Based on cross-section notes of an earthwork, what is the determined side slope ratio?

The side slope ratio is a critical aspect of earthwork design as it indicates the steepness of the slopes in relation to the vertical height. A side slope ratio is described in a format that compares the horizontal distance to the vertical drop.

In this case, a side slope ratio of 1:2 means that for every 1 unit of vertical height, the slope extends 2 units horizontally. This is a common and balanced slope ratio, often used for stability and safety in construction and roadwork. It suggests a moderate incline, which helps prevent erosion and ensures that slopes are not overly steep, thus reducing the risk of landslide or slippage.

When considering the other options for the side slope ratio, a 1:1 ratio indicates a 45-degree slope, which is quite steep and less stable. A 2:1 ratio represents a slope that is less steep than 1:1, extending 2 units horizontally for every unit of vertical rise, but it is not as gentle and safe as 1:2. A 3:1 ratio provides an even gentler slope than 2:1, often used in areas where greater stability is required, but may not be necessary when a moderate 1:2 slope suffices