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Geotechnical Inspection


Any project involving load transfer to soil requires the underlying soils to be tested for bearing capacity and classified prior to the design of the foundation. In order to satisfy code requirements, subsurface exploration methods are to be selected by the design professional..

The number of code-mandated tests is based on the square footage of the project,and the locations of such tests are to be uniformly distributed throughout the project area where the loads would be imposed to the soils.

Depending on the condition of the soils, additional testing may also be required by the design professionals to evaluate slope stability, stratigraphy, soil-bearing capacity, and/or instability due to liquefaction.

Results obtained from pre-construction geotechnical investigations form the basis for the design of project foundations. The design may then require the installation of pile foundations, footings, compacted fills, or any combination thereof. In instances where a project is being constructed on slopes, soil stabilization may also be required.

Building codes then require the inspection of foundation work during installation to ensure the soil conditions projected by the design are in place. Additionally, installation of the foundations is to be inspected during construction to confirm the workperformed meets the requirements of the contract documents and the local codes.

There are few things that can be worse for a construction project than to complete a project without having performed the required geotechnical analysis or inspection of the foundation work.

We can support you project with qualified geotechnical engineers to meet the needs of the project and the code.


Some of the inspection services and field tests that can be performed are:

  • Soil boring and test pit inspections with accompanying engineering report
  • Soil erosion and sediment control inspections
  • Inspection of pile foundations during driving operations
  • Video inspection of caissons
  • Inspection and monitoring of pile load tests
  • Inspection of soil stabilization and stabilitymethods
  • In-situ inspection for the quality and mechanical strength of soils
  • Soil percolation / water infiltration testing
  • Inspection of subgrade and foundation work


Other services can be performed to meet the needs of your project. Engage with an AEIS expert to discuss your project requirements and ensure a smooth inspection process.

Codes, Standards & Specifications

Geotechnical References

  • Perform or monitor subsurface investigations such as borings and test pits. Provide engineering reports that comply with NYCBC 1803.6 for the design professional’s use for the design of foundation work. Furnish a completed NYCBC TR4 technical report (or other as required by local building agency).
  • Sampling of soils via standard penetration test (SPT) or split barrel. 
  • Sampling of soils via thin walled-tube for geotechnical evaluation.
  • Determine flow of groundwater through soils by performing a soil percolation test or a double ring-infiltrometer test if required by the design professional.
  • Testing the quality of in-place soils by performing an in-situ California bearing ratio (CBR) test. This is the most commonly requested test by the design professional for the evaluation and design of flexible pavement components such as base and subbase courses.
  • Monitor pile installation and record results to comply with local codes. Furnish a completed NYCBC TR5 technical report.
  • Monitor helical pile installations and providea NYCBC TR5H technical report.
  • Monitor pile load testing for conformance with NYCBC or ASTM standards depending on project requirements.
  • Inspection of the methods employed to protect the sides of an excavation (e.g. sheeting, shoring and bracing). To avoid settlement of an existing adjacent structure due to the presence of an excavation area, the contractor must not remove any lateral support from the existing structure. A plan is to be submitted by the contractor, signed by a Professional Engineer, and AEIS will inspect to verify the submitted plan is followed to avoid damage to existing structure.
  • Underpinning may be required as part of as part of the excavation process. AEIS engineers will ensure the underpinning system is installed as designed.
  • Determination of in-place density and moisture content of soils & soil aggregates by nuclear methods (shallow depth). 
  • Other services can be performed to meet the needs of your project. If you have any questions regarding services your project requires, please contact us to discuss how AEIS can meet your needs.

Typical Geotechnical references in project specifications:

  • New York State DOT Geotechnical Design Manual.
  • New York City Building Code.

New York City Building Code section references(Partial listing):

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