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A platform for research: civil engineering, architecture and urbanism
Consolidation of a composite foundation with soil–cement columns and prefabricated vertical drains
Abstract A new ground improvement method is proposed for embankment foundation on soft soils, involving the use of both soil–cement columns and prefabricated vertical drains (PVDs) to improve the shear strength and accelerate the pre-consolidation process. An analytical solution was derived for calculating the consolidation process of this composite foundation under time-dependent loading by considering the PVDs as cylindrical drain wells. The equivalent coefficient of permeability was acquired by matching the average degree of consolidation of a unit cell model. The analytical expression of consolidation was established according to the axi-symmetric analytical model, and its theoretical solution under time-dependent loading was achieved through the variable separation method. The analytical solution under ramp loading was verified by comparing the calculated results with the three-dimensional finite-element analysis. The influence of replacement ratio of the soil–cement column, column-soil modulus ratio, improvement depth and column-soil permeability ratio were explored. Field experiments on the Huai-Yan Highway indicated the calculated settlements agreed well with the field measurements.
Consolidation of a composite foundation with soil–cement columns and prefabricated vertical drains
Abstract A new ground improvement method is proposed for embankment foundation on soft soils, involving the use of both soil–cement columns and prefabricated vertical drains (PVDs) to improve the shear strength and accelerate the pre-consolidation process. An analytical solution was derived for calculating the consolidation process of this composite foundation under time-dependent loading by considering the PVDs as cylindrical drain wells. The equivalent coefficient of permeability was acquired by matching the average degree of consolidation of a unit cell model. The analytical expression of consolidation was established according to the axi-symmetric analytical model, and its theoretical solution under time-dependent loading was achieved through the variable separation method. The analytical solution under ramp loading was verified by comparing the calculated results with the three-dimensional finite-element analysis. The influence of replacement ratio of the soil–cement column, column-soil modulus ratio, improvement depth and column-soil permeability ratio were explored. Field experiments on the Huai-Yan Highway indicated the calculated settlements agreed well with the field measurements.
Consolidation of a composite foundation with soil–cement columns and prefabricated vertical drains
Ye, Guan Bao (author) / Zhang, Zhen (author) / Xing, Hao Feng (author) / Huang, Mao Song (author) / Xu, Chao (author)
2011
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Consolidation of a composite foundation with soil–cement columns and prefabricated vertical drains
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