The Geotechnical Engineering Division is responsible for performing geotechnical investigations and providing recommendations for the design and construction of roadways and structures for INDOT. Geotechnical investigations include soil borings, sampling, testing, and engineering analyses. Geotechnical investigations evaluate the subsurface conditions in order to provide recommendations for a suitable and economical foundation design.
This division is also responsible for the review of geotechnical reports prepared by geotechnical consultants for local agency projects on the National Highway System and state routes.
The Geotechnical Engineering Division handles all matters related to Geotechnical Engineering for INDOT. These matters may include:
- Structure Foundation: Pile driving systems, proof testing of rock, light weight fill, integrity testing, etc.
- Embankment: Light weight cellular concrete, reinforced earth, shale, use of waste products, slope stability, etc.
- Mechanically Stabilized Earth (MSE) Walls: Design and review
- Ground Modification: Stone columns, lime/cement/fly ash, dynamic compaction, grout injection, etc.
- Landslide: Investigation, monitoring, and correction
- Geosynthetic Materials: Geogrids and geotextiles
- Other issues: Including sinkholes, mine subsidence, retention/detention pond, peat/marl problem, erosion control, instrumentation, settlement.
- Standard Specifications and Special Provisions for geotechnical issues
Geotechnical Design Manual
- Chapter 1 Introduction
- Chapter 2 Geology and Pedology
- Chapter 3 Geotechnical Investigation and Sampling
- Chapter 4 Field Identification and In-situ Testing
- Chapter 5 Lab Testing
- Chapter 6 Geotechnical Analysis
- Chapter 7 Design Recommendations
- Chapter 8 Geotechnical Report
- Appendix A – Description of Geotechnical Pay Items
- Appendix D – Schedule of Geotechnical Pay Items
- References and Appendices 1 - 21
Guidelines and Design Memos
- Design Procedures for Soil Modification or Stabilization
- Geosynthetics Guidance
- Geotextile Selection Guidelines
- GDM 2021-02 QA/QC Method for Soil Fill Section and for Subgrade Construction-Section 218
- GDM 2021-03 Cement Stabilized Subgrade-Section 219
- Identifying Indiana Landslides
- Indiana Design Manual: Geotechnical Procedures
- Indiana Test Methods
- Percolation & Infiltration Guidelines
Forms and Checklists
- Dynamic Cone Penetration Field Log
- Dynamic Cone Penetration Field Log Example
- MSE Wall Construction Checklist
- MSE Wall Design Review Checklist
- MSE Walls Shop Drawings Review Process and Checklist
- Pile Driving System Approval Form
- Topsoil Analysis Results Table
- Infiltration Testing Construction Detail (ITM 517)
- Percolation Test Field Form (ITM 517)
Qualified Consultants and Approved Materials
- Qualified Geotechnical Consultants
- Qualified Products Lists & Qualified Sources Lists
- Drilling and Sampling Requirements
- Laboratory Requirements
Geotechnical Conferences
2020 Geotechnical Protocals for Geotechnical Consultants
- An Overview of 7.1 Geotechnical Engineering Services
- Construction Testing Issues and Reports
- Consultant Prequalification Manual – 7.1 Geotech Engineering
- Geotech INDOT Right of Way Permitting
- Geotechnical Design & Construction
- Geotechnical Manual Updates and Drilling Inspections
- Geotechnical Services Division
- Landslide Investigations and Reports
- MSE Walls Design in Indiana
- What Bridge Engineers Like To See In a Geotechnical Report
2021 Geotechnical Conference
- Overview of Geotechnical Engineering Division and Responsibilities
- Overview of 7.1 Pre-Qualifications for Geotechnical Engineering Firms
- Online Process of Soil Samples for Resilient Modulus Testing
- Geotechnical Division Website and Pavement Core Application
- Geotechnical Design and Consultant Agreements
- Purchase Orders and Invoices
- Geotechnical Conf-Bridge Engineering Overview
- 2021 Geotechnical Conference 02-24-20021 Vincennes Presentation
- Geotech Conference Discussion Ft. Wayne
- Subgrade Standard Specification and ITM Update
- Landslide Prioritizing and Selecting