Semi-analytical solutions to the consolidation of unsaturated composite ground enforced by stone columns under equal strain condition considering smear effect

2021 ◽  
pp. 100644
Author(s):  
Liting Zhang ◽  
Lei Wang ◽  
Annan Zhou ◽  
Yongfu Xu ◽  
Xiaohe Xia
Keyword(s):  
Analytical Solutions ◽  
Stone Columns ◽  
Strain Condition ◽  
Composite Ground

Consolidation Theory for Composite Ground with Granular Columns Based on Different Calculation Models

2011 ◽  
Vol 261-263 ◽  
pp. 1534-1538
Author(s):  
Yu Guo Zhang ◽  
Ya Dong Bian ◽  
Kang He Xie
Keyword(s):  
Pore Water ◽  
Analytical Solutions ◽  
Pore Water Pressure ◽  
Water Pressure ◽  
Vertical Flow ◽  
Excess Pore Water Pressure ◽  
Consolidation Theory ◽  
Composite Ground ◽  
Granular Column ◽  
Excess Pore

The consolidation of the composite ground under non-uniformly distributed initial excess pore water pressure along depth was studied in two models which respectively considering both the radial and vertical flows in granular column and the vertical flow only in granular column, and the corresponding analytical solutions of the two models were presented and compared with each other. It shows that the distribution of initial excess pore water pressure has obvious influence on the consolidation of the composite ground with single drainage boundary, and the rate of consolidation considering the radial-vertical flow in granular column is faster than that considering the vertical flow only in granular column.

Numerical Analysis of the Second Composite Ground

2011 ◽  
Vol 347-353 ◽  
pp. 725-732 ◽  
Author(s):  
Shu Li Wang ◽  
Dun Wu Chen ◽  
Ran Wang
Keyword(s):  
Soft Soil ◽  
Volumetric Strain ◽  
Horizontal Displacement ◽  
Reduction Factor ◽  
Stone Columns ◽  
Strength Reduction Factor ◽  
Maximum Shear Strain ◽  
Element Analysis ◽  
Numerical Predictions ◽  
Composite Ground

The behavior of a foundation built on normally consolidated soft soil reinforced with stone columns (SC) and deep mixing columns (DMC) is studied using a finite element analysis program, Phase2D. The numerical predictions are analyzed in terms of absolute vertical displacement, absolute horizontal displacement, mean stresses, volumetric strain, maximum shear strain and strength reduction factor. Firstly, the effectiveness of the use of stone columns, the first composite ground, is studied. Afterwards, because load bearing capacity is less than 160 kPa designed, the effectiveness analysis reinforced with DMC, the second composite ground, is performed to study the influence on the soil-columns system of the foundation and columns.

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