Current Topic of Steel Piles for Marine Structures
Osamu KIYOMIYAProf. Waseda University,Tokyo
TopicsOutline of steel pileApplication for marine StructuresTokyo International Offshore AirportTokyo Port Bay ridge
Domestic demand for Steel pipe piles
0. 6million tf/year
500600700
1000
0100200300400500
Year
00 01 02 03 04 05 06 07Port&Harbor
Application fields of steel piles
Diameter & length of piles
Fabricapable dimension of piles for SKK490
Thickness(mm)
Diameter(mm)
Fabrication methods of spiral pipe
UOE pipe by press & welding
U letter press O letter press
Pile jointsfor vertical direction
Mortal injection for joint partfor water tightness & strength
Welding joint for horizontal direction
Mechanical joint for horizontal direction
Pile driving method(vibro & hammer)
Vibrotary pile driver :Low noise driven by hydraulic, diesel hammer & drop
Installation method by center bored
Cemented soil at toe
Screw pile rotated method
125 years ago: pier foundation today: application for various foundations
Types of marine structure
Pile foundation
PierBridge foundationSea berthJacket type revetment, breakwater
Gravity type Break water caissonGravity type Break water caissonRevetment
Floating type PontoonFloating bridgeFloating break water
Embedded type
Undersea tunnelPipeline
Steel port facilitiessheet pile revetment
Self-supporting type steel sheet pile revetment
Sheet pile revetment with batter anchor pile
Anchorage type revetment
Wharf with piles
Wharf with Batter PilesWharf with Vertical Piles
Container berth at Tokyo Bay
Construction of jacket type pier
stainless steel protection for corrosion
0.4-1.5mmYUS
Sea Berth
Pile structure
Curtain type breakwater
Breakwater with slant panel type
Curtain type breakwater
Tokyo International Airport
D-runway is under construction
Construction of pier part
in May 2008
In
Pier structure (Jacket)
Slab
Pile
Jacket
Area 50 ha:198units ,weight 1300tf,maximum thickness 75mm
Specification and Steel Volume
Specification Volume
Jackets 45mx63mx32m(height) 198 unitsSteel girders BH2500,BH2000,BH700 160,000tfSteel girders BH2500,BH2000,BH700 160,000tfSubstructureLeg
16001960Brace7001422
490,000tf
Foundation pile
16001422.5 x8590m1320.
81,165 piles90,000tf
Assembly of a jacket unit
Fabrication accuracy 15-20mm
Design model of jacket for 9unitsordinary condition by F.E.M.
Design model of stress concentration at a pile head for temperature change
Stress distribution75mm maximum thickness
Vibro-hammer and 1600tf pile-drive berge
Work accuracy 100mm: Laser distance meter
Installation of a jacket to piles
Crane is re-built for airplane flight limitation
Installation of jackets
Piles covered stainless steel
=0.4mm for 100years
Joint part between pier and reclamation by steel sheet piles
Double steel sheet pile wall
Steel pipe driving work
Construction of revetment
Corrosion protection of steel for a designed 100-year service life
Slab1a titanium cover plate system for girder2a dehumidifier system for the enclosed
girder-inside sectiongirder-inside sectionPile3 seawater-resistant stainless steel
sheathing for pile in air cathodic protection for pile in water
a dehumidifier system for the enclosed girder-inside section
Titanium protection panelcirculation fans, air-supply ducts,Allowable humidity is within 50%
Construction of PC slabs
Tokyo Port Bay Bridge (tentative name)
Construction site
3rd navigation channel
Waste reclaimed land
Man-made island
channel
Determination of bridge scale
Total length :1618m
Characteristics of foundation design
Steel pipe sheet pile foundation
Large diameter of 1500mm,
Shearing resistance of pile vertical joint
Thick soft layer to about -80m
Purpose of field test To know bearing & friction force with 1500mm
pile with open end for gravel layer & hard sand soil
To compare with design value & to modify it
Field investigation of pile bearing capacity for large diameter pile
Static axial compressive loading test
Hydraulic jack
Impact (rapid) loading test
Counter weightabsorber
pile
Gas expansionstone
Steel pipe sheet pile foundationPier
Pile driving by hammer
Inside excavation
Main pier on the foundation
Summary for steel pipe for marine structures
1.High strength for earthquake resistance 2.Excellent workability3.Rapid construction term3.Rapid construction term4.Large bearing capacity & horizontal reaction5.Advanced anticorrosion technology
Top Related