| Notable Features |
| |
 |
Construction waste
reduction/recycling program |
|
Reduced Construction waste due
to use of factory manufactured aluminium formwork panels |
|
Application of
value engineering in terms of slab and wall formwork |
|
Use of system
formwork |
|
Use of bay windows
and A/C hoods |
|
Aluminium formwork
panels were
used for casting the structural shear walls |
|
Reuse of aluminium
formwork panels |
|
V-shaped prop head
system |
| Basic
Information |
| |
|
Location: Tseung
Kwan O |
|
Site Area: 500,000
sq ft |
|
Building Type: 15
luxurious residential towers in three phases |
|
Contract Period:
750 days for phase 1 |
|
Facilities: Club
house, swimming pool, tennis court, children's play ground, car park
etc. |
|
Client: Arrowtown Assets Limited |
|
Architect: Wong
Tung & Partners Ltd. |
|
Quantity Surveyor: Davis
Langon & Seah Hong kong Ltd. |
|
Structural Engineer:
Joseph Chow & Partners Ltd. |
|
E&M
Consultant: Meinhardt (M&E) Ltd. |
|
Main Contractor: Sanfield
Building Contractors Ltd. |
|
Building costs: HK$
1600 million for phase 1 |
| Overview |
| |
|
The Tseung Kwan O TKOTL 55
development, named as Ocean Shore with a site area of over 500,000
square feet, consisted of 15 luxurious residential towers to be
constructed in 3 phases.
Following to the client's requirement,
the architect emphasized his design to capture the greenery
surrounded
either along the hillside or the lush plantation of the landscaped
podium garden. A 3 levels podium structure was therefore designed to
provide space for various facilities including the clubhouse,
swimming pool, tennis court, children's play ground, car park
etc.
It was the developer's vision
to provide the best not only the large scale master layout plan but
also the quality of the apartment to the residents lived there.
| Plastering and Finishing
|
| |
| The main
advantage of aluminium formwork was good alignment and
verticality with good concrete finish surface which minimised
the cost on plastering and finish work. High quality Aluminium Formwork
Panels ensure
consistency of dimensions. On the removal of the formwork mould, a high quality
concrete finish was produced to accurate tolerances and
verticality. The high tolerance of the finish means that no
thick plastering was required. Typically a 3mm to 4mm skim
coat was applied internally prior to finishing and a 6 mm build
up coat prior to laying
tiles. |
|
| |
|
|
| Contact
of Contractor
|
| |
| Sanfield
Building Contractors Ltd.
|
| 44/F,
Sun Hung Kai Center,
|
| 30
Harcourt Road, Wanchai,
Hong Kong.
|
| Tel:
(852) 2827 8111
|
| Fax:
(852) 2827 0717
|
|
|
|
|
|
|
|
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|
| Slab and Wall System |
| |
| It had been the
client's intention to use system formwork for
a better quality concrete finish and good alignment and verticality.
However with the complex architectural features, bay windows and A/C
hoods etc. were adopted in this project, the use of large steel panel or
precast concrete panel was not an option for the construction
in this project. |
| |
| The engineer was requested to
explore the possibility of using aluminium handset system formwork on
both technical and cost effectiveness requirements. A simple handset
aluminium formwork was finally chosen to use on
three residential blocks of phase 1 and majority of the aluminium
formwork panels will be reused on the residential blocks of phase 2. The advantages of
aluminium formwork are:
|
| |
|
Good alignment and verticality |
|
High finish
quality |
|
No tower
crane required |
|
Require
unskilled
labour force |
|
Environmental
friendly |
|
Speedy and
economical |
|
Earlier
stripping of forms |
|
| |
Timber
Formwork |
System
Formwork |
|
Material
|
Timber and Plywood
|
All
Aluminium
|
|
Durability
|
20
times
|
120-150
times
|
|
Wastage
|
Yes
|
No
|
|
Quality
|
Subject
to Workmanship
|
Good
|
|
Labour
|
Skilled
|
Unskilled
|
|
Flexibility
|
More
|
Less
|
|
Cost
|
HK$100-140/m2
|
HK$140-180/m2
|
|
| |
|
|
| Steel
Column Formwork |
| |
| Steel column
formwork was used to construct the large circular column as shown in
the figure below. |
| |
|
|
| |
| Steel forms
are very durable and can be recycled many times. Steel forms produce
a better quality concrete product. |
| |
|
|
| |
|
|
| Waste Management |
| |
|
Material control |
|
Reusable material adopted-aluminium
formwork |
|
Surplus steel bars
were stored for
reuse |
|
Job-site
recycling |
|
|
|
