CHARACTERIZATION AND EVALUATION OF THE FOUNDATION BEDS AT MIVIDA AREA – NEW CAIRO CITY
text
article
2018
eng
This research involves geotechnical studies for New Cairo City extensions and named “Mivida” - Egypt. Therefore, the objective of this context is to study the physical and engineering properties of the foundation beds, as well as their effects on the construction stability, including grain size distribution, free swell, Atterberg limits, direct shear box, and swelling pressure.Grain size parameters are uniformity coefficient (Cu) and curvature coefficient (Cc) used as principles classification of soil. Uniformity coefficient (Cu) values are ranging from (2.4mm) to (7.05mm), and curvature coefficient (Cc) values are ranging from (0.55mm) to (1.89mm). The studied samples in this study are classified as poorly-graded soil from the point of view of classification engineering geology. The free swell of the studied samples varies between 115% and 180%, liquid limit ranges from 67 to 93%, plastic limit ranges from 22 to 26% and the plasticity index are ranging from 45 to 67. Mechanically, the frictional angle ranges from 30° to 36° and the ultimate bearing capacity for shallow foundation ranges from 616 kN/m2 to 1901 kN/m2 .
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
29
v.
Issue 1-D
no.
2018
1
14
https://absb.journals.ekb.eg/article_60539_2e6ef71dbf4fd3e05bff3db72fcda2f0.pdf
dx.doi.org/10.21608/absb.2018.60539
DELINEATION OF GEOTECHNICAL PARAMETERS USING SHALLOW SEISMIC AND ENGINEERING GEOLOGY AT LAND OF COUNCIL OF NATIONAL DEFENSE 6TH OCTOBER CITY – EGYPT.
text
article
2018
eng
The combination of geophysical data and geotechnical measurements may greatly improve the quality of buildings under construction in civil engineering. The geologic setting and physical and dynamic properties of foundation beds are playing a crucial role in the stability of building, especially in case of the subjection of building to dynamic forces associated with the earthquake occurrence. This research involves geotechnical and shallow seismic refraction for foundation beds at Land of Council of National Defense 6th October City. The shallow seismic refraction technique was also used to evaluate the foundation rock properties in the area by recording the first arrival time of seismic waves and their interpretation in terms of subsurface geoseismic layers and their physical and dynamic properties. The ultimate bearing capacity in the second layer has value ranging between 2876 gm/cm2and 10643gm/cm2, the allowable bearing capacity in the second layer is between 959gm/cm2, to 3842 gm/cm2 and hence the factor of safety is equal 3, this indicates that the bed rock can be classified as cohesive soil. Chemical analysis results reveal content of sulfates and chlorides indicate that most the studied samples are non-aggressive and some samples are moderately aggressive. Mechanically, the frictional angle ranges from 30° to 36° and the ultimate bearing capacity for shallow foundation ranges from 616 kN/m2 to 1901 kN/m2 .
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
29
v.
Issue 1-D
no.
2018
15
28
https://absb.journals.ekb.eg/article_60540_d801e3d7907fdd79d272dc6dce0112e7.pdf
dx.doi.org/10.21608/absb.2018.60540
3D STATIC RESERVOIR MODELING OF SIX HILLS FORMATION IN THE NUQRA BASIN, UPPER EGYPT.
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article
2018
eng
Nuqra basin is located in the south Eastern Desert of Egypt, on the eastern bank of the Nile River. The main objective of the present study is to evaluate the Cretaceous sands, represented by Six Hills Formation, through the integration between seismic and well data. Structure contour maps show regional structures of NW-SE and NE-SW trends. The NW-SE fault trend is a dominant trend. Facies and petrophysical modeling have been made to study the facies and petrophysical property distribution throughout Six Hill Formation. The results of the current study revealed that the area has the necessary elements of petroleum system. Six Hills rock unit is mainly composed of sandstone with good porosities, up to 20 %, but the water saturation seems to be high. The drilled wells are dry holes. Some selected layers within the Six Hills Formation show locations of low water saturation. According to the petrophysical analysis results, prospects were selected in the area of good reservoir properties.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
29
v.
Issue 1-D
no.
2018
29
37
https://absb.journals.ekb.eg/article_60541_37d7d90ce4ed35e1669722ed481ff817.pdf
dx.doi.org/10.21608/absb.2018.60541
BIOSTRATIGRAPHY, MICROFACIES ANALYSIS AND SEQUENCE STRATIGRAPHY OF THE MIOCENE SUCCESSIONS IN CAIRO-SUEZ DISTRICT, EGYPT
text
article
2018
eng
Two Miocene sections in Cairo-Suez district at Tall Zamzam and Wadi Hommath are detailed examined for their foraminiferal, nannofossil contents and microfacies types. Wadi Hommath section is named as the Sadat Formation, while Tall Zamzam section is named as the Genefe Formation. 21species of planktonic, 20 species of benthic, 19 species of nannofossils are identified. Two zones of planktonic foraminifera and one zone of nannofossil attributed the Sadat Formation to Globigerinoides bisphericus (M4) Zone, Praeorbulina sicana (M5a) Zone and Genefe Formation to Praeorbulina glomerosa (M5b) Zone, while Helicosphaera ampliamperta Zone (NN4) of (Burdigalian-Langhian) age is recorded in the two studied secions. The identified benthic foraminifera was used to recognize three biofacies types: Nonion biofacies of inner-shelf environment, Cibicides biofacies of middle-shelf environment and Uvigerina biofacies of outer-shelf environment. Six microfacies types are identified. These successions are subdivided into three depositonal sequences of which 2 fourth order and one third order sequences.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
29
v.
Issue 1-D
no.
2018
39
59
https://absb.journals.ekb.eg/article_60543_13a9c1392a088032b2ccf7ee9017dea8.pdf
dx.doi.org/10.21608/absb.2018.60543
PETROGRAPHICAL, MINERALOGICAL AND GEOCHEMICAL STUDIES OF CRETACEOUS-PALEOCENE CLASTIC ROCKS IN WADI QWIEH – WADI ABU HAMRA AREA, CENTRAL EASTERN DESERT, EGYPT
text
article
2018
eng
Integrated petrographical, mineralogical and geochemical studies were carried out on the sandstone and shale bedsof Tarif, Qusier, Duwi, Dakhla and Esna formations exposed at Wadi Qwieh – Wadi Abu Hamra area, which located between Latitudes 26° 16ʹ and 26° 20ʹ N and Longitudes 34° 05ʹ and 34° 08ʹ EPetrographically, the studied sandstone samples in Tarif Formation is quartz arenite with iron oxides and silica cement, generally monocrystaline, moderately sorted, sub-rounded to sub-angular with normal and wavy extinction. The main mineralogical constituent of the studied sandstone is quartz with hematite, gypsum and microcline as minor constituent. The clay minerals are montmorillonite and kaolinite, where montmorillonite is more abundant that pointed to presence of ultramafic-mafic rocks in the source area.Geochemical studies reflect that the sandstones of the Tarif Formation were probably deposited under relatively warm and slightly alkaline conditions.
Al-Azhar Bulletin of Science
Al-Azhar University, Faculty of Science (Boys)
1110-2535
29
v.
Issue 1-D
no.
2018
61
73
https://absb.journals.ekb.eg/article_60544_368e3f914bf28f0b983d28f5bc28d452.pdf
dx.doi.org/10.21608/absb.2018.60544