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CONSTRUCTION WORLD
MAY
2015
PROJECT PROFILE
CSV also imported silent-type six-inch,
high volume, high lift water pumps from
the company BBA in Holland, specifically
when it has to work in residential areas with
high volumes of ground water that needs to
be pumped.
Health and safety
On a project of this nature with excavations
up to 8 m deep and the pipes to be installed
weighing in excess of seven tons while huge
machines move up and down throughout the
construction site, health and safety (H&S) is
always a big challenge and therefore remains
a priority. The project route also runs next to
one of Cape Town’s busiest roads which add
to the complexity of traffic accommodation
for the duration of the project.
For this reason a permanent on-site
Safety, Health, Environment and Quality
(SHEQ) Officer has been appointed to keep
H&S up to standard. The SHEQ Officer regu-
larly reports back on health and safety
matters during the project meetings. Every
visitor to the site has to undergo a site induc-
tion session before being allowed to come
onsite accompanied by a senior project staff
member. Being midway through the project,
CSV has only had some minor injuries and no
serious accidents.
Quantifiable time, cost
and quality
The original duration of this project is 78
weeks. With 63% of time lapsed, CSV has
been granted a total of 126 days extension.
which is mainly due to adverse physical
conditions and also due to changes in scope
of work for working in such close proximity
to the sensitive group of 132 kV electrical
cables. Chances are good that more exten-
sion of time will be granted because of many
unknowns and difficult working conditions.
The value of the contract is R139 078 382
(excluding VAT). With all the unknowns, costs
can get out of hand if not properly managed.
For this reason CSV have a permanent Quan-
tity Surveyor (QS) on site to ensure tight
control over the project budget in terms of
costing and forecasting.
CSV has a very strict quality assurance
policy on the project with every step of the
construction process checked and signed
off by both representatives from both the
contractor as well as the consultants. All of
this is well documented and filed accordingly.
Risk management
A full and complete risk assessment was done
before the start of the project and safety
measures were put in place to mitigate these
risks. With the type of ground conditions in
general and the high water table encoun-
tered on site during the winter months
the risk assessment couldn’t stop there.
The risk assessment is an ongoing process
along with the implementation of safety
measures which CSV adjusts as the environ-
ment dictates.
Method statements complete with job
specific risk assessments are prepared
upfront for all major work activities to
ensure safe work practices.
Motivating facts about the
project
Cape Town has not experienced a new sewer
pipe construction project of this magnitude
and especially at this depth in the last few
decades. It is also the first time ever that
a pipe installation of this size, length and
depth of excavation is being done making
use of our method of a ‘forward rolling’ steel
shoring system. The deployment of CSV’s
specialised shoring system has worked well
to date and is demonstrating to clients that
methods less disruptive and costly than the
conventional open cut method are feasible
and available.
The use of the silent piling technique
is not only a first for South Africa, but also
a first for the African continent. The two
silent piling rigs operating in CSV’s fleet are
the only ones of its kind in Africa. The tech-
nology involved in silent piling is ground-
breaking and is providing options, previ-
ously not available to engineers wanting or
having to construct underground services in
close proximity to sensitive infrastructure,
heritage sites and sensitive buildings.
Sheet piles installed with silent pilers.
Installation of 1 650 diameter concrete pipe
while checking line and level.
Project information
• Project start date: 7 May 2013
• Project end date: 15 June 2015
• Client: City of Cape Town
• Project team: City of Cape
Town, AECOM and
CSV Construction
• Main contractor: CSV
Construction
• Project manager: City of
Cape Town
• Consulting engineer: AECOM
• Project value: R139 078 382
(excluding VAT)
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