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. Daugherty, Jami Lynn. Edwards, Lulu. |
| Keywords: | Soil Strength Soil penetration test Soils--Testing Compaction Dynamic Cone Penetrometer Automated Soil mechanics Bearing capacity California Bearing Ratio 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 |
| Size: | 152 pages / 20.06 MB |
| Types of Materials: | |
| Appears in Collections: | Technical Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ERDC-GSL TR-22-16.pdf | 20.06 MB | Adobe PDF |  View/Open |