MITIGATION OF LANDSLIDE ZONE AT NH-58, LAMBAGARH

Maccaferri worked in a JV to implement slope stabilization solutions for landslide zone between Km 504.00 to Km 505.00 on NH-58. It included shifting of the existing road from its current location through construction of a flexible reinforced soil wall (RS wall) with gabions as facia (Maccaferri Terramesh® system- 3m*1m*1m and 0.5m with 2m long integrated tail) and high strength geogrid (ParaLink®) as reinforcement towards the valley side. This counteracted the destabilizing forces due to heavy hill surcharge with seepage. The height of the wall varied from 27m to 44m and length is 500m. The stones and backfill material for the wall were locally sourced hence making the solution economical with low carbon-footprint. Structure was protected from scour and boulder hit with RCC jacketing upto a depth 5m below bed level.  A rockfall embankment (using back to back Terramesh® and ParaLink® reinforcement) of 320m length and 10m height was constructed at hill side toe to protect road from direct impact of falling debris and rocks. A new flexible pavement was also constructed as part of the project.