Estimation of near-surface geotechnical parameters using seismic measurements at the proposed KACST expansion site, Riyadh, KSA

Almalki, Hashim; El-Werr, Abdel-Khalek; Abdelrahman, Kamal

doi:10.1007/s12517-010-0124-3

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…As a combined result of the above, based on the results of this work and other previous geotechnical works (Almalki et al, 2011;Khalil and Hanafy, 2016;Khorshid, 2016;Abudeif et al, 2017;Adewoyin et al, 2017;Shebl et al, 2019;Momoh et al, 2020;Ghanem et al, 2021;Basheer and Salama, 2022), It can be found that there is a direct relation between the concentration index, material index, and N value for being low for low competent material and increase as it becomes more competent. Inversely, the stress ratio, Poisson's ratio, and density gradient values are high for low competent material and decrease as it becomes more competent.…”

Section: Allowable Bearing Capacity (Qa)supporting

confidence: 77%

“…Shallow seismic refraction is an efficient method for quickly identifying the geotechnical parameters in engineering and construction projects (Almalki et al, 2011;Khalil and Hanafy, 2016;Khorshid, 2016;Abudeif et al, 2017;Adewoyin et al, 2017;Shebl et al, 2019;Momoh et al, 2020;Ghanem et al, 2021). The ground's soil is the only building material with more changeable engineering and physical characteristics that vary both laterally and vertically (Bowles, 1982).…”

Section: Geotechnical Parametersmentioning

confidence: 99%

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Assessing Geotechnical Property for Construction Purposes: A Study on the Efficacy of Shallow Seismic Refraction Tomography Method

Qaher,

Eldosouky,

saada

et al. 2023

Frontiers in Scientific Research and Technology

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The seismic refraction tomography (SRT) method, which is environmentally compatible was used to evaluate the in situ geotechnical properties of rocks in El Alamein, a new city of northwestern Egypt. SRT data were obtained along nine profiles. The results of primary wave velocities (Vp), which are 400 to 1000 m/sec for the first layer, 700 to 1250 m/sec for the second layer, and 550 to 1150 m/sec for the third layer, and secondary wave velocities (Vs), which are 150 to 330 m/sec for the first layer, 230 to 430 m/sec for the second layer, and 170 to 390 m/sec for the third layer, were correlated with the data extracted from nine boreholes drilled within the study area. The elastic moduli (kinetic rigidity, modulus, young modulus, and bulk modulus) and the geotechnical characteristics like Poisson's ratio, stress ratio index, concentration index, material index, N value, density gradient, and bearing capacity of the foundation materials were calculated from the propagation velocities of the different types of seismic waves. These elements were combined to determine the most suitable site for construction. The area can be categorized based on cohesive layer thickness, soil cohesion from geotechnical properties, and proximity to test wells into two regions: (1) unfit for construction due to weak soil cohesion caused by seawater intrusion and thin buildable layers, (2) suitable for construction at one or two levels, with strong soil cohesion, thicker buildable layers, and less noticeable seawater interference.

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Section: Allowable Bearing Capacity (Qa)supporting

confidence: 77%

Section: Geotechnical Parametersmentioning

confidence: 99%

Assessing Geotechnical Property for Construction Purposes: A Study on the Efficacy of Shallow Seismic Refraction Tomography Method

Qaher,

Eldosouky,

saada

et al. 2023

Frontiers in Scientific Research and Technology

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“…One of the Frontiers in Earth Science frontiersin.org 10 seismic survey techniques for determining the elastic condition (stiffness) of the ground for geotechnical engineering purposes is the multichannel analysis of surface waves (MASW) approach. For a variety of geotechnical investigations, using surface wave propagation to get shear wave velocities (Vs) profiles have proven to be a promising technique (Soupois et al, 2007;Almalki et al, 2011;Busato et al, 2016;Liu et al, 2016;Shen et al, 2016;Aldahri et al, 2017;Rahimi et al, 2018;Cardarelli et al, 2018;Hu and Liu, 2019;Mogren et al, 2020;Sena Lozoya et al, 2020;Alamri et al, 2020;Alzahrani et al, 2021a;Alzahrani et al, 2021b;Alzahrani M. et al, 2022;Abd El-Raouf et al, 2021 and;Abd El-Raouf et al 2022). These investigations mainly include building-ground studies, site assessment, determination of the physical properties of rocks and delineating subsurface cavities and weak zones, etc.…”

Section: Multi-channel Analysis Of Surface Waves (Masw)mentioning

confidence: 99%

Geological-geotechnical investigations of the historical Diriyah urban zone in Riyadh, Saudi Arabia: an integrated approach

2023

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One hundred seventy geotechnical boreholes, two geo-seismic profiles of multichannel analyses of surface waves (MASW), and two geoelectrical cross-sections of electrical resistivity tomography (ERT) were carried out in the historical Diriyah urban zone. The borehole samples were analyzed for the geotechnical parameters of the standard penetration test (SPT N-value), the rock quality designation (RQD), and compressive strength (CS). Moreover, P- and S-wave velocities have been calculated. The measured SPT N-value has been corrected to amend the N60 parameter. According to the corrected N60, type, lithological, and soil profiles were divided into five distinct subsurface layers. It is indicated, for all recorded depths, these sediments become denser with depth where the values of N60 increase from 5 to 88 downward. According to grain size distribution, the major part of soil sites is composed of sand and varies from low to medium compressibility. The estimated RQD values range from 5 to 100 indicating rocks with significant variations in their geotechnical and physio-chemical characteristics. Furthermore, the compressive strength varies widely between 152.3 and 1,104.2 kg/cm2, which represents diverse geodynamic behavior under civil engineering constructions. Besides, the range of soil stiffness is indicated by the Shear-wave velocity (Vs) for soil layers, which varies from 171.3 to 456.2 m/s. According to the findings of the MASW profiles, the shear wave velocity is shown to be decreasing in MASW profile 1 between depths of 8 and 14 m, where the values range from 1,000 to 1,500 m/s, indicating a weak zone filled with secondary materials. But line 2 shows how the shear wave velocity decreased from depths of 5 m–11 m, where values ranged from 1,000 to 1,500 m/s, thus indicating a weak zone. The low resistivity zones in ERT cross-sections, which are found at the same depths in MASW profiles, are well associated with these findings. It can be concluded that there are a number of weak zones with varying depths, shapes, and dimensions found in the historical Diriyah urban zone’s near-surface deposits that civil engineers, urban planners, and urban developers should consider before undertaking any construction or developmental work involving civil engineering.

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“…Our area under investigation lies on the shoreline, so it is essential to study the intrusion of water in the layers and any abnormal changes in the homogeneous layers that reflect clay lenses to avoid them (Alshehri et al 2021;Satheeskumar et al 2021;Basheer and Salama 2022). In SSR method, the velocity provides a mechanism for measuring the strength and evaluating the quality of rock materials, since it depends on the density and elasticity of the material through, which the energy is passed (Almalki et al 2011;Comina et al 2021;Ray et al 2021). Because beach sand makes up the surface of the study area, it is crucial to understand the geotechnical properties of the various strata and how they affect the height of structures that are planned to be built (Sakr et al 2021;Basheer and Salama 2022).…”

Section: Introductionmentioning

confidence: 99%

Integration of ERT and shallow seismic refraction for geotechnical investigation on El-Alamein Hotel Building Area, El-Alamein new city, Egypt

Qaher,

Eldosouky,

Saada

et al. 2023

Geomech. Geophys. Geo-energ. Geo-resour.

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El-Alamein new city is regarded as one of the iconic cities of the Egyptian North Western Coast to be not only residential units but also summer resorts for tourist attractions. This study examines the efficiency of integrating geophysical methods for determining if clay lenses exist or seawater has intruded into shallow strata and for calculating the geotechnical parameters of near-surface layers for construction purposes. Nine electrical resistivity tomography (ERT) and shallow seismic refraction (SSR) profiles are conducted in this study. From ERT data, we observed the intrusion of seawater in layers at different depths. From SSR data, two layers are observed along profiles, while three layers are observed along the other profiles according to their velocities. Near-surface geotechnical parameters, that were calculated from SSR data, are integrated to evaluate our study area. Accordingly, it was considered a low-competent area and suitable for buildings with low heights, and the only difference is the intrusion of seawater, therefore, it is subdivided into 2 zones. In zone (A), the second layer is used as a foundation layer. Zone (B) is pretentious by the intrusion of seawater, and it is not suggested to construct any buildings or to improve the strength of concrete exposed to seawater in this zone to be suitable also for buildings with a low height.

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Estimation of near-surface geotechnical parameters using seismic measurements at the proposed KACST expansion site, Riyadh, KSA

Cited by 10 publications

References 11 publications

Assessing Geotechnical Property for Construction Purposes: A Study on the Efficacy of Shallow Seismic Refraction Tomography Method

Assessing Geotechnical Property for Construction Purposes: A Study on the Efficacy of Shallow Seismic Refraction Tomography Method

Geological-geotechnical investigations of the historical Diriyah urban zone in Riyadh, Saudi Arabia: an integrated approach

Integration of ERT and shallow seismic refraction for geotechnical investigation on El-Alamein Hotel Building Area, El-Alamein new city, Egypt

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