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Investigation and Design of Remedial Measures for Landslide in Hunthar Veng, Mizoram—A Case Study
https://orcid.org/http://orcid.org/0000-0002-1992-2801
The city of Aizawl (Capital of Mizoram) is linked with rest of India through the National Highway-54 (NH-54). The highway near the Aizawl city is prone to landslide (at Km 179.50 on NH-54) and sinking due to haphazard growth of the city on vulnerable slopes and poor drainage system. The Hunthar Veng landslide area is active since 1993 and gets reactivated every year after the monsoon. If the area continues to slide and sink and not treated properly, it is possible that hazard could propagate to a much larger area, thereby putting a greater number of houses and properties at risk. Looking into the danger prevailing in the region, it was decided to focus on strengthening the slope and increase its stability. Slope stability analysis was carried out by considering the seismicity susceptibility. Different ground improvement options like (a) Grouted nails, (b) Removal of debris and installation of grouted Nails and (c) Stepped Slope with Cut-off Wall were considered for stabilising the slope. From the slope stability analysis, it was found that the factor of safety of the slope after applying different measures was not adequate except in one condition, where cut-off walls of large depth, i.e. up to 20 m in depth at a spacing of 2.5-3 m from top to bottom was provided. This solution analytically appears safe but has its own demerits like high cost and time consuming. Therefore, economical and environmentally friendly remedial measures were suggested.
Investigation and Design of Remedial Measures for Landslide in Hunthar Veng, Mizoram—A Case Study
https://orcid.org/http://orcid.org/0000-0002-1992-2801
The city of Aizawl (Capital of Mizoram) is linked with rest of India through the National Highway-54 (NH-54). The highway near the Aizawl city is prone to landslide (at Km 179.50 on NH-54) and sinking due to haphazard growth of the city on vulnerable slopes and poor drainage system. The Hunthar Veng landslide area is active since 1993 and gets reactivated every year after the monsoon. If the area continues to slide and sink and not treated properly, it is possible that hazard could propagate to a much larger area, thereby putting a greater number of houses and properties at risk. Looking into the danger prevailing in the region, it was decided to focus on strengthening the slope and increase its stability. Slope stability analysis was carried out by considering the seismicity susceptibility. Different ground improvement options like (a) Grouted nails, (b) Removal of debris and installation of grouted Nails and (c) Stepped Slope with Cut-off Wall were considered for stabilising the slope. From the slope stability analysis, it was found that the factor of safety of the slope after applying different measures was not adequate except in one condition, where cut-off walls of large depth, i.e. up to 20 m in depth at a spacing of 2.5-3 m from top to bottom was provided. This solution analytically appears safe but has its own demerits like high cost and time consuming. Therefore, economical and environmentally friendly remedial measures were suggested.
Investigation and Design of Remedial Measures for Landslide in Hunthar Veng, Mizoram—A Case Study
https://orcid.org/http://orcid.org/0000-0002-1992-2801
The city of Aizawl (Capital of Mizoram) is linked with rest of India through the National Highway-54 (NH-54). The highway near the Aizawl city is prone to landslide (at Km 179.50 on NH-54) and sinking due to haphazard growth of the city on vulnerable slopes and poor drainage system. The Hunthar Veng landslide area is active since 1993 and gets reactivated every year after the monsoon. If the area continues to slide and sink and not treated properly, it is possible that hazard could propagate to a much larger area, thereby putting a greater number of houses and properties at risk. Looking into the danger prevailing in the region, it was decided to focus on strengthening the slope and increase its stability. Slope stability analysis was carried out by considering the seismicity susceptibility. Different ground improvement options like (a) Grouted nails, (b) Removal of debris and installation of grouted Nails and (c) Stepped Slope with Cut-off Wall were considered for stabilising the slope. From the slope stability analysis, it was found that the factor of safety of the slope after applying different measures was not adequate except in one condition, where cut-off walls of large depth, i.e. up to 20 m in depth at a spacing of 2.5-3 m from top to bottom was provided. This solution analytically appears safe but has its own demerits like high cost and time consuming. Therefore, economical and environmentally friendly remedial measures were suggested.
Investigation and Design of Remedial Measures for Landslide in Hunthar Veng, Mizoram—A Case Study
Lecture Notes in Civil Engineering
Satyanarayana Reddy, C. N. V. (editor) / Muthukkumaran, K. (editor) / Vaidya, Ravikiran (editor) / Vinoth, M. (author) / Prasad, P. S. (author) / Mathur, Sudhir (author) / Kumar, Kishor (author)
2021-11-24
12 pages
Article/Chapter (Book)
Electronic Resource
English
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