SSCCCCTT AAnnnnuuaall CCoonnccrreettee SSeemiminnaarr 22000077

HiHigghh PPeerforformrmaannccee CoConnccreretete iinn

HoHonngg KKoonngg--SShheennzzhheenn WWeessteternrn CoCorrirriddoorr

2288tthh FFeebbrruuaarryy 22000077

Location Plan of HKSWCLocation Plan of HKSWC

HKSWCHKSWC

HongKongHongKong

IslandIsland

ShenzhenShenzhen

LantauLantau

IslandIsland

KowloonKowloon

ChekChekLapLapKokKok

DEEP BAYDEEP BAYSHEKOUSHEKOUSHEKOU DongjiaotouDongjiaotouDongjiaotou

Mainland ChinaMainland China

Hong Kong SAR

Lok Ma

Chau

Man Kam To

HONG KONGHONG KONG--SHENZHENSHENZHEN WESTERN CORRIDORWESTERN CORRIDOR

Total length: 5.5km (3.5km within HK waters)

DEEP BAY LINKDEEP BAY LINK

HK

SA

R B

ound

ary

Sha Tau Kok

OOvveerrvviieeww

•• FFoouurrtthh vveehhiiccuullaarr bboouunnddaarryy ccrroossssiinngg bbeettwweeeenn HHKKSSAARR

aanndd tthhee MMaaiinnllaanndd

•• TToottaall lleennggtthh :: 55..55kkmm ((DDiivviiddeedd bbyy BBoouunnddaarryy ooff HHKKSSAARR))

•• HHKKSSAARR sseeccttiioonn :: 33..55kkmm,, SShheennzzhheenn sseeccttiioonn :: 22kkmm

•• DDuuaall 33--llaannee eelleevvaatteedd ccaarrrriiaaggeewwaayy wwiitthh hhaarrdd sshhoouullddeerrss

•• CCaabbllee--SSttaayyeedd BBrriiddggee aatt nnaavviiggaattiioonn cchhaannnneell

Approach Viaduct: ElevationApproach Viaduct: Elevation && SectionSection

pier with sliding bearings and deck movement joint

pier with sliding bearings

pier monolithic with deck

Approach ViaductApproach Viaduct

210m

13 nos.

99m

74.585m

74.585m

To Hong Kong

To Shenzhen

~123m

~33m

1

5

HK

SA

R B

ound

ary

Pier 0 (Interface Pier with Mainland

Pier 1

Pier 3 (Interface Pier with Approach

Viaducts) Tower

Pier 2 (Anchor Pier)

portio n o f SWC) EElleevvaattiioonn ooff tthhee CCaabbllee--SSttaayyeedd BBrriiddggee

Computer generated perspective viewComputer generated perspective view

Counterweight

~23MN ~3.3MN Anchor Pier

Counterweigh t Unit:

• Adopt heavy aggregate to achieve min. 31.5 kN/m3

Durability Assessment

• Concrete design documents reviewed included: – BS 5400 – BS EN206 – BS 8500 – SDMHR – GEO Publication No. 1/96 ‘Pile design & construction’ – BRE SD1 ‘Concrete in aggressive ground’ – CS TR 40 ‘The use of GGBS and PFA in concrete’ – CS TR 41 ‘Microsilica in concrete’

Durability Assessment Recommendations

• Concrete bored piles and pile caps: – C45 – PF A 40% – Max . w/c ratio 0.38 – Min . cove r to rebars : 75m m for pile s and pil e cap s in

water , 50m m fo r pil e cap s fully submerged below seabed o r ground

Durability Assessment Recommendations

• Concrete piers: – C50 (C60 for Cable-Stayed Bridge tower & piers) – PFA 35% – Microsilica 8% – Max. w/c ratio 0.35 – Min. cover to rebars: 75mm for external faces (60mm

for tower external faces which have painting), 40mm for internal faces

Durability Assessment Recommendations

• Concrete deck: – C50 – PFA 35% – Microsilica 8% – Max. w/c ratio 0.35 – Min. cover to rebars: 50mm for external faces, 40mm

for internal faces

LetLet’’s now go to thes now go to the construction partconstruction part

Hong KongHong Kong--Shenzhen Western CorridorShenzhen Western Corridor