Deep Foundation of Towers
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Transcript of Deep Foundation of Towers
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7/31/2019 Deep Foundation of Towers
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MTRCL KOWLOON STATION DEVELOPMENT PACKAGE 7, KIL 11080
Design & Construction of Frict ion FoundationDiaphragm Wall, Shaft Grouted Barrettes
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Trial barrettes
Secondary DW panel
Primary DW panel
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Primary DW panel
SCOPE OF WORKS:
Design and Construction of:
- Circular shaft 76m diameter, using DiaphragmWall 1.5m thick, 70m deep.
- 287 shaft grouted barrettes 1m and 1.5m thick andup to 105m deep.
- Perimeter composite retaining wall (sheetpiles and
slurry wall), 10,500m of slurry cut-off wall.- Pumping test, instrumentation and monitoring
including monitoring of the adjacent MTR tunnel
and structures.
- 5 preliminary barrettes and 5 loading tests, 4000 Teach, to check out and confirm the design
parameters.
Design of the raft (76m diameter, 8m thick)
Construction Period : February 2002 to March 2003
MAIN QUANTITIES
Excavation : 90,252 m
Concrete : 80,600 m
Steel : 7,687 T
Shaft Grouting : 159,000 m
Cut-off Wall : 10,500m
The site is located within the West Kowloon reclamation nearby the existing MTRC Kowloon Station.
Foundation for a prestigious project, one of the tallest towers in the
world, 100m deep barrettes for around 500m tall building.
Due to the variable level, to the excessive depth and to the uncertain
grading of the rock, the shaft grouted friction barrettes were
adopted as the foundation system. Barrettes are located within a
76m diameter circular shaft. The shaft is designed for four level
basement and 25m deep excavation.
Before the commencement of the actual works, an extensive testing
programme took place on 5 preliminary barrettes in order to check
and confirm the design parameters.
Beside the difficult soil conditions, the main challenger was the
programme of the works. Three reverse circulation excavation
machines and a maximum of labour and staff have been mobilizedfor a successful completion of the works.
From design
to construction
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7/31/2019 Deep Foundation of Towers
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MTRCL KOWLOON STATION DEVELOPMENT PACKAGE 7, KIL 11080
Design & Construction of Frict ion FoundationDiaphragm Wall, Shaft Grouted Barrettes
CLIENT :Sun Hung Kai Properties Ltd.
ENGINEER :Ove Arup & Partners HK Ltd.
MAIN CONTRACTOR :BSG-INTRAFOR Joint Venture
HEADQUARTERS
REGIONAL OFFICES
Asia & PacificVSL-Intrafor Asia,
Hong KongPhone: +852 2590 2288
Fax: +852 2590 0290
Central East Europe, Middle East,France & French Speaking
Countries, AfricaVSL France
FrancePhone: +33 1 39 44 85 85
Fax: +33 1 39 44 85 86
Iberian Peninsula, South Africaand Latin America
CTT StrongholdSpain
Phone: +34 93 289 23 30Fax: +34 93 289 23 31
www.vsl-intl.com
VSL International AGSwitzerland
Phone: +41 32 613 30 30Fax: +41 32 613 30 55
Preliminary
Static Load Test
4000T
Shaft Grouting
Cement grout is injected at high
pressure in order to enhance thefriction at the interface concrete/soil.