aug 03, 2012
Midrand stormwater piping installation progressingBack
Construction|Waterfall City|Building|Concrete|Flow|Housing|Labucon Resources|Pipe|Pipes|PROJECT|Projects|Rental|Resources|Road|Roads|Rocla|Water|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 and Tubes News
Heavy-duty industrial valve manufacturing and services provider Flowrox has launched the Flowrox Expulse flexible pulsation dampener, which is designed to assist during pump and dampener maintenance by reducing noise and vibration, which can lead to pipe damage that...
Germany-based technology company Kobold Instrumentation has manufactured a polysulfone paddle switch (PPS) that can monitor flow for nominal pipe sizes greater than NW 32. Kobold develops, manufactures and sells instruments for monitoring, measuring and regulating...
Identifying a need to clarify the South African National Standards (SANS) organisation’s SANS 2001 pressure test regulations, plastic pipes manufacturer DPI Plastics in 2014 developed and published a guide on how to conduct the pressure testing of pipes.
Recent Research Reports
Steel 2015: A review of South Africa's steel sector (PDF Report)
Creamer Media’s Steel 2015 report provides an overview of the key developments in the global steel industry and particularly of South Africa’s steel sector over the past year, including details of production and consumption, as well as the country's primary carbon...
Projects in Progress 2015 - First Edition (PDF Report)
In fact, this edition of Creamer Media’s Projects in Progress 2015 supplement tracks developments taking place under the Renewable Energy Independent Power Producer Procurement Programme, which has had four bidding rounds. It appears to remain a shining light on the...
Electricity 2015: A review of South Africa's electricity sector (PDF Report)
Creamer Media’s Electricity 2015 report provides an overview of State-owned power utility Eskom and independent power producers, as well as electricity planning, transmission, distribution and the theft thereof, besides other issues.
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.
This Week's Magazine
Forest products group Sappi has confirmed the selection of its 25 MW biomass-to-power project, to be erected at its Ngodwana mill, in Mpumalanga, as a preferred bidder under the South African government’s Renewable Energy Independent Power Producer Procurement...
Information and communications technology (ICT) distributor DCC is making Windows- and Android-operating systems tablets available through retailers and education equipment suppliers to provide school children with affordable, high-performance education tools. The...
Another cement manufacturer is set to enter the Ugandan market, raising hopes that prices will come down and spur growth in the construction industry. National Cement, a Kenyan manufacturer, has unveiled plans to invest $195-million in a new manufacturing plant in...
With growth rates exceeding that in the developed world – at an average of between 4% and 5% between 2002 and 2014 – African countries provide investors with ample reason to tap into booming consumer demand says Manufacturing Circle executive director Coenraad...
The South African Chamber of Commerce and Industry’s (Sacci’s) Business Confidence Index (BCI) decreased by 3.7 index points month-on-month to 89.1 in March.