Hydrogeological effects on premature failure of flexible pavement in hilly area along state highway-I in Mizoram, India
By: Laldintluanga, H
.
Contributor(s): Ramhmachhuani, Rebecca.
Publisher: USA Springer 2023Edition: Vol.53(1), Feb.Description: 29-41p.Subject(s): Civil EngineeringOnline resources: Click here
In:
Indian geotechnical journalSummary: Ground water flow plays a significant role in pavement performance. Weakening of subgrade, sub-base and base by ground water movement is one of the important factors leading to pavement failure. In relation to this, impact of hydrogeological and geotechnical factors on pavement performance has been reported in the present study. The study area under consideration is along state highway-I in Mizoram, India, connecting two major districts of Mizoram, i.e., Aizawl to Lunglei. The state highway has experienced premature failure at multiple locations. Five (05) most critically affected areas having failure span length ranging from 85 to 200 m were chosen for the study. To this end, geophysical and geotechnical tests were conducted at affected stretches to identify the cause of failure. Electrical resistivity method using vertical electrical sounding technique was employed to study groundwater condition and lithology at selected points. Soil samples were obtained from subgrade level at affected locations and laboratory tests were conducted to find out properties pertaining to permeability, compaction and plasticity behavior of soil. A careful evaluation of geophysical and geotechnical test results revealed that geological features were most crucial factor affecting the pavement performance. Factors such as dipping of rock strata toward the cut-slope, the presence of impermeable bedrock strata at shallow depth below subgrade, emanation of groundwater in the form of springs along the hill slope were identified to be the contributing factors resulting in premature failure at locations considered in the study.
| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
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Articles Abstract Database
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School of Engineering & Technology (PG) Archieval Section | Not for loan | 2023-1313 |
Ground water flow plays a significant role in pavement performance. Weakening of subgrade, sub-base and base by ground water movement is one of the important factors leading to pavement failure. In relation to this, impact of hydrogeological and geotechnical factors on pavement performance has been reported in the present study. The study area under consideration is along state highway-I in Mizoram, India, connecting two major districts of Mizoram, i.e., Aizawl to Lunglei. The state highway has experienced premature failure at multiple locations. Five (05) most critically affected areas having failure span length ranging from 85 to 200 m were chosen for the study. To this end, geophysical and geotechnical tests were conducted at affected stretches to identify the cause of failure. Electrical resistivity method using vertical electrical sounding technique was employed to study groundwater condition and lithology at selected points. Soil samples were obtained from subgrade level at affected locations and laboratory tests were conducted to find out properties pertaining to permeability, compaction and plasticity behavior of soil. A careful evaluation of geophysical and geotechnical test results revealed that geological features were most crucial factor affecting the pavement performance. Factors such as dipping of rock strata toward the cut-slope, the presence of impermeable bedrock strata at shallow depth below subgrade, emanation of groundwater in the form of springs along the hill slope were identified to be the contributing factors resulting in premature failure at locations considered in the study.
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