The Construction of the Langham Place in Mong Kok – An...
Transcript of The Construction of the Langham Place in Mong Kok – An...
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The Construction of the
Langham Place in Mong Kok
– An Introduction
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Artist Impression of Langham Place
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roject
comprising
ail/hotel
compl
an
office/ret
Fast Fact
The site located in the heart of the MongkokDistrict and bounded on four sides by Argyle Street, Portland Street, Shan Tung Street and Shanghai Street, with a site area of about 12,000 square metre.
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In the project, a retail/shopping/entertainment centre of 51,000 sq. m; a Grade A office tower of 70,000 sq. m, and a 5-star Langham Place Hotel of 40,000 sq. m. comprising about 720 rooms are constructed. In addition, 6,000 sq. m. of building area are used as Government/ Institution/Community facilities including a public light bus terminus in the ground level of the hotel block.
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Total Contract sum about $3.5 billion.
Contractor: Sun Fook Kong Holdings Limited
Foundation Contract commenced in March 1999 to November 2001
Main Contract commenced in December 2001 for completion in July 2004
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External view of Langham Place at seen in November 2003
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Foundation Works in general
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Layout Plan showing the cut-off arrangement and location of bored piles
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The site as seen in 1999 before the commencement of foundation works
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The site as seen in June 2000 at the early stage of foundation construction
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Foundation Work at Site A Foundation Work at Site B
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Forming the large diameter bored pile using RCD (left) and Grab & Chisel Method
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Excavation for the diaphragm wall
Other cut-off provision using bored pile
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Construction of the Office Tower –Basement portion
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Commencement of excavation to form the raft foundation for tower block
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Provision of a work platform for the stationing of equipment and handling of spoil to facilitate the excavation process
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Detail of the lateral support frame as seen inside the excavation pit
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Construction of the basement structure using in-situ timber formwork from the foundation raft
Composite column for the tower block
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Gradual ascending of the basement structure
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Detail of the composite column
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Dewatering arrangement – well points provided around the cut-off wall
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Completion of the basement portion of the tower block up to ground level
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Construction of the Office Tower –Podium/Transfer plate
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3m thick Transfer plate on top of the super-column for redistributing of the column loading of the upper structure
Construction of entrance foyer and the transfer plate for the support of the tower block upper structure
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Slab and core wall below the transfer plate
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Construction of the Office Tower –Core Wall
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Completed climb-form ready for operation
Erection of a climb-form for the construction of the core wall starting from the transfer plate
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Panels before erected onto the main frame of the formwork system
Erection of the climb-form
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The first section of core wall was formed by the climb-form without lifting
Climb-form erected on the transfer plate ready for the first lift
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Hydraulic jack for lifting the form system
The climb-form system as seen on the platform deck level
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The climb-form system as seen under the platform deck
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Detail of the hydraulic jack that lifts the climb-form
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The external view of the climb form under routine operation
Climb-form being dismantled after the topping out of the core wall at 58/F
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Construction of the Office Tower –Floor System
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Construction of the typical floor of the office block using a table form
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Detail of the table form
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Forming of the floor in two phases
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A special climbing-type material hoist for lifting of formwork material from lower floor to the deck level
Traditional timber floor was used at a later stage
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Floor beams take shape
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Link bars provisioned in core wall for connecting the floor slab and beam afterward
The jointing of the slab to the core wall
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Construction of the Office Tower –Outrigger System
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Two sets of outrigger frames were provided on 26/F and 44/F to stiffen the superstructure
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Detail of the outrigger and the outer truss
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Connection of the outrigger member to the floor and core wall
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Encasing the outrigger frame with concrete at a later stage
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Construction of the Retail Podium –Basement
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Forming the ground floor slab as the first plate before the full-scale commencement of the basement works
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Steel columns founded on bored-pile as support for the basement structure during the top-down construction process
Forming of the ground floor slab by the support of the steel columns
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Onward development of the ground floor slab
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Muck-openning
Completion of the ground floor slab with a muck-opening temporary provided to facilitate further excavation downward
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Onward excavation worked around the muck-opening
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Onward excavation inside the basement
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Vehicular ramp
Forming the vehicular ramp at Shan Tung Street which served also as the temporary access for the removal of spoil from the basement
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Constructing the ramp in top-down manner using traditional timber formwork
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The vehicular ramp undergoing a top-down construction process at seen at the lower basement level
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Construction of the Office Tower –Other Features
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Finishing the office interior
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Building services installation
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An semi-self climbing scaffold provided as work screen on the top deck levels
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Temporary material hoist
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Roof features – provision of a steel dome at the roof of the tower block
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Construction of the Retail Podium –Podium Structure
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Commencement of the retail podium construction with floor slab supported on steel columns (the first 2 levels of podium constructed in RC slab)
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Void for an interior atrium strip
Forming the steel frame of the retail podium
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The void for the atrium
Forming the steel frame of the retail podium
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Voids as atrium spaces
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Development of the podium structure
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The framing arrangement of the podium as seen on the intermediate levels
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Detail seeing the complicated layout of the structural steel frame
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25m high atrium
Complicated interior space within the podium
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Construction of the Retail Podium –Roof and the Atrium
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a
The 30m-high Grand Atrium located on the 4-level of the retail podium
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Installing the trussed columns for the Grand Atrium
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Temporary trusses
Temporary lateral trusses erected in rows to stabilize the steel columns before the final erection of the roof trusses
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The 30m high Grand Atrium space took shape
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Grand Atrium space formed by trussed columns and a
trussed roof frame
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aSequential views to see the gradual completion of the podium (1)
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Sequential views to see the gradual completion of the podium (2)
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Sequential views to see the gradual completion of the podium (3)
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Sequential views to see the gradual completion of the podium (4)
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Laying the roof deck and the roofing layer
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Spaces inside the podium roof and atrium interior
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Spaces inside the Grand Atrium interior
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Construction of the Hotel Block
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An aerial view seeing the hotel block and the retail podium
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Roof Features
Lift core
Hotel room block
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Construction of the Hotel Block –Basement
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Commencement of the basement excavation by installing the first layer of lateral support strut frame
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Seeing the excavation inside the basement pit
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Works at the formation level
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Construction the basement from the formation level using bottom-up approach
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Forming the basement wall
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Construction of the Hotel Block –the Superstructure
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Composite columns are used up to 3/F to provide larger span at the ground level which used as a public transport facility
Construction of the podium of the hotel block
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Lift core block
Hotel compartment block
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Construction of the lift core block using a type of large-panel formwork
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Layout of the large-panel steel formwork for the construction of the load bearing walls of the hotel apartment block
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Formwork detail as seen on deck level
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Roof features
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Installation of the curtain wall
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Other Provision –
Pedestrian Tunnel crossing Shanghai Street
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Forming of a cut-off across Shanghai Street using drilled piles
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Temporary traffic diversion arrangement during the forming of the cut-off for the underground vehicular tunnel
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Temporary traffic diversion arrangement during the forming of the cut-off for the underground vehicular tunnel
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Excavate and constructing the tunnel in phases using bottom up method.
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Other Provision –
Pedestrian Footbridge crossing Shanghai Street
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Construction of two footbridges to link up the two buildings within the development
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Completion of the steel footbridges ready for the installation of glass wall
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End of presentation