Excavation Observations
SK Geotechnical provides on-site subgrade and excavation observations during construction of buildings, highways, and embankments. These engineering observations, commonly referred to as "foundation special inspection," are a critical component to evaluate proper foundation, slab, and pavement support.
Purpose of On-Site Excavation Observations
- Confirm the soils encountered on the site are similar to those encountered by the geotechnical evaluation.
- Observe the removal of unsuitable existing fill, topsoil, and excessively soft/compressible soils from beneath foundations and slabs.
- Perform strength tests on the footing and floor subgrades to further evaluate bearing capacity and suitability.
High groundwater in excavation
Purpose of Pavement Subgrade Observations
- Perform proof-rolling observations to identify unstable areas, which can cause delays during construction.
- Provide subgrade stabilization alternatives such as
- Geotextile/geogrid sections
- Subexcavation and replacement
- Cement or lime treatment
Geogrid stabilization of soft subgrade
Residential subexcavation to
gravel