Contents [ hide show ]. Cone penetration testing CPT is an in-situ test that is used to identify the soil type. In this test a cone penetrometer is pushed into the ground at a standard rate and data are recorded at regular intervals during penetration. A cone penetration test rig pushes the steel cone vertically into the ground. The cone penetrometer is instrumented to measure penetration resistance at the tip and friction in the shaft friction sleeve during penetration.
Dynamic Cone Penetration Test
CPT (Cone Penetration Tests) | Field Testing | GEO5 | Online Help
We were unable send the link to your email. Please check your email. During the penetration test the values of the cone resistance q c and the local skin friction f s , respectively are recorded. The cone resistance thus represents in general the resistance against penetration of a cone spike into the soil subsoil.
Cone Penetration Testing (CPT)
The Dynamic Cone Penetrometer DCP is an instrument designed for the rapid in-situ measurement of the structural properties of existing road pavements constructed of unbound materials. The robust and simple design means that the DCP is quick and easy to use, portable, low cost and suitable for use in locations where access may be difficult. This article discusses the history of the test, the safety concerns and geotechnical design limitations of the DCP in modern practice and provides alternative methods which must be considered by the Designer. The original DCP used a 15 lb weight dropping over 20 ins and used a 40 o cone.
Test Overview. The test is performed by driving a metal cone into the ground by repeated striking it with a The penetration of the cone is measured after each blow andis recorded to provide a continuous measure of shearing resistance up to 5 feet below the ground surface. Test results can be correlated to California Bearing Ratios, in-situ density, resilient modulus, and bearing capacity.