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