Safety
Hard Hat, Safety Vest, Glasses-Goggles, Safety Boots, and Flashlight
What is the general PPE to enter the roadway?
Visual, Physical
What are Two basic inspection procedures?
Guideline and general requirements for tunnel inspection.
What is TOMIE?
A Structure built on the end to support lateral pressure of a span
What is an Abutment?
Precast Slabs with two vertical stems
What are Double Tees?
On firm ground, Facing it, and Three Points of Contact.
What is Ladder safety
The act of splitting or separating a laminate or solid into layers.
What is Delamination?
Have ID number, vertical drop, and horizontal run
What is stand-pipe identification plate?
Constitutes Deck Slab, Girders, Trusses, Box Beams, ect…, supports deck and components
What is a Superstructure?
Generally used at the perimeter to support Double Tees, transfer loads to Columns
What are Spandrel Beams?
A concern with on-track safety, Can be issued by any roadway worker.
What is good faith challenge?
A swelling reaction that occurs over time in concrete between the highly alkaline cement paste and the reactive non-crystalline (amorphous)silica found in many common aggregates (Concrete Cancer)
What is Alkali-Silica Reaction (ASR)?
Tunnel design with a relatively flat floor to permit a wider tracked vehicles, Located in earth or rock. Cast in place reinforced concrete.
What is horseshoe shaped tunnel?
Force that causes parts to slide past one another in opposite direction
What is Shear?
Supports Double Tees, spanning between columns or walls
What are Inverted Tees Beams?
Large enough to enter, Has limited means for entry-exit, Not designed for continuous occupancy.
What is Confined space?
A hands-on inspection of all exposed parts of the structure to assess and record its physical condition and to ensure it is adequate to safely carry intended loads
What is an In-depth Inspection?
Used to hold back water while performing under water construction.
What is a cofferdam?
Consists of an assembly of triangles.Every bar experiencies either a pushing or pulling force
What is a Truss Bridge
Supports Spandrel Beams or Inverted Tees
What are Columns?
Any additional hazards (Potential air or atmospheric hazards) of the confined space
What changes a confined space non-permit to permit?
The result of water entering concrete and forces the surface to peel, pop-out, or flake off.
What is spalling?
Exterior has a coating chemical-cured epoxy, interior coating has a silicate coating, joints are not water proof and have pressure grout, metallic lead grout caulking on interior of joints
What is Steel Segment Tunnel Liner?
The middle third of the member, and when spans are continuous, the end fourths of members at intermediate supports
What are High Moment Regions?
Provided to resist lateral loads, such as wind and seismic forces
What are Shear Walls?