Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/44704
Title: Validation of the automatic dynamic cone penetrometer
Authors: Berney, Ernest S.
Edwards, Lulu
Daugherty, Jami Lynn
Keywords: Soil
Strength
Soil penetration test
Soils--Testing
Compaction
Dynamic Cone Penetrometer
Automated
Soil mechanics
Bearing capacity
California Bearing Ratio (CBR)
Fast
Shear strength of soils
Penetrometers--Evaluation
Publisher: Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/GSL TR-22-16
Abstract: The U.S. military requires a rapid means of measuring subsurface soil strength for construction and repair of expeditionary pavement surfaces. Traditionally, a dynamic cone penetrometer (DCP) has served this purpose, providing strength with depth profiles in natural and prepared pavement surfaces. To improve upon this device, the Engineer Research and Development Center (ERDC) validated a new battery-powered automatic dynamic cone penetrometer (A-DCP) apparatus that automates the driving process by using a motor-driven hammering cap placed on top of a traditional DCP rod. The device improves upon a traditional DCP by applying three to four blows per second while digitally recording depth, blow count, and California Bearing Ratio (CBR). An integrated Global Positioning Sensor (GPS) and Bluetooth® connection allow for real-time data capture and stationing. Similarities were illustrated between the DCP and the A-DCP by generation of a new A-DCP calibration curve. This curve relates penetration rate to field CBR that nearly follows the DCP calibration with the exception of a slight offset. Field testing of the A-DCP showed less variability and more consistent strength measurement with depth at a speed five times greater than that of the DCP with minimal physical exertion by the operator.
Description: Technical Report
Gov't Doc #: ERDC/GSL TR-22-16
Rights: Approved for Public Release; Distribution is Unlimited
URI: https://hdl.handle.net/11681/44704
http://dx.doi.org/10.21079/11681/44704
Appears in Collections:Technical Report

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