How does changing the internal friction angle of the soil affect the bearing capacity? (Excel Spreadsheet)

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Excel Spreadsheet: #foundation_engineering #bearing_capacity #excel_spreadsheet :

The failure zone under a foundation can be divided into three key parts:
1- Triangular Zone: This zone, directly beneath the foundation, fails in a triangular pattern due to compression. Higher friction angles result in a larger triangular zone, as the soil can better withstand compression without failure.
2- Radial (Logarithmic Spiral) Shear Zone: This zone represents the path of soil failure around the foundation in a spiral pattern. With higher friction angles, the radial shear zone tends to be larger, as the soil can resist shear stresses more effectively.
3- Triangular Rankine Passive Zone: Located outside the failure surface, this zone is under passive stress and contributes to the bearing capacity. Higher friction angles lead to a larger Rankine passive zone, providing more support to the foundation.
💎 In summary, higher friction angles result in larger triple zones, including the triangular, radial shear, and Rankine passive zones. This enlargement collectively contributes to a higher bearing capacity for the foundation.

The Link on the YouTube Channel:

https://www.youtube.com/@Dr.Fahmi.GEOtExcel

Soil Mechanics/Unified Soil Classification System (USCS)/Excel Spreadsheet

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Excel Spreadsheet: #soilmechanics #Soil Classification #USCS :

The Unified Soil Classification System (USCS) is a widely-used method for categorizing soils based on their engineering properties. It classifies soils into two main groups: coarse-grained soils, such as gravels and sands, and fine-grained soils, including silts and clays. Within these groups, soils are further classified based on their grain size distribution, plasticity, and compressibility characteristics. This system utilizes a combination of letters and symbols to represent various soil types, such as GW for well-graded gravels, SM for silty sands, and CL for low-plasticity clays. The USCS provides engineers and geologists with a standardized framework for understanding and analyzing soil behavior in construction and geotechnical applications.

The Link on the YouTube Channel:

https://www.youtube.com/watch?v=MRlMFXpHtgw

Soil Mechanics: Shear Strength: Triaxial CD & CU Tests (Excel Spreadsheets)

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Excel Spreadsheet: #soilmechanics #Shear Strength #Triaxial CD & CU Tests :

The triaxial shear tests, including the consolidated drained (CD) and consolidated undrained (CU) tests, are essential in geotechnical engineering. They provide valuable data on soil behavior under different loading conditions. The CD test assesses shear strength parameters like cohesion and angle of internal friction, while the CU test helps evaluate undrained shear strength, particularly important for saturated soils. Results from these tests inform foundation design, slope stability analysis, and other geotechnical considerations in construction projects.The triaxial shear tests, including the consolidated drained (CD) and consolidated undrained (CU) tests, are essential in geotechnical engineering. They provide valuable data on soil behavior under different loading conditions. The CD test assesses shear strength parameters like cohesion and angle of internal friction, while the CU test helps evaluate undrained shear strength, particularly important for saturated soils. Results from these tests inform foundation design, slope stability analysis, and other geotechnical considerations in construction projects.

The Link on the YouTube Channel:

https://www.youtube.com/watch?v=5NvPIB1CEzk&t=46s

https://www.youtube.com/watch?v=ABzuZtPJ1-o

Soil Mechanics: How can soil particle size be graphically represented in Microsoft Excel?

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Excel Spreadsheet: #soilmechanics #Particle_size #Gradation_curve :

A semi-logarithmic particle size graph is a valuable tool in soil mechanics, allowing engineers and geologists to visualize and analyze the distribution of soil particle sizes. By presenting particle size data on a logarithmic scale for one axis, it effectively compresses a wide range of particle sizes into a manageable space while maintaining a linear scale on the other axis. This graphical representation is instrumental in understanding soil properties, such as permeability, compaction, and drainage characteristics, aiding in the design and analysis of various geotechnical engineering projects.

Soil Mechanics

The Link on the YouTube Channel:

https://youtu.be/b1LrrIB7V0k

Soil Mechanics: Soil Classification (UScS)

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Excel Spreadsheet: #soilmechanics #USCS #unified #soil #classification #System :

The Unified Soil Classification System (USCS) is a standardized method for categorizing soils based on their physical and engineering properties. It classifies soils into coarse-grained and fine-grained categories, further subdividing them based on grain size distribution, plasticity, and other characteristics. The USCS utilizes letters and symbols to represent soil properties, facilitating precise identification and characterization of soil types. Widely used in geotechnical engineering, the USCS aids in site investigation, foundation design, and construction planning by providing insights into soil behavior and properties.

The Link on the YouTube Channel:

https://www.youtube.com/watch?v=Z7w0dPFC9us&t=208s

Soil Mechcnics: Stress Distribution/Strip Loading/ Boussinesq Method

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Excel Spreadsheet: #soilmechanics #stress #strip #Boussinesq :

In soil mechanics, the Boussinesq method is a classical analytical technique used to determine stress distribution beneath surface loads on soil. Named after Joseph Boussinesq, it assumes soil behaves as isotropic, homogeneous, and linearly elastic. By representing surface loads as point loads or continuous strip loads, engineers can calculate stresses at various depths below the surface, aiding in analyzing settlement, bearing capacity, and soil stability. While useful for preliminary analysis, the method has limitations in complex or non-linear soil behavior and loading conditions. Nonetheless, it remains valuable in foundation design and soil structure analysis.

The Link on the YouTube Channel:

https://www.youtube.com/watch?v=PC8BQrJpbp8&t=1s

Advanced soil mechanics: Modified Cam Clay (HOC: Highly over-consolidated clay)

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Excel Spreadsheet: #soilmechanics #camcaly #modifiedcamclay :

The Modified Cam Clay (MCC) model is an advanced constitutive model used in soil mechanics to simulate the behavior of cohesive soils under various loading conditions. It builds upon the original Cam Clay model but incorporates modifications to better capture complex soil behavior, especially in high-stress or high-strain situations. Key enhancements include the addition of a critical state line and the integration of critical state concepts, allowing for more accurate predictions of soil behavior under both isotropic and anisotropic stress conditions. The MCC model is widely utilized in geotechnical engineering for analyzing slope stability, designing foundations, and other soil-related applications.

The Link on the YouTube Channel:

https://www.youtube.com/watch?v=CtvcXY4sAmU&t=9s

Soil Mechanics: Shear Strength (Excel Spreadsheet)

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Excel Spreadsheet: #soilmechanics #shearstreength #Mohrcoulomb :

In geotechnical engineering, shear strength is pivotal for understanding soil and rock stability under deformation forces. The Mohr-Coulomb failure criterion, represented graphically by Mohr circles, illustrates the relationship between shear and normal stresses on potential failure planes. “Active” and “passive” states describe soil behavior under shear stress: “active” denotes soil prone to shearing, while “passive” signifies soil resistance to shearing forces. Understanding these concepts and their graphical representation is vital for analyzing and designing stable structures in geotechnical engineering.

The Link on the YouTube Channel:

https://www.youtube.com/watch?v=9g8jc7q5Mo4

Soil Mechanics: Seepage / Flow Net (Excel)

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Excel Spreadsheet: #soilmechanics #Seepage #Flownet :

A flow net is a graphical tool used in soil mechanics to analyze seepage through soil structures. It consists of intersecting flow and equipotential lines representing water flow and hydraulic potential distribution. Engineers use flow nets to visualize and quantify seepage rates, flow directions, and areas of high pore water pressure, aiding in the design and stability analysis of hydraulic structures like dams. They are essential for optimizing designs and identifying potential failure mechanisms to ensure the safety and performance of soil structures under seepage conditions.

Soil mechanics Seepage Flow net

The Link on the YouTube Channel:

https://www.youtube.com/watch?v=9g8jc7q5Mo4

Foundation Engineering: Bearing Capacity (Excel)

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Excel Spreadsheet: #foundationengineering #bearing capacity :

The ultimate bearing capacity of soil represents the maximum load per unit area it can withstand without failing or undergoing excessive settlement. It’s crucial in geotechnical engineering for ensuring the safety and stability of structures. Factors like soil type, density, and moisture content influence this capacity, which engineers calculate to design structures capable of withstanding expected loads.

The Link on the YouTube Channel:

https://www.youtube.com/watch?v=5qv9k4elXcw&t=16s