Quentin L Seven Mile Dam Anchors Presentation
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Transcript of Quentin L Seven Mile Dam Anchors Presentation
2004 ! PETER KIEWIT SONS CO ! 48th ANNUAL WESTERN CANADA DISTRICT MEETING
Seven Mile Dam Phase II Anchors
Quentin Luey
Presentation Outline § The Estimate § Scope of Work § Major Operations § Conclusions
The Estimate § Kiewit - $12,944,950.00 § Haywood Baker - $16,448,330.00 § Walter - $18,264,720.00 § Graham - $18,345,000.00
Estimator District QC
The Largest Anchors in the World
Scope: § Fabrication / installation / post tensioning of 48 strand
anchors. § Each anchor made of 92 strands with a GUTS of 5.4
million pounds § During construction owner adds 6 more anchors
increasing contract value to $14,700,000
Major Operations § Demolition of anchor blockouts § Drilling for the anchors § Anchor Fabrication § Anchor Grouting § Anchor Stressing
Demolition
Budget = $1040 / yd3
Actual = $985 / yd3
Drilling
Budget = $65 / ft
Actual = $58 / ft
M13 Autoshot Survey Tool § Specifications called for a
1:300 alignment § After 54 drill holes the average
accuracy achieved was 1:450 § The best result achieved was
1:2200 § Software included with the tool
produces a 3-D image of the actual travel of the drill hole
8� 410�
1:600
Corrosion Protection
The Anchor
Bond zone
Bare steel strand
No wax or sheathing
Holds anchor in the ground
Free stress length
Steel strand coated in wax and HDPE
Elongation occurs in this section
Anchor Fabrication Yard
Budget = $69 / strand Actual = $48 / strand
Anchor Fabrication
Right way
Wrong Way
Anchor Installation
Dinosaur
Budget = $1755 / install Actual = $1340 / install
Anchor Grouting § Grout was mixture of Type 10
cement and water with a W / C ratio of 0.45
§ Absolutely no admixtures allowed
§ Anchor is grouted on the inside and outside of the sheathing simultaneously
Anchor Stressing Average Elongation = 24�
Conclusions § Significance § People Involved
Club Seven Mile