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Sustainable solutions

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In line with our strategic orientation "Intelligent Growth with Green and Lean", we are pushing climate-neutral construction projects and intelligent technologies at PORR. Our focus is on active energy and emissions management as well as resource-conserving and circular construction. In special civil engineering in particular, we can make a major contribution to sustainability in construction through low-CO2 processes or environmentally-friendly injection agents. With our technologies, which we are constantly developing further, we contribute to mitigating the negative consequences of climate change and keep current environmental issues in mind in all our decisions. We work with you to develop sustainable solutions and thus take responsibility.

If you would like to find out more about PORR's sustainability strategy, please visit our sustainability page. 

Conserving resources begins in the planning phase

The CO2 footprint of construction pits and foundations is up to 95 per cent dependent on the materials used. We support you as early as the planning phase in selecting the optimum methods for using materials efficiently. As a full-service provider in special civil engineering, we select the method with the best CO2 footprint from all the methods suitable for your construction project.

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Sustainability in special civil engineering
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Sustainable applications

With our slender Displacement piles - Greenpile - such as the Frankipile NG® or the atlas pile, we save a considerable amount of concrete compared to alternative pile systems. The efficient use of materials conserves resources. In addition, the soil displacement means that no drilling material is produced. This means that no additional transport or external utilisation is required. Conclusion: You save costs, reduce emissions and relieve the burden on neighbouring construction sites. All of this also increases your project's eligibility for approval.

 

A particularly sustainable method that does not require the use of cement is the vibration tamping method. By using natural and locally available materials such as gravel and crushed stone, this subsoil improvement method is particularly environmentally friendly.

 

Recycled building elements pay off for you. Instead of extracting soil, the soil mixing method uses the existing soil. Using a leader-guided mixing paddle, we mix the soil with a comparatively small amount of cement suspension to create an earth concrete body. To realise shoring walls with low deformations, load-bearing elements are placed in the fresh earth concrete body.

 

Sealing slabs are used to seal the surface of excavation floors against vertically rising groundwater. The soft gel injection base is a particularly environmentally-friendly process that we manufacture economically, safely and with an excellent CO2 footprint. Our environmentally neutral bio-soft gel is one of three soft gels with general type approval from the German Institute for Building Technology (DIBt).

 

If you need a pile foundation anyway, the additional costs for near-surface geothermal energy are low. We will be happy to consult you on the planning of energy piles. This allows you to heat in winter and cool in summer.

 

To prevent pollutants from contaminated soils entering the groundwater, we can secure them using jet grouting with overlapping DSV columns. DSV sealing blocks bind the pollutants and thus protect the groundwater in the long term. The stabilised soil can later be extracted, fed into soil treatment plants or disposed of professionally.

We replace contaminated soil with uncontaminated soil using overlapped, cased large boreholes. The drill heads for the replacement boreholes have a diameter of up to 2 metres. The excavated material is then fed into soil treatment plants.

 

Other environmental friendly measures:

  • Use of CO2-reduced cements: e.g. DSV underpinning in Wiesbaden
  • Focus on short delivery routes for material orders
  • Focus on energy efficiency: Use of modern, low-emission equipment, partial use of electrical equipment e.g. for construction in existing buildings, switching off the engine during breaks, measuring, evaluating and optimizing consumption. PORR has a certified energy management system according to ISO 50001.

Case study

The cost savings and CO2 savings from foundation optimization can be enormous, as the following project example illustrates. For the foundation of a silo in Wilhelmshaven with a total load of about 680 MN, we were able to convince the client of a deep foundation on Frankipfähle NG®. We can also plan your excavation project economically and ecologically from the ground up or optimize it accordingly - for example, with the groundwater-compatible replacement of classic jet-grouted bases with soft gel injection bases with bio-soft gel; without the use of cement.

Comparison with the foundation of a silo

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