The Pheri slide of Uttarkashi was triggered due to heavy rainfall. Due to insistent rain the jointed rock mass & overburden covered steep slope got saturated and the already disturbed toe of the slope during road widening operation failed down. Although
Interim Report on Preliminary Slope Stability assessment of the recent disaster affected areas of Uttarkashi district, Uttarakhand by D.P.Dangwal, Sr.Geol., Neetu Chauhan, Mayukhee & T. Ghosh, Geologists, M-IV, NR, Dehradun, (LHZ/NR/UPUK/2013/053)
National Highway at risk
UK_UTT_NH134_ L40
NH-134, Pheri slide
Construction of retaining and breast wall with weep holes, lined toe drain, bio degradable treatment like geo jute/geo textile
Wedge failure, oversaturation of material, steep slope, reduction in shear strength