S S C C C CT T A A n n n n u u a al l C C o o n n c c r r e e t te e S S e e mi mi n n a ar r 2 2 0 0 0 07 7 Hi Hi g gh h P P e e rfo rfo rm rm a a n n c ce e Co Co n n c c re rete te i in n Ho Ho n ng g K K o o n n g g - - S S h h e e n n z z h h e en n W W e e s s te tern rn Co Co rri rri d d o or r 2 2 8 8 t th h F F e e b b r r u u a a r ry y 2 2 0 0 0 07 7
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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
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