G8-9 Flashcards
Deep foundations may have what?
piles or caissons going down into bedrock for support
What are bearing piles?
wooden, steel, or concrete piles that extend down to bedrock that increase the ability to stabilize and support a structure
Bearing piles are usually driven in?
groupings
what is between the bearing pile and the grade beam?
Pile cap
Bearing piles are driven down to it hits what?
Point of Refusal, witch measures the resistance experienced by the pile driving equipment. An engineer will specify the Point of Refuasl
a measure for wooden pile straightness is called?
the pile sweep
Friction piles are what?
Piles that transfer a vertical load to the soil around the pile (skin friction)
What species of wood is preferred for wood piles?
Pine or Western Red Cedar treated with creosote or other preservatives
what is the swell?
It is the displacement of the soil around pile that causes this. causes a mound
Name the parts of the pile top down.
Driving ring Head Butt Pile cut off line Foot Tip Pile shoe
What can be used to drive piles in sandy locations?
High pressure water forced down the centre of the pile pushing the sand back up and driving the pile
what is constructed first in tilt up construction?
The main floor slab and footings
The main floor slab must be?
Very strong to withstand a walking crane
what is used for bracing a tilt up form panel?
telescoping steel pipe braces
How are the panels bolted together?
with steel angle iron
What are the joints between panels filled with?
backer rod or rubber insert and caulking
what does it mean too walk the panel?
requires the crane to move while carrying the panel
How far down from the top of the floor slab, should the bottom of the panel be?
at least 12 inches
what is placed between the footing and panel?
Grout Pad
what is used to connect the infill concrete to the wall panel?
L shape Reinforcing bars
what is the tolerance for a grout pad?
very small plus or minus 0.5mm
how far back is the slab kept back from the footing?
4-6 feet
what are the type of forms used to cast pre cast wall panels?
Edge Forms