Ahmed J. R. Al-Heety’s Post

DIFFERENCES BETWEEN GEOTECHNICAL SURVEYS & GEOPHYSICS SURVEYS Geotechnical and geophysical surveys are two essential methods used in various industries to gather critical information about the subsurface conditions of a particular area. While they share the common goal of assessing the ground characteristics, these surveys differ significantly in terms of methodology and purpose. When it comes to assessing the characteristics of the ground beneath us, geotechnical and geophysical surveys are indispensable tools. These surveys play a crucial role in a wide range of industries, including civil engineering, construction, mining, and environmental studies. By providing valuable information about soil composition, rock structures, groundwater levels, and other subsurface features, these surveys enable engineers and scientists to make informed decisions and mitigate potential risks. Source: https://lnkd.in/gxgHD948. Attention to all geophysicists and geotechnical field, do come join us in our upcoming online workshop course Geophysics Application in Geotechnical Work! Register now and be the one in this adventurous workshop Online Workshop Course: Geophysics Application in Geotechnical Work Date: 15 MAY 2024 Time: 9.00 am – 5.30 pm Venue: Online Zoom Application Register now and book your seat! Click link below for more details for the workshop: https://lnkd.in/gYWAK2gH To register, click link below: https://lnkd.in/gZfURdnh Don’t forget to register and join our workshop to gain more knowledge on geophysics application in geotechnical work! #gex #academygex #jeoxplorer #geologist #theorytoreality #geophysical #geotechnical #siteinvestigation #training #workshop #skill #refreshknowledge #exchangeidea

COMMONLY USED GROPHYSICAL SURVEYING METHOD FOR GEOTECHNICAL INVESTIGATION Geotechnical geophysics is routinely used for many types of highway engineering investigations, including: 1. Subsurface characterization: bedrock depth, rock type, layer boundaries, water table, groundwater flow, locating fractures, weak zones, expansive clays, etc.; 2. Engineering properties of Earth materials: stiffness, density, electrical resistivity, porosity, etc.; 3. Highway subsidence: detecting cavities beneath roadways caused by sinkholes, abandoned mines, etc.; and 4. Locating buried manmade objects—buried utilities, underground storage tanks, etc. Source: Anderson, N. L., Croxton, N., Hoover, R., & Sirles, P. (2008). Geophysical methods commonly employed for geotechnical site characterization. Transportation Research Circular, (E-C130). Attention to all geophysicists and geotechnical field, do come join us in our upcoming online workshop course Geophysics Application in Geotechnical Work! Register now and be the one in this adventurous workshop Online Workshop Course: Geophysics Application in Geotechnical Work Date: February 21st, 2024 (Wednesday) Time: 9.00 am – 5.30 pm Venue: Online Zoom Application Register now and book your seat! Click link below for more details for the workshop: https://lnkd.in/gYWAK2gH To register, click link below: https://lnkd.in/gZfURdnh Don’t forget to register and join our workshop to gain more knowledge on geophysics application in geotechnical work! #gex #academygex #jeoxplorer #geologist #theorytoreality #geophysical #geotechnical #siteinvestigation #training #workshop #skill #refreshknowledge #exchangeidea

Geological investigations Geological investigations concern the analysis of the composition and structure of the earth, whether natural or human-made. For example, during the design and delivery of construction engineering projects, the variable or unknown condition of the ground can pose risks both technically and financially. Consequently, geological, or geotechnical investigations offer a way to quantify ground conditions at various stages of such projects. Initial studies for a project may include a recce of potential project sites and their underlying ground conditions. While a more detailed review of the selected location can help determine the development requirements. During construction, ongoing investigations can qualify earlier findings or provide additional information. GPR can play an active role in each of these scenarios, including the ongoing management and maintenance of project assets upon completion. Why use GPR for geological investigations? As a near-surface geophysical technique, GPR in non-intrusive and non-destructive and offers the best resolution in the near-surface compared to other geophysical methods. For that reason, GPR is a popular choice for ground investigations, and under optimum conditions, GPR can work to depths of 15 – 50 m or more. GPR can see into the structure of the ground to provide accurate information concerning the depth to subsurface features, objects, as well as the interfaces between contrasting geological layers. This ability enables the mapping of layer boundaries to determine their thickness and to spot anomalies associated with subsidence or erosion, which could indicate the formation of cavities or problematic sinkholes as well as risk-zones for landslides. Compared to other geophysical methods, the deployment of GPR is typically quicker, more straightforward, and lower cost. #impulseradar #geological #gpr #groundpenetratingradar #georadar

It's Geotechnica next week... find out what Six Steps to Improve Your Geophysics are suggested by our Director, Jonathan Thomas

WHAT IS SEISMIC SURVEY IN GEOTECHNICAL WORK? A seismic survey is a geophysical method used in geotechnical engineering to investigate the subsurface structure and properties of the Earth. It involves the generation and detection of seismic waves, which are acoustic waves that travel through the ground. Seismic surveys are commonly employed to determine the composition, layering, and other characteristics of the subsurface, providing valuable information for engineering and construction projects. Seismic surveys provide a non-invasive and efficient means of obtaining subsurface information, making them valuable tools in geotechnical investigations for infrastructure projects, environmental studies, and resource exploration. Attention to all geophysicist and geotechnical sectors out there, eager to deepen your knowledge in geophysics and geotechnical engineering? Look no further! Join our upcoming online workshop course designed exclusively for geophysicists and experts in geotechnical field! The details of the workshop are as follows: Online Workshop Course: Geophysics Application in Geotechnical Work Date: February 21st, 2024 (Wednesday) Time: 9.00 am – 5.00 pm Venue: Online Zoom Application Register now and book your seat! Click link below for more details for the workshop https://lnkd.in/gYWAK2gH To register, click link below: https://lnkd.in/gZfURdnh Don’t forget to register and join our workshop to gain more knowledge on geophysics application in geotechnical work! **THIS WORKSHOP ENTITLES YOU TO 7 CPD HOURS APPROVED BY BEM #gex #academygex #jeoxplorer #geologist #theorytoreality #geophysical #geotechnical #siteinvestigation #training #workshop #skill #refreshknowledge #exchangeidea

#SoilScience_Quotations #Question_Answer What are some common challenges you may encounter during geotechnical investigations? During geotechnical investigations, we may encounter several challenges that require careful consideration. One common challenge is dealing with difficult soil conditions, such as highly cohesive or expansive soils, which can significantly impact foundation design. Another challenge is assessing the presence of groundwater and its effect on the stability of excavations or foundations. Additionally, investigating sites with limited access or in remote locations can pose logistical challenges for drilling and fieldwork. Furthermore, encountering unexpected subsurface conditions, such as buried debris or old foundations, can complicate the investigation process. It's important to approach these challenges with a systematic and adaptable approach, utilizing appropriate testing methods and techniques to accurately evaluate the site's geotechnical properties. #geotechnicalengineering #earthworks #engineering #soilmechanics #soilstabilization #soiltesting #geomembrane #geosynthetics #geophysical

WHAT IS SUB SURFACE GEOTECHNICAL SITE INVESTIGATION? On the basis of this investigation, local sections of the sites are drawn. Sub-surface investigations include investigations on rocks ,sub-soils. These investigations are described below. Geotechnical Investigations in Soil ·        The purpose of sub-surface investigations is to determine the extent of vertical and areal variations of soil strata, in the region in which the infrastructure or the buildings are expected to be located. Where the material for the construction of the embankment is not available from the excavation of the canal prism, the sub- surface investigations help in the selection of borrow areas and in the estimation of the quantity of the suitable material which can be borrowed from their.   Geotechnical Investigations in Rock ·        In the light of information obtained from the surface geological mapping, preliminary geological sections are drawn and sub-surface explorations planned accordingly. Sub-surface explorations generally comprise excavating pits, trenches, adits and shafts, the digging of a few auger holes together with drilling deep bore holes with the help of percussion and rotary drills.     Source: https://lnkd.in/gQcptsmn   Do you wish to learn and understand more about subsurface geotechnical site investigation? Join us in our upcoming online workshop course Geophysics Application in Geotechnical Work! Register now and be the one in this adventurous workshop.     Online Workshop Course: Geophysics Application in Geotechnical Work Date: 15 MAY 2024 Time: 9.00 am – 5.30 pm Venue: Online Zoom Application   Register now and book your seat!   Click link below for more details for the workshop: https://lnkd.in/gYWAK2gH   To register, click link below: https://lnkd.in/gZfURdnh   Don’t forget to register and join our workshop to gain more knowledge on geophysics application in geotechnical work!   #gex #academygex #jeoxplorer #geologist #theorytoreality #geophysical #geotechnical #siteinvestigation #training #workshop #skill #refreshknowledge #exchangeidea  

#SoilScience_Quotations #Question_Answer Can you explain the process of conducting a site assessment and geotechnical investigation? Conducting a site assessment and geotechnical investigation involves several steps. First, we need to gather information about the site, such as its location, topography, and any available geologic maps or reports. Then, we conduct fieldwork, which includes drilling boreholes, collecting soil samples, and performing in-situ tests like Standard Penetration Test (SPT) or Cone Penetration Test (CPT). These tests help us determine the soil properties and subsurface conditions. We also assess any potential construction challenges, such as slope stability or groundwater issues. Finally, we analyze the collected data and prepare a geotechnical report that provides recommendations for foundation design and construction methods. This process is crucial to ensure the safety and integrity of any construction project. By understanding the site's geotechnical characteristics, we can make informed decisions and mitigate potential risks. #geotechnicalengineering #earthworks #engineering #soilmechanics #soilstabilization #soiltesting #geomembrane #geosynthetics #geophysical

Geophysical surveys commonly used to detect limestone formations include: 1. Ground Penetrating Radar (GPR): Detect subsurface features by measuring electromagnetic properties variation. Limestone has has different electrical properties compared to surrounding materials allowing GPR detect boundaries with other materials. 2. Electrical Resistivity Tomography (ERT): ERT measures the electrical resistivity of the subsurface materials. Limestone typically has higher resistivity compared to surrounding materials, making it distinguishable in ERT surveys. 3. Seismic Reflection Survey: Involves sending seismic waves into the ground and measuring the reflections to create a subsurface profile. Limestone has distinct seismic properties due to their different acoustic properties(higher density/lower seismic velocity) allowing to be identified through seismic reflection survey. 4. Gravity Surveys: Gravity surveys measure variations in gravitational force caused by differences in subsurface density, making them useful for detecting large limestone structures.

The characterization of a groundwater body involves the construction of a conceptual model that constitutes the base knowledge for monitoring programs, hydrogeological risk assessment, and correct management of water resources. In particular, a detailed geological and geophysical approach was applied to define the alluvial Caronia Groundwater Body (CGWB) and to reconstruct a hydrogeological flow model. The analysis of the CGWB, located in north-eastern Sicily, was initially approached through a reanalysis of previous stratigraphic (boreholes) and geophysical (vertical electrical soundings and seismic refraction profiles) data, subsequently integrated by new seismic acquisitions, such as Multichannel Analysis of Surface Waves (MASW) and horizontal-to-vertical seismic ratio (HVSR). The analysis and reinterpretation of geoelectrical data allowed the construction of a preliminary 3D resistivity model. This initial modeling was subsequently integrated by a geophysical data campaign in order to define the depth of the bottom of the shallow CGWB and the thickness of alluvial deposits. Finally, a preliminary mathematical model flow was generated in order to reconstruct the dynamics of underground water. The results show that integration of multidisciplinary data represent an indispensable tool for the characterization of complex physical systems. Keywords: groundwater body; VES; HVSR; MASW; 3D model; hydrogeological flow model https://lnkd.in/dfCFeVAj