1 –  INTRODUCTION

1.1  Background
1.2  Objectives
1.3  Scope
1.4  Approach


2 –  FOUNDATION ENGINEERING PROJECT

2.1  Background
2.2  Objectives
2.3  Scope
2.4  Project Description
2.5  Structural Consequences of Foundation Movements
2.5.1  Preliminary Studies
2.5.2  FHWA Tolerable Movement Study
2.5.3  Publications and Implementation Items
2.6  Pile Foundations
2.6.1  Areas of Emphasis
2.6.2  Single Piles in Clay
2.6.3  Single Piles in Sand
2.6.4  Allowable Stresses in Piles
2.6.5  Performance of Pile Driving Systems
2.6.6  Pile Wave Equation Technology
2.6.6.1  Pile Capacity Prediction
2.6.6.2  Simplified Capacity Predictions
2.6.7  Micropiles
2.6.7.1  State-of-the-Practice Review
2.6.7.2  Seismic Behavior of Micropiles
2.6.8  Publications and Implementation Items
2.7  Pile Groups
2.7.1  Pile Groups in Clay
2.7.2  Pile Groups in Sand
2.7.3  Predictive Model for Pile Group Design and Analysis (PILGP1)
2.7.4  In-Service Monitoring of Pile Groups
2.7.5  Model Testing
2.7.6  Centrifuge Model Testing
2.7.7  Lateral Loads on Pile Groups
2.7.8  Publications and Implementation Items
2.8  Drilled Shafts
2.8.1  Nondestructive Evaluation (NDE) of Drilled Shafts
2.8.2  Drilled Shafts in Intermediate Geomaterials
2.8.3  Free Fall of Concrete in Drilled Shafts
2.8.4  Load and Resistance Factor Design of Drilled Shafts
2.8.5  Publications and Implementation Items
2.9  Spread Footings
2.9.1  Performance Evaluation Studies
2.9.2  FHWA Staff Research on Spread Footings
2.9.3  Dynamic Testing of Footings
2.9.4  Publications and Implementation Items
2.10  Foundation Load Testing
2.10.1  Statnamic Load Testing
2.10.2  Osterberg Cell Load Testing
2.10.3  Dynamic Drop Weight Load Testing


3 –  GROUND IMPROVEMENT PROJECT

3.1  Background
3.2  Objectives
3.3  Scope
3.4  Project Description
3.5  Soil Reinforcement
3.5.1  NCHRP Benchmark Study
3.5.2  Reinforced Soil Structures
3.5.3  Reinforced Soil Foundations (RSF)
3.5.4  Geosynthetic Reinforced Soil Structures
3.5.4.1  Full-Scale Pier Project
3.5.4.2  Model Studies
3.5.5  Corrosion and Durability
3.5.6  Permanent Ground Anchors
3.5.7  Soil Nailing
3.6  Soil Treatment
3.6.1  Stone Columns
3.6.2  Dynamic Compaction
3.6.3  Prefabricated Vertical Drains
3.7  Publications and Implementation Items


4 –  SOIL AND ROCK BEHAVIOR PROJECT

4.1  Background
4.2  Objectives
4.3  Scope
4.4  Project Description
4.5  Expansive Clays and Shales
4.6  Soil Compaction
4.6.1  FHWA Compaction Aids Research
4.6.2  Soil Stiffness Gauge
4.7  Soil Stabilization
4.7.1  Soil Stabilization Manual
4.7.2  Lime Stabilization Research
4.8  Frost Heave and Thaw Weakening Damage
4.8.1  Differential Heaving
4.8.2  Thaw Weakening
4.8.3  Coordinated Research Efforts
4.9  Performance of Problem Ground Materials
4.9.1  Shale Embankment Research
4.9.2  Rockfall Hazard Mitigation
4.10  Publications and Implementation Items


5 –  GEOTECHNICAL STAND-ALONE STUDIES

5.1  Background
5.2  Automated Geotechnical Information and Design System
5.2.1  Deep Foundations Load Test Data Base
5.2.2  Shallow Foundations Data Base
5.2.3  Ground Improvement Data Base
5.2.4  Supplemental Data Bases
5.3  National Geotechnical Experimentation Sites (NGES)
5.4  Evaluation and Improvement of Bridge Foundations
5.4.1  FHWA Research Study
5.4.2  Unknown Bridge Foundations
5.5  Geotechnical Risk and Reliability
5.6  In-Situ Soil Testing
5.6.1  Stepped Bladed Vane
5.6.2  Simplified Torsional Cylindrical Impulse Shear Test
5.6.3  Controlled Source Spectral Analysis of Surface Waves (CSSASW)
5.6.4  Multiple Deployment Model Pile
5.7  Seismic Design of Highway Bridge Foundations


6 –  ASSOCIATED GEOTECHNICAL RESEARCH AND
TECHNOLOGY PROGRAMS

6.1  National Highway Institute (NHI)
6.2  FHWA Office of International Programs
6.3  Transportation Research Board (TRB)
6.4  National Cooperative Highway Research Program (NCHRP)
6.5  American Association of State Highway and Transportation Officials
(AASHTO)

6.6  The Highway Innovative Technology Evaluation Center (HITEC)
6.7  Electric Power Research Institute (EPRI)


7 –  TECHNOLOGY TRANSFER

7.1  Demonstration Projects Program
7.2  Problems
7.3  Solutions
7.4  Observations
7.5  Examples of Success
7.5.1  Foundations
7.5.2  Retaining Walls
7.6  More Examples of Success


8 –  CONCLUSIONS


APPENDIX A – FUTURE GEOTECHNOLOGY RESEARCH PROGRAM


APPENDIX B – TUNNELING GEOTECHNOLOGY


APPENDIX C – GEOTECHNICAL FACILITIES AT TFHRC


APPENDIX D – PROGRAM AWARDS


REFERENCES


LIST OF FIGURES

1.    Significant shimming beneath bearing device
2.    Bridge girder jammed against abutment and excessive rocker tilt
3.    Lab instrumentation of a pipe pile for field load testing in clay
4.    Field instrumentation of a pipe pile for field load test in sand
5.    Concrete piles damaged by difficult driving conditions
6.    Steel H-piles badly damaged by hard driving
7.    Installing pile driving analyzer (PDA) instrumentation
8.    Close-up view of single pile load test in sand
9.    Exhumed micropile
10.  Load testing of micropiles in California
11.  Pile group load test in clay
12.  Reaction frame for pile group load test in sand
13.  Instrumentation bore holes adjacent to pile group
14.  Load/settlement for Natchez Trace Parkway bridge
15.  Load test on small-scale model pile group in test tank
16.  Load test on large-scale model pile group in test pit
17.  Full-scale drilled shafts for NDE study at Texas A&M test site
18.  Vertical load test of defective drilled shaft
19.  Instrumented drilled shaft showing man-made defect and
NDE access tubes
20.  Low-strain impact test with instrumented hammer and geophone sensor
21.  Schematic of instrumentation plan for spread footing performance
evaluation study
22.  Load testing of large model spread footing
23.  Schematic of statnamic load test method
24.  Vertical statnamic load test on model pile group at TFHRC
25.  Osterberg load cell ready for placement in drilled shaft
26.  Large-strain dynamic load testing using drop hammer
27.  Reinforced soil test wall
28.  Spread footing load test on reinforced soil foundation
29.  Geosynthetic reinforced soil support pier
30.  Polarization Resistance (PR) monitor for corrosion potential
31.  Large model ground anchor test wall
32.  Full-scale ground anchor test wall at TAMU NGES
33.  Installation of instrumented soil nail at Cumberland Gap site
34.  Failed soil nail wall due to undercutting
35.  Schematic of dynamic compaction methodology
36.  Wick drains being installed at an embankment on soft clay site
37.  Pavement damage due to expansive subgrade soils
38.  Soil Stiffness Gauge
39.  Schematic of SSG showing the major internal components
40.  Pavement damage due to frost heave
41.  Shale embankment failure on I-64 in Indiana
42.  Bus badly damaged by large boulder at rockfall site
43.  Automated Geotechnical Information and Design System
44.  Close-up view of step bladed vane
45.  Torsional impulse shear test to obtain earthquake engineering soil
parameters at Treasure Island
46.  Controlled source spectral analysis of surface waves (CSSASW) testing
at Treasure Island
47.  Liquefaction damage due to Loma Prieta earthquake
48.  Tour group at the GT outdoor facility
49.  Pile driving of model piles at TFHRC
50.  Lateral statnamic load test on model pile group at TFHRC
51.  Spread footing load test
52.  Plate load test
53.  Presentation of TFHRC Outstanding Technical Accomplishment award