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Three months before the Cannes Film Festival, a giant drill digs under the Croisette to rejuvenate the sewerage network

2023-02-13T17:04:51.377Z


This “microtunnelling machine” must work without causing the slightest pollution, whether visual or sound, or interrupting road traffic on the prestigious boulevard, promises Mayor David Lisnard.


Le Figaro Nice

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In line with the municipal project to beautify and modernize the Croisette led by David Lisnard, the city of Cannes and the Cannes Lérins urban area, both supported by the State, the departmental council and the agency eau are currently carrying out work to modernize the underground networks.

"

A major project, on invisible but essential networks for the life of the city

", summarizes the municipality by means of a press release.

The objective is to completely restructure the wet pipes (drinking water, rainwater and waste water), some of which are more than a hundred years old.

To carry out the renovation of the wastewater network, the Agglomeration favors the innovative and somewhat spectacular technique of the "microtunneling machine" - a sort of giant drill.

This must create, without a trench and while maintaining traffic on the surface, a main collector at great depth in order to recover part of the wastewater from the east of the Cannes basin (Cannes, Le Cannet and Mougins) and route it to the Aquaviva wastewater treatment plant, located near the

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The first of the two “microtunneling” drill heads arrived on site at the end of last week and was inaugurated with great fanfare on Friday February 10 by the mayor and president of the Agglomeration, David Lisnard.

According to the tradition of Sainte-Barbe, patron saint of workers, this one, baptized

La Belle Otero,

was placed under the protection of a godmother before starting her drilling work.

The second head, called

Éléonore

, will arrive at the end of March.

These works are the essential prerequisite before the surface developments planned from the summer of 2024 to oxygenate, modernize and strengthen the identity of the mythical Cannes boulevard and reinvent its legend of nearly two centuries.

We have chosen this rare technology, which is perfectly suited to work in urban areas because there is no need to dig trenches and interrupt traffic along the entire length of the site.

David Lisnard, Mayor of Cannes and President of the Cannes Lérins Agglomeration

“The restructuring of the wet networks of the Croisette is essential to protect the environment, limit discharges into the sea and fight against flooding.

These two microtunnel boring machines will make it possible to create a very large diameter pipeline in order to completely renovate our sewerage system, which is over sixty years old.

We chose this technology, which is rare and perfectly suited to work in an urban environment, because there is no need to dig trenches and interrupt traffic along the entire length of the site,

insisted David Lisnard during the ceremony.

Above all, it promotes rapid and less impacting works for the shops, the environment, the pedestrian promenade and the international showcase that the Croisette represents.

»

Entirely controlled and directed from the outside from a pilot station on the surface, the microtunnel boring machine ensures, like conventional tunnel boring machines, the excavation of the ground, the support of the walls of the tunnel, the evacuation of the cuttings and the laying of the pipeline, while keeping the pavements intact on the surface and reducing the nuisances of the construction site.

Cannes Town Hall

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Worth 35 million euros, this project is intended as a response to the priority issues of combating the risk of flooding and protecting the environment and the Mediterranean.

To collect all the wastewater from the east of the Cannes basin, the microtunnelling machine will dig a single pipe of very large diameter (2 m), over a total length of 2320 m.

Located between 7 and 18 m deep, it will start from the Square de la Roseraie to the Esplanade Maréchal Leclerc.

Sewage will flow there by simple gravity.

They will then be pumped to the Aquaviva treatment plant.

Entirely controlled and directed from the outside from a pilot station on the surface, the microtunnel boring machine ensures, like conventional tunnel boring machines, the excavation of the ground, the support of the walls of the tunnel, the evacuation of the cuttings and the laying of the pipeline, while keeping the pavements intact on the surface and reducing the nuisances of the construction site.

During operations, “

the worksite areas are integrated into the landscape.

The barriers and palisades are covered with aesthetic tarpaulins, embellished with an exhibition of black and white photos of the stars who came to pose on the red carpet, and offer informative panels on the modernization works of the Croisette

, ”also assures the municipality.

".

Finally, site visits will be offered to the public.

Source: lefigaro

All news articles on 2023-02-13

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