Ootechnik for an excellent & solid Base

According to DIN E 1997-1, a subsoil investigation must be carried out for every building as the basis for structural planning and the geotechnical report must be prepared according to DIN 4020. The soil-mechanical properties of the subsoil determined in this way form the basis for e.g. the verification of foundation stability, the forecast of settlements, the planning of building waterproofing, the possibility of rainwater infiltration, the durability of traffic routes, or the requirement of excavation securing. Our geotechnical engineering department examines the subsoil according to engineering geological aspects and the requirements of DIN EN 1997-2 and advises, plans and optimises the design of the geotechnical trades according to constructional, environmental and economic aspects.
  • Creation of exploration and investigation concepts
  • Subsoil investigation and evaluation
  • Field exploration
  • by means of small pile driving, light and heavy pile driving, pressure soundings, in-situ tests, etc.
  • Soil mechanics field and laboratory tests
  • Infiltration tests (open-end tests, double-ring infiltrometer, etc.)
  • Planning and evaluation of pumping tests, incl. technical and metrological support
  • Compaction and bearing capacity tests in earthworks and road construction (static and dynamic plate load tests)
  • Soil expertise / subsoil expertise / geotechnical reports and statements Foundation consulting

Contact Person

Departmental Coordinator

Site investigation Roberto Quaas
For every new building, a subsoil investigation must be carried out as the basis for structural planning and a geotechnical report prepared in accordance with DIN 4020. Often, the site geology results in constraints for the foundation planning, which - in inner-city situations - have to be dovetailed and optimised with the concerns of deconstruction and environmental concerns. If the subsoil investigation and foundation/pit planning are carried out in the course of deconstruction and/or remediation planning, duplication of effort can be avoided and critical paths of the construction process and construction time can be clarified at an early stage. Our geotechnical engineering department examines the subsoil according to engineering geological aspects and advises and optimises the foundation and the necessary auxiliary structures of special civil engineering, such as shoring walls, underpinning, sealing and water retention.
Our range of services:
  • Design and planning of earthworks and special civil engineering measures
  • Excavation and foundation planning
  • Earth static calculations according to DIN EN 1997-1
  • Settlement predictions, optimisation of subgrade reaction coefficients
  • Applications for permits under water law
  • Tendering of earthworks and special civil engineering measures
  • Cost estimate
  • Expert opinions on neighbourhood permission agreements
The staff of the Landfill Department and the colleagues from the other departments involved plan your development of a contaminated site or landfill. Depending on the settlement potential, the buildings are founded with foundation pads or deep foundations. With the help of our colleagues, we can provide all the services required for professional planning and successful application, from stability and hydraulic and environmental issues to greening planning. We would be happy to advise you. We plan your development of a contaminated site or landfill.
Our services for the fulfilment of your project:
  • professional planning
  • Application and official communication
  • We can also provide you with professional advice on the implementation of your project - from stability and hydraulic and environmental issues to greening planning. We would be happy to advise you.
Services:
  • Planning and construction supervision of built-over contaminated sites and landfills
  • In-house and external monitoring of landfill construction work
Landfill planning and construction supervision:
  • Surface waterproofing planning
  • Planning services for the overbuilding of landfills and old deposits
  • Proof of stability
  • Quality management
  • Assessment of the environmental impact
  • Testing of geohydraulic site properties
  • Landfill gas measurements (pre- and aftercare)
In-house and third-party monitoring:
  • Self-testing of the mineral waterproofing components
  • External testing* of the mineral waterproofing components
  • Tests of the plastic element with cooperation partners

Contact Person

Departmental Coordinator

Landfill Gerald Kollmann
Not only hard coal was mined in Germany for several hundred years. Other raw materials of stone and earth, such as ore and salt, are and were also mined in Germany for a long time. At many mining sites today we have arrived at the time of post-mining. In today's densely populated mining regions, legacies from earlier mining times pose serious civil risks and subsoil risks. These include, in particular, inadequately secured former mining zones, openings such as shafts or gallery mouths that have not been preserved according to the current state of the art, and abandoned opencast mines. Due to increasingly dense settlement and post-daily land use, additional issues arise, such as the stability of mine workings, open pits or shafts as well as the regulation of mine water or outgassing situations, for which sustainable, economic and ecological technical solutions must be found. These must not only be taken into account in the planning and development of new construction projects, but can also pose a considerable risk potential for existing structures, open spaces and traffic routes. Not only the direct effects of mining activities mentioned above, but also the peripheral phenomena such as dumps, waste rock piles, sludge ponds, clarification and sedimentation basins are now part of the mining legacy that must be considered in a sustainable subsequent use of the land. We are accredited by the mining authority of North Rhine-Westphalia as publicly appointed and sworn experts for abandoned mines (Dr.-Ing. Scherbeck, Dipl-Geol. Stempelmann). We offer expert support, planning services and advice on the following typical topics:
Near day mining
  • Mine image inspection and subsequent mining geotechnical site analyses of the hazard situation.
  • Exploration in the area of influence of near-surface mining (deposits and mining cavities) including the conception of the exploration, tendering or implementation of the exploration work, construction supervision, expert monitoring and documentation of measures.
  • Remediation planning including tendering of the commercial securing services, technical supervision and documentation.
Old shafts and gallery mouth holes (day openings)
  • Assessment of the stability of shafts and gallery mouths as well as conceptual design and planning of structural measures for securing and safekeeping.
  • Tendering of the securing and custodial works.
  • Expert monitoring and construction supervision of mining, civil engineering or drilling rehabilitation measures, documentation of measures.
Opencast mines and residual mining holes
  • Engineering geological survey, evaluation and planning for securing rock and loose rock slopes.
  • Preparation of geotechnical and mining concepts for the backfilling of residual opencast mining holes including engineering geological and rock mechanical calculations.
  • Advice on the preparation of final operating plans.
  • Tender for the safeguarding work.
  • Expert monitoring and construction supervision of remediation and protection measures, documentation of measures.
Mining damage
  • Recording of mining-related damage to buildings, land and other structures.
  • Carrying out the preservation of evidence.
  • Mining geotechnical site analyses.
Mine gas
  • Expert evaluation of the existing outgassing situation
  • Planning of outgassing protection

Contact Person

Departmental Coordinator

Old mining Dr Till Hellenkamp