Our services

We offer a full range of specialist services designed to meet all your needs in terms of underground cavities: drilling, backfilling, technical appraisals, sustainability consultancy, etc.

A "marnière" is the result of the exploitation of marl, soft chalk, which was used to improve farmland.

It was from the 19th century onwards that the exploitation of marl pits became intensive. Marling increased the pH of the soil and improved cereal productivity. Mining had to be declared in 1853, but there were no extraction standards. Mining inspectors were responsible for monitoring these operations.

What is a "marnière" ?

Survey of underground cavities

We provide comprehensive analyses, assess potential risks, and offer clear recommendations for the safe management of these spaces, essential to any construction or urban development project.

Showing management (stripping, drilling, etc.)

We offer a comprehensive showings management service, to effectively reveal and analyse the geological features of a site. Our approach ensures accurate documentation and informed decision-making, essential to any construction or development project.

Inspection of underground cavities

Carried out in collaboration with qualified well-diggers, the inspection enables in-depth exploration of underground spaces. We physically descend into the caverns to carry out detailed analyses, check the general condition and ensure that there are no new galleries or collapses.

Camera inspection

A detailed visual inspection of underground structures and pipes, this non-invasive method provides an initial view of the cavity prior to further investigations. This service provides a complete assessment, facilitating maintenance and repair planning.

Backfilling

We secure and stabilise underground cavities and voids using advanced techniques and appropriate materials. We intervene to prevent the risk of collapse and other structural problems, by filling empty areas effectively and sustainably, ensuring the long-term survival of the land and surrounding infrastructure.

a view of a tree through a hole in a rocka view of a tree through a hole in a rock
a group of metal bars with white text on thema group of metal bars with white text on them
Doctrine for government departments

Strategic assistance and expertise for the implementation of public policies relating to public works and town and country planning. This service ensures that standards of safety, efficiency and sustainability are maintained at all levels of the administration and execution of works.

Adress

102 rue du Bois Tison
Saint-Jacques-sur-Darnétal, 76160

Contacts

bureau@cavitec
02 35 61 30 19