DPL (Dinamic Probing Light)

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What is the DPL Test?

The Dynamic Probing Light (DPL) test is a field method used to evaluate soil resistance by driving a metal cone into the ground.

It involves equipment consisting of a steel rod and a 10 kg hammer that is dropped from a standard height of 50 cm. The test records the number of blows required to reach specific depths, allowing for the characterization of the soil's relative compaction.

Advantages of the DPL Test

Accessibility: Ideal for sites with limited access where traditional equipment cannot be used.
Speed and cost-effectiveness: Provides reliable data quickly and at a low cost.
No sample recovery required: Unlike the SPT, the DPL does not extract soil but focuses on penetration resistance.

Important Considerations

Depth limitations: Suitable for depths of up to 8 meters.
Soil type: Not recommended for very hard or rocky soils that prevent cone penetration.
Complementary use: The DPL does not replace the SPT; both have specific applications depending on the project.

Field Examples of the DPL Test

Here are real images of the Dynamic Probing Light (DPL) test being performed in the field. This method uses a compact, manual, and easy-to-transport device, ideal for areas with limited access where heavy machinery or tests like the SPT cannot be used. The images show both the testing procedure and the interpreted results, displayed in graphic profiles that reflect the relative resistance of the soil.

Field application of the DPL test in natural terrain

Geo Costa Rica – Environmental Consultants

Processing, monitoring, and environmental consulting in hydrogeological studies, natural hazards, well drilling, water concessions, and Environmental Impact Assessments.