Geotechnical engineering is the collective name for ground mechanics and foundation technology and, according to the Van Dale dictionary, "the applied science that deals with the study of the behaviour of ground and rock for the design and realization of earthworks and art works."

Within the field of geotechnical engineering, CRUX investigates the properties of the ground, the behaviour of the ground and which structures are suitable for placing on or in the ground. In the design of (ground) structures, the subsidence and stability of the ground is investigated, and for the determination of the bearing capacity, much attention is paid to the type and dimensions of the foundation. The properties of the ground are determined in advance through field and laboratory research.

These geotechnical recommendations are used by CRUX for the construction of bridges, tunnels, locks, aqueducts, viaducts, high-rise buildings, utility structures, local, provincial and highway roads, dikes, windmills, off-shore structures, quay walls, et cetera.

Soil investigations

No two clays are the same. Without a solid understanding of the ground structure, no high-quality design is possible. Each project starts with identifying, characterizing and schematizing the substrate. A combination of geological and technical knowledge makes it possible to provide a good estimate of the risks of the substrate, domestically and abroad. CRUX has ample engineering geological expertise. Efficiently setting up, managing and interpreting soil investigations is therefore part of our expertise at CRUX. CRUX conducts soil investigation in collaboration with specialized and experienced partner companies.

(Reinforced) Ground structures

The ground deforms. This happens in particular during construction preparation or construction of a dike or road, when ground is added or removed. In the typically weak Dutch soils, the subsidence and stability of the ground structure are determining factors for the design. By using the most up-to-date calculation and execution methods, CRUX recommends the most economical and optimal design for a project.

All types of foundations

No construction without a good foundation. CRUX has extensive experience with both shallow foundations and pile foundations. In determining the right type of pile foundation, not only is the bearing capacity considered, but the type of pile foundation is also attuned to the local ground conditions.
Foundation consulting is provided by us for, among other things: bridges, viaducts, tunnels, high-rise buildings, non-residential and residential construction.
The design of a foundation substitution by means of grouting and foundation repair is also part of the specific field of expertise of CRUX (see the field of 'ground improvement').

Construction pits

Space is becoming increasingly scarce. That is why, especially in urban areas, more and more functions are being brought underground (storage, infrastructure, parking garages, et cetera). This requires construction pits to be near, next to or even under existing buildings and/or infrastructure. CRUX is able to handle the complete design of such construction pits. Our added value lies in our expertise and experience in the area of settlement risk assessment and damage prevention.

Drilling tunnels and trenchless techniques

The drilling and pressing of tunnels is increasingly being used in the Netherlands. This technique has been on the rise since the end of the last century. CRUX consultants have been involved since the introduction of these new techniques in the execution of projects and in the development of expertise in the area of underground construction.

State-of-the-art dike testing

CRUX is one of the first consultancy firms in the Netherlands to use state-of-the-art CSSM and SHANSEP (POV-M) for the study and design of dikes. In addition, CRUX offers comprehensive support for the design process, the execution of the environmental studies and the inventory of the risk of damage and for limiting this as well as possible. More information on this subject can be found in our 'State-of-the-art dikes' special.

Low-subsidence or subsidence-free systems

More information on this subject can be found in our 'Piled embankments' special.

Dynamics and earthquakes

With the recognition of the earthquake problem in the north of Groningen and the subsequent technical question concerning structural reinforcement, CRUX has developed in recent years into one of the experts in the field of induced earthquakes and the geotechnical risks involved. More information on this subject can be found in our 'Earthquakes' special.