Geology Reference
In-Depth Information
lantern spacers and then pressure grouted over their full length using
tubes installed with the nail. Soil nails are usually installed as a passive
reinforcement that would only take on load if the slope began to
deform prior to failure.
6.6.5.6 Retaining walls and barriers
Retaining walls are commonly used to support steep slopes, especially
where the slope comprises weak and broken rock and where space is
constrained. There are many different types, as illustrated in Figure 6.28.
Struts
Figure 6.28
Different types of
retaining wall.
Wall may be sheet
piles, secant piles
or diaphragm wall
Potentially
failing wedge
Shoring
Wall might be tied
back by ground
anchors or to an
anchor block set
back from the wall
Cantilevered
length
Passive
resistance in soil
Gravity wall
Must have
sufficient weight
and strength to
resist shearing,
overturning and
sliding
Gravity,
reinforced
concrete wall
Sliding resistance
Gabion wall set
against cut back slope
If a fill slope, gabion
baskets can be
connected to
horizontal reinforcing
sheets built into the fill
 
 
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