New Abu Dhabi Airport Terminal Takes Off - page 5 of 6 - continued
By Any Scale, a Massive Project
Talking about the scale of the construction, Project Director Adrian Brown from L&T, said:
The new Abu Dhabi International Midfield Airport Terminal building is a massive project, with a number of different construction phases. The engineering design and support that RMD Kwikform has supplied was absolutely vital in helping us to achieve some of the more complex engineering structures needed within the airport.
PERI Hong Kong is the other formwork company heavily involved in the project with the delivery of enormous amounts of materials at short notice as well as competent engineering for the related formwork and scaffolding planning.
Fast and efficient provision of system equipment
The ambitious terminal project is the ultimate construction site with thousand of workers working in shifts around the clock. At peak times, this increases to almost 17,000 site personnel. This is because more than 1,000m³ of concrete must be formed every day.
In order to comply with the short construction period, PERI is designing as well as supplying some of the formwork and scaffolding systems.
At present, around 6,200 slab tables are in continuous use on the construction sites as only 18 months have been earmarked for realizing the shell of the Central Processor. The PERI on-site formwork provision amount to almost 65,000 m².
Within a very short time, over 60,000 robust stacking frames of the PD 8 shoring system were delivered to the jobsite.
Beams and floor slabs in one pour
The massive, mostly 0.85 m wide and 1.10 m high beams were constructed together with the slabs in one pour. The 6 m to 10 m high PD 8 slab tables serve as the supporting structure which can be moved manually to the next section each time by means of a transportation trolley without the use of a crane.
Based on the 1.50 m frame width of the PD 8 shoring system, the standard table width for this particular project is 2.65 m. With the help of appropriately-sized diagonal braces for bay lengths between 1.25 m and 3.50 m, the table lengths can vary according to project requirements; in Abu Dhabi, slab tables mostly with 2.65 m widths and 3.60 m lengths are in continuous use.
As side formwork for the beams, mainly 75 cm wide, horizontally-positioned LIWA formwork elements are being used. One big advantage of the LIWA wall formwork system is the extremely low weight of the individual panels. As a result, striking by hand in particular is considerably simplified thus accelerating construction site procedures.
In addition to the cost-effective slab formwork concept for the floor areas, PERI engineers developed a comprehensive formwork solution for walls and columns.
For realizing the total of 4,000 massive, reinforced concrete columns with 1.00 m to 2.50 m edge lengths – resulting in a wide range of dimensions – the construction crew used VARIO GT 24 column formwork and project-related SRS circular column formwork elements.
Furthermore, the up to 12.50 m high reinforced concrete walls were formed with the VARIO GT 24 girder wall formwork system.
Specialist roofing structural engineer and contractor, Robert Bird Group (RBG) has a significant role in the construction of Abu Dhabi International Airport’s new Midfield Terminal Building Central Processor Roof (CPR).
The CPR consists of two main geometrically complex structural elements – the 18 supporting arches and backstays trusses providing gravity and lateral resisting system and the overlying roof grillage.
The 18 inclined arch trusses span up to 180 m and 50 m high supporting the overlying roof grillage.
The arches are arranged in inclined pairs along the length of the building, however each arch has a different span and the opposing arches are not directly connected.