# Geotechnical Investigation EN ISO 22475

This object type supports standardized documentation of **geological and geotechnical investigations** in accordance with **EN ISO 22475** and related standards. It is designed for recording boreholes, groundwater monitoring points, and wells, including associated field and laboratory data.

### Overview

The object type **“Geotechnical Investigation EN ISO 22475 (2018)”** is a further development of the earlier **2007 version**. It enables comprehensive acquisition, evaluation, and graphical representation of geotechnical data using standardized input forms, dictionaries, layouts, and database structures.

For current projects, the **2018 object type \[ENISO002]** is recommended and is provided to all GeoDin users via the GeoDin server.\ <br>

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### Standards and Normative References

The object type is based on the following standards:

* **DIN / ÖNORM EN ISO 22475 (2007/2006)**
* **DIN / ÖNORM / SN EN ISO 14688‑1 / 14688‑2**
* **DIN / ÖNORM / SN EN ISO 14689 (2020)**
* **DIN 4943 (2013)**

These standards define the structure, terminology, symbols, and layouts used for soil and rock description, borehole logging, and well documentation.

### Supported Data and Checklist

The object type includes the following main data categories:

#### General Data

* Project and location data
* Map preview
* Extended general data according to **DIN 4943**

#### Layer Data

* Stratigraphy
* Discontinuities
* Degree of decomposition
* Consistency
* Degree of weathering
* Rock strength
* Rock quality
* Cored section boundaries

#### Sample Data

* Field and laboratory samples
* Documentation of test results

#### Well and Groundwater Data

* Well design
* Groundwater monitoring points
* Filter and screen information
* Backfill and casing details

#### Data Sequences

* In-situ tests such as:
  * CPT
  * SPT
* Other measurement sequences

#### Additional Data

* Official notifications
* Bilingual geological standard (German / English)
* Customizable dictionaries and input forms

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### Key Features

#### Detailed Soil and Rock Description

Soil and rock characteristics can be recorded in detail using dedicated input forms, including:

* Discontinuities
* Degree of decomposition
* Consistency
* Degree of weathering
* Rock strength
* Rock quality
* Cored section boundaries

These forms are available in **German/Austrian and English**.

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#### Advanced Layer Data Handling

Layer data include selection dialogs that provide access to additional input forms for detailed geological descriptions, ensuring consistent and standardized data entry.

#### Standard-Compliant Layouts

Predesigned layouts allow output in accordance with:

* **DIN 4943**
* **EN ISO 22475**
* **EN ISO 14688**
* **EN ISO 14689**

Geological fill patterns comply with:

* **DIN 4023**
* **ÖNORM EN ISO 14688/14689**
* **BS 5930‑1990**

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#### Visualization Outputs

Available layouts include:

* Trial pit visualization (ÖNORM)
* Borehole logs according to EN ISO 14688/14689
* Drilling profiles and well design according to DIN 4943

### Technical Notes and Compatibility

* The object type uses the **new descriptor (E2)** due to technical adjustments.
* Full functionality is available **from GeoDin version 9 onwards**.
* The object type is **not downward compatible** with earlier GeoDin versions.

### Application Areas

The object type is commonly used in:

* Geology
* Environmental geology
* Geotechnics
* Civil engineering
* Documentation and graphical representation of:
  * Boreholes
  * Wells
  * Groundwater monitoring points

Field and laboratory investigation results used to assess soil suitability for construction purposes can be documented using dedicated data types.

### Database Tables (Selection)

The following database tables are used by the object type:

* **GEODIN\_LOC\_E2GENER** – General data
* **GEODIN\_LOC\_E2LAYER** – Layer data
* **GEODIN\_LOC\_E2STRATI** – Stratigraphy
* **GEODIN\_LOC\_E2TF** – Discontinuities
* **GEODIN\_LOC\_E2TFNAB** – Discontinuities (standard distances)
* **GEODIN\_LOC\_E2RMZ** – Degree of decomposition
* **GEODIN\_LOC\_E2RMLK** – Consistency
* **GEODIN\_LOC\_E2RMV** – Degree of weathering
* **GEODIN\_LOC\_E2RMGF** – Rock strength
* **GEODIN\_LOC\_E2RMFQ** – Rock quality
* **GEODIN\_LOC\_E2RMKM** – Cored section boundaries
* **GEODIN\_LOC\_E2SAMPLE** – Sample data
* **GEODIN\_LOC\_E2GWATER** – Groundwater data
* **GEODIN\_LOC\_E2BESCH** – Official notifications
* **GEODIN\_LOC\_E2WDGEN** – Well design: general data
* **GEODIN\_LOC\_E2WDHOLE** – Well design: borehole
* **GEODIN\_LOC\_E2WDCAS** – Well design: casing/screens
* **GEODIN\_LOC\_E2WDFILD** – Filter/screen information
* **GEODIN\_LOC\_E2WDBCKF** – Well design: backfill
* **GEODIN\_LOC\_E2WDFLUI** – Well design: flushing
* **GEODIN\_LOC\_E2WDSPCL** – Well design: special features
* **GEODIN\_LOC\_E2DSREG** – Register of data sequences