Rough roadbed construction on steep mountainous sections

When highway routes pass through steep mountainous sections, using lightweight soil filling methods offers the following advantages: 1. Reduces the load, decreases the sliding moment of the subgrade, enhancing its anti-slide stability; and avoids the high difficulty and cost associated with anti-slide design and construction of the subgrade.

2. Avoid stability issues caused by over-filling and the drawback of excessive land resource occupation.

Avoid the high cost of slope support and environmental damage caused by excessive excavation.