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The properties of each individual layer are precisely recorded in the catalogue. This includes information on colour, grain size, consistency, moisture content and other characteristic features. Equally important are the depth details that mark the beginning and end of the layer. This creates a precise picture of the vertical structure, which remains comparable regardless of the drilling method. The organised structure makes it possible to depict even complex soil conditions in a comprehensible way.

A complete strata catalogue not only provides a snapshot of the drilling point, but also creates the basis for technical decisions. Engineers use it to select suitable construction methods, determine foundation depths or assess risks. At the same time, environmental experts benefit as information about possible pollutant layers or groundwater behaviour becomes visible. In research, it allows conclusions to be drawn about geological developments and the history of a region.

The care taken in the preparation has a direct impact on the usability of the bore log. Only if the information is consistent, detailed and comprehensible can it be used reliably by experts. The strata catalogue is therefore much more than just documentation - it forms the foundation for all further steps that are based on reliable knowledge of the subsoil.

DIN 4022 and DIN 4023, which contain specifications for the description and presentation of geological strata, are particularly relevant for stratigraphic logs. They ensure that geological findings remain comparable regardless of person and project. Internationally, ISO 14688, provides uniform standards for classifying and naming soils. These regulations ensure that strata catalogues are technically reliable, comprehensible and can be used across regions. This ensures comparability across national borders.

The graphical representation is a vertical section through the borehole. Different soil types and rocks are identified by standardised colours, patterns or symbols. In addition, depth information is used to mark the beginning and end of a layer and establish the connection to the actual borehole. This creates a vivid image that concisely complements the text information and in many cases even makes it easier to understand.

In practice, the drilling profile offers numerous advantages. Engineers can use the sequence of layers to assess which construction methods are suitable and where special precautions are required. It also has an important function for environmental assessments, as the permeability of soil layers or the location of groundwater can be seen directly. Clients in turn receive a compact and easily comprehensible overview with the drilling profile.

In addition to its immediate practical use, the drilling profile also plays an important role in research. It provides data that can be used for geological reconstructions and comparative analyses. It thus contributes to scientific documentation and creates a solid basis for understanding long-term developments in the subsurface. Its value therefore lies equally in its technical and scientific application.

There are clear standards to ensure that drilling profiles are comprehensible and comparable everywhere. Particularly relevant are DIN 4023,, which sets out specifications for the presentation of drilling profiles, and DIN 4022,, which regulates the labelling of soil and rock materials. At international level, ISO 14688 supplements these standards by specifying standardised rules for naming and classifying soils. These standards ensure uniformity and guarantee that drilling profiles can be used across regions and disciplines.

The contents of a drilling log are wide-ranging. In addition to the equipment and methods used, the start and end of drilling and the depth reached are documented. The drilling progress, special technical features, flushing fluids or aids used and any faults that occur are also recorded. This comprehensive collection of information allows the working conditions and results to be reconstructed exactly.

In practice, the drilling log serves a variety of purposes. It provides an important basis for clients and engineers to make decisions about construction methods, safety measures and costs. At the same time, it serves as legal proof that the work has been carried out properly. Authorities can use the log to check compliance with regulations, while experts use it to back up their assessments.

In addition, the drilling log also provides valuable services in research. It not only documents the results, but also the circumstances under which they were obtained, which is crucial for the comparability and reproducibility of data. It therefore helps to make geological investigations permanently verifiable and scientifically usable. It unfolds its full value especially in combination with the stratigraphic log and drilling profile.

Standards are used to standardise the content and format of drilling logs. DIN 4021,, which regulates the documentation of boreholes and the structure of logs, should be emphasised. It is supplemented by DIN 4022,, which specifies a systematic description of soil and rock types. ISO 22475, which defines standards for geotechnical exploration, sampling and groundwater measurements, is of international importance. These standards ensure that drilling logs remain standardised, comparable and technically reliable.