Show simple item record Ariyarathna, PRC Thilakasiri, HS 2017-02-17T05:49:31Z 2017-02-17T05:49:31Z
dc.description.abstract Vacuum consolidation was used to improve highly compressible soft organic soil encountered in the Southern Transport Development Project in Sri Lanka. As this method of soil improvement is used for the first time in Sri Lanka, several trial embankments were built to study the feasibility and the effectiveness of the vacuum consolidation method in improving the Sri Lankan peaty soils prior to adopting the same in main construction work. At the trial embankment sites the founding soil mainly consisted of very soft highly compressible peaty or organic soil layers of thickness varying from 3 to 8 m. The soft layers were improved by a combined vacuum consolidation and surcharging with 5 to 9m high stage constructed embankments to compensate the primary consolidation settlements and to minimize the secondary settlements that can take place during the service life of the road. The improvement in the peaty soil due to the vacuum consolidation was assessed from the data obtained through the field monitoring program and the results obtained from the laboratory and field tests carried out on improved and unimproved ground areas. The obtained data was analyzed to investigate the effectiveness of vacuum consolidation process in improving the properties of Sri Lankan peaty soils. Furthermore, the obtained data was analyzed to quantify the improvement in the strength gain due to vacuum consolidation and compressibility properties of Sri Lankan peaty soils as a results of the over consolidation due to vacuum consolidation process. In addition, some of the already published empirical correlations for Sri Lankan peaty soils were improved by including the data obtained from the field and laboratory testing programme carried out under the present study. en_US
dc.language.iso en en_US
dc.subject shear strength, compressible, vacuum consolidation, peaty soil, strength gain en_US
dc.title Improvement of Sri Lankan peaty soil by vacuum consolidation en_US
dc.type Conference-Abstract en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Civil Engineering en_US
dc.identifier.year 2011 en_US
dc.identifier.conference 14th Asian Regional Conference of Soil Mechanics and Geotechnical Engineering en_US Hong Kong en_US

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