Static Compression of Loess Soil and its Effect on the Permeability Changes

Document Type : Original Article

Authors

1 Ph.D. Student of engineering geology at Tarbiat Modares University

2 Assistant Prof. of enginnering geology, Geology group, Tarbiat Modaress University

3 Assistant professor, Department of Engineering Geology, Tarbiat Modares University, nikudelm@modares.ac.ir

Abstract

The relation between Soil compression degree and the permeability changes during static compression process is one of the important factors for understanding hydro mechanical soil behavior. In this research such relationship  has been closely studied. Three soil samples have been selected from loess soil (wind deposits) that extended widely in Golestan province, north eastern Iran. In first step, a test apparatus must  be design to measure the soil compression degree and permeability value simultaneously. The designed apparatus  is able to set high porosity soil sample in a test cell, measurement static compression force, compression degree  and the value of permeability at different stages of soil compression process. In addition,  soil structure can be observed during the test through a camera attached to the test chamber. The results show that soil type and primary structure affect soil compression behavior. Result of Permeability tests of loess soil shows that there is logarithmic relation between void ratio and permeability and its general form of experimental relation is proposed in this research.

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References

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Scientific Quarterly Journal of Iranian Association of Engineering Geology
Volume 10, Number 3 & 4
March 2018
Pages 29-41

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History

  • Receive Date: 15 October 2017
  • Revise Date: 20 March 2018
  • Accept Date: 22 September 2018

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