DIN EN ISO 22476-2 PDF Download

The DIN EN ISO 22476-2 standard provides requirements for conducting indirect investigations of soil using dynamic probing. This standard is in accordance with EN 1997-1 and EN 1997-2, which relate to geotechnical investigation and testing.

The purpose of this standard is to determine the resistance of soils and soft rocks in situ to dynamic penetration using a cone. A hammer with a specified mass and height of fall is used to drive the cone into the ground. The penetration resistance is measured by counting the number of blows required to drive the cone a defined distance. This standard includes four procedures, ranging from dynamic probing light (DPL) to dynamic probing super heavy (DPSH), which cover a wide range of specific work per blow.

It is important to note that this standard does not involve the recovery of soil samples. Instead, it provides a continuous record of penetration resistance with respect to depth. The results obtained through dynamic probing can be used for qualitative determination of a soil profile, along with direct investigations such as sampling according to prEN ISO 22475-1. Additionally, the test results can be used to make relative comparisons with other in situ tests, as well as to determine the strength and deformation properties of cohesionless soils through suitable correlations.

Furthermore, the results obtained through dynamic probing can be utilized to determine the depth to very dense ground layers, such as in determining the length of end bearing piles. They can also be helpful in identifying very loose, voided, back-filled, or infilled ground conditions.