Par Lilou Boulanger
Published on Dec 22, 23 at 7:00 p.m. See my news Follow Le Républicain Sud-Gironde
A Girondist found a solution to reinforce the dikes along the Gironde Garonne, with inexpensive local clay.
Benoît De Griève has been working in the world of stones for 20 years.
For around ten years, he has looked at excavated soil, and today, he is proposing a solution for tomorrow in order to respond to environmental issues in particular.
3.5 tonnes of earth waste
When a trench is made in the Gironde department, to bury cables for example or carry out work, the earth that is removed is taken to old quarries in order to be disposed of.
With his company DgstoneBenoît De Griève noted that this lost land could be valued today.
On the one hand to reinforce the dikes thanks to the clay found in them and on the other hand to reinforce the roads.
The specialist in the recovery of excavated earth looked at the figures to try to explain his solution.
Videos: currently on Actu
The Department of Gironde today consumes 10 million tonnes of stones per year, it produces only 5 million. There is therefore a deficit which is filled by the production of neighboring departments.
In addition, the Department generates 3.5 tonnes of soil waste, “if we recycle even 20%, there will be fewer trucks on the roads, and the carbon footprint would be less disastrous,” explains he.
Clay, an expensive commodity
In this lost land, there is a part that is clayey. Clay is impermeable, so the more of it there is in the dikes, the less water they will let through.
Floods occur regularly in the department, and the maintenance and repair costs are astronomical, particularly because the clay has to be fetched far away.
Benoît De Griève, specialist in the valorization of excavated soil
With the recovery of lost land, according to the specialist, costs could be reduced. “It’s a real problem to find clay, but we forget that we have it on hand, almost everywhere in the Department. »
And according to Benoît De Griève, there are several interests in recovering this land. First, to revalue waste through the operation of a circular economy.
Also, from an ecological point of view, stocks of clay could be placed throughout the Department in areas facing flooding, this would reduce transport, and therefore the carbon footprint. And ultimately, it would be cheaper than other solutions.
Finally, the rest of the land that was not used for the dikes could be used to fill in the roads. “Often, it is sand that is used, and it turns out that there is some of it in the rest of this land,” explains Benoît De Griève.
For the moment, this technique is not implemented, because Benoît De Griève is looking for land where he could develop this solution.
He must also initiate discussions with the municipalities facing flooding. “Elected officials have a role to play, the means are there, we simply need to connect them all, this development is in the public interest. »
Follow all the news from your favorite cities and media by subscribing to Mon Actu.
2023-12-22 18:34:24
#Girondin #solution #filling #dikes #local #clay
