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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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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

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.