Structural damage zone mapping: a tool to delineate the slope stability of road cuts along the Mandakini River from Rudraprayag to Kund, Uttarakhand-India.

Autor: Puniya, Mohit Kumar, Kaushik, Ashish Kumar, Kumar, Sohan, Joshi, Ramesh Chander, Thakur, Om Prakash, Pant, Pitamber Dutt
Zdroj: Arabian Journal of Geosciences; Sep2021, Vol. 14 Issue 18, p1-9, 9p
Abstrakt: Hill slope stability is a major problem in the hilly region exclusively in engineering slopes along the highways. Structural damage zone mapping can be the best tool to delineate the weak zones and the vulnerable zones for the rock slope failures. Structural mapping gives better ground condition to the civil engineer for designing the appropriate slope support. In this research, a 36-km stretch has been mapped on 1:10000 scales. During structural damage zone mapping, regional tectonic structures like main central thrust (MCT)/Ukhimath Thrust, Tilwara Thrust and Bhatwari Thrust are mapped. Besides the major regional thrusts and faults, outcrop scale structural damage zones are marked with respect to the slope failure. This study reveals that slope failures are occurring at the structural damage zones. These structural damage zones are classified into shear zones, thrusts, and faults. A total of 10 structural damage zones are identified in the study area. Kinematic analysis divided these failures into planar failure, wedge failure, and toppling failure. Factor of safety (FoS) is also calculated for the investigated damage zones and shows <1 value. So, this research is focused on the structural damage zones and their relationship to the slope failures. Based on structural mapping, kinematic analysis, and FoS, all the slope failure sites or landslide locations are lying on the structural damage zones. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index