Soils test Flashcards
1
Q
aquifier
A
readily tranmits water (gravel, stone, gravel)
2
Q
Aquitard
A
Doesn’t readily tranmit water (low permability clay, unfractured rock)
3
Q
what does a piezometer do
A
Locate water table
4
Q
what is i in darcys law
A
Change in head/ length
5
Q
time = distance / velocity*(nc)
A
nc = e/(e+1)
E is permatbility
nc is void ration
6
Q
F.S. = ?
A
Helping you/ hurting you
shear strength/shear stress
weight of building/uplift pressure
7
Q
how to find permability
A
Lab tests, correlation with other soil properites, field test
8
Q
Types of dams
A
- Concrete arch (support by rock walls)
- Concrete gravity
- Concrete gravity arch (hoover dam)
- Earth wall
- Rollar compacted concrete
9
Q
Design issues with dams
A
- Dam height, spillway size
- Concrete size/rebar
- Seepage, piping, soil slopes
10
Q
plot sigma 1 and sigma 3
A
sigma 1 = sigma d +sigma 3
11
Q
Unconfined compression test
A
q = p/A
c= q/2
12
Q
how to find friction and cohesion
A
- Lab tests
- Soil boring with SPT
- correlation with other soil properties
13
Q
Types of levees (flood control)
A
- slopes and embankments
- retaining walls
- founation
