Response of sabkha to laboratory tests: A case study

Al‐Amoudi, Omar S. Baghabra; Abduljauwad, Sahel N.; El-Naggar, Z. R.; Rasheeduzzafar,

doi:10.1016/0013-7952(92)90003-h

Cited by 48 publications

(22 citation statements)

References 9 publications

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“…In addition, the less soluble minerals such as gypsum, aragonite or calcite become very weak upon flooding. These attributes make sabkha soils susceptible to collapse upon wetting (Al-Amoudi et al 1992). Because of this, sabkha flats are associated with many engineering problems, such as ravelling, cracking, rutting, and the formation of potholes in recently built highways and expressways (Farwana and Majidzadeh 1988;Al-Abdul Wahhab and Ramadhan 1990).…”

Section: Generalmentioning

confidence: 97%

Effect of geotextiles on the load-carrying capacity and deformation characteristics of sabkha soil

Aiban

Siddiqi

Al‐Amoudi

et al. 2006

Geosynthetics International

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Road construction on sabkha terrain along the coastal regions of the Arabian Gulf and the Red Sea is often faced with different types of damage due to the low bearing capacity of sabkha deposits, especially when they are wetted. Such conditions necessitate the improvement of sabkha prior to any construction. The purpose of this investigation was to upgrade the load-carrying capacity of sabkha soil using geotextiles by varying the geotextile type, base thickness, moisture condition and the magnitude of the deviatoric stress. To achieve these objectives, a special mould was fabricated to accommodate the soil-fabric-aggregate (SFA) systems. The performance of SFA systems was evaluated by measuring the permanent deformation under the applied 'dynamic' load. Results of this study indicate that the selection of an appropriate geotextile type can bring about significant improvement in the load-carrying capacity of the water-sensitive sabkha soils, particularly under soaked conditions. The inclusion of a geotextile layer on top of the sabkha subgrade reduced the thickness of the graded base layer by 34%. In addition, the geotextile increased the stiffness of the sabkha subgrade and reduced the permanent deformation after a certain number of load reputations.

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Section: Generalmentioning

confidence: 97%

Effect of geotextiles on the load-carrying capacity and deformation characteristics of sabkha soil

Aiban

Siddiqi

Al‐Amoudi

et al. 2006

Geosynthetics International

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“…The precipitation of salts below the groundwater table is mainly attributed to the increase in the salt concentration above its saturation limit (Abduljauwad et al 1994;Ahmad 1997;Al-Amoudi 1992;Al-Amoudi and Abduljauwad 1994;Al-Amoudi et al 1995;Ali 1999). The deposition of salt in the surface layers (i.e.…”

Section: Hazards Related To Sabkhamentioning

confidence: 99%

Coupling of remote sensing data aided with field investigations for geological hazards assessment in Jazan area, Kingdom of Saudi Arabia

et al. 2011

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The city of Jazan is situated on the eastern flank of the Read Sea and considered as one of the fastest growing cities in the Kingdom of Saudi Arabia. This zone attracts a lot of investors for various development projects. Recently, many new projects have been implemented and constructed in this region including new urban areas, infrastructures, and industrial projects. However, historically this area has been challenged from different types of geological hazards. These geological hazards are catastrophic events that can cause human injury, loss of life, and economic devastation. The current study is aimed at evaluating the different types of geological hazards in Jazan city. This study is based on interpretation of satellite data such as LANDSAT and QuickBird images, existing geological maps, and physiographical characteristics with the help of field and laboratory analyses. The results of the analysis indicate that there exist various types of geological hazards in the study area mostly related to the natural factors which include (1) Sabkha soil; (2) Salt dome; (3) Loess soil; and (4) Sand dune/drift. Further, the findings of this study revealed that, most of these geological hazards have a severe impact on the ongoing development activities in Jazan area.

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“…Ar-Rayyas Sabkha is the largest in eastern Saudi Arabia and has been recently investigated by several other investigators (Al-Amoudi et al, 1992;Al-Amoudi et al, 1997;Johnson et al, 1978). The largest industrial complexes in the world are located in Jubail Industrial City which was founded partially on Ar-Rayyas and Al-Fasl Sabkha terrains ( Figure 1).…”

Section: Introductionmentioning

confidence: 97%

Performance of a steel structure on Ar-Rayyas Sabkha soils

Sabtan

2005

Geotech Geol Eng

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Sabkha deposits cover extensive areas along the Red Sea and the Arabian Gulf shores. They are the site of huge industrial complexes in spite of their low bearing capacity of its upper part. The strength of the Sabkha soil is controlled by several factors, among them are the evaporatic salts that cement the grains. The Standard Penetration Test (SPT) is used extensively in this terrain but its results are misleading. The Sabkha soil that may give high N value will lose most of its strength upon wetting as part of the salts are dissolved. Therefore, the design N value was adjusted for Sabkhas to account for salt migration, by relating the SPT (N ) value to the Sabkha moisture and salt content. A steel structure factory that was placed in an eastern Saudi Arabian virgin Sabkha deposits was considered. After a few years of operation fresh water leaked through the ground and caused significant differential collapse settlement which threatened the functional integrity of the superstructure. The differential settlement was confined to one area of the structure indicating that localized conditions must have contributed to the observed settlement. The subsurface conditions and the geotechnical properties of the site are presented. A statistical model was developed that quantifies the effect of the moisture and salt content on SPT (N ) values. A simple site procedure is suggested to correct the design N value in similar cases. It was found that the increase in the moisture content could reduce the SPT (N ) values by as much as 60%, good agreements were found between the measured and predicted N values.

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Response of sabkha to laboratory tests: A case study

Cited by 48 publications

References 9 publications

Effect of geotextiles on the load-carrying capacity and deformation characteristics of sabkha soil

Effect of geotextiles on the load-carrying capacity and deformation characteristics of sabkha soil

Coupling of remote sensing data aided with field investigations for geological hazards assessment in Jazan area, Kingdom of Saudi Arabia

Performance of a steel structure on Ar-Rayyas Sabkha soils

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