Road Cutting Stability And the walls came tumbling down. (Def Lepard, 1982) D.Turner March 2002.
12
Road Cutting Stability Road Cutting Stability And the walls came tumbling down. (Def Lepard, 1982) D.Turner March 2002
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Gabion walls
Transcript of Road Cutting Stability And the walls came tumbling down. (Def Lepard, 1982) D.Turner March 2002.
Road Cutting StabilityRoad Cutting Stability
And the walls came tumbling down. (Def Lepard, 1982) D.Turner March 2002
West portal of the Penmaenmawr A55 Road tunnel, N.Wales
West portal
scree
rhyolite
Gabion walls
Shotcrete( sprayed concrete )
Pattern bolting
rock anchors steeply
dipping beds
Cross-section
Rock
anchors
dental masonry
Wire nettingWhy use this
rather than rock anchors?
• free face composed of shales and minor sandstones
• soft, friable shales difficult to support with single anchor point
• netting anchored to harder, more competent sandstone units
Concrete Sea Wall at Robin Hood’s Bay
Retaining & rock-fall
walls
Pattern bolting
scree slope
Concrete tunnel
liningRoadside rock-
fall barrier
View of west portal
Unsupported limestone beds dipping steeply
towards the road
Vassaliki, Greece
