hewlett packard building 5 seismic upgrade corvallis, oregon, usa tom a. armour, p.e. session iii...
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HEWLETT PACKARD HEWLETT PACKARD BUILDING 5 SEISMIC UPGRADEBUILDING 5 SEISMIC UPGRADE
CORVALLIS, OREGON, USACORVALLIS, OREGON, USA
TOM A. ARMOUR, P.E.TOM A. ARMOUR, P.E.
SESSION III SESSION III STRUCTURAL SUPPORT & STRUCTURAL SUPPORT &
SEISMIC APPLICATIONSSEISMIC APPLICATIONSIWM 2002IWM 2002
MAY 29 – JUNE 1, 2002MAY 29 – JUNE 1, 2002
PROJECT SYNOPSISPROJECT SYNOPSIS“Foundation Design & Construction”“Foundation Design & Construction”
PROJECT SYNOPSISPROJECT SYNOPSIS“Foundation Design & Construction”“Foundation Design & Construction”
Voluntary Seismic Upgrade ProgramVoluntary Seismic Upgrade Program
Braced Frame Retrofit SchemeBraced Frame Retrofit Scheme
Foundation Support RequiredFoundation Support Required
Vibration and Noise SensitivityVibration and Noise Sensitivity
Access IssuesAccess Issues
Strict Pile Deflection CriteriaStrict Pile Deflection Criteria
Micropiles Most Feasible OptionMicropiles Most Feasible Option
SUBSURFACE PROFILESUBSURFACE PROFILE“Ground Conditions”“Ground Conditions”
Soft Clayey Silt (ML)
Medium Dense Sands (SP)
Very Dense Sandy Gravels (GP)
8 m
3 m
DESIGN SUMMARYDESIGN SUMMARY“Foundation Support System”“Foundation Support System”
DESIGN SUMMARYDESIGN SUMMARY“Foundation Support System”“Foundation Support System”
Three Micropile TypesThree Micropile Types CASE 1 Type B micropilesCASE 1 Type B micropiles 135 total micropiles135 total micropiles
Seismic Design LoadsSeismic Design Loads CompressionCompression = 540 kN – 720 kN= 540 kN – 720 kN TensionTension = 450 kN – 540 kN= 450 kN – 540 kN
Deflection Criteria Deflection Criteria Verif. = 6.4 mm @ 900 kN Test Load (1.67 SDL)Verif. = 6.4 mm @ 900 kN Test Load (1.67 SDL) Proof = 3.8 mm @ 810 kN Test Load (1.5 SDL)Proof = 3.8 mm @ 810 kN Test Load (1.5 SDL)
New and Existing Pile FootingsNew and Existing Pile Footings
3 meters to Unlimited Headroom Access 3 meters to Unlimited Headroom Access
Pile Load Test ProgramPile Load Test Program One Each Verification Test to 200% SDL on Non-Production PilesOne Each Verification Test to 200% SDL on Non-Production Piles 5% Proof Tests on Production Piles 5% Proof Tests on Production Piles
TYPICAL PILE DETAILTYPICAL PILE DETAIL“H.P. Building 5”“H.P. Building 5”
10 m Casing
140 mm to 178 mm x
10.5 mm to 16 mm wall
casing
15 m Reinforcing Bar
50 mm & 63,5 mm
Plu
ng
e
Le
ng
th
Bo
nd
Z
on
e
Centralizer
Neat Cement Grout
Med. Dense Sands
MICROPILE MATERIALSMICROPILE MATERIALS“H.P. Building 5”“H.P. Building 5”
Permanent Steel PipePermanent Steel Pipe API 5CT & ASTM A252API 5CT & ASTM A252 550 MPa yield550 MPa yield Flush joint threadsFlush joint threads
Steel ReinforcementSteel Reinforcement ASTM A615ASTM A615 Mechanical couplingMechanical coupling
Cement GroutCement Grout Neat cement – ASTM C150Neat cement – ASTM C150 W/C ratio of 0.45W/C ratio of 0.45 27,6 MPa (min)27,6 MPa (min)
MICROPILE CONSTRUCTIONMICROPILE CONSTRUCTION“ H.P. Building 5”“ H.P. Building 5”
MICROPILE CONSTRUCTIONMICROPILE CONSTRUCTION“ H.P. Building 5”“ H.P. Building 5”
MICROPILE CONSTRUCTIONMICROPILE CONSTRUCTION“ H.P. Building 5”“ H.P. Building 5”
MICROPILE CONSTRUCTIONMICROPILE CONSTRUCTION“ H.P. Building 5”“ H.P. Building 5”
MICROPILE CONSTRUCTIONMICROPILE CONSTRUCTION“ H.P. Building 5”“ H.P. Building 5”
MICROPILE CONSTRUCTIONMICROPILE CONSTRUCTION“ H.P. Building 5”“ H.P. Building 5”
MICROPILE CONSTRUCTIONMICROPILE CONSTRUCTION“ H.P. Building 5”“ H.P. Building 5”
CONCLUSIONSCONCLUSIONS“H.P. Building 5 Micropiles”“H.P. Building 5 Micropiles”
Another successful Another successful
application of micropile application of micropile use for use for
seismic retrofit ofseismic retrofit of
sensitive buildings.sensitive buildings.
H.P. continuing to use H.P. continuing to use
micropiles on othermicropiles on other
building retrofits.building retrofits.