Due to heavy rain, saturation and increase in pore water pressure caused the reduction of shear strength of the rock mass. Presence of joints caused the failure along joint plane and also by forming wedges. Due to saturation, mica schist bands acted as a
An Interim Report on Preliminary  Geological  Slope Stability Assessment of the Recent Disaster Affected Areas in Parts of Chamoli District, Uttarakhand by Bhupendra Singh, Bhupender Singh, Ajay Kumar and Arindam Roy, Senior Geologists, M-IV, NR GSI Dehr
UK_CHA_NH_ 020
BRO Chainage 468.300 km (On NH-58, d/s of Tapovan-Vishnugad powerhouse)
Removal of overhangs, shotcreting, breast wall with weep holes and lined toe drain, concrete retaining wall with foundation in in-situ rock.
Heavy precipitation leading to increased pore pressure,planar and wedge failure, saturation of mica schist bands leading to sliding down weak planes.