UNIT 2 | SHALLOW FOUNDATION

2.10.1 Limitations of Plate Load Test

Welcome to our detailed tutorial on Shallow Foundations! This video is packed with essential knowledge for anyone interested in geotechnical engineering, civil engineering students, and professionals looking to deepen their understanding of shallow foundation design and analysis. Join us as we dive into the key topics and concepts outlined below:

2.1 Introduction to Shallow Foundation:
Get an overview of what shallow foundations are, their purpose, and their importance in supporting structures. Understand the fundamental principles and applications of shallow foundations in construction.

2.2 Shallow Foundation:
Explore different types of shallow foundations such as strip footings, spread footings, mat (raft) foundations, and slab-on-grade foundations. Learn about the factors determining the significant depth of footing to ensure stability and adequate load distribution. Understand the essential criteria for designing shallow foundations, including bearing capacity, settlement, and safety factors. Follow a step-by-step guide to designing a shallow foundation, from initial site assessment to final implementation.

2.3 Proportioning of Footings:
Learn about the methods for proportioning footings to ensure even load distribution and structural integrity. Understand the key considerations in the proportioning process, including load types and soil characteristics.

2.4 Bearing Capacity of Soils:

2.4.1 Types of Bearing Capacity:
Differentiate between ultimate bearing capacity, net ultimate bearing capacity, and allowable bearing capacity. Understand how each type impacts foundation design.

2.5 Various Factors Affecting Bearing Capacity:
Discover the various factors that influence the bearing capacity of soils, including soil type, moisture content, and load conditions. Learn how these factors affect the safety and performance of shallow foundations.

2.6 Types of Shear Failure:
Understand the characteristics and implications of general shear failure in soils. Learn about local shear failure, its causes, and its impact on foundation stability. Explore punching shear failure, common in certain types of soil, and its effect on foundation performance. Learn methods for determining ultimate bearing capacity (UBC) in local shear failure scenarios.

2.7 Methods to Determine UBC of Soil:
Understand Terzaghi’s theory and its application in foundation design. Discover how the water table affects soil bearing capacity as per Terzaghi’s theory. Recognize the limitations and potential inaccuracies in Terzaghi’s analysis. Explore Vesic's theory and its contribution to understanding soil behavior under load. Understand Skempton's theory, particularly for clays and cohesive soils. Learn about Meyerhoff's analysis for bearing capacity, including safety factors and practical applications. Study Hansen's theory and its approach to calculating bearing capacity.

2.8 Settlement Analysis:
Identify the different components contributing to foundation settlement. Understand the causes of settlement, including soil consolidation, load changes, and environmental factors. Learn about immediate settlement and its impact on foundation performance. Explore methods for estimating immediate settlement in different soil types.

2.9 Determine the Bearing Capacity from SPT:
Understand how to use Standard Penetration Test (SPT) data to determine soil bearing capacity.

2.10 Plate Load Test:

2.10.1 Limitations of Plate Load Test:
Learn the limitations of the plate load test and how to interpret its results accurately.

2.11 Contact Pressure Under Rigid & Flexible Footings:
Understand the distribution of contact pressure under rigid and flexible footings.

2.12 Contact Pressure Distribution Diagram Below Rigid & Flexible Footings:
Learn to create and interpret contact pressure distribution diagrams for different types of footings.

2.13 Floating Foundation:
Discover the soil types suitable for constructing floating foundations. Identify the challenges and design considerations for floating foundations. Explore the benefits of using floating foundations in certain soil conditions.

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