Methods of Soft Ground Improvement eirit.co.il（eirit.co.il软弱地基的方法改进）.pdf

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Methods of Soft Ground Improvement eirit.co.il（eirit.co.il软弱地基的方法改进）.pdf

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Methods of Soft Ground Improvement eirit.co.il（eirit.co.il软弱地基的方法改进）

12 Methods of Soft Ground Improvement James D. Hussin CONTENTS 12.1 Introduction 530 12.2 Compaction 531 12.2.1 Dynamic Compaction 531 12.2.2 Vibro Compaction 533 12.2.3 Compaction Grouting 536 12.2.4 Surcharging with Prefabricated Vertical Drains 539 12.2.5 Infrequently-Used Compaction Techniques 540 12.2.5.1 Blast-Densification and Vacuum-Induced Consolidation 540 12.3 Reinforcement 541 12.3.1 Stone Columns 541 12.3.2 Vibro Concrete Columns 543 12.3.3 Soil Nailing 545 12.3.4 Micropiles 547 12.3.5 Fracture Grouting 549 12.3.6 Infrequently-Used Reinforcement Techniques 551 12.3.6.1 Fibers and Biotechnical 551 12.4 Fixation 552 12.4.1 Permeation Grouting 552 12.4.2 Jet Grouting 554 12.4.3 Soil Mixing 556 12.4.3.1 Dry Soil Mixing 558 12.4.3.2 Wet Soil Mixing 559 12.4.4 Infrequently-Used Fixation Techniques 560 12.4.4.1 Freezing and Vitrification 560 12.5 Other Innovative Soft-Ground Improvements Techniques 560 12.5.1 Rammed Aggregate Piers 560 12.5.2 Reinforced Soil Foundations 562 12.5.2.1 Mechanisms of Bearing Capacity Failure in Reinforced Soils 563 References 565 529 © 2006 by Taylor Francis Group, LLC 530 The Foundation Engineering Handbook 12.1 Introduction When a suitable foundation has to be designed for a superstructure