TY - GEN
T1 - Analysis of the consolidation effect of ultra-soft ground via vacuum preloading
AU - Xu, B.
AU - Noda, T.
AU - Yamada, S.
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2014
Y1 - 2014
N2 - A soil-water coupled finite element analysis incorporating the macro-element method is carried out to investigate the consolidation effect of ultra-soft soils using the vacuum preloading method. SYS Cam-clay model is employed as the constitutive model. Taking the one-dimensional compression tests and in-situ vane shear tests into consideration, the soil parameters and initial values can be determined correspondingly. The calculation results show that there is a good accordance between the observational and numerical settlements, and the degree of consolidation after 90 days' application of the vacuum pressure is around 61% by predicting the long-term settlement. By reproducing the unconfined compression tests numerically, the undrained shear strength can be determined using the state variables.The variation of undrained shear strength at a depth of 1 meter at different stages of the vacuum preloading shows that the strength of ultra-soft soils increases gradually, which is also very close to the in-situ vane strength.
AB - A soil-water coupled finite element analysis incorporating the macro-element method is carried out to investigate the consolidation effect of ultra-soft soils using the vacuum preloading method. SYS Cam-clay model is employed as the constitutive model. Taking the one-dimensional compression tests and in-situ vane shear tests into consideration, the soil parameters and initial values can be determined correspondingly. The calculation results show that there is a good accordance between the observational and numerical settlements, and the degree of consolidation after 90 days' application of the vacuum pressure is around 61% by predicting the long-term settlement. By reproducing the unconfined compression tests numerically, the undrained shear strength can be determined using the state variables.The variation of undrained shear strength at a depth of 1 meter at different stages of the vacuum preloading shows that the strength of ultra-soft soils increases gradually, which is also very close to the in-situ vane strength.
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U2 - 10.1201/b17190-14
DO - 10.1201/b17190-14
M3 - Conference contribution
AN - SCOPUS:84903547416
SN - 9781138001251
T3 - Civil Engineering and Urban Planning III - Proceedings of the 3rd International Conference on Civil Engineering and Urban Planning, CEUP 2014
SP - 63
EP - 67
BT - Civil Engineering and Urban Planning III - Proceedings of the 3rd International Conference on Civil Engineering and Urban Planning, CEUP 2014
PB - CRC Press
T2 - 3rd International Conference on Civil Engineering and Urban Planning, CEUP 2014
Y2 - 20 June 2014 through 22 June 2014
ER -