Skip to content

Consulting and planning

Safe . Economical . Environmentally friendly

Our in-house specialist engineers will work with you to develop optimised construction pit and foundation solutions tailored to the requirements of your project. This is how we guarantee that your individual building can be created economically and sustainably.

Planning competence.

Our services range from design planning to approval planning to implementation planning. If desired, our experts can also take over the entire planning process. We always choose the most suitable method for your project when it comes to excavation pits, deep foundations, subsoil improvement or underpinning. As a full-service provider, we can offer all technical procedures of foundation engineering neutrally and from a single source. We will find the best solution for you.


We minimise risks for your construction project through the consistent use of 3D planning and Building Information Modelling (BIM). This allows us to identify the many interfaces, e.g. with underground supply lines or existing neighbouring buildings, at an early stage and avoid collisions, especially in inner-city construction projects.

Reduktion von CO2-Emissionen.

Wherever it makes ecological sense, we show alternative foundation concepts, such as the redesign of large bore piles to displacement piles.


  • Significantly less concrete consumption
  • no need for disposal of drilled material
  • fewer truck transports
  • a massive reduction in CO2 emissions
  • In addition, the groundwater-compatible design of soft gel injection bases with bio-soft gel, without the use of cement - an environmentally friendly technology, with an improved CO2 balance.


Contact partner.

PORR Spezialtiefbau Planung GmbH Hittfelder Kirchweg 24-28
21220 Seevetal
To the route planner
+49 4105 869-0 +49 4105 869-140
Deep foundations Dr.-Ing. Jens Wasner Technical Manager Specialist area manager piles
Building foundations Denis Ivkic Deputy manager Head of the construction pits department


Consulting and planning in foundation engineering
(Only available in German)

Construction pits - Detailed and resilient planning for a smooth and timely construction process.

At PORR Spezialtiefbau Planung GmbH, we rely on the expertise and many years of experience of our employees. With the additional support of 3D planning and Building Information Modelling (BIM), we define an economical and safe solution for your construction project in advance. An important basis for a smooth construction process within the specified time frame.

Our services in detail.

Planning the construction pits as well as the necessary safety measures for the neighbouring buildings
Planning the dewatering measures
Preparation of logistics plans, taking detailed account of the characteristics of the large-scale equipment
Coordination of the construction processes with the approval authorities
Drawing up framework and detailed schedules
Preparation of the design, approval and execution planning

Deep foundations

Deep foundations - often referred to as pile foundations - are always used where the layers close to the surface do not adequately bear the loads of the structure and the building loads have to be transferred to deeper, more load-bearing soil layers. Here we plan for you with all common pile systems, for a foundation that is optimally tailored to the requirements of your project.


Overview of the common pile systems:

Subsoil improvements

In the case of very soft or less load-bearing layers, targeted subsoil improvement measures can be an economical alternative. In this area, we offer a wide range of traditional and innovative techniques for stabilising the existing subsoil. The cost and cost-effectiveness of a stabilisation measure always depend heavily on the local boundary conditions.


The following methods are frequently used:

  • Soil mixing methods
  • In-situ concrete columns
  • Gravel tamping columns
  • Vibro-compaction
  • Vibro replacement
  • Whether deep foundations or subsoil improvement - the decisive factor is a safe and economically optimised solution. Through the targeted combination of different systems, we increase cost-effectiveness and ensure a smooth process on the construction site.

Our services in detail.

  • Assessment and evaluation of subsoil and supporting structure with regard to foundation requirements
  • Determination of the most suitable foundation variant for your project
  • Optimisation of the foundation design and foundation geometry
  • Preparation of the design, approval and implementation planning

Securing and refurbishing - We create a secure and stable foundation

Securing neighbouring buildings with deeper construction pits.
If a deeper working level is planned next to or near an existing building, underpinning is often required to prevent the building from slipping into the construction pit. Underpinning may also be necessary if a building is to be subsequently deepened to prevent cracking due to soil settlement.

The foundation loads of the existing building with a shallow foundation can be transferred to a deeper foundation level using so-called underpinning bodies. Underpinning can also help to increase the external load-bearing capacity of existing foundations as well as to repair damage due to increased impacts, e.g. as a result of a change of use of the building.

Retrofitting foundations for existing buildings and increasing the load-bearing capacity.
Is there major subsidence in an existing building? Or do larger loads have to be transferred to the subsoil as a result of a planned conversion or a subsequent addition to the building?
Then retrofitting foundations of the existing building to a deeper foundation level is often necessary to ensure that the building remains stable. Through the targeted use of micro piles or the injection of ultra-fine cement, for example, subsequent foundation work can also be carried out in the building and often even during ongoing operations.

Our services in detail.

  • Planning of stabilisation measures for existing structures
  • Development of renovation concepts with retrofitting foundations and underpinning
  • Preparation of design, approval and implementation planning


Ensuring quality requirements is a top priority at PORR. This is also evidenced by our certificates and approvals. In order to always be up to date, our certificates and approvals are reviewed and updated on a regular basis through external audits and independent certification companies.

In addition, independent companies, such as Deutsche Bahn AG, confirm our skills and actions through prequalifications and special recognition.

All certificates, approvals and memberships can be found here: