Civil Engineering Reference
In-Depth Information
Figure 20.15
Trench supported by propped sheet piles.
the page, placed so that the piles do not rotate. The trench is part filled with water as
shown.
For undrained loading a suitable Coulomb wedge is formed by a single slip plane at
45
◦
to the horizontal and Fig. 20.16(a) shows the forces on the wedge. The magnitudes
of the known forces are
V
=
qH
=
80
×
5
=
400 kN
1
2
γ
H
2
1
2
×
5
2
W
=
=
20
×
=
250 kN
√
2
Hs
u
√
2
T
=
=
×
5
×
40
=
283 kN
S
w
=
s
u
H
=
20
×
5
=
100 kN
w
H
w
=
4
2
1
2
1
2
P
w
=
γ
×
10
×
=
80 kN
Figure 20.16
Forces on sheet piles in Figure 20.15 for undrained loading.
