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Lateral Displacements of Soft Ground Treated with PVDs Under Embankment Loading
Soft ground consolidates and deforms laterally especially at later stages during embankment construction. Ground improvement by PVDs is one of the common methods to accelerate the rate of consolidation. In this study, field data from an ultra-mega power project is considered and analysed by PLAXIS to evaluate the performance of the ground during and soon after construction of the embankment. Test embankment of 4 m height with side slopes of 2H:1 V constructed as surcharge load is analysed. Responses of PVD-treated ground with PVDs at 1.25, 1.5, and 2.5 m spacing are analysed. Settlements and lateral displacements during the construction phase are analysed. The variations of vertical and lateral deformations of soft soils and overlaying stratified deposits are evaluated with time. Settlements of 503, 488, and 440 mm are achieved in 405 days for ground treated with PVDs at 1.25, 1.5, and 2.5 m drain spacing, respectively. Lateral deformations beneath the toe of embankment are evaluated for different PVD spacing. Results show the efficacy of improvement of soft ground with PVDs in terms of reduction of lateral deformations and acceleration of settlements with time. Drains at smaller spacing are more effective than those at larger spacing.
Lateral Displacements of Soft Ground Treated with PVDs Under Embankment Loading
Soft ground consolidates and deforms laterally especially at later stages during embankment construction. Ground improvement by PVDs is one of the common methods to accelerate the rate of consolidation. In this study, field data from an ultra-mega power project is considered and analysed by PLAXIS to evaluate the performance of the ground during and soon after construction of the embankment. Test embankment of 4 m height with side slopes of 2H:1 V constructed as surcharge load is analysed. Responses of PVD-treated ground with PVDs at 1.25, 1.5, and 2.5 m spacing are analysed. Settlements and lateral displacements during the construction phase are analysed. The variations of vertical and lateral deformations of soft soils and overlaying stratified deposits are evaluated with time. Settlements of 503, 488, and 440 mm are achieved in 405 days for ground treated with PVDs at 1.25, 1.5, and 2.5 m drain spacing, respectively. Lateral deformations beneath the toe of embankment are evaluated for different PVD spacing. Results show the efficacy of improvement of soft ground with PVDs in terms of reduction of lateral deformations and acceleration of settlements with time. Drains at smaller spacing are more effective than those at larger spacing.
Lateral Displacements of Soft Ground Treated with PVDs Under Embankment Loading
Lecture Notes in Civil Engineering
Muthukkumaran, Kasinathan (editor) / Ayothiraman, R. (editor) / Kolathayar, Sreevalsa (editor) / Abhinay Kumar, C. (author) / Shiva Bhushan, J. Y. V. (author) / Madhira, Madhav (author)
Indian Geotechnical Conference ; 2021 ; Trichy, India
Soil Dynamics, Earthquake and Computational Geotechnical Engineering ; Chapter: 12 ; 119-128
2023-01-01
10 pages
Article/Chapter (Book)
Electronic Resource
English
Lateral Displacements of Soft Ground Under Embankment Loading
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