Recent Developments of Soil Mechanics and Geotechnics in Theory and Practice

Name: Recent Developments of Soil Mechanics and Geotechnics in Theory and Practice
Brand: Springer
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Theodoros Triantafyllidis(Herausgeber*in)

Springer (Verlag)

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Erschienen am 20. August 2019

IX, 409 Seiten

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978-3-030-28516-6 (ISBN)

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Inhalt

Intro
Preface
Contents
Constitutive and Numerical Modelling
Constitutive Modelling of Multiporous Lumpy Soils
1 Introduction
2 Lumpy Soil as a Granular Soil
3 Mixtures of Reconstituted Soils
4 Lumpy Soil Without Consolidation
5 Lumpy Soil During Consolidation
6 Concluding Remarks
References
A Constitutive Model with a Historiotropic Yield Surface for Sands
1 Introduction
2 Notation
3 The Hypoplastic Equation
4 Hyperelasticity
5 Model for Isotropic Compression
6 Constitutive Model with Historiotropic Yield Surface
6.1 Historiotropic Yield Surface g=0
6.2 Overconsolidation Ratio OCR
6.3 Generalized Taylor's Dilatancy Md
6.4 Characteristic Curves
6.5 Intensity of Anelastic Flow
6.6 Flow Rule m
6.7 Evolution of the State Variable B
7 Comparison of the Model with Experimental Results
7.1 Monotonic Triaxial Tests
7.2 Drained and Undrained Triaxial Tests on Loose Sand
7.3 Cyclic Triaxial Tests
7.4 Combination of Monotonic and Cyclic Loading
7.5 Cyclic Loading with Different Deformation Histories
8 Conclusions
References
Geomechanical Influences of Interface Dilatancy
Abstract
1 Introduction
2 Mathematical Modelling of the Contact Problem
3 The Shear of the Dilatant Circular Patch
4 Concluding Remarks
Acknowledgements
References
State-Dependent Dilatancy of Soils: Experimental Evidence and Constitutive Modeling
1 Introduction
2 From Direct Shear to General Conditions
3 Overview of Expressions Describing the State-Dependent Dilatancy of Cohesionless Soils
3.1 State-Dependent Dilatancy for Monotonic Loading Described by Li and Dafalias lid2000
3.2 State-Dependent Dilatancy Described by Grandas and Triantafyllidis grandas19
4 Experimental Findings Regarding the Dilatancy of Cohesive Soils
4.1 Basic Postulates
4.2 Triaxial Tests Under Monotonic Loading
4.3 Triaxial Tests Under Cyclic Loading
5 Constitutive Description of the Dilatancy of Cohesive Soils
5.1 Incorporation in a General Hypoplastic Model
5.2 Simulations
6 Concluding Remarks
References
On FE Modeling of Two-Phase Media Using the up-Discretization
1 Introduction
1.1 Notation
1.2 Strong Form of the Equilibrium and the Mass Conservation
1.3 Strong and Weak Forms of Equilibrium and Mass Conservation in 1D
1.4 Spatial Galerkin Discretization
1.5 Temporal Discretization with GN22 for u and GN11 for p
1.6 Temporal Discretization: GN22 for u and GN21 for p
1.7 Initial Static Equilibrium
1.8 FEM Implementation and Conclusion
References
Possibilities and Limitations of ALE Large Deformations Analyses in Geotechnical Engineering
Abstract
1 Introduction
2 ALE Methods
3 Practical Applications
3.1 Steel Pipe Buckling During Installation
3.2 Sand Column Collapse
4 Summary and Conclusions
Acknowledgments
References
Approaches for the Design of Foundations for Offshore Wind Turbines
Abstract
1 Introduction
2 Industry Standards for the Design of Foundations for Offshore Wind Turbines
3 Application of HCA Based Models for the Design of Offshore Wind Turbine Foundations
3.1 HCA Model
3.2 Validation of the HCA - Based Approach for Monopiles
3.3 Validation of the HCA - Based Approach for Gravity-Based Foundations
4 Comparison of HCA-Based Simulations with Other Standards
4.1 PISA Approach for Static Loading of Monopiles
4.2 Comparison with Models for Cyclic Monopile Design
Acknowledgments
References
Behaviour of Granular Soils Under Uni- and Multidimensional Drained High-Cyclic Loading
1 Introduction
2 Stress or Strain Amplitude, Soil Density and Average Stress
3 Grain Size Distribution Curve
4 Particle Characteristics
5 Content of Non-cohesive Fines or Shell Fragments
6 Sample Preparation Method
7 Bedding Plane Orientation
8 Sample Geometry and Dimensions
9 Multiple Changes of Polarization
10 Bundling of Cycles with Similar Amplitudes
11 Monotonic Loading Between Bundles of Cycles (Loss of Cyclic Preloading Memory)
12 Multi-dimensional Cyclic Loading
13 Summary, Conclusions and Outlook
References
Soil Dynamics and Structural Dynamics
Shear Wave Based Screening Method for Liquefaction Evaluation
Abstract
1 Introduction
2 Problems with Current Methods
3 Impact of Fines on Soil Liquefaction
4 Shear Wave Velocity Affected by Fines
4.1 Void Ratio-Dependent Shear Wave Velocity
4.2 State Parameter-Dependent Shear Wave Velocity
5 Evaluation of In Situ State
6 Validation Using Independent Tests
7 Conclusions
Acknowledgments
References
A Study on the Wave Dispersion in Concrete Due to Damage
Numerical Observations and Theoretical Predictions
Abstract
1 Introduction
2 Numerical Simulation Model
3 Results
4 Comparison with Experimental Data
5 Theoretical Predictions
5.1 Wave Dispersion Predictions via the Waterman and Truell Scattering Model
5.2 The Concrete as a Strain Gradient Elastic Material
6 Conclusions
References
Longitudinal Shock Waves in Soil
1 Introduction
2 Shock Formation. Plane Waves
3 Shock Formation. Cylindrical and Spherical Waves
4 Critical Distances in Soil
5 Shock Propagation
6 Viscous Shocks
7 Concluding Remarks
References
Renaturation of Open Cast Mining Areas
Geotechnical Aspects in Designing the Permanent Slopes of Future Lakes in Opencast Mines in the Rhenish Lignite Mining Area
Abstract
1 Recultivation in the Rhenish Mining Area
2 Opencast Mine Lakes in the Rhenish Mining Area
3 Principles of Opencast Mine-Lake Creation
4 Guideline for Stability Investigations
5 Seismic Impacts in Accordance with RfS
6 Slope Stability Analyses for Mine Lakes
7 Verification Procedure for Establishing Safety Against Soil Liquefaction
7.1 Opencast-Mine Field Investigations
7.2 Laboratory Tests
7.3 Technical-Centre Tests
7.4 Numerical Calculations
Next Steps and Acknowledgements
References
Coupled Numerical Simulations for Seismic Hazard Assessment of Large Opencast Slopes
1 Introduction
2 Governing Equations and Finite-Element Implementation
2.1 Theory of Porous Media
2.2 Balance Equations and Effective Stress Principle
2.3 Finite Element Implementation
2.4 Solution Procedure and SOE-Scaling
2.5 Compliant Base
3 Finite Element Model
3.1 Spatial Discretization
3.2 Material
4 Initial State and Loading History
4.1 Initial State
4.2 Loading History
5 Results
6 Summary and Future Perspective
A.1 Compliant Base Boundary Condition
A.2 Additional Simulation Results
References
Infrastructure Projects and Monitoring Concepts
Prediction and Control of Ground Deformations for Mechanized Tunneling in Clays with Mixed Face Conditions
Abstract
1 Introduction
2 Methodology
3 Face Stability
4 Ground Deformations Due to Face Pressures
5 Analyses of Other Sources of Ground Deformations
6 Model Evaluation
7 Conclusions
Acknowledgements
References
Two Neighbouring Tunnels in Saturated Soil Under Blast Loading
1 Introduction
2 Constitutive Description of the Soil
3 Boundary-Value Problem
4 Deformation of the Lining
5 Deformation of the Soil
6 Conclusion
References
In Situ Stress Assessment Based on Width and Depth of Brittle Borehole Breakouts
1 Introduction
2 Breakout Formation and Arrest
3 Solution of the Direct Problem
3.1 Method Outline
3.2 Scale Effects
3.3 Stress State Estimation: FEM vs Conformal Mapping
3.4 Comparison to Experiments
4 Numerical Method for Stress Assessment
5 Results
6 Discussion on the Feasibility of Stress Assessment
7 Conclusions
References
Foundation Engineering: Challenges and Achievements
Geotechnical Challenges for the Numerical Prediction of the Settlement Behaviour of Foundations in Rosenheim's Seeton
Abstract
1 Introduction
2 Geological and Geotechnical Subsoil Conditions
3 First and Second Pile Loading Test Campaign
4 Third Pile Testing Campaign
4.1 Concept Und Pile Instrumentation
4.2 Technical Specification for Pile Installation
4.3 "Healing" the Seeton After Pile Installation
4.4 Loading System and Instrumentation of the Pile Head
4.5 Execution of the Pile Loading Tests
4.6 Results of the PLT
5 Foundation Design
6 Prediction of the Deformation Behaviour of the Mixed Foundation
6.1 Material Model Parameter Calibration and Validation
6.2 Simulation of a Single Pile Load Test (P09)
6.3 Simulation of the Pylon Foundation
7 Final Remarks
References
Diaphragm Wall Technique - Planning, Execution and Development over the Last 65 Years
Abstract
1 Basics
2 Development of Equipment and Tools for Diaphragm Wall Execution
3 Supporting Fluids
4 Formation of Joints
5 Execution
6 Quality Assurance
7 Outlook
8 Chronological Development of the Diaphragm Wall Technique
Stability and Large Deformations of Slender Structures Supported by Soil Materials
Abstract
1 Introduction: Structural Stability and Soil-Structure-Interaction
2 Stability of Railway Track
3 Stability of Slender Piles in Soft Soil: Global Buckling
4 Stability of Soil Supported Offshore Piles: Local Buckling
5 Pile Tip Buckling of Tubular Steel Piles
6 Conclusions/Summary
Acknowledgments
References
Excavation Pits: Calculation Methods
Abstract
1 Introduction
2 Design Analysis
3 Extension with Modulus of Subgrade Reaction Method
4 Finite Element Calculations
5 Safety Considerations
6 Determination of Deformations
7 Further Information
References
Traces of Prof. Triantafyllidis in Bochum
Abstract
1 Introduction
2 Research Activities in Bochum
3 Further Work in Bochum on Characteristics of Filter Cakes Formed During Slurry Wall Installation
3.1 Work of Arwanitaki (2009)
3.2 Detection of Composition of Filter Cake Material
3.3 Influence of Time from Trench Excavation to Concreting
4 Further Work in Bochum with RC Device
4.1 Bochum RC Device
4.2 Modification of RC Device to Apply Anisotropic Stress Paths
4.2.1 Instrumentation to Apply Anisotropic Stress State
4.3 Calibration and Validation of Modified Device with Aluminum Specimen
4.4 Influence of Anisotropic Stress Path on Small Strain Stiffness of Pure Sand
5 Summary
References
Author Index

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