Construction and field measurement of high-speed railway test embankment built on Indian expansive soil “Black Cotton Soil”

Show simple item record Watanabe, Kenji Nakajima, Susumu Fujiwara, Torajiro Yoshii, Kyoichiro Rao, Guda Venkatappa
dc.coverage.spatial United States of America 2020-12-09T14:01:04Z 2020-12-09T14:01:04Z 2020-11
dc.identifier.citation Watanabe, Kenji; Nakajima, Susumu; Fujiwara, Torajiro; Yoshii, Kyoichiro and Rao, Guda Venkatappa, “Construction and field measurement of high-speed railway test embankment built on Indian expansive soil “Black Cotton Soil””, Soils and Foundations, DOI: 10.1016/j.sandf.2020.08.008, vol. 61, no. 1, pp. 218-238, Nov. 2020. en_US
dc.identifier.issn 0038-0806
dc.description.abstract The railway embankment applied to high-speed railways is required to have high performance in terms of strength and deformation characteristics. Especially in the case of railway embankments that support slab tracks, the allowable settlement is very small. There are two technical challenges in constructing high-speed rail embankments to support slab tracks in India. The first challenge is dealing with problematic black cotton soil (BCS), which is widely distributed in India but very unusual soil in Japan. The second challenge is posed by the strict deformation requirement in the construction of the embankments. In this study, a 6 m-high test embankment was constructed on BCS in India. The deformation of the embankment and changes in water content were measured over a period of 18 months. In the construction of the test embankment, two different BCS countermeasures were applied. The results of the tests on this embankment were compared with those from an embankment without countermeasures. Complicated deformation behaviors, including settlement and the uplift of embankment, were observed in the section without countermeasure. However, in the embankment with cement-mixed gravelly soil (CGS) slab improvement with geosynthetics, the much lower amplitude of embankment deformation is evidence of the effectiveness of this countermeasure. The cohesive non-swelling soil (CNS) layer applied immediately below the embankment to reduce the water content fluctuation of BCS was not effective enough for use for high-speed railway embankment. Besides determining the technical challenges for the BCS countermeasures, the results of this study confirmed that a high-performance embankment can be constructed with Indian embankment material by performing sufficient compaction management.
dc.description.statementofresponsibility by Kenji Watanabe, Susumu Nakajima, Torajiro Fujiwara, Kyoichiro Yoshii and G.Venkatappa Rao
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Expansive soil en_US
dc.subject Railway embankment en_US
dc.subject Black cotton soil en_US
dc.subject Counter measure en_US
dc.subject Construction management en_US
dc.subject Compaction en_US
dc.title Construction and field measurement of high-speed railway test embankment built on Indian expansive soil “Black Cotton Soil” en_US
dc.type Article en_US
dc.relation.journal Soils and Foundations

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