1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. © Geotechnical Behaviour Of Saline Sabkha Soils Abduljauwad, SN; AlAmoudi, OSB THOMAS TELFORD SERVICES LTD, GEOTECHNIQUE;

1.2.3.4.5.6.7.8.9.10.11.

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Geotechnical Behaviour Of Saline Sabkha Soils

Abduljauwad, SN; AlAmoudi, OSB

THOMAS TELFORD SERVICES LTD, GEOTECHNIQUE; pp: 425-445; Vol: 45

King Fahd University of Petroleum & Minerals

http://www.kfupm.edu.sa

Summary

The behaviour of salt-cemented sabkha soil was investigated by considering the effect

of brine and distilled water on its properties. Laboratory and field testing programmes

were conducted to examine the effect of soaking and leaching on the structure,

compressibility, collapse, permeability, load-carrying capacity and settlement of

sabkha soil. Results indicate that the percolation of distilled water through the sabkha

causes destruction of the natural cementation, leading to collapse, increase in

permeability, reduction in strength and increase in settlement. Dissolution and

leaching of halite, gypsiferous and calcarenite cements occur, leaving the quartz

particles covered by a thin loose mat of illitic clay with large voids. The collapse

deformation of sabkha is inclusively linked to the ambient salt complex, which

determines the structural properties of the soil and promotes the development of

collapse on wetting. The soaking of sabkha produces practically negligible collapse;

leaching causes a significant collapse due to the softening, dissolution and effusion of

salts from the soil skeleton.

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Copyright: King Fahd University of Petroleum & Minerals;http://www.kfupm.edu.sa

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