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Journal of Central South University

, Volume 18, Issue 2, pp 504–510 | Cite as

Microscopic analysis of saturated soft clay in Pearl River Delta

  • Hui Zhou (周晖)Email author
  • Ying-guang Fang (房营光)
  • Ren-guo Gu (谷任国)
  • Cheng Zeng (曾铖)
Article

Abstract

A series of researches were carried out for the soil samples in the Pearl River Delta under the action of consolidation loads, such as the quantitative analyses of the pore scale, shape and size distributions of micro-structure units, with an environmental scanning electron microscope (ESEM), a mercury intrusion analyzer and a mineral diffractometer. The experimental results show that the consolidation pressures remarkably change the pore sizes and distribution characteristics of the silt, thus changing its compressibility and permeability. This can be proved by the fact that, in the earlier stage with a consolidation pressure of p<200 kPa, the pore sizes are greater and the compressibility and permeability coefficients are larger. However, they rapidly decrease with the increase in consolidation pressure. And in the later stage with a consolidation pressure of p>200 kPa, the pore sizes are smaller and the compressibility and permeability coefficients are less. Therefore, the empirical formulas of compression coefficient and permeability coefficient vs consolidation load and average pore diameter are deduced.

Key words

saturated soft soil Pearl River Delta (PRD) micro-structure microscopic analysis pore distribution engineering properties 

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Copyright information

© Central South University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Hui Zhou (周晖)
    • 1
    • 2
    Email author
  • Ying-guang Fang (房营光)
    • 1
    • 2
  • Ren-guo Gu (谷任国)
    • 1
    • 2
  • Cheng Zeng (曾铖)
    • 1
    • 2
  1. 1.School of Civil Engineering and TransportationSouth China University of TechnologyGuangzhouChina
  2. 2.State Key Laboratory of Subtropical Building ScienceSouth China University of TechnologyGuangzhouChina

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