STUBORE® provides clarity when comparing different drilling methods. This is because not every method yields the same sample quality. A sample’s quality grade determines which soil parameters can be reliably derived from it: from simple stratigraphic identification to the determination of strength, unit weight, and permeability.

The energy input during drilling—whether rotary, percussive, or combined—directly influences the structure of the core. Core loss, compaction, material displacement, or core loss are not random occurrences but rather consequences of the method used. The decisive factor is whether a system is structurally designed to minimize these disruptive influences.

STUBORE® operates with continuous casing and continuous core recovery in a double-core tube. The core does not rotate with the drill string but remains mechanically protected throughout the entire drilling process. The result is clearly identifiable layer boundaries, high sample yield, and structural and layer accuracy that allows for targeted conclusions about the actual subsurface.

The comparison shows where conventional methods reach their limits and how STUBORE® provides the basis for well-founded planning and permitting decisions.