los gatos creek bridge replacement projectand+minutes/jpb/... · 18/10/2017 · challenges iv....
TRANSCRIPT
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Los Gatos Creek Bridge Replacement Project
Oct 18. 2017
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Agenda
I. Project Description
II. Project Benefits
III. Challenges
IV. Construction Update
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Project Location Located along Caltrain line
• In the City of San Jose
• Bounded by Park Avenue to the north and Interstate 280 to the south
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Los Gatos Creek Bridge • Owned by the Peninsula Corridor Joint Powers Board
• MT1 owned by UPRR Built in 1935 Does not meet existing current seismic safety standards Has structural deficiencies Southern timber span was
damaged by fire Recent Flooding has
caused significant scour
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Project Elements • Demolish existing two-track bridge
• Replace existing bridge with three new single track bridges
Meet current safety and seismic codes Include a tail track to maintain rail operations throughout
construction
• Build a Retaining Wall Widen Creek Channel Facilitate City of San Jose future bike trail
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Project Benefits
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Project Benefits
• Safe rail operations
• Improves operations at the San Jose Diridon Station
• Addition of Tail Track
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Construction Challenges
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• Phase I • Pre June 1 Work
• Staging, fencing, temporary access roads, signal work, tail track abutment work, and retaining wall work
• Phase II – Dry Season Window • June 2017 – Aug. 2017 – Single Tracking on MT1
• Tail track bridge construction, includes bridge foundation and abutment work, pre-cast superstructure crane-in
• Aug. 2017 – Oct. 2017 – Single Tracking on Tail Track • Existing bridge demolition, new Main Track 1 & 2 bridge
construction and in-creek site mitigation • Phase II -- Post Oct 2017
• Main Track 1 & 2 track and signal work, out-of-creek site mitigation, and site clean-up.
Construction Phases
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Construction Staging -- In Creek
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Unforeseen Conditions
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Water Diversion Creek Water Diversion & Fish Relocation
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Limited Access
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Construction Status
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Progress in Field – Shoofly
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Progress in Field – MT 1 and MT2
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MT1 Bridge Construction
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Building Bents
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MT1 and MT2 Bridges
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Questions