of the slab and beams construction sequencing, optimising
the construction cycle for the project.
Commenting on the challenges, Carillion Alawi project
manager, Mohamed Tariq said:
“With the top of the dome needing shoring
support at a total height of 43 metres and
numerous concrete slabs at different levels
making up the new mosque, the key challenge
for us was how to manage the safe erection
of the shoring.”
“Critically we also had to be conscious
of the distribution of loads throughout the
project, to keep within the allowable work-
ing load of the RMD Kwikform equipment.
Having worked with RMD Kwikform on numerous oth-
er projects in Oman, including the Wave retail centre in
Muscat, where the contractor also used Alshor Plus, they
were familiar with the high leg load capabilities of the prod-
uct. So for the initial sequencing of the project they opted
for this solution.
With both Alshor Plus and Rapidshor being modular
systems, the Carillion Alawi site teams were able to quickly
erect the tower structures safely, bringing forward the
concreting element of the programme to meet the needs
of the overall advanced programme time.
As part of the revised design of the structure and con-
struction sequencing, that included additional monolithic
slabs, which had to be poured at the same time, RMD
Kwikform engineers had to install additional equipment
without restricting access.
Commenting on revised design and the project RMD
Kwikform regional sales manager, Bellphine Campbell said:
“With the changes made part way through
the project, having calculated all of the
loadings, we knew we could not release
the loads in the Alshor Plus to strike these
additional slabs. We therefore introduced a
900mm wide run of Rapidshor shoring that
sat within the Alshor Plus birdcage support
to distribute the loads and keep both systems
within their loading capacities.
“In doing so, we also recognised the need
to increase the size of the working platform,
so we designed additional bays using Alshor
Plus. To reach the 42 metre top height of the
dome structure, we literally put shoring, on
top of shoring, on top of shoring.
With different segments of the structure requiring dif-
ferent shoring setups, like the two level slabs next to the
prayer hall, the shoring puzzle required a great deal of en-
gineering. Rapidshor shoring, reaching a height of 17m
to the top of the dome was arranged at varying heights
and the systems jacks were adjusted to support the curved
structure of the dome.
The Rapidshor shoring was found-
ed on top of an Alshor Plus birdcage,
a staggering 25 metres high, erected
from the main 5.5 metre slab. In total
this created a record-breaking tower
for RMD Kwikform, some 42 metres
Due to be completed in 2015, the
new Sultan Qaboos Mosque will be
one of the largest in Oman.
Contractors World International Vol 5 No 5
Carillion Alaw implement strict
health and safety proceedures
on site. The workers are
trained in the correct handling
and assembly of shoring
tower components. Hardhats,
gloves, protective boots and
high-viz jackets are manadatory
- even though the temperature
can get very high.