MIL-HDBK-1025/5
Bay mud and some lake-bottom materials often "fluff up" upon
d)
dredging, and will stabilize only on underwater slopes of 1 on 10 or flatter.
Waste such material outside the basin and stabilize the slopes with imported
sand.
Profile.
Figure 19(a) represents a typical beach slope profile.
2.4.2.2
(See Shore Protection Manual, Volumes I and II.)
Design Details.
2.4.2.3
Revetted Slope
2.4.3
Revetments
2.4.3.1
Where bank conditions require armoring the slopes, provide a
a)
revetment of armor stone layer or precast concrete slabs placed on a filter
course of spalls or gravel or tough, continuous fabric cloth.
Revetments are normally stable only to a steepness of about
b)
1 on 1-3/4.
Materials used are armored stone or precast concrete blocks.
c)
Armoring
2.4.3.2
Extreme wave action and currents will determine minimum stone
a)
size of a riprap or revetted slope.
Because of the strong pumping action of waves and eddy
b)
currents, armor stones shall have a normal thickness of twice the average
stone dimensions.
Filtering Devices. These are poorly graded gravel or stone filter
2.4.3.3
and continuous, tough synthetic cloth filter.
Figures 19(b), 19(c) and 19(d) represent typical revetted
Profile.
2.4.3.4
slope profiles.
(Refer to Shore Protection Manual, Volumes
Design Details.
2.4.3.5
I and II.)
Gabioned Slope
2.4.4
Use. Where adequate small-sized stone is available, rock-filled
2.4.4.1
wire mesh gabions permit installation of steep slopes for perimeter
stabilization at relatively low cost.
Construction
2.4.4.2
Heavy-duty wire mesh baskets with rectangular sides and of
a)
convenient size tailored for construction are commercially available for
shipment to site in collapsed form.
They are galvanized for freshwater use, and galvanized plus
b)
PVC-coated for saltwater use.
39
Previous Page
