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Sustainability

Environmental protection in specialist civil engineering

As a technology leader in specialist civil engineering, we are your competent partner for sustainable building. Our common goal: To minimise the consumption of energy and resources and to reduce CO emissions.

We are contributing to mitigating the negative consequences of climate change with our specialist civil engineering technologies, which we are continuously developing. We keep current environmental issues in mind in all our decisions. Whether this is responding to the increasing scarcity of raw materials, or switching to low-CO2 processes or environmentally friendly injection agents: We establish sustainable solutions, thus taking responsibility.

Our strategy

Energy efficiency: Reducing energy consumption and emissions

The objective of the “European Green Deal” is for the European Union to be climate neutral by 2050. Future-oriented building standards, alternative energies and sustainable equipment and fleet management are needed in the construction industry.

We also focus on the implementation of energy efficiency guidelines and regular energy audits. We have planned the comprehensive introduction of the energy management system according to ISO 50001 in 2022.

Research and development

As part of our research and development efforts, we are adopting social requirements for special civil engineering and are committed to the development of fully biological building materials in specialist civil engineering.

Proven innovation: fully biological building material

As early as 2019, the biological soft gel developed by Stump-Franki in a research project was approved for use in Germany. A general type approval has been issued by the German Institute for Building Technology (DIBt). The main application of the biological soft gel is to manufacture horizontal and vertical seals for construction troughs. The fully organic soft gel, which replaces building materials like cement or chemical components, is the first fully biological building material worldwide that is available for sealing applications. One major advantage of the fully biological soft gel is that it can be injected or pumped directly into the ground. It does not cause any negative changes to the ground water, such as increasing pH values or introducing salts or similar.

Our environmentally friendly processes

Saving resources begins in the planning phase

The CO2 footprint of construction pits and foundations is up to 95 percent dependent on the materials used. We help you select the best processes for the effective and efficient use of materials as early as the planning phase. As a full-service provider in specialist civil engineering, we select the method with the best CO2 balance from all those suitable for your building project.

Specialist civil engineering processes that are particularly environmentally friendly: 

Pile foundations: Reducing emissions

Our slim Greenpile displacement piles, such as Frankipfahl NG® or Atlaspfahl, require substantially less concrete than alternative pile systems. The displacement method also means that no drill cuttings are created. Additional transport and third-party recycling are therefore no longer necessary. As a result, you lower emissions, save costs, reduce traffic and minimise the impact on people living near the construction site. This also increases the likelihood of your project being approved.

Subsoil improvement: The use of natural materials

Vibro replacement is a particularly sustainable process that does not require the use of cement. The use of natural materials like gravel and crushed stone, which are already present on site, makes this subsoil improvement particularly environmentally friendly.

Cut-off walls: Working with the in-situ soil

Recycled building elements are cost-effective for you. The in-situ soil is used in the soil mixing method, which saves soil transportation. Using a frame-led mixing paddle, we mix the soil with comparatively little cement slurry to create a grouted soil body. Load-bearing elements are set into the fresh grouted soil body to realise lining walls with low deformations.

Cut-offs: Environmentally neutral sealing

Cut-offs are used for the surface sealing of construction pit bases against vertically rising groundwater. The soft gel injection floor slab is a particularly environmentally friendly process that we produce economically, safely in terms of execution and with an excellent CO2 footprint. Our environmentally neutral biological soft gel is one of three soft gels with general type approval from the German Institute for Building Technology (DIBt).

Energy piles: Climate-friendly geothermal energy

If you need a pile foundation anyway, then the additional costs for near-surface geothermal energy are low. We are happy to advise you on the planning of energy piles. They can be used to heat the building in the winter and cool it in the summer.

Soil decontamination: Binding contaminants:

To prevent contaminants from contaminated soils from entering the groundwater, we can secure them using the jet-grouting method with secant jet-grouted columns. The contaminants are bound with jet-grouted sealing blocks, providing sustainable protection for the groundwater. Later, the stabilised soil can be transported, sent to soil processing plants or properly disposed of.

Large hole boring: Replacing contaminated soil

We replace contaminated soil with uncontaminated soil by drilling large, cased, secant boreholes. The drill heads for the replacement boreholes have a diameter of up to 2m. The excavated material is then sent to soil treatment plants.

Support with certification

We calculate the CO2  footprint of the methods we have selected for you using special software such as the EFFC Carbon Calculator from the European Federation of Foundation Engineering Companies (EFFC). In this way, we support you in applying for your sustainability certificates, such as DGNB.

Case study

We find the most environmentally friendly process for you

With our wide range of technical capabilities, expertise and experience in specialist civil engineering, we can show you where savings can be made. We work with you to find a sustainable solution for your project.

Wherever it makes sense for you, we will demonstrate alternative foundation concepts, such as re-planning to replace large bore piles with displacement piles.

Your benefits:

  • Substantially reduced concrete consumption
  • No disposal of borehole cuttings
  • A substantial reduction in HGV transportation
     

You reduce CO2 emissions and simultaneously save manufacturing time and costs.

Compelling CO2 balance

The above optimisation example shows how the choice of the Greenpile pile system has a beneficial influence on the CO2 balance. Short, narrow piles, smaller foundations and elimination of the need to dispose of drilling material lead to significantly lower material consumption.

Brochure
Nachhaltigkeit im Spezialtiefbau (only available in German)
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Project
Groundwater protection Environmentally friendly pile foundation and cut-off in Bad Cannstatt
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Project
6,000m³ of concrete saved Foundation work for the combined cycle gas turbine power station in Herne
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Project
Safety Champion Soil decontamination: The safe binding of contaminants
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