Service areas

As a leading provider of deep, turnkey construction pits, we offer concepts customised to your construction project from a single source and thus always the technically and economically optimal solution for your project.

The choice of shoring type depends largely on the prevailing geological conditions such as the stratification of the subsoil or groundwater levels, the available local space and the planning conditions. If necessary, we supplement the construction pit walls with anchoring, support and bed sealing systems.

In addition to the execution of partial trades for the construction pit enclosure, we also offer the construction of construction pits as a complete solution. As a general contractor, we take on complex construction projects and the coordination of tasks that go beyond special civil engineering. This includes the complete handling of construction pits. Benefit from decades of expertise in special civil engineering and our problem-solving skills - especially for difficult construction tasks.

We offer the following methods for constructing construction pits:

• Construction pit walls
• Grouted anchors
• Sealing slabs

As the use of deep foundations or large-scale soil replacement in very soft or low load-bearing layers is usually very time-consuming and cost-intensive, more targeted subsoil improvement measures can be a much more economical alternative.

In this area, we offer a wide range of traditional and innovative techniques for stabilising the existing subsoil. Thanks to our wide range of technical possibilities, we can adapt to the individual conditions of your construction site.

The cost and cost-effectiveness of a stabilisation measure always depend heavily on the local and planning conditions as well as the technology used. These boundary conditions essentially influence the production grid of the stabilisation elements used. As a provider of subsoil improvements, we offer customised processes from a single source that are tailored to your construction project and therefore always offer the technically and economically optimal solution for your project.

We offer the following methods for subsoil improvement:

• Soil mixing methods
• Ground freezing method
• Compaction grouting
• Jet grouting (DSV)
• Geotextile-coated columns
• Vibro-pressure method (RDV)
• Vibratory tamping method (RSV)
• Stabilisation columns Stump-Franki S³ system (CSV)
• In-situ concrete vibration columns (ORS)
• In-situ concrete tamping columns (OSS)
• Stabilisation injections
• VVB columns (unreinforced concrete columns)

In the event that there is no horizontal, water-barrier soil layer in a watertight construction pit, a so-called trough construction pit, an essentially horizontal sealing slabs must be created for the construction pit closure.

We take into account the geological, local as well as planning conditions for each construction task and thus find the most economical and safest method for your order. If necessary, we secure the sealing slabs against buoyancy using micro-grouted piles.

In our function as a general contractor, we not only take on special civil engineering, but also the coordination of complex construction projects. This includes in particular the complete handling of construction pits.

We offer the following methods for constructing sealing slabs:

• Deep-lying DSV sealing slabs
• Soft gel injection slabs
• Medium-height DSV sealing slabs
• Underwater concrete slabs

In an era where resources are becoming increasingly scarce, the optimal use of available space is crucial for sustainable real estate projects. This not only pertains to the spatial development of the subsoil for underground parking and storage but also its use as an energy supplier and storage unit.

Near-surface geothermal energy, coupled with modern heat pumps, provides a cost-effective, low-maintenance, and virtually emission-free energy supply. It also leverages local resources like heat and cold and is consistently available, making it feasible at virtually any location. By drilling deep boreholes of up to 400 meters, the natural geothermal potential of your property is harnessed with high efficiency, actively aiding in the decarbonisation of energy supply.

We implement the following design variants:

• Drilling using hollow augers
• Direct fluid flushing drilling (water with flushing additive agents)
• Hammer drilling with air flushing

The foundations form the structural and static transition between the building and the ground. Its primary function is to absorb loads from the building and transfer them safely to the ground.

As experts with many years of experience, we are aware of the different framework conditions and problems associated with foundations. This is why, in addition to conventional foundation types, we also offer special solutions such as the Frankipile NG®.

When it comes to complex construction tasks with foundation problems, safety and cost-effectiveness take centre stage. Thanks to our wide range of technical possibilities, we can adapt to the individual conditions of your construction site.

We offer the following methods for foundations:

• bored piles
• Full displacement drilled piles
• Driven piles
• micro pile
• Jet grouting
• Subsoil improvement

In buildings, under power lines and under bridges. On-time and on-budget retrofitting foundations for existing buildings depend on a wide variety of factors. Changing ground conditions and load-bearing capacities, compliance with environmental protection requirements and much more must be taken into account.

In addition, it is often difficult to retrofit foundations to structures that are worth preserving due to the spatial conditions.

Thanks to the use of specialised equipment, retrofitting foundations is no problem, even at low construction heights, under power lines or bridges. Thanks to our experience and detailed preparation, planning and coordination of the various trades, we have been specialising in complex tasks in this area for many years.

We offer the following methods for retrofitting foundations:

• Bored piles under limited height
• Atlas pile under restricted height
• Tubular steel pile
• micro pile
• HLV pile / ductile driven piles
• Jet grouting

The rehabilitation of buildings requires a good feel for historical structures and years of experience. Whether rehabilitation of bridges, buildings or even historic castles - we offer you the right procedure in each case. Thanks to our special qualifications, such as our SIVV licence and jet driving licence, you are always on the safe side with us.

A particular challenge is "building in existing structures", as the available planning documents for existing structures do not always correspond to reality. This makes realisation more difficult and requires agile planning. Thanks to our wide range of technical capabilities, we can quickly adapt to the individual conditions on the construction site, ensuring that the project is handed over on time.

With our own bricklayers, concrete renovators and special civil engineers, we carry out masonry and concrete renovations including stabilisation work. As a certified specialist company for the protection and repair of concrete components, we are also on hand to provide you with expert support in the event of unexpected problems and ensure successful completion.

We offer the following rehabilitation methods:

• Jet grouting
• injections
• Masonry restoration
• Concrete restoration
• micro pile
• Jetcrete

Underpinning is used to secure a building against slipping or settling during earthworks. They are required, for example, if a deeper foundation is planned next to an existing building.

Our specialists always find a customised solution and secure your construction project safely and economically.

As a technology leader in special civil engineering, we provide you with all processes from a single source. We ensure our quality through individually coordinated process instructions and thus guarantee successful completion.

We offer the following methods for underpinning work:

• Jet grouting (DSV / HDI)
• Use of micro piles
• Conventional underpinning with underpinning walls according to DIN 4123
• Underpinning with fine cement injection

In addition to planning, our core metrological competences also include carrying out the necessary static and dynamic test loads. Our extensive measurement technology ensures quality assurance.

Our expertise and the dedicated commitment of our employees guarantee our internal and external partners the optimum execution of pile test loads in accordance with the recommendations of the pile working group (EA-Pfähle) or specially developed concepts.

Depending on the structure and the individual requirements of the construction project, we have the appropriate measurement technologies at our disposal. We offer complete solutions in all phases of your construction project.

Services in the field of measurement technology:

• Vibration measurements
• Glass fibre measurement technology
• Integrity measurements
• Test loads
• Sound measurements
• Dust measurements