Proceedings of the 15th African Regional Conference on Soil Mechanics and Geotechnical Engineering: Resource and Infrastructure Geotechnics in Africa: Putting Theory into Practice

Preface......Page 6
Committees and Exhibitors......Page 8
Sponsors......Page 10
Contents......Page 12
Section 1. Keynote Lectures......Page 20
The Advances in Everyday Geotechnics in Southern Africa over the Past 40 Years......Page 22
Towards Developing Paving Materials Acceptance Specifications for Lateritic and Saprolitic Soils......Page 29
Use of Geosynthetics to Improve Seismic Performance of Earth Structures......Page 59
Section 2. Dams......Page 80
Pathology of Foundation of Ghezala Dam, a Tunisian Case History......Page 82
Injection of Contraction Joints at Pretarouca Dam......Page 90
Section 3. Environmental Engineering......Page 94
The Challenge of Designing & Constructing Steep Landfill Capping Sealing Systems Using Geogrid Veneer Reinforcement......Page 96
Design of Soil Covers in Tropical Africa: A Perspective......Page 102
Is There a Future for GCLs in Waste Barrier Systems?......Page 108
Design of Hazardous Waste Landfill Liners: Current Practice in South Africa......Page 116
Geosynthetic Clay Liners: A Useful New Tool for Environmental Protection in the Engineer's Toolbox......Page 123
Section 4. Foundations......Page 130
Numerical Modeling of Skirted Foundation Subjected to Earthquake Loading......Page 132
Prediction of the Axial Capacity of Bored Piles Using Methods Based on CPT and Static Analysis Approaches......Page 138
Case History on the Design of Foundation for Oil Storage Tank on Coastal Plain Sands......Page 146
Moment-Induced Displacement of Offshore Foundation in the Niger Delta......Page 152
Lateral Response of Suction Caissons in Deep Water Floating Structures off Niger Delta Coast......Page 158
Foundation Design and Construction for an LPG Terminal in a Difficult Geology and Constrained Waterfront in Coastal Lagos......Page 164
Variation of Hydrodynamic Forces and Moments on Offshore Piles in the Niger Delta......Page 171
Contribution a l'Analyse du Comportement des Pieux sous Chargement Vertical - Analyse d'Une Base de Donnees Locale......Page 177
The Use of Micropiles as Settlement Reducing Elements......Page 184
Rigid Inclusions in Sand Formation Resting on Compressible Clay......Page 194
Dynamically Loaded Foundations......Page 202
Construction of a Bridge over the Kwanza River at Cabala in Angola......Page 209
Case Studies to Support Recent Advances in Geogrid Technology......Page 215
Shaft Resistance of Model Pile in Wet Soil......Page 221
Section 5. Lateral Support and Retaining Structures......Page 232
The Effect of Anchor Post-Tensioning on the Behaviour of a Double Anchored Diaphragm Wall Embedded in Clay......Page 234
Observed Axial Loads in Soil Nails......Page 240
Deformations of Soil Reinforced Walls in Relationship with Reinforcement Used......Page 247
Performance Comparison of Vertical-Horizontal with Conventional Reinforced Soil Walls Using Numerical Modelling......Page 256
The Behaviour Under Excavation of the Luanda's Sandy Formation: Case Studies......Page 262
Theoretical Evaluation of the Influence of Cohesion on Lateral Support Design......Page 268
Internally Instrumented Soil Nail Pull Out Tests......Page 274
Reinforced Soil Retaining Wall Systems Reach New Heights in the Middle East......Page 281
Deep Excavations in Luanda City Centre......Page 288
Geotechnical Innovation in Shaft Sinking in the Zambian Copper Belt......Page 294
The Use of Reinforced Soil to Construct Steep Sided Slopes in Order to Create a Safer Highway - Ruhengeri to Gisenyi Road, Rwanda......Page 303
Section 6. Materials Testing......Page 310
Characterization of Shear Strength of Abandoned Dumpsite Soils, Orita-Aperin, Nigeria......Page 312
The Use of the Crumb Test as a Preliminary Indicator of Dispersive Soils......Page 318
Some Engineering Properties of Fine and Coarse Grained Soil Before and After Dynamic Compaction......Page 326
Using Electro-Osmosis Technique in the Improvement of a Ugandan Clay Soil......Page 332
Derived Empirical Relations and Models of Vital Geotechnical Engineering Parameters Based on Geophysical and Mechanical Methods of Testing......Page 339
Quantitative Analysis to Verify the Theory of Soil Particle Agglomeration and Its Influence on Strength and Deformation Resistance of Geomaterials......Page 349
Characterizing Bulk Modulus of Fine-Grained Subgrade Soils Under Large Capacity Construction Equipment......Page 356
Aspects Geologiques et Geotechniques Associes au Projet et a la Construction d'un Troncon de l'Autoroute de Dakar (Senegal)......Page 362
Characterization of Granular and Bitumen Stabilised Materials Using Triaxial Testing......Page 368
The Effect of Iron Oxide on the Strength of Soil/Concrete Interface......Page 374
Moisture Retention Characteristics of Some Mine Tailings......Page 379
Prediction of Over-Consolidated-Ratio for African Soil......Page 385
The Strength of Compacted Sand in a Modified Shear Box Apparatus......Page 395
Experimental Study on Use of Mechanically Stabilized Residual Soils for Pavement Layers in Magoe, Mozambique......Page 401
Effects of Compaction on Engineering Properties of Residual Soils of Tete - Mozambique......Page 408
Selection of Pavement Foundation Geomaterials for the Construction of a New Runway......Page 415
Suggested Improvements in Site Investigation and Numerical Characterization Procedures for House Foundation Design......Page 422
Section 7. Roads......Page 432
Improvement of Unbound Aggregates in Khartoum State......Page 434
Applying the Dynamic Cone Penetrometer (DCP) Design Method to Low Volume Roads......Page 441
The Use of a Sedimentological Technique for Assessing the Engineering Performance of Sands in Roads......Page 450
Characterization of Pozzolanic Geomaterial for the Construction of Pavement Structures of Songwe Airport in Tanzania......Page 458
Correlation Between the Dynamic Cone Penetration Index and the Falling Weight Deflectometer-Determined Subgrade Resilient Modulus......Page 465
Fundamental Theory of the ReCap Technique and Its Application in the Construction of Pavement Structures Within Problematic Soils......Page 472
Utilisation des Betons Compactes au Rouleau (BCR)......Page 479
Pavement Rehabilitation Options for Developing Countries with Marginal Road-Building Materials......Page 487
Applications of Participatory Road Maintenance Using "Do-nou" Technology in Kenya......Page 495
Modelisation Numerique du Renforcement des Chaussees non Revetues par Geogrille......Page 501
Reducing the Cost of Road Construction Through Targeted Geotechnical and Geophysical Investigations - A Case Study of Road Section Re-Design in the Hwereso Valley of Ghana......Page 508
Appropriate Engineering Solutions for Rural Roads in Mozambique......Page 514
Preliminary Studies on the Utilization of Sand Treated with Emulsion......Page 520
Geosynthetics in Road Pavement Reinforcement Applications......Page 526
Treatment and Stabilization of the National Road E.N. 379-1 Hillsides, Between Outao and Portinho da Arrabida......Page 537
Contraintes Geotechniques Associees a la Construction de la Deuxieme Piste de l'Aerodrome d'Oran en Algerie......Page 543
Effect of Geosynthetic on the Performance of Road Embankment on Algeria Sabkha Soils......Page 551
Section 8. Site Characterisation......Page 558
Geotechnical Characteristics of the Portuguese Triassic Mudstones......Page 560
Hydraulic Conductivity of Compacted Foundry Sand Treated with Bagasse Ash......Page 564
Subsurface Conditions in Central Khartoum......Page 570
An Alternative to the Re-Drive for Determining Rod Friction Exerted in DPSH Testing......Page 578
Empirical Equivalence Between SPT and DPSH Penetration Resistance Values......Page 584
The Dynamic Probe Super Heavy Penetrometer and its Correlation with the Standard Penetration Test......Page 590
The Potential of Using Artificial Neural Networks for Prediction of Blue Nile Soil Profile in Khartoum State......Page 599
Using a Modified Plate Load Test to Eliminate the Effect of Bedding Errors......Page 606
Geotechnical Characterization and Design Considerations in the Moatize Coalfields, Mozambique......Page 612
Estimating the Heave of Clays......Page 618
Instrumentation and Monitoring During Construction of the Ingula Power Caverns......Page 624
Piezocone Investigation of Paleo River Channels at Changane River, Mozambique, for a Railway Embankment......Page 630
Site Selection of the Mathemele Landfill......Page 639
Hazard Assessment on Shallow Dolomite......Page 645
Correlations of DCPT and SPT for Analysis and Design of Foundations......Page 651
The Effective Porosity Paradigm and the Implications on Empirical Permeability Estimations......Page 657
Numerical Modelling of Wave Propagation in Ground Using Non-Reflecting Boundaries......Page 663
Geotechnical Characteristics of the Red Sands of Chibuto, Mozambique......Page 672
Simple Expansion Model Applied to Soils from Three Sites......Page 682
Correlation Studies Between SPT and Pressuremeter Tests......Page 688
Section 9. Slopes......Page 696
The Value of Slope Failure Back-Analysis in Open-Pit Slope Design: A Case History from the South African Coalfields......Page 698
General Slope Stability Using Interslice Forces and Flow Nets but Avoiding ru Factors......Page 704
Pit Slope Design Near Tete, Mozambique, Without the Benefit of Previous Slope Performance Experience......Page 710
Section 10. General......Page 718
Equations et Exemple de Calcul Hydrique dans les Sols Non Satures......Page 720
Processus de la consolidation des sols peu coherents satures......Page 728
The African Regional Conferences as an Indicator of Research Trends in South Africa......Page 738
Geotechnical Investigations: Over-Regulated or Under-Investigated?......Page 745
Challenges to Geotechnical Engineering Practice in the Urbanization of the City of Accra, Ghana......Page 749
Soil Improvement Through the Utilization of Agricultural Residues from Nigeria......Page 755
Subject Index......Page 762
Author Index......Page 766