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KSCE Journal of Civil Engineering

, Volume 24, Issue 3, pp 752–761 | Cite as

Study on Consolidation Behaviors of Peaty Soils Using a Viscoelastic Rheological-Consolidation Model in Kunming, China

  • Fan-Ge Zhang
  • Kan LiuEmail author
  • Min Yang
Geotechnical Engineering
  • 13 Downloads

Abstract

Due to the presence of organic matters, peaty soils have a highly compressible nature, and the consolidation process is complicated by the occurrence of rheological deformation. This paper presents the behaviors of the peaty soils sampled from the city of Kunming, the capital of Yunnan province in southwestern China. A series of one-dimensional compression tests are carried out on the peaty soil specimens with different organic matter contents. Considering the rheological properties of peaty soils, the three-element viscoelastic rheological model is introduced into the consolidation equation, then the analytical solution is derived for the viscoelastic rheological-consolidation model. Finally, the influences of consolidation pressures and organic matter contents on the model parameters determined by test data fitting are investigated. It has been shown that the model is coinciding fairly well with test results, and the consolidation pressure and organic matter content have a remarkable effect on the model parameters.

Keywords

Peaty soils Organic matter One-dimensional compression Rheological model Parameters 

Nomenclature

a12

Coefficient of compressibility from 100 kPa to 200 kPa

Cc

Compression index

e

Void ratio

E0, E1, η0, kv

Parameters of the viscoelastic rheological-consolidation model

Gs

Mean specific gravity

Gsm

Inorganic specific gravity

Gso

Organic specific gravity

p

Consolidation pressure

S

Axial deformation of the sample

t

Elapsed time

WL

Liquid limit

WP

Plastic limit

W0

Natural water content

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Notes

Acknowledgements

This work is supported by the National Natural Science Foundation of China under Grant No. 41572258.

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Copyright information

© Korean Society of Civil Engineers 2020

Authors and Affiliations

  1. 1.Dept. of Geotechnical EngineeringTongji UniversityShanghaiChina

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