Geotechnical

CQuest has completed geotechnical investigations for many types of sites and structures:

  • Commercial and Retail Buildings

  • Cellular Towers

  • Warehouses

  • Electric Vehicle Charging Stations

  • Electrical Substation Equipment

  • Multi-Storied Office Buildings

  • Housing Developments

  • Large and Small Building Additions

  • Single Family Homes

  • Solar Farms

  • Windmills

  • Road Projects

Field Investigations

Geotechnical Investigations include subsurface field investigations, laboratory testing, and geotechnical analyses. CQuest’s subsurface investigations define the stratification of the subsurface soils and the engineering properties of these soils across the proposed construction area. CQuest uses its extensive knowledge of local geology to prepare these subsurface investigations in a cost-effective and efficient manner.  During subsurface investigations, test borings or test pits are excavated by one of CQuest’s professional drilling or excavating subcontractors. These test borings and pits provide CQuest with the information necessary for proper evaluation of the subsurface soils at the site. CQuest’s direct oversight of each subsurface investigation allows for quick, efficient changes in the investigation plan, should the need arise.

As part of the geotechnical investigation, CQuest’s laboratory-testing program is tailored to the soils and /or rock found at each site.  This enables our geotechnical team to fully define the physical characteristics of the subsurface materials encountered during the subsurface investigation. Soil testing may include any of the following analyses:

  • Atterberg Limits

  • Resistivity

  • Soil density

  • California Bearing Ratio

  • Gradations

  • Consolidations

  • Direct shear

  • Electrical Resistivity

  • Hydraulic Conductivity

  • Hydrometer

  • Moisture content

  • Permeability

  • Triaxial shear tests

  • Unconfined compression

  • pH

Geotechnical Engineering Reports

Based on the results of the subsurface investigation and the laboratory testing program, CQuest performs an analysis of the subsurface soils and/or bedrock. CQuest then prepares a final Geotechnical Investigation Report, which summarizes the subsurface investigation, on-site soil strength conditions, and gives recommendations for foundations, earthwork, slope stability and pavement sections.

Additional Subsurface Investigation Services available

CQuest conducts infiltration testing to determine the potential infiltration feasibility of a site, as well as helping the system designer properly size and locate the proposed storm water management facilities. Infiltration testing is performed per the guidelines of the local governing agencies. 

CQuest conducts percolation testing to aid in the location and design of onsite wastewater treatment systems, also known as private sewage disposal systems. Testing is performed for the design of systems including seepage pits, leach lines and pressurized drip systems. The location of dispersal systems on hillside and flat land properties are geologically evaluated for feasibility and stability.

CQuest evaluates sites with regard to the potential of liquefaction, including settlement, lateral spreading, and their resulting effects and impacts on the proposed development and provides recommendations to mitigate the effects of liquefaction on the proposed development.