The cone penetration or cone penetrometer test CPT is a method used to determine the geotechnical engineering properties of soils and delineating soil stratigraphy. It was initially developed in the s at the Dutch Laboratory for Soil Mechanics in Delft to investigate soft soils. Based on this history it has also been called the "Dutch cone test". Today, the CPT is one of the most used and accepted soil methods for soil investigation worldwide. The test method consists of pushing an instrumented cone, with the tip facing down, into the ground at a controlled rate controlled between 1.
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A Cone Penetration Test CPT is commonly used to determine the subsurface stratigraphy in situ in place and to estimate geotechnical parameters of the materials present. Geotechnical engineers typically use it to determine the necessary construction requirements for infrastructure — roadbeds, bridges, buildings. Due to the sensitive electronics inside the cone, it must be pushed to depth by static push methods. Common measurements being collected are cone tip pressure, sleeve friction, pore pressure and tilt angle. Additional sensors can be added like seismic, or other geo-environmental logging tools.
Need Geotechnical Equipment? Request a quote. Pricing information and quote request on Geotechgate. The cone penetration test CPT is a common in situ testing method used to determine the geotechnical engineering properties of soils and assessing subsurface stratigraphy.