Jul 20, 2012
Post-2010 construction activity slump continuesBack
Parktown|Trenchless Technologies|South Africa|Directional Drilling Services|Fibre-optic Infrastructure|Municipal Infrastructure|Pipes|Steel|Sam Efrat|The 2010 FIFA World Cup|World Cup Games|Fibre Optic
© Reuse this
“The big investments made by municipalities that hosted World Cup games have resulted in them spending most of their budget and they are still recovering,” says Trenchless Technologies MD Sam Efrat.
“A lack of recovery of municipal rates and taxes has put additional pressure on municipal budgets and this has resulted in a decline in municipal infrastructure spending,” he adds.
Efrat notes that companies that service the municipal infrastructure sector, such as Trenchless Technologies, have seen a decline in the projects put out to tender since 2010.
He points out that the company was involved in seven rehabilitation projects in 2010, five projects in 2011, and three projects in the first half of this year.
“Fortunately, we have seen an increase in the amount of tendered work available this year and are looking forward to a steady increase in projects in the second half of the year,” says Efrat.
He notes that the future outlook is very promising, as it is estimated that around R60-billion a year has to be spent over the next ten years to cope with the infrastructure required to secure South Africa’s water supplies, and much of this work will involve rehabilitation of our ageing municipal sewer and water pipes.
The company makes use of the directional drilling method to install fibre-optic infrastructure, as well as water and sewer pipes. As a result of the fibre optic roll-out and the increased rate of urbanisation in South Africa, demand has increased for directional drilling services.
Efrat says there has been an increase in the number of tenders involving directional drilling, particularly on the long-haul fibre-optic networks between South Africa’s major cities.
The drilling process involves three main stages: drilling a pilot hole, pilot-hole enlargement, and pullback installation of the carrier pipe. The technique can be used in various ground conditions. The borehole is supported by a bentonite drilling fluid, which prevents the borehole from collapsing.
“We are involved as a subcontractor to specialist contractors in the rehabilitation of concrete structures Con-Solve Civils. Con-Solve Civils is responsible for relining the reservoir, as the concrete has cracked and requires maintenance. A portion of Con-Solve Civils’ contract also requires the rehabilitation of the old 600 NB steel feeder pipes from one reservoir to another and the (bulk) pipe delivering water from the reservoir to the network.
Our work entailed cleaning the pipes, conducting closed-circuit television inspections and sliplining and grouting in place a new 560 PE 100 PN 10 pipe into the old 600 NB steel pipe and the installation of numerous new valves and chambers,” says Efrat.
The new high-density polyethylene pipe (HDPE) has a smaller diameter than the old steel pipe, but as it has a much smoother bore with a low coefficient of friction and better flow properties and this allows the replacement of the larger steel pipe with the smaller HDPE pipe while still maintaining the same amount of flow down the pipe.
Further, in July, Trenchless Technologies started work on Phase 5 of the Barberton asbes- tos cement pipe replacement project, using the trenchless technique of pipe bursting, where hydraulic rod pullers, as well as percussive hammers, are used to crack old pipe, which is pushed into the surrounding soil and simultaneously replaced with a new HDPE pipe that is pulled into position,” he says.
In urban areas where there are more pavements, roadways and housing, trenchless technology is more cost efficient and results in fewer disruptions than the conventional excavation method previously used.
“A lot of townships employ midblock sewers and it is also difficult to gain access to people’s properties to undertake the replacement by excavation – it is also extremely disruptive,” says Efrat.
He adds that trenchless technology mitigates many health and safety issues experienced when excavating in busy roadways, emits less carbon emissions and has less of an impact on the environment than traditional pipe-laying methods.
Edited by: Chanel de Bruyn© Reuse this Comment Guidelines
Other Water News
Article contains comments
Updated 32 minutes ago Employment in the formal nonagricutural sector increased by 16 000 persons, or 0.2%, quarter-on-quarter during the three months ended September 30, to an estimated 8.45-million employees, Statistics South Africa (Stats SA) has found. On a year-on-year basis,...
Updated 51 minutes ago The roll-out of e-tolling on Gauteng’s highways has resulted in a “lot of work” for fleet administrators, says Imperial Fleet Management (IFM) CEO Nicholas De Canha. The need to make payments within seven days, every seven days – if not using a prepaid or...
Recent Research Reports
Defence 2013: A review of South Africa's defence industry (PDF Report)
Creamer Media’s 2013 Defence Report examines South Africa’s defence industry, with particular focus on the key players in the sector, the innovations that have come out of the defence sector, local and export demand, South Africa’s controversial...
Road and Rail 2013: A review of South Africa's road and rail infrastructure (PDF Report)
Creamer Media’s Road and Rail 2013 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...
Liquid Fuels 2013 (PDF Report)
Creamer Media’s 2013 Liquid Fuels report examines South Africa’s liquid fuels market, focusing on the business environment, oil and gas exploration, the country’s feedstock supplies, the development of South Africa’s biofuels industry, fuel pricing,...
Projects in Progress - Second Edition (PDF Report)
Creamer Media’s second Projects in Progress supplement considers some of the major project developments under way, including high-profile energy and transport projects, as well as a few of the lower-profile public and private developments. What remains apparent is...
Water 2013: A review of South Africa’s water sector (PDF Report)
Creamer Media’s Water 2013 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.
Canadian Mining Roundup for June 2013 (PDF Report)
The June 2013 roundup includes details of the development of TSX-V-listed Aldridge Minerals’ flagship Yenipazar polymetallic project, in Turkey; the Canadian Nuclear Safety Commission’s renewal of Cameco’s uranium mining licence pertaining to the Cigar Lake...
This Week's Magazine
Mitsubishi Motors South Africa (MMSA) has introduced a 4x2 derivative of its Pajero Sport sports-utility vehicle (SUV), which will give it access to a substantial slice of the full-size SUV market, where it will compete with the likes of the Ford Everest, Chevrolet...
South African Energy Minister Ben Martins has affirmed that the government wants the country to be globally competitive in the nuclear sector. "Our responsibility has always been ... to ensure that, in nuclear energy, South Africa can compete with the rest of the...
Mercedes-Benz South Africa (MBSA) president and CEO Dr Martin Zimmermann describes the new S-Class as “a special place to be”, with the car creating a sense of “wellness” once you are seated inside the German brand’s flagship model. It is difficult to argue...
Water scarcity and water-quality issues are broadly recognised and understood in most political, business and civil organisations in South Africa, but solving water issues will require wide and continuous action in catchments and municipalities by organisations and...
Work is well under way on the R212-million Imvutshane dam, 30 km north-west of Stanger, in KwaZulu-Natal, which is a key link in supplying people in rural Maphumulo with a reliable source of safe drinking water.