- Setting TOR for the reviewing and updating process
o Organization of the Manual
o Depth of treatment of each issues
- Desk study of:
o existing manuals (all versions)
o related manuals
o guidelines and standards (national and international)
o related studies and research findings (national and international)
o gaps in the existing ERA Geotechnical Design manual.
▪ Aspect is treated as a sub-topic (A separate chapter should be devoted to
it as “ Landslide Analysis and Mitigation” containing
General/Introduction; Landslide Terminology (Landslide Dimensions,
Landslide Features); Landslide Susceptibility; Landslide monitoring and
Instrumentation; Geotechnical Investigation for landslide susceptible areas
(Field testing (+Geophysical Testing, Laboratory Testing); Development
of Design Parameters and other input data for landslide analysis (Static
and dynamic aspect); Landslide Mitigation Measures: Types, Selection,
Design, Construction Aspect; Design requirements (Static and dynamic
aspects); References)
▪ Geotechnical investigation aspect is missing (Spacing and layout, and
depth of test borings for landslide investigations considering the size and
nature of the landslide)
▪
- Discuss main findings and recommendations
- Update the design manual
- Conduct workshops
A separate chapter for Geosynthetic Design shall exist with the following sub
topics
Geosynthetic Design
• Introduction
• Geosynthetic Types, Characteristics, and Highway Applications
• Geosynthetic Functional and Application Design
• References used
A separate chapter for Geosynthetic Design shall exist with the following sub
topics
Retaining Structures
• Introduction
• Retaining wall practices and procedures (types, selection)
• Design requirements (Design principles; Design methods, Consideration of
compaction loads, surcharge loads, seismic loads, seismic hazards,
subsurface drainage, underground utilities, temporary shoring and cut slopes,
temporary retaining walls, corrosion protection, design life, foundation
serviceability criteria)
• Mechanical Stabilized Earth (MSE) Walls and Reinforced Slopes (General
Considerations, Geotechnical investigation, Wall Selection criteria, External
and internal stability analysis, drainage system designs, corrosion)
• Prefabricated Modular Walls
• Non-gravity walls (Cantilever and anchored - Soldier piles, sheet pile walls )
• Soil Nail Walls (General considerations, Design requirements, facing,
Corrosion protection, load testing Verification and proof test schedules)
• References
Appendix: (Design and Construction Requirements; Sample Design; Guidelines
for review of retaining wall design and calculations including geotechnical
investigation work)
Foundation Design
• General, standards and policies
• Foundation Selection Criteria
• Seismic design
• Footing, pile, drilled shaft, micropiles, construction considerations
• References
Culverts and Trenchless Technology Design
• General
• Culverts (Geotechnical requirements, Wing walls)
• Trenchless Utility Installation (List of different methods, Geotechnical
exploration for Trenchless Methods)
• References
Construction Recommendations and Reporting
• General
• Roadway Construction Support,
• Bridge Construction Support (Spread footing construction, Driven pile
construction, drilled shaft construction)
• References
Geotechnical Reporting and Documentation
• General
• General Reporting Requirement
• Quality Control
• Geotechnical Reporting Document Requirements (Geology documentation,
Geotechnical Memo, Geotechnical Reports)
• Geotechnical Data Sheets (Location of Geotechnical Data Sheets in Project
Plans, Sheet Layout and Content, Layout, Plan, Profile, Sections and Cross-
sections, Unit Descriptions)
• Structural Foundation Reporting Requirements (Spread Footing, Pile
Foundations, drilled shafts, geotechnical report check list for bridge
foundations, retaining walls)
• References
• Appendix: Geotechnical Report Review Checklist
Roadway Construction
•
•
