Transcription of Chapter 12 Abutments
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Chapter 12 Abutments
WisDOT Bridge Manual Chapter 12 Abutments January 2018 12-1 Table of Contents General .. 3 abutment Types .. 5 Full-Retaining .. 5 Semi-Retaining .. 6 Sill .. 6 Spill-Through or Open .. 7 Pile-Encased .. 8 Special Designs .. 8 Types of abutment Support .. 9 Piles or Drilled Shafts .. 9 Spread Footings .. 10 abutment Wing Walls .. 11 Wing Wall Length .. 11 Wings Parallel to Roadway .. 11 Wings Not Parallel to Roadway and Equal Slopes .. 13 Wing Wall Loads .. 15 Wing Wall Parapets .. 16 abutment Depths, Excavation and 17 abutment Depths .. 17 abutment Excavation .. 17 abutment Drainage and Backfill .. 19 abutment Drainage .. 19 abutment Backfill Material .. 19 Selection of Standard abutment Types .. 20 abutment Design Loads and Other Parameters .. 23 Application of abutment Design Loads .. 23 Load Modifiers and Load Factors .. 26 Live Load 27 Other abutment Design Parameters .. 28 abutment and Wing Wall Design in 29 Horizontal Pile Resistance.
simplifies compaction of fill , and it improves stability. However, parallel -to-abutment-centerline wings should not be used for stream crossings when the high water elevation is above the bottom of the abutment. This wing configuration may not adequately protect bridge approaches and abutment backfill from the adjacent waterway.
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