Ground freezing
Design and implementation of ground freezing
Ground freezing for safe construction processes in challenging ground conditions
Design and implementation of ground freezing
Ground freezing for safe construction processes in challenging ground conditions
Ground freezing is a well-established method for construction projects in water-bearing and unstable soils or rock formations. DMT GROUP plans and oversees ground freezing operations for projects of various sizes and under a range of operating conditions worldwide. In doing so, we combine engineering expertise with modelling, precise design and continuous monitoring.
The method is used, amongst other things, in specialised civil engineering, shaft and tunnel construction, and in mining. Ground freezing can also contribute to temporary stabilisation and sealing in the event of sudden damage. The targeted freezing of pore water creates a load-bearing and largely impermeable frozen mass, which can provide a dry working area, even where space is limited.
Together with clients, we develop a freezing system that is optimised in terms of both technical performance and energy efficiency. Our range of services extends from concept development and three-dimensional modelling through to detailed design, site supervision and documentation. The aim is to create stable and safe working conditions and to control and limit the ingress of groundwater during the construction works.
Dr Lucy Schlicht
Natural Resources / Geomechanics
+49 201 172 1967
DMT GROUP has in-depth expertise in the design and technical planning of de-icing systems. Our range of services includes the sizing of de-icing measures, the planning of de-icing pipework and on-site support during technical implementation.
Continuous monitoring ensures transparency regarding the icing process and supports its safe implementation. Using DMT SAFEGUARD, we continuously document the development of the ice barrier throughout the entire project. For the technical implementation, we collaborate with experienced specialist contractors. In this way, we combine robust planning with transparent implementation and a coordinated construction process.
Our aim is to reliably monitor the planned sealing effect whilst the work is in progress and to ensure stable working conditions. Once the work is complete, the ground thaws again in a controlled manner. As no chemical sealants are used, ground freezing can, depending on the project requirements, represent a suitable alternative to other temporary waterproofing methods.
Under suitable geological and structural conditions, ground freezing is an established method for the temporary stabilisation and waterproofing of loose rock against rising groundwater. If requirements change at short notice during a construction project, we will work with you to assess whether a ground freezing measure can be implemented in a technically and economically viable manner.
Please get in touch with our geomechanics experts – we look forward to hearing from you.
Site investigation
Planning of ground freezing measures
3D modelling
Operation, maintenance and monitoring
In ground freezing, the pore water present in the ground is selectively frozen. This creates a load-bearing and largely impermeable frozen layer, which can facilitate construction work in challenging ground conditions.
This method is particularly suitable for construction projects in water-bearing or unstable soils and rock formations. Typical applications include specialised civil engineering, shaft construction and tunnelling, as well as mining.
DMT develops ground-freezing solutions based on geological and structural constraints. Its services include ground investigations, the design of the frost barrier, three-dimensional modelling, detailed design and supervision of the implementation.
Continuous monitoring provides transparency regarding the development of the frost barrier and supports its safe implementation. With DMT SAFEGUARD, the de-icing process can be continuously documented throughout the entire construction project.
Once the process is complete, the ground thaws again in a controlled manner. As no chemical sealants are used, ground freezing can, depending on the project requirements, be a suitable alternative to other temporary sealing methods. The energy requirements are taken into account at the planning stage.
In the event of damage or changes to project conditions, ground freezing may be considered as a means of temporary stabilisation and waterproofing. Whether this method is suitable depends on the geological, structural and time-related conditions of the project in question.