Chapter 11 Slope Stabilization and Stability of Cuts
Chapter 11 Slope Stabilization and Stability of Cuts
Chapter 11 Slope Stabilization and Stability of Cuts
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e <strong>11</strong>.2 <strong>11</strong>.2 Fill slope design options<br />
a. Typical Fill<br />
Slash<br />
b. Benched <strong>Slope</strong> Fill with<br />
Layer Placement<br />
Slash<br />
c. Reinforced Fill<br />
Typically place fill on<br />
a 2:1 or flatter slope.<br />
Note: When possible, use a 2:1<br />
or flatter fill slope to promote<br />
revegetation.<br />
Reinforced fills are used on<br />
steep ground as an<br />
alternative to retaining<br />
structures. The 1:1 (Oversteep)<br />
face usually requires<br />
stabilization.<br />
d. Through Fill<br />
Note: Side-cast fill material<br />
only on gentle slopes, away<br />
from streams.<br />
1 1/2:1 Typical<br />
Long fill<br />
slope<br />
2:1<br />
Road<br />
Scarify <strong>and</strong> remove<br />
organic material<br />
Road<br />
Drain<br />
Natural ground<br />
Road<br />
On ground where slopes exceed 40 - 45%, construct<br />
benches +/- 3 m wide or wide enough<br />
for excavation <strong>and</strong> compaction equipment.<br />
1:1<br />
Road<br />
Geogrid or geotextile<br />
reinforcement layers<br />
3:1<br />
0-40%<br />
Ground slope<br />
Typically<br />
60% +<br />
40-60%<br />
Fill material placed in layers . Use<br />
lifts 15-30 cm thick. Compact to<br />
specified density or wheel roll<br />
each layer.<br />
Short fill<br />
slope<br />
0-40%<br />
LOW-VOLUME ROADS BMPS: 107
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