Foundation and Forensic Geotechnical Engineering: Proceedings of the Indian Geotechnical Conference 2021 Volume 2

Description

This book comprises the select peer-reviewed proceedings of the Indian Geotechnical Conference (IGC) 2021. The contents focus on Geotechnics for Infrastructure Development and Innovative Applications. This book covers topics related to shallow foundations, pile & piled raft foundation, geotechnical design of foundation, wind turbine foundation, foundations on problematic soils, forensic geotechnical engineering, and case studies on geotechnical failures. This book is of interest to those in academia and industry.    Preface Contents About the Editors 1 Analysis and Design of Foundation System for the Horizontal Solar Axis Tracker Introduction Geotechnical Investigation Analysis of Pile Foundations Theoretical Approaches Finite Element (FE) Analysis Results and Discussion Pile Geometry and Serviceability Criteria Seismic Analysis Conclusions References 2 Bidirectional and Conventional Static Load Test on Bored Piles in Soil: A Field Comparison Introduction General Geological Setting Methodology Results and Discussion Conclusion References 3 The Ultimate Bearing Capacity of Ring Footing with Inclined Base Introduction Problem Definition FE Model Mesh Convergence Study Results and Discussion Comparison of Bearing Capacity of Ring Footing Bearing Capacity of Ring Footing with Inclined Base Conclusions References 4 Comparative Study of Geotechnical Design of Foundations as Per Indian Standards and Eurocode 7 Introduction Design Examples Design of Spread Foundation (Design by Calculation) Design of Spread Foundation on Rock Pile Design by Pile Load Tests Summary and Conclusions References 5 Parametric Study of the Behavior of Large Piled Raft Foundation on Stiff Clay Introduction Numerical Modeling Meshing and Boundary Conditions Constitutive Modeling Model Validation Parametric Study Results and Discussion Effect of Pile Number Effect of Pile Spacing Effect of Pile Length Effect of Raft Thickness Conclusions References 6 Estimation of Shaft-Base Initial Stiffness and Ultimate Resistance of O-Cell Piles Introduction Statement of Problem Methodology Results Conclusion References 7 A Numerical Study of Performance of Large Piled Raft Foundation on Sand Under Vertical Loading Introduction Numerical Modeling Domain Size and Mesh Convergence Material Modeling Model Validation Study Results and Discussion Influence of L/d Ratio and s/d Ratio on the Behavior of Piled Flexible Raft Foundation Influence of Raft Thickness and s/d Ratio on Piled Raft Behavior Conclusions References 8 Effect of Compressibility on Bearing Pressure of Soft Ground Introduction Problem Description Finite Element Model Results Conclusions References 9 Raft Foundation Analysis for a 135-m High-Rise Residential Tower in Noida Introduction Project Details Geotechnical Assessment Geological Setting Geotechnical Investigation Boreholes Pressuremeter Tests Cross-Hole Seismic Tests Design Profile Soil–Structure Interaction Structure Properties Results of Analysis Savings in Cost Concluding Remarks References 10 Model Study on Single Pile Subjected to Axial and Inclined Load Embedded in Contaminated Soil Introduction Experimental Investigation Foundation Medium Industrial Wastewater Tests on Contaminated Soil Experimental Setup Research Methodology Results and Discussions Conclusion References 11 Behavior of Combined Piled-Raft Foundation Under Eccentric Loading Introduction Numerical Modeling Modeling of Piled-Raft-Soil System Boundary Condition and Mesh Pattern Test Program and Material Properties Validation Result and Discussion Effect of Number of Pile and Young’s Modulus of Sand on Vertically Loaded Piled-Raft Foundation Eccentric Vertical Load Carried by the Each Row Pile Variation of the Vertical Eccentric Load for the Different ES Values Load Sharing Mechanism Under Eccentric Loading Effect of the s/d Ratio on Ultimate Load Carrying Capacity Stress in Soil and Piled-Raft Conclusion References 12 Shape Optimization of Onshore Wind Turbine Foundations Introduction Design Data Modeling of the Foundation Results and Discussions Conclusion References 13 Analysis of Load Distribution Coefficient of Piled Raft System: A Numerical Approach Introduction Theoretical Background Numerical Simulation Numerical Model Configuration Validation of Developed Model Results Analysis of Load Distribution Coefficient Prediction Model of Load Distribution Coefficient Conclusion References 14 Effect of Slope Inclination on V-H and V-M Capacity Envelope of Strip Foundation on Undrained Clay Slope Introduction Problem Statement, FE Modeling and Analysis Results and Discussion V-H Capacity Envelope V-M Capacity Envelope Conclusion and Limitation References 15 Wind Turbine Foundation Using PHC Piles in Problematic Soil Introduction Background of the Study Pretensioned Spun High-Strength Concrete Piles (PHC) The Foundation System Pile–Soil–Structure Interaction Design Procedure Material Properties Finite Element Analysis Boundary Conditions Loads Results and Discussion Conclusions References 16 Effect of Super Structural Symmetry on Pile Foundations Under Pseudo-static Loading Introduction Materials and Modeling Finite Element Modeling Results and Discussions Conclusions References 17 Behavior of Pile in Sloped Grounds Under the Influence of Surcharge Loads Introduction Model Features and Validation Results and Discussion Conclusion References 18 Influence of Flexural Rigidity of Footing and Shear Strength of Supporting Soil on Internal Stresses in Foundation Introduction Laboratory Scale Load Tests Materials Used Experimental Setup Finite Element Analyses Results and Discussions Influence of Flexural Rigidity of Footing Influence of Shear Strength of Underlying Soil Relation Between Applied Stress and Bending Stress Comparison of Laboratory and Finite Element Analysis Results Constant Flexural Rigidity Varying Shear Strength Influence of Flexural Rigidity of Footing Conclusions References 19 Influence of Oil Spill on the Load–Settlement Behavior of Footings of Adjacent Structures Introduction Materials Used Soil Oil Square Model Footing Experimental Setup Testing Procedure Modified Direct Shear Test Relationship Between Quantity of Contaminant and Extent of Contamination Results and Discussion Influence of Oil Content on Shear Parameters Influence of Eccentricity of Contamination on Load Settlement Behavior of Footing Influence of Quantity of Contaminant on Load–Settlement Behavior of Footing Influence of Eccentricity of Contamination on the Tilt of Footing Influence of Quantity of Contaminant on the Tilt of Footing Reduction Factor Conclusions References 20 Behavior of Vertical and Battered Piles Under Combined Axial and Lateral Load Introduction Motivation and Objective Numerical Study Description of the Numerical Model Adopted in Present Study Validation of the Developed Numerical Model Present Study Results and Discussion Pile Behavior Under Lateral Load Pile Behavior Under Combined Axial and Lateral Load Regression Analysis Conclusions References 21 Footing Resting on Clayey Slopes Introduction The Material Used and Experimental Testing Methodology Results and Discussions Conclusions References 22 A Comparison of Solutions of Laterally Loaded Long Piles Using Subgrade Modulus Approach Introduction Description of Methods Pile and Soil Data Analysis Results and Discussion Conclusion and Recommendation References 23 An Overview of Large Capacity Pile Load Test: A Case Study Introduction Load Test Arrangements Simulation of Marine Conditions Reaction Piles and Frame Best Practices Borehole Stabilization Rate of Drilling Base Cleaning Pile Load Test Summary and Conclusions References 24 Influence of Soil Cover on Lateral Response of Rock-Socketed Piles Introduction Model Validation Parametric Study Influence of Soil Cover Length Sensitivity of Shear Strength Parameters on the Influence of Soil Cover Summary and Conclusions References 25 Analysis of Foundation System of the Taj Mahal Introduction History of Taj Structure and Foundation Repeated Repairs Previous Soil Investigation Soil Investigation by University of Roorkee [9] Previous Soil Investigation by (IIT) Roorkee University Well Foundation or Pile–Raft Foundation Analysis of Capacity of Foundation Dangers to Foundation of Taj Remedial Measures A Subsection Sample Conclusion References 26 Heritage Impact Assessment of the Subordinate Court Complex Near the David Yale and Joseph Hyner’s Tomb Introduction Monument and Site Context Monument Proposal Potential Threats Due to the Proposal Methodology Assessment and Evaluation Baseline Condition Assessment Value Assessment Structural Risk Assessment Permissible Limits Results and Recommendations Impact Assessment Impact of Location Impact of Activity Visual Impact Assessment Impact of Parking and Vehicular Movement Impact of Design and Material Impact of Construction Activity on Site Recommendations and Mitigative Measures References 27 Numerical Investigation on the Influence of Different Parameters on a Vegetated Slope—A Case Study Introduction Site Location Geology Theory Materials and Methods Numerical Model Results and Discussion Coupled Seepage and Stability Analysis Parametric Study Conclusions References 28 A Geotechnical Study on Failed Base Slab of Molasses Tank Introduction Foundation Details Test Program Laboratory Tests and Soil Description SPT Results Allowable Bearing Capacity of Natural Soil Calculation of Allowable Bearing Pressure at 3.25 m Depth Verification Against Bearing Capacity Failure Verification Against Degree of Compaction of the Filled-Up Soil Observations and Reasons for Failure of 24 m Diameter Molasses Tank Slabs Observations at Site Reasons of Failure of RCC Slab of Molasses Tank Conclusions and Remedial Measures References 29 Geotechnical Design and Execution of Driven Spun Piles in Estuarine Geology Introduction Spun Piles Overview Site Execution Application and Features Geotechnical Design Approach Challenges Faced in Geotechnical Design Geology Soft Clay Deposits Layered Soils Spatial Variation Liquefaction Site Constraints Overview Spatial and Vertical Variation of Geology Welding and Jointing of Pile Segments Conclusion References