Slope Stability and Drainage Challenges in Hilly Road Construction: A Case Study of Ranchi, Jharkhand

Hilly road construction in Ranchi faces serious challenges due to steep slopes, lateritic soil, and heavy monsoon rainfall. One of the main problems is the inefficient local drainage system, which causes water accumulation along road slopes and surfaces. When rainwater is not properly drained, it infiltrates into the soil, increases pore water pressure, and reduces soil strength. This condition leads to slope instability, soil erosion, landslides, and damage to road structures. This study focuses on understanding how local drainage systems affect slope stability in hilly road sections of Ranchi. Field observations and basic soil investigations help identify problems such as blocked side drains, insufficient culverts, and poor surface runoff management. The study suggests that proper drainage planning, along with slope protection methods like vegetation cover, retaining structures, and regular maintenance, can significantly reduce these problems. Improving local drainage systems is essential for safe, durable, and sustainable road infrastructure in the hilly terrain of Ranchi'