Soil detection / Explosives research

Everywhere in the world there are still explosives (eg unexploded aircraft bombs (duds), grenades, mines and ammunition) in the subsurface. These explosives can pose a great risk when carrying out earthworks. By means of a detection investigation the presence of these explosives can be mapped.

GSNED / BMNED uses magnetometer CPT's during the detection investigation / explosives investigation. The measuring principle of the magnetometer cone is based on the detection of magnetic irregularities due to the presence of ferrous objects. By measuring local deviations of the total magnetic field, the type, size, shape and position of the object can be accurately determined.

Magnetometer probes are non-destructive (no soil needs to be removed or disposed of and also groundwater related issues are not relevant). The magnetometer cone measures the changes in the magnetic field in both the X, Y and Z directions and can detect magnetic anomalies up to 1 to 2 m distance so that with each probing a vertical cylinder with a diameter of 2 to 4 meters can be examined.

The clearing takes place by means of an ISO9001, VCA ** and the Work Field Specific Certification Schema Detection Conventional Explosives (WSCS-OCE). The magnetometer CPT's are carried out by GSNED in-house.

During the performance of the magnetometer probes, the standard probing parameters such as point resistance, adhesive and slope can also be taken into account. If desired, the water pressure can also be registered. This simultaneous registration of geotechnical parameters and the magnetic field can be used to indicate in which soil layers the possible metal objects are located. In addition, the information obtained can be used for carrying out various geotechnical studies.

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