Expert consultancy in subsurface, vibrations and earthquakes.


The world is changing quickly by new technologies. Technologies meant to make our lives easier, to increase safety and to gather all kinds of information. To make the right decision based on facts you need the right knowledge and understanding. Technical specialists with profound understanding of their field are needed. Our mission is to contribute to society by giving solid advice through expert consultancy.


Our expertise is in subsurface, vibrations and earthquakes. A quick understanding of problems based on much or very little data is our strength. We translate data into information and make models to come up with predictions. We subsequently check the predictions on the basis of monitoring data. This closes the loop. We are used to working efficiently and result-driven.

Circle figure: Data - Analysis - Information - Model - Prediction - Measuring - Data (etc) ---Vibrations, Subsurface, Eatrhquakes



The subsurface is the most uncertain factor in projects. For the design of foundations, vibration predictions or the determination of earthquake load, the behaviour of the subsurface plays an important role.

The subsurface is not transparent. We are therefore dependent on (CPT) soundings, boreholes or geophysics to map the ground.

When interpreting and connecting all this information, it is necessary to understand geology, geotechnics as well as foundation techniques.

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Vibration is the movement of a structure or medium. The way a structure or medium vibrates is sometimes difficult to predict. Damage or hindrance can be unwanted consequences of vibration.

By performing vibration monitoring we can get understanding of the level of vibration and its consequences. This needs in-depth knowledge of monitoring, data processing and assessment criteria.

In case of assessing future situations, we need to make use of prediction models. This requires knowledge of the different modelling techniques.
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Anyone who has experienced an earthquake can confirm it has a huge impact. The impact can be in the form of damage to buildings and structures, but also in the form of social unrest.

Therefore seismic design is important for buildings and structures in earthquake sensitive areas. Determining earthquake loads and especially their uncertainties is not that simple.

Knowledge of the deep and shallow subsurface is required. Also knowledge is required of seismic processes, wave propagation in the subsurface and soil-structure interaction. Statistics is needed to deal with the uncertainties.

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Geothermal energy

The largest part of the energy demand in the Netherlands consists of heat. Geothermal heat can meet this demand as a sustainable energy source. The subsurface can also be used for cooling and the temporary storage of heat.

The shallow subsurface has a constant temperature of approximately 15 degrees. With heat pumps, the constant temperature of the subsurface can be used to heat and cool houses and buildings. This is called aquifer thermal energy storage (ATES). These applications usually do not go any deeper than 150 m.

The deeper subsurface (more than 1 kilometer) is used in the Netherlands to extract hot water in order to heat greenhouses. These are called geothermal systems. There are several plans to use geothermal systems for district heating as well. There are also plans to use ultra-deep geothermal systems (more than 4 kilometers deep) for industrial heating and residual heat for district heating.

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National Congress on Noise, Vibrations and Air Quality 5th and 6th of November 2019

17 Sep 19

National Congress on Noise, Vibrations and Air Quality 5th and 6th of November 2019

Together with Railway Operator ProRail, Cohere Consultants will give a presentation on the recent guideline new building constructions and railway vibrations. The presentation will be given on the 6th of November during the Dutch National Congress on Noise, Vibrations and Air Quality, see GTL congres. Next to that Eliam will chair the session on vibrations on behalf of the Dutch Vibration Association.

Symposium Energy Geotechnics: 3rd October 2019

21 Aug 19

Symposium Energy Geotechnics: 3rd October 2019

Cohere Consultants is part of the organisation committee of the symposium “Energy Geotechnics: Mechanics of the energy transition”. The symposium takes place on the 3rd of October 2019 at the Science Centre of Delft University of Technology.

New building constructions and railway vibrations

14 Aug 19

New building constructions and railway vibrations

Dutch State Secretary Van Veldhoven has informed the house of representatives (tweede kamer) on the recent written guideline New building constructions and railway vibrations (Nieuwbouw en Spoortrillingen). Cohere Consultants is co author of the guideline, see the download link hier.

How the mining world can learn from Dutch dikes

20 Feb 19

How the mining world can learn from Dutch dikes

Contribution of Siefko Slob in the Dutch national paper Trouw on the failure of the Brumadinho tailing dam.

Failure of the Brumadinho dam

13 Feb 19

Failure of the Brumadinho dam

LinkedIN article of Siefko Slob on the failure of the Brumadinho tailing dam

Impact of railway vibrations

15 Oct 18

Impact of railway vibrations


Postal Address
Cohere Consultants v.o.f.
Postbus 1755
3800 BT Amersfoort
The Netherlands
Office Address
Schipbreuk, Kleine Koppel 14
3812 PH Amersfoort