Geotechnical and environmental radioactivity investigations at Al Sādis Min Uktōber city, Cairo municipality (Egypt), for the high-speed railway construction

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Geotechnical and environmental radioactivity investigations at Al Sādis Min Uktōber city, Cairo municipality (Egypt), for the high-speed railway construction. / Omar, Ali E.; Sakr, Mohamed A.H.; Taalab, Sherif A. et al.
In: Applied Radiation and Isotopes, No. 193, 110664, 2023.

Research output: Contribution to journal › Article › peer-review

Harvard

Omar, AE, Sakr, MAH, Taalab, SA, Bakhit, A-BA, Pugliese, M, La Verde, G & Hanfi, MY 2023, 'Geotechnical and environmental radioactivity investigations at Al Sādis Min Uktōber city, Cairo municipality (Egypt), for the high-speed railway construction', Applied Radiation and Isotopes, no. 193, 110664. https://doi.org/10.1016/j.apradiso.2023.110664

APA

Omar, A. E., Sakr, M. A. H., Taalab, S. A., Bakhit, A-B. A., Pugliese, M., La Verde, G., & Hanfi, M. Y. (2023). Geotechnical and environmental radioactivity investigations at Al Sādis Min Uktōber city, Cairo municipality (Egypt), for the high-speed railway construction. Applied Radiation and Isotopes, (193), [110664]. https://doi.org/10.1016/j.apradiso.2023.110664

Vancouver

Omar AE, Sakr MAH, Taalab SA, Bakhit A-BA, Pugliese M, La Verde G et al. Geotechnical and environmental radioactivity investigations at Al Sādis Min Uktōber city, Cairo municipality (Egypt), for the high-speed railway construction. Applied Radiation and Isotopes. 2023;(193):110664. doi: 10.1016/j.apradiso.2023.110664

Author

Omar, Ali E. ; Sakr, Mohamed A.H. ; Taalab, Sherif A. et al. / Geotechnical and environmental radioactivity investigations at Al Sādis Min Uktōber city, Cairo municipality (Egypt), for the high-speed railway construction. In: Applied Radiation and Isotopes. 2023 ; No. 193.

BibTeX

@article{9b296c5141d2487d8c7b5370d465bb78,

title = "Geotechnical and environmental radioactivity investigations at Al Sādis Min Uktōber city, Cairo municipality (Egypt), for the high-speed railway construction",

abstract = "The present study aims to evaluate the possibility of constructing a new high-speed railway (HSR) at Al Sādis Min Uktōber city, Cairo (Egypt): geotechnical and environmental radiological hazards are estimated from several collected soil and water samples. A variety of laboratory geotechnical tests such as grain size, free swelling test, liquid and plastic limits, chemical analysis and uniaxial compression strength are applied to sixty-one drill holes. A geotechnical examination of the coarse-grained soil at the foundation level classified it as poorly graded soil. The results of the investigation of fine-grained soil at the foundation level shown that the liquid limit ranges from 22% to 55%, the plastic limit ranges from 12% to 28%, the plasticity index varies from 11% to 33%, free swelling varies from 51% to 71%. Mechanically, the uniaxial compressive strength values on rock samples range from 6.96 MPa to 142.39 MPa. The radioactive study is performed to detect the 226Ra, 232Th, and 40 K activity concentrations of the soil samples: their mean values are 34 ± 10 Bq·kg−1, 14 ± 5 Bq·kg−1 and 552 ± 20 Bq·kg−1, respectively. The values of radiological hazard indexes are not exceeded the permissible limits: e.g. the mean value of absorbed dose rate is 47 ± 6 nGy h−1; the annual gonadal dose equivalent is 0.3 ± 0.04 mSv·y−1; the lifetime cancer risk is 02 ± 0.2·10−3. Thus, the soil in the studied railway area is safe to use in building materials and infrastructure applications: the radiological hazards and the geotechnical studies confirmed the studied area is suitable to construct a new community having a HSR. According to the SWOT-PEST and environmental impact analyses, the construction of the HSR meets the criteria of the Kyoto Protocol, the EU Climate and Energy policy, and other international treaties.",

author = "Omar, {Ali E.} and Sakr, {Mohamed A.H.} and Taalab, {Sherif A.} and Bakhit, {Abu-Bakr A.} and M. Pugliese and {La Verde}, G. and Hanfi, {Mohamed Y.}",

note = "The results of the free swelling (FS) tests can be found in Table 6. The results showed that the soil-free swelling rates investigated were between 51% and 71%. Samples tested with a percentage of free swelling above 50% corresponded to the Egyptian Code 2001 (Ismaiel, 2018). These are categorized as expansive soils. The plasticity index (PI) is an important parameter for the classification of fine-grain soils. If the PI of soil was higher, the soil would have engineering issues such as foundation support for residential buildings and road subgrade (Bowles, 1984). The PI was calculated based on the following equation: PI = LL – PL; where liquid limit (LL) and plastic limit (PL) tests are the Atterberg limit, which results are displayed in Table 6. LL values range from 22% to 55%, PL values range from 12% to 28%, and PI values range from 11% to 33%. The relationship between the PI of the soils studied and the above given percentages shows that the soil falls into the medium to high plasticity range, where higher values of the PI indicate the dangerous effect on the construction (Burmister, 1949). The undrained shear strength (qu) values range from 240 KPa to 310 KPa, the studied clayey soil is classified as very stiff soil (Terzaghi and Peck, 1967). The laboratory determination of the LL and PI for a soil sample allows fine-grained soils to be assigned to the appropriate group using the plasticity chart (Casagrande, 1984). The plasticity chart (Fig. 4) shows that the clay samples of the investigated area can be categorized as inorganic clay of low, intermediate and high plastic soil. The clayey soil is observed as scattered and isolated lenses in 16 boreholes in the research region at depths ranging from 41 m to 48.5 m, with the exception of borehole no. 16 at depths of 20.5 m and 23.5 m. Although there are certain high values in the free swell and plasticity index, they have little influence since they are present in the form of isolated lenses and at deep depths. Also, the absence of groundwater may help prevent these lenses from swelling.",

year = "2023",

doi = "10.1016/j.apradiso.2023.110664",

language = "English",

journal = "Applied Radiation and Isotopes",

issn = "0969-8043",

publisher = "Elsevier",

number = "193",

}

RIS

TY - JOUR

T1 - Geotechnical and environmental radioactivity investigations at Al Sādis Min Uktōber city, Cairo municipality (Egypt), for the high-speed railway construction

AU - Omar, Ali E.

AU - Sakr, Mohamed A.H.

AU - Taalab, Sherif A.

AU - Bakhit, Abu-Bakr A.

AU - Pugliese, M.

AU - La Verde, G.

AU - Hanfi, Mohamed Y.

N1 - The results of the free swelling (FS) tests can be found in Table 6. The results showed that the soil-free swelling rates investigated were between 51% and 71%. Samples tested with a percentage of free swelling above 50% corresponded to the Egyptian Code 2001 (Ismaiel, 2018). These are categorized as expansive soils. The plasticity index (PI) is an important parameter for the classification of fine-grain soils. If the PI of soil was higher, the soil would have engineering issues such as foundation support for residential buildings and road subgrade (Bowles, 1984). The PI was calculated based on the following equation: PI = LL – PL; where liquid limit (LL) and plastic limit (PL) tests are the Atterberg limit, which results are displayed in Table 6. LL values range from 22% to 55%, PL values range from 12% to 28%, and PI values range from 11% to 33%. The relationship between the PI of the soils studied and the above given percentages shows that the soil falls into the medium to high plasticity range, where higher values of the PI indicate the dangerous effect on the construction (Burmister, 1949). The undrained shear strength (qu) values range from 240 KPa to 310 KPa, the studied clayey soil is classified as very stiff soil (Terzaghi and Peck, 1967). The laboratory determination of the LL and PI for a soil sample allows fine-grained soils to be assigned to the appropriate group using the plasticity chart (Casagrande, 1984). The plasticity chart (Fig. 4) shows that the clay samples of the investigated area can be categorized as inorganic clay of low, intermediate and high plastic soil. The clayey soil is observed as scattered and isolated lenses in 16 boreholes in the research region at depths ranging from 41 m to 48.5 m, with the exception of borehole no. 16 at depths of 20.5 m and 23.5 m. Although there are certain high values in the free swell and plasticity index, they have little influence since they are present in the form of isolated lenses and at deep depths. Also, the absence of groundwater may help prevent these lenses from swelling.

PY - 2023

Y1 - 2023

N2 - The present study aims to evaluate the possibility of constructing a new high-speed railway (HSR) at Al Sādis Min Uktōber city, Cairo (Egypt): geotechnical and environmental radiological hazards are estimated from several collected soil and water samples. A variety of laboratory geotechnical tests such as grain size, free swelling test, liquid and plastic limits, chemical analysis and uniaxial compression strength are applied to sixty-one drill holes. A geotechnical examination of the coarse-grained soil at the foundation level classified it as poorly graded soil. The results of the investigation of fine-grained soil at the foundation level shown that the liquid limit ranges from 22% to 55%, the plastic limit ranges from 12% to 28%, the plasticity index varies from 11% to 33%, free swelling varies from 51% to 71%. Mechanically, the uniaxial compressive strength values on rock samples range from 6.96 MPa to 142.39 MPa. The radioactive study is performed to detect the 226Ra, 232Th, and 40 K activity concentrations of the soil samples: their mean values are 34 ± 10 Bq·kg−1, 14 ± 5 Bq·kg−1 and 552 ± 20 Bq·kg−1, respectively. The values of radiological hazard indexes are not exceeded the permissible limits: e.g. the mean value of absorbed dose rate is 47 ± 6 nGy h−1; the annual gonadal dose equivalent is 0.3 ± 0.04 mSv·y−1; the lifetime cancer risk is 02 ± 0.2·10−3. Thus, the soil in the studied railway area is safe to use in building materials and infrastructure applications: the radiological hazards and the geotechnical studies confirmed the studied area is suitable to construct a new community having a HSR. According to the SWOT-PEST and environmental impact analyses, the construction of the HSR meets the criteria of the Kyoto Protocol, the EU Climate and Energy policy, and other international treaties.

AB - The present study aims to evaluate the possibility of constructing a new high-speed railway (HSR) at Al Sādis Min Uktōber city, Cairo (Egypt): geotechnical and environmental radiological hazards are estimated from several collected soil and water samples. A variety of laboratory geotechnical tests such as grain size, free swelling test, liquid and plastic limits, chemical analysis and uniaxial compression strength are applied to sixty-one drill holes. A geotechnical examination of the coarse-grained soil at the foundation level classified it as poorly graded soil. The results of the investigation of fine-grained soil at the foundation level shown that the liquid limit ranges from 22% to 55%, the plastic limit ranges from 12% to 28%, the plasticity index varies from 11% to 33%, free swelling varies from 51% to 71%. Mechanically, the uniaxial compressive strength values on rock samples range from 6.96 MPa to 142.39 MPa. The radioactive study is performed to detect the 226Ra, 232Th, and 40 K activity concentrations of the soil samples: their mean values are 34 ± 10 Bq·kg−1, 14 ± 5 Bq·kg−1 and 552 ± 20 Bq·kg−1, respectively. The values of radiological hazard indexes are not exceeded the permissible limits: e.g. the mean value of absorbed dose rate is 47 ± 6 nGy h−1; the annual gonadal dose equivalent is 0.3 ± 0.04 mSv·y−1; the lifetime cancer risk is 02 ± 0.2·10−3. Thus, the soil in the studied railway area is safe to use in building materials and infrastructure applications: the radiological hazards and the geotechnical studies confirmed the studied area is suitable to construct a new community having a HSR. According to the SWOT-PEST and environmental impact analyses, the construction of the HSR meets the criteria of the Kyoto Protocol, the EU Climate and Energy policy, and other international treaties.

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UR - https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=tsmetrics&SrcApp=tsm_test&DestApp=WOS_CPL&DestLinkType=FullRecord&KeyUT=000976737600001

U2 - 10.1016/j.apradiso.2023.110664

DO - 10.1016/j.apradiso.2023.110664

M3 - Article

JO - Applied Radiation and Isotopes

JF - Applied Radiation and Isotopes

SN - 0969-8043

IS - 193

M1 - 110664

ER -

ID: 33982368