NCHRP Report 697: Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils
View larger
  • Status: Final Book
  • Downloads: 109
NCHRP Report 697:
Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils
(2011)
Purchase Options
Purchase Options
Overview

Authors

Description

TRB's National Cooperative Highway Research Program (NCHRP) Report 697: Design Guidelines for Increasing the Lateral Resistance of Highway-Bridge Pile Foundations by Improving Weak Soils examines guidance for strengthening of soils to resist lateral forces on bridge pile foundations.

The report presents computational methods for assessing soil-strengthening options using finite-element analysis of single piles and pile groups and a simplified approach employing commercially available software.

Topics

  • Transportation — Design
  • Transportation — Bridges and Other Structures
  • Transportation — Geotechnology

Publication Info

118 pages | 8.5 x 11
Contents

Table of Contents

skim chapter
Front Matter i-x
Summary 1-2
Chapter 1 - Introduction 3-4
Chapter 2 - Available Ground Improvement Case Histories and Approaches 5-13
3.2 Geotechnical Site Characterization 14-14
3.3 Single Pile Test in Untreated Soil 15-22
3.5 Pile Group Testing Procedure 23-24
3.6 Pile Group Tests in Untreated Clay 25-31
3.7 Pile Group Load Tests Involving Jet Grouting 32-35
3.8 Pile Group Load Tests Involving Soil Mixing 36-36
3.9 Pile Group Load Tests Involving Flowable Fill 37-38
3.10 Pile Group Load Tests Involving Excavation and Replacement 39-47
3.11 Summary of Increased Resistance from Soil Improvement Methods and Cost Considerations 48-50
Chapter 4 - Finite Element Modeling of Single Pile Load Test 51-53
5.1 Pile Group FEM Mesh Design 54-55
5.3 Pile Group Model in Virgin Clay with Excavation 56-56
5.5 Pile Group Model with Jet Grouting 57-60
6.2 Mass Mix Depth Effect (Below the Cap) on Lateral Resistance 61-64
6.3 Mass Mix Length Effect (Beside the Cap) on Lateral Resistance 65-65
6.4 Jet Grout Depth Effect (Beside the Cap) on Lateral Resistance 66-67
6.6 Jet Grout Length Effect (Beside the Cap) on Soil Improvement 68-70
6.7 Material Strength Effect on Lateral Pile Group Resistance 71-71
6.8 Conclusions Based on Parametric Studies 72-75
7.2 Comparison with Results from Tests in Virgin Soil 76-78
7.4 Development of Simplified Method 79-84
7.5 Evaluation for Jet Grouting Cases 85-88
7.6 Design Recommendations 89-95
Chapter 8 - Conclusions 96-96
References 97-98
Appendix A - Schematic Drawings Showing the Layout of the 16 Lateral Pile Group Tests 99-107
Abbreviations used without definitions in TRB publications 108-108

Related Books more

More by the National Cooperative Highway Research Program more