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Title of Session Line 1 Title of Session Line 2 Planning and Execution of a Major Light Rail Transit Tunnel Inspection Matt Baccitich Project Coordinator TriMet – MOW Operations Portland, OR Matt Harlan, PE Project Manager David Evans and Associates, Inc. Portland, OR Planning and Execution of a Major Light Rail Transit Tunnel Inspection • Robertson Tunnel Overview and Construction • Inspection Planning and Scoping • Owner Planning and Coordination • Inspection Results and Deliverables TriMet System Overview Robertson Tunnel Fast Facts Construction Details -TBM - Cut and Cover -Blasting Washington Park Station Inspection Planning and Scoping • Work backwards from project need • Establish deliverable expectations Inspection Planning and Scoping Inspection Planning and Scoping • Work backwards from project need • Establish deliverable expectations • Scale inspection effort Inspection Planning and Scoping 10001 - Cast-in-Place Tunnel Liner (SF) Drip Begin End Efflorescence/Rust Pans Delam/Spall/Patch Exposed Rebar Cracking (Liners) Distortion Leakage Station Station Staining (Qty) CS2 CS3 CS4 CS2 CS3 CS4 CS2 CS3 CS4 CS1 CS2 CS3 CS4 CS2 CS3 CS4 CS2 CS3 CS4 782+00 782+50 0 0 0 0 0 0 260 0 0 0 0 0 0 0 0 0 0 70 0 782+50 783+00 0 0 0 0 0 0 210 0 0 0 60 0 0 0 0 0 0 50 0 783+00 783+50 0 0 0 0 0 0 440 0 0 300 0 0 0 0 0 0 10 210 0 783+50 784+00 0 0 0 0 0 0 550 0 0 270 50 0 0 0 0 0 20 250 0 784+00 784+50 1 0 0 0 0 0 370 20 0 260 60 50 0 0 0 0 110 250 0 784+50 785+00 2 0 0 0 0 0 0 330 0 0 200 100 50 0 0 0 0 70 340 0 785+00 785+50 2 0 0 0 0 0 0 305 5 0 200 50 100 0 0 0 0 210 250 0 785+50 786+00 0 0 0 0 0 0 160 0 0 200 200 100 0 0 0 0 180 160 0 786+00 786+50 0 0 0 0 0 0 50 0 0 150 100 50 0 0 0 0 80 110 0 786+50 787+00 0 0 0 0 0 0 165 5 0 130 30 10 0 0 0 0 90 270 0 787+00 787+50 0 0 0 0 0 0 70 0 0 140 60 50 0 0 0 0 40 100 0 787+50 788+00 1 0 0 0 0 0 0 95 5 0 150 20 50 0 0 0 0 70 380 0 788+00 788+50 0 0 0 0 0 0 45 5 0 140 30 20 0 0 0 0 70 320 0 788+50 789+00 0 0 0 0 0 0 105 5 0 80 50 50 0 0 0 0 120 270 0 789+00 789+50 0 0 0 0 0 0 70 0 0 90 40 0 0 0 0 0 180 150 0 XP1 (789+40) 789+50 790+00 3 0 0 0 0 0 0 180 0 0 80 80 20 0 0 0 0 110 280 0 790+00 790+50 0 0 0 0 0 0 60 0 0 70 190 10 0 0 0 0 90 170 0 790+50 791+00 0 0 0 0 0 0 40 0 0 70 60 50 0 0 0 0 90 170 0 791+00 791+50 1 0 0 0 0 0 0 120 0 0 80 50 80 0 0 0 0 80 230 0 791+50 792+00 1 0 0 0 0 0 0 150 0 0 90 60 20 0 0 0 0 170 260 15 792+00 792+50 0 0 0 0 0 0 90 0 0 130 30 40 0 0 0 0 230 360 5 792+50 793+00 1 0 0 0 0 0 0 55 5 0 170 50 180 0 0 0 0 160 330 0 793+00 793+50 1 0 0 0 0 0 0 100 0 0 120 60 0 0 0 0 0 110 140 0 793+50 794+00 1 0 0 0 0 0 0 50 10 0 80 90 50 0 0 0 0 90 240 0 794+00 794+50 0 0 0 0 0 0 60 5 0 90 130 100 0 0 0 0 70 130 1 Inspection Planning and Scoping • Jointly identify areas of major risk • Schedule and coordinate early and often Owner Planning and Coordination • Impacts to operations • Customer service • Fire/life safety • On-track safety • Leveraging work zones and limited track-time Owner Planning and Coordination Work Zone Details Inspection Results and Deliverables • Present data clearly and try to evaluate trends Inspection Results and Deliverables Inspection Results and Deliverables • Present data clearly and try to evaluate trends • Clear writing – Process and Method – Observations – Conclusions – Recommendations Questions?.
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