Consolidation Analysis of Composite Ground with Weak Drainage Columns in Consideration of Disturbance

Xiao Jun Tian; Xiao Nan Gong; Meng Meng Lu; Ning Wang

doi:10.4028/www.scientific.net/AMM.71-78.186

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 71-78Consolidation Analysis of Composite Ground with...

Consolidation Analysis of Composite Ground with Weak Drainage Columns in Consideration of Disturbance

Abstract:

Based on axisymmetric consolidation model, using a new initial condition derived from equilibrium equations and equal strain assumption, and considering the gradual variation of compression modulus and horizontal permeability of disturbed soils, an analytical solution was derived for the consolidation of composite ground with weak drainage columns subjected to an instant loading. Two types of variation patterns of compression modulus of the disturbed zone were considered. The consolidation behavior of composite ground with weak drainage columns was subsequently investigated in consideration of disturbance. The results show that without considering the gradual variation of compression modulus of the disturbed zone will underestimate the rate of consolidation; the size of disturbed zone has a greater influence on the consolidation rate; the larger the disturbed zone, the faster the consolidation rate is; the consolidation is faster if the linear distribution pattern of the variation of compression modulus of the disturbed zone is considered; the consolidation is slower if the exponential distribution pattern is considered.

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Periodical:

Applied Mechanics and Materials (Volumes 71-78)

Pages:

186-192

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.71-78.186

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Online since:

July 2011

Authors:

Xiao Jun Tian, Xiao Nan Gong, Meng Meng Lu, Ning Wang

Keywords:

Composite Ground, Compression Modulus, Consolidation, Disturbance, Instant Loading, Weak Drainage Columns

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References

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