Hill slope stability examination along Lower Tons valley, Garhwal Himalayas, India
| Autor: | Vishnu Himanshu Ratnam Pandey, Prashant Kumar Champati Ray, Mukesh Singh, P. K. Singh, Ashutosh Kainthola, Vikram Sharma, Abhishek Srivastav, Tripti Jayal, Trilok Singh |
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| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
0211 other engineering and technologies 02 engineering and technology Pseudo static gis Environmental technology. Sanitary engineering 01 natural sciences Slope stability GE1-350 TD1-1066 021101 geological & geomatics engineering 0105 earth and related environmental sciences General Environmental Science Hydrology River valley Environmental sciences slope stability HD61 Remote sensing (archaeology) numerical simulation garhwal himalaya General Earth and Planetary Sciences pseudo-static Risk in industry. Risk management tons valley Geology |
| Zdroj: | Geomatics, Natural Hazards & Risk, Vol 12, Iss 1, Pp 900-921 (2021) |
| ISSN: | 1947-5713 1947-5705 |
| Popis: | The present research details the remote sensing, geotechnical and seismic aspects of hill slopes in Lower Tons river valley, Garhwal Himalaya, India. The region is a part of Lesser Himalaya and holds religious and strategic importance. The studied span has been a site of slope failures in the past. The remote sensing investigation was used to characterize the geomorphological and hydrological attributes of the area. This information was used to delineate vulnerable locations. Along the road stretch of about 80 km, 80 tests were conducted to ascertain the soil particle distribution and plasticity indices; and 33 tests for shear strength properties. Using the geotechnical parameters, numerical simulation was conducted for two slopes of angle, 40° and 50°, with a consistent height of 50 m. Most of the slopes were stable at an angle of 40°, however, 30.30% (FEM) and 24.24% (FDM) of the analysed slopes failed for the steeper slope. Eventually, the pseudo-static analysis was done. The inclusion of seismicity increased the incidences of slope failure by 33.33% and 39.39% for the slope with an inclination of 40° and 50°, respectively. Afterwards, the slopes were optimized for their critical angle as a function of the safety factor. |
| Databáze: | OpenAIRE |
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