Civil Engineering Reference
In-Depth Information
The retaining wall shear force diagram, presented in Fig. A.18, show the max-
imum shear force magnitude at top of the wall during last expansion cycle to be
approximately 240% larger than its counterpart found during the initial backfill
stage.
10
6 bays, L
b
= 10 ft
φ
8
= 30
o
Q
a
Q
ec1
Q
cc1
Q
ec2
Q
cc2
Q
ec3
S
c
/S
b
= 1
6
4
2
0
-3
-2
-1
0
1
2
3
4
5
Retaining Wall Shear Force, Q, kips
Fig. A.18
Retaining Wall Shear Force (Six-Bay, L
b
= 10 ft, S
c
/S
b
= 1)
The lateral earth pressure developed behind the rigid frame is shown in Fig. A.19.
The pressure magnitude developed during the latter expansion cycles is found sub-
stantially larger than its counterparts developed during the initial backfill and the
subsequent contraction cycles. The largest increase in lateral earth pressure is shown
to be distributed over nearly the top one-half of the retaining wall height.
10
6 bays, L
b
= 10 ft
φ
σ
'
a
σ
8
= 30
o
'
ec1
'
cc1
σ
S
c
/S
b
= 1
6
σ
'
ec2
σ
'
cc2
4
σ
'
ec3
2
0
0
0.2
0.4
0.6
0.8
1
1.2
'
h
, kips/ft
2
σ
Fig. A.19
Retaining Wall Earth Pressure (Six-Bay, L
b
= 10 ft, S
c
/S
b
= 1)
The end column horizontal movements, shown in Fig. A.20, indicate a relative-
ly large range of movements related to temperature change. The horizontal dis-
placement of the end column during the latter expansion cycles is nearly 4 times
larger the displacement underwent during the initial backfill stage.
