Proceedings of the 15th African Regional Conference on Soil Mechanics and Geotechnical Engineering: resource and infrastructure geotechnics in Africa ; putting theory into practice ; [94 papers and 3 keynote lectures presented at the 15th African Regional

This volume contains 94 papers and 3 keynote lectures presented at the 15th African Regional Conference on Soil Mechanics and Geotechnical Engineering, held in Maputo, Mozambique on 18-21 July 2011. The general theme of the conference was Resource and Infrastructure Geotechnics in Africa: Putting Theory into Practice. The papers are divided into the following sections: Dams, Environmental Engineering, Foundations, Lateral Support and Retaining Structures, Materials Testing, Roads, Site Characterisation and Slopes. This publication is of interest to academics and practitioners in the field of soil mechanics, geotechnical and ground engineering.IOS Press is an international science, technical and medical publisher of high-quality books for academics, scientists, and professionals in all fields. Some of the areas we publish in: -Biomedicine -Oncology -Artificial intelligence -Databases and information systems -Maritime engineering -Nanotechnology -Geoengineering -All aspects of physics -E-governance -E-commerce -The knowledge economy -Urban studies -Arms control -Understanding and responding to terrorism -Medical informatics -Computer Sciences 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 Resource And Infrastructure Geotechnics In Af. This Volume Contains 94 Papers And 3 Keynote Lectures Presented At The 15th African Regional Conference On Soil Mechanics And Geotechnical Engineering, Held In Maputo, Mozambique On 18-21 July 2011. The General Theme Of The Conference Was Resource And I