Table 2 Road cut slope excavation guidelines (DoR 2003)
From: Sustainable rural infrastructure: guidelines for roadside slope excavation
Soil classification | Cut slope (H:V) | |||
|---|---|---|---|---|
For < 5 m cut height | For 5–10 m cut height | For 10–15 m cut height | ||
Sand | Loose, poorly graded | 1:1.5 | ||
Sandy soil | Dense or well graded | 1:0.8–1:1 | 1:1–1:1.2 | – |
Loose | 1:1–1:1.2 | 1:1.2–1:1.5 | – | |
Sandy soil, mixed with gravel or rock | Dense or well graded | 1:0.8–1.1 | 1:1–1:1.2 | |
Loose, poorly graded | 1:1–1:1.2 | 1:1–1:1.2 | ||
Cohesive soil | 1:0.8–1:1.2 | - | ||
Cohesive soil mixed with rock or cobbles | 1:1–1:1.2 | 1:1.2–1:1.5 | - | |