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Document Type |
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Article In Journal |
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Document Title |
: |
Geotechnical and Geochemical Properties of Al-Nekhaila Sabkha, South of Jeddah الخواص الجيوتقنية والجيوكيميائية لسبخة النخيلة جنوب جدة |
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Subject |
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Earth Sciences |
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Document Language |
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English |
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Abstract |
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Sabkhas are widespread along the coastal plains of the
Red Sea. The development of sabkha is mostly attributed to the hot
climate where evaporation, which is responsible of the development
of brines, largely exceeds precipitation. The soil poses several geotechnical
problems specially when wet. The high sulfate and chloride
content in the groundwater may also cause corrosive action on reinforced
concrete.
The city of Jeddah is rapidly expanding and new residential and
commercial buildings are constructed each year in the area close to the
shoreline where sabkhas exist. If the expansion extends southward, it
will reach Al-Nekhaila sabkha. Therefore, the geotechnical and geochemical
characteristics of this sabkha were considered. The field investigations
were performed by three in situ tests, namely Mackintosh
probing, vane shear, and sand cone, to a maximum depth of 9 m.
Three main soil units have been identified; sand (SM, SC, and SP),
silt (ML, and MH) and clay (CL, and CH). The salts are present as cementing
material between the soil grains in the top one meter. The
sand ranges from loose to medium dense as indicated by the soil probing.
The average undrained shear strength for the silt is 84 kN/m2 and
for the clay is 90 kN/m2. Some geotechnical problems are expected
from the clay layer. The groundwater level is 1 m to 2.5 m deep and is
classified as saline to brine. |
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ISSN |
: |
1012-8832 |
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Journal Name |
: |
Earth Sciences Journal |
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Volume |
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11 |
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Issue Number |
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1 |
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Publishing Year |
: |
1420 AH
1999 AD |
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Number Of Pages |
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15 |
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Article Type |
: |
Article |
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Added Date |
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Sunday, October 11, 2009 |
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Researchers
| طلال نايف سرحان | TALAL N. SERHAN | Researcher | | |
| عبدالله عبدالعزيز سبتان | ABDULLAH A. SABTAN | Researcher | | |
|