Extracted from text ... Wanted
SAICE, FUNDED BY CETA, has been carrying
out a major research campaign to determine
the number of engineers, technologists and
technicians who are operating in the civil
In the past, the SAACE and SAFCEC
headcounts were normally regarded as being
representative of the industry, but civil staff
are to be found in all levels of government,
parastatals, the supply chain, mining and
industrial, academia, home building, etc.
Few sectors or companies do not complain
of being short of experienced technical
staff. Equally, there are few companies that
escape the pleading letters from young students
begging for vac work ..
Extracted from text ... OVER THE LAST DECADE the changes in
the South African construction marketplace
have been dramatic. The impact on the
civils industry has been equally affected.
Within the civils industry sits the 'piling
contractors market'. This market sector, and
its competing contractors, has seen a huge
change over the last five years.
The number of market players, the geographic
location of contracts, project size
and type of piling required have been
extremely varied and constantly changing.
The dynamics of this growth has seen the
larger contractors moving into Africa and
chasing dollar-based contracts; the smaller
established contractors have grown in the
Extracted from text ... GIANT
THE BOY FROM FICKSBURG
'I've always wanted to go and farm when I
retire, but now that it's finally come about, I
worry because it's a tremendous change in
one's life, especially for my wife, Engela,
who's essentially a city girl. It's going to be
very challenging indeed.'
The farm in question lies in the eastern
Free State, in the Ficksburg district. It has
been in the Wagener family for nearly 70
years and Fritz was born there. While he
decided to follow a career in engineering, his
brother returned to the farm after university
to cultivate the land full ..
Extracted from text ... EARLY IN 2007, Torres Atlantico, a twintower
multi-storey office and residential
complex, will rise over Luanda's beachfront
from driven cast-in-situ piles and lateral support
installed by Franki Africa Sucursal
Angola, the Angola arm of Franki Africa
The towers, being built for Angola's three
largest oil companies - the Angolan Government
Oil Company, (or Sonangol), BP and
Exxon - will each soar 16 storeys high,
include two basements and five storeys of
parking garages, and stand as testimony to
the burgeoning oil and gas industry in that
In addition to its prominent position and
profile, the Torres Atlantico project ..
Extracted from text ... GEOLOGY
The geology of the area belongs to the Rustenburg Layered Suite of
the Bushveld Complex. According to the 1:250 000 geological map
(2526 Rustenburg) the unit present on site is the Pyramid gabbronorite.
This unit comprises gabbro, norite and anorthosite layers that
gently dip to the east. To the west and north-west of the site outcrop
hills of gabbro-norite are present (2).
At the site a typical profile comprised the following (3):
00, 0 to 01, 3 m Clay vertisol
01, 3 to 04, 1 m Completely weathered, very closely jointed very
soft rock resembling gravel; norite
Extracted from text ... HORIZONTAL DIRECTIONAL DRILLING (HDD) is a construction procedure
that has been employed internationally for some 25 years. It
describes a specific form of trenchless technology that, by definition,
enables a variety of underground ducts and pipes to be installed with
minimum disruption to the ground surface. The technique combines
the steering technology developed in the oil industry with boring
methods employed for conventional horizontal trenchless crossings. It
requires little, if any, excavation to install pipes and conduits in a
range of lengths, sizes and depths along pre-assigned vertical and horizontal
The technique has gained worldwide acceptance and is considered
Extracted from text ... SLAKING AND DISINTEGRATION in Karoo Mudstones is a well
known, extensively documented geotechnical problem, especially
when ongoing disintegration in rock cuttings results in undermining
of more resilient overlying sandstone, with concomitant crashing of
these onto the roadway. Recent investigations into continuous ravelling
and loose rock falling onto National Route N2 in the Kei Cuttings
of the Eastern Cape have resulted in innovative and cost-effective
methods of stabilising rockmass exposures susceptible to this
mode of failure.
DISINTIGRATION IN MUDROCK
One of the major engineering problems associated with the rapid
weathering of mudrock surface on exposure is when disintegrating
or slaking rock in ..
Extracted from text ... GEOLOGY
The general area of the proposed mining
development is along the eastern flank of a
major area of geological upheaval known as
the Vredefort Dome Impact site. The Vredefort
Dome was formed an estimated 2 000
million years ago when an asteroid some
10 km in diameter hit the earth close the
where the town of Vredefort is situated
today. The area is primarily underlain by
sedimentary lithologies of the Ecca Group
of the Karoo Supergroup, particularly those
associated with the Vryheid Formation.
Dolerite intrusions in the form of sills are
generally present in the upper horizons of
the Karoo ..
Extracted from text ... TRENCH SHORING
ONE OF THE MAJOR DILEMMAS on a construction
site, in particular where the work
involves excavations, is achieving optimum
production without in any way compromising
the safety of workers. Shoring a trench
or excavation in South Africa usually means
installing timber planks and props in the
excavation. This is a time-consuming process
and is extremely limiting, as it involves
working within a congested timber-propped
In Europe, the USA and Middle East, timber
shoring has, for many years now, been
replaced by prefabricated, portable and reusable
trench-shoring systems. These systems
not only vastly improve safety on construction
sites, but ..
Extracted from text ... RADAR'S EVOLUTION FROM RESEARCH
TOOL TO MAINSTREAM APPLICATIONS
Ground penetrating radar (GPR) systems
have been in use for over 30 years, most
commonly in geophysical applications, such
as mapping bedrock layers and water tables.
Because of advances in electronics and software,
GPR has rapidly evolved into a valuable
investigative tool for mainstream applications.
Today GPR is used to study, evaluate
and solve a wide range of infrastructure
problems such as locating and mapping
buried utilities; determining road layer
thickness, material characteristics and subbase
and sub-grade conditions; assessing the
magnitude and location of deterioration
inside reinforced concrete structures; and
investigating the condition ..
Extracted from text ... TERRATEST, THE GEOTECHNICAL and
environmental consulting firm established
in 1990, has undergone significant changes
in 2005. Mrs Jan Norris, who joined the
company in 1996 as a geotechnical engineer
and became a director in 2004, has now
been appointed managing director and Professor
Deneys Schreiner, formerly dean of
the Faculty of Engineering at the University
of KwaZulu-Natal, took over as head of
geotechnical engineering as from 1 March
2005. Peter Waldron, the project leader of
the very successful Schools Play-pump Programme
(which recently received the
SAACE commendation for Engineering
Excellence for projects with a value of less
that R5 million) continues ..
Extracted from text ... YGEC 2005
YOUNG GEOTECHNICAL ENGINEERS
- A CONTRADICTION IN TERMS?
A conference organised by the SAICE Geotechnical Division in
collaboration with SAIEG, GIGSA & SANIRE
13-15 June 2005
Aventura Swadini, Mpumalanga. Swadini is situated in the
Drakensberg, on the banks of the Blyde River in the Blyde River
Canyon Nature Reserve (www.aventura.co.za/swadini/swadini.htm)
HOW DO I GET THERE?
The resort is situated 35 km from Hoedspruit in
Mpumalanga and is readily accessible by car, or by plane
via Hoedspruit Airport
Tel 011-717-7031, Fax 011-339-7853
THE GEOTECHNICAL DIVISION OF SAICE has been hosting ..
Extracted from text ... Installing sheetpile cofferdam for deep liftshaft pit (Durban Point area)
Trench support for 1 800 mm dia stormwater pipe. Depth of excavation 5, 5 m (Ballito, KwaZulu-Natal)
TRENCHING AND EMBANKMENT
SUPPORT MADE EASIER AND SAFER
WORKING INSIDE DEEP TRENCHES and at the foot of steep embankments
and cuttings has now been made easier and safer with the availability of light
interlocking sheetpiles and easy-to-use excavator-mounted vibratory hammers
which both install and extract the sheetpiles.
These products have now been launched in South Africa by geotechnical
supplier Pilequip SA.
Boyd Cousins, owner of Pilequip SA, identified the need for a
shoring/trenching system ..
Extracted from text ... EXPLORING NEW AVENUES
TO MANY, LAKE MICHELLE is probably one of the most beautiful places in the
world. Set amidst Noordhoek's tranquil wetlands, this incredible lakefront
development has inspired numerous investors to create breathtakingly magnificent
homes. The R200 million residential initiative has been ongoing for
the last eight years, presenting many interesting challenges.
Lake Michelle's heart is a salt marsh lake with indigenous fauna and flora.
The area is home to over 126 species of birds and other fauna like the rare
leopard toad and an extensive variety of ducks and fish. 'Our greatest challenge
in this five phased project was ..
Extracted from text ... ROCKFALL PROTECTION
ROCKFALL PROTECTION SYSTEMS ARE A KEY ELEMENT in the design and
maintenance of infrastructure networks and have a direct impact on safety.
The word 'system' correctly embraces the different structural components
that should be considered when taking on a problem of this kind.
A key distinction should be made between active and passive protection
systems. Passive systems do not affect the process of the rock detaching, but
focus, rather, on containing falling debris, thereby averting danger to the
infrastructure and its users. These systems include drapery wire mesh, rockfall
ERING ? APRIL 2005 31
protection barriers, and rockfall protection ..
Extracted from text ... MAINTENANCE CONTRACT FOR
AFRICA'S GIANT EYE AWARDED
THE SOUTH AFRICAN ASTRONOMICAL OBSERVATORY (SAAO) has chosen
ApplyIT's Aurora-Maintenance software to manage the maintenance of the
Southern African Large Telescope (SALT) which, once complete in July 2005,
will be the largest single optical telescope in the southern hemisphere.
Also known as Africa's giant eye, SALT is under construction in Sutherland
in the Karoo, the SAAO's main astronomical observation site renowned for its
clear weather and dark, cloud-free, unpolluted skies. The US$30 million telescope
is a modified version of the Hobby-Eberly telescope in Texas. It is
owned by the SALT Foundation, an international consortium ..