Geotechnical Engineering

Geotechnical Engineering

TTL geotechnical professionals provide field testing and drilling services, comprehensive soils laboratory testing, and geotechnical design and construction recommendations for structures, pavements, embankments and containment facilities.

Subsurface Investigations and Geotechnical Reports
  • Foundation Settlement
  • Retaining Walls
  • Flexible & Rigid Pavement Design
  • Slope Stability & Embankments
  • Groundwater Control & Drainage
  • Soil Permeability
Soil and Rock Laboratory Testing
  • Atterberg Limits
  • Grain Size Analysis
  • Unconfined Compressive Strength (Soil & Rock)
  • Moisture-density Relationship Determination (Proctors)
  • One-dimensional Consolidation
  • California Bearing Ratio (CBR)
  • Triaxial Shear Tests (UU and CU Strength)
  • Direct Shear
  • Specific Gravity
  • Flexible Wall & Constant Head Permeability
  • Electrical Resistivity
  • Organic Content by Loss On Ignition (LOI)
  • Lime and Cement Mix Design for Soil Stabilization
  • Slake Durability
Field Testing
  • Foundation Inspection
  • Field CBR Tests
  • Static Plate Load Tests
  • Field Resistivity Tests
  • Caisson Inspection
  • Pile-Driving and Load Testing Inspection
  • Rock Permeability Packer Testing

TTL determines the best and most economical design and construction recommendation solutions when sites contain poor soil conditions.

Featured Projects

Keweenaw Bay

TTL recently embarked to Keweenaw Bay approximately 12 miles southeast of Houghton  in the Upper Peninsula of Michigan to determine and characterize the subsurface conditions in regards to the strength, compressibility and potential for failure of the subsurface materials at the breakwater structure location. Field activities consisted of nine soil borings including six performed over water from a barge plant, and three on land. Vane shear tests were performed to collect in-situ shear strength data. Laboratory testing included soil classifications and index property tests. From the field and laboratory testing, TTL performed engineering analysis and provided design recommendations pertaining to the suitability of the encountered subgrade materials to support the design of the new breakwater structure

State Parks

This spring, TTL traveled to five state parks around Ohio to support waterline construction of the Ohio Department of Natural Resources, including Burr Oak Lodge in Glouster; Mohican Lodge in Perrysville; Punderson Manor Resort in Newberry Township; Shawnee Lodge in West Portsmouth; and Salt Fork Lodge in Cambridge. TTL perform 46 test borings, field and laboratory soil testing, and a geotechnical engineering evaluation of the data to evaluate the properties of the underlying soils and rock with respect to installation and support of the proposed water lines. For many boring locations, TTL had to traverse difficult (although beautiful) terrain, some of which was only accessible by foot, requiring much use of hand auger and housel hammer sampling methods.

Call Us:

  • Chris Iott, P.E.
  • Geotechnical Chief
  • 419.214.2222

Email Us

ciott@ttlassoc.com

Download Geotechnical Brochure

  • Curtis E. Roupe, P.E.
  • Geotechnical Manager
  • 419.214.2222

croupe@ttlassoc.com