Soil mixing techniques
Soil mixing techniques serve to create unreinforced structural elements (single elements or bodies of soil made of single elements) through grouting of the soil with a binder suspension on site. With the help of suitable tools, a defined volume of soil is mixed with a predetermined volume of binder suspension in a wet mixing process to form a homogeneous, self-hardening mixture.
Regulatory framework
There are no conclusive technical rules for the design and execution of the structural elements by means of soil mixing techniques. DIBt grants general construction technique permits (aBG) for corresponding applications. The executing company must submit a declaration of conformity stating that the executed elements comply with the provisions of the relevant construction technique permit.
The temporary use of such structural elements (generally < 2 years) does not require a regulatory verification of fitness for use or application. The structural elements can be designed on the basis of DIN 4093 'Design of strengthened soil – Set up by means of jet grouting, deep mixing or grouting'.
The use of these techniques for ground improvement is permitted from a regulatory point of view and does not require a construction technique permit.
National procedure
To prepare an abZ/aBG for your construction product, we need an application from you. We recommend that you contact us prior to doing so. Feel free to send us your enquiry informally via email to dibt(at)dibt(.)de or to the competent technical contact listed in the top right.
For a first assessment, please send us the following information:
- Description of the construction product and its intended field of use
- e.g. material, configuration, number of sizes, variants, dimensions
- e.g. use in walls, ceilings, interior construction, building services
- Description of the construction technique and its field of application
- e.g. design of walls, ceilings, elements, etc., and interaction of components
- e.g. application in foundation engineering, reinforced concrete construction, building insulation; as load-bearing or non-load-bearing component; under static and quasi-static loading; fire exposure; other environmental exposures
- Information regarding impact on regulatory concerns
- in particular structural integrity, fire protection, health and environment protection, sound insulation as well as thermal performance
- Explanation of need for an abZ/aBG
- Do you significantly deviate from the Technical Building Rules?
- Or do neither Technical Building Rules nor generally recognised technical rules exist?
- Contact details
- preferably email address and/or telephone number, as well as name, organisation/company, and postal address
We will then contact you to clarify the next steps.
If you already hold a DIBt approval and/or construction technique permit and wish to apply for an amendment, supplement, or renewal, please use the form provided below.
- pdf-Datei Application for amendment / supplementation / renewal of a national technical approval and/or construction technique permit (4 pages ) Last updated: 10 April 2024; Application form
| Subject concerned | Applicant | Decision no. |
Validity
from / to |
|---|---|---|---|
| BAUER Mixed-In-Place (MIP) | BAUER Spezialtiefbau GmbH BAUER-Straße 1 86529 Schrobenhausen | Z-34.26-200 |
Z:
31.05.2021 G: 28.03.2026 |
| Einphasenschlitzwand "BAUER EDWs" | BAUER Spezialtiefbau GmbH BAUER-Straße 1 86529 Schrobenhausen | Z-34.26-237 |
Z:
18.05.2022 G: 18.05.2027 |
| "Deep-Soil-Mixing" | MENARD GmbH Hittfelder Kirchweg 2 21220 Seevetal | Z-34.26-240 |
Z:
20.12.2021 G: 07.08.2026 |