DB Engineering & Consulting

A solid footing for rail

Complex infrastructure projects need reliable foundations in geotechnical engineering in order to be carried out reliably and according to plan since the subsoil is the basis of every construction project.

We've been getting to the bottom of things for over 55 years. Our geotechnical engineering experts offer the following services:

Having an evaluation of the subsoil conditions tailored to the particular project is an important precondition for stability and deformation. This is the only way to ensure that construction and the final project are safe.

Our range of services:

Earthworks and ground engineering

  • Geotechnical engineering and foundation consulting
  • Developing and carrying out property-specific exploration programs
  • Soil analysis and specification of lab tests
  • Numerical analysis:
    • Stability
    • Deformation
    • Dynamic stability
  • Preparation of substructure expert opinions for shallow and pile foundations, such as engineering structures, building construction, noise barriers, overhead line supports, signals, tracks and earthworks
  • Permanent way refurbishment, base course and drainage restoration, including appraisals for rail-mounted or conventional reconstruction
  • Deformation monitoring using settlement gauges, inclinometers and rail measuring points
  • Timing and control of embankment construction on soft and highly compressible soils, e.g. peat, using property-specific pore water pressure measurements
  • Measurement of groundwater-related subsidence

Laboratory and field testing

  • Small-scale percussion drilling, light and heavy dynamic probing
  • Vane sheer testing
  • Test pitting
  • Pump tests
  • Compaction testing
  • Load-bearing capacity measurements
  • Soil mechanical and some chemical laboratory testing
  • Core drilling in concrete and masonry

Control testing, in close collaboration with construction supervision, is an important pillar of quality control in construction related to earthworks and ground engineering.

Our range of services:

Control testing and geotechnical construction supervision

  • Advising of construction supervision team and project owner before and during construction
  • Advising regarding and influence on quality assurance plans between the contractor's own monitoring team and the construction supervision team
  • Control testing in the field, such as Evd and Ev2 load-bearing capacity measurements and compaction testing (Proctor compaction testing)
  • Sampling and testing of construction material
  • Inspection of formulas for qualified soil improvement
  • Statements on geotechnical problems on site
  • Acceptance of foundation beds for shallow and pile foundations

Laboratory and field testing

  • Small-scale percussion drilling, light and heavy dynamic probing
  • Test pitting
  • Pump tests
  • Compaction testing
  • Load-bearing capacity measurements
  • Soil mechanical and some chemical laboratory testing

A professional assessment of the existing structure of bridges and noise barriers or individual components must be conducted before professional renovations and reconstruction are carried out. It also saves design and construction costs.

Making the invisible visible – our experts use non-destructive radar methods to explore the details of traffic infrastructure with accuracy down to the meter.

What do we detect?

  • Properties and/or damaged areas
  • Material features such as courses and boundaries between courses (hydraulically bound courses, blanket, ballast, aggregate zones)
  • Homogeneous sections (remediation planning)
  • Voids, leaks, drainage, crossing lines, animal dwellings
  • Hard core, wet areas

Our range of services:

  • Detection of subsoil features with accuracy down to the meter in collaboration with our in-house surveying engineers
  • Separate analysis of all three profiles (rail side, field side and centerline of track)
  • Creation of database tables using results
  • Semi-automatic scanning of all visible layer boundaries
  • Creation of a geotechnical investigation program based on radar results
  • Incorporation of data into existing plans (e. g. AutoCad)
  • Calibration of data with direct geotechnical investigation in collaboration with our geotechnical engineering department
  • Creation of 2D representations based on DIN 4023