The 7 pavilions of the cave of Salamandre
- Building Type : Other building
- Construction Year : 2013
- Delivery year : 2013
- Address 1 - street : Chemin de la plage du Roy 30430 MéJANNES LE CLAP, France
- Climate zone : [Cfb] Marine Mild Winter, warm summer, no dry season.
- Net Floor Area : 180 m2
- Construction/refurbishment cost : 620 000 €
- Number of none : 500 none
- Cost/m2 : 3444.44 €/m2
Primary energy need
(Calculation method : RT 2012 )
A "green box" for the Salamander.
In its descent towards the Rhone, the Cèze crosses the Méjannes-le-clap plateau through cut gorges where are hidden many sources and geological curiosities dug by this gold-bearing river. Caves or tunnels form a complex hydrological network and offer a vast territory of discovery and training to speleologists. The Aven de la Salamandre is known to lead to a circular cavity thirty meters high and whose dimensions are similar to those of a stadium with a diameter of a hundred meters.
Two portals in warheads mark the entrance of the site on the Commune of Saint-Privat de Champclos. Other visitors reach it by taking a botanical path about seven hundred meters long in a slight gradient. While following the profile of a contour line, visitors will be able to discover all the local flora in a green tunnel 700 meters long. Named in dense vegetation, we do not notice the reception pavilions built in local wood, Douglas fir and chestnut.
The path leads to a large wooden terrace where visitors contemplate a panoramic view of the Gorge of the Cèze. The terrace, shaded in summer, is covered by veils whose colors have been selected from the foliage of the site.
Eleven trees of hand-peeled roundwood poles support this belvedere overhanging the canopy at 11 meters above the ground. The shape of these sails, hung at the top of the reception building, accompanies the profile of the surrounding hills and reinforces the furtive character of this reversible equipment that is a part of nature.
The layout is functional so that all the elements of the program can be found immediately in this alcove repetition. In the center under the main arch is the lobby. In order to make this architecture reversible and to limit the amount of concrete used in this Natura 2000 classified zone, the concrete slabs are replaced by a bed of pebbles of the river below, surmounted by a wood floor with clear lane. Temperate cavity air at 12 ° C constant is brought into the building through the access tunnel forming a huge 75 meter long Canadian well.
The purpose of the development project is to make this cavity accessible to all publics, including the disabled. Two artificial tunnels, whose slight slope accompanies the visitors, are dug on the hillside to join the cavity. The two tunnels, 2.8 meters wide, have an emergency function. They serve as containment areas to shelter the public during an emergency and they must also be welcoming spaces where waiting is comfortable.
A gradient of atmospheres ensures the transition between the plant world from the outside and the mineral world in the cavity. The light of the diodes whose light spectrum has been chosen to stimulate the growth of plants from the plant ceiling and at the entrance of the tunnels is reversed to no longer be conducive to the development of algae or plants in the cavity.
Sustainable development approach of the project owner
For the construction of the reception pavilions, the natural site being classified in zone Natura 200, it was imperative to think of an ecological construction making use as much as possible with local materials.
Seven ogives built of local wood are stuck in the cliff and extended by a panoramic terrace cantilevered above the canopy. Eleven tree posts whose inclination imitates that of the surrounding trees support the vast terrace of 450m2.
See more details about this projecthttps://www.grottedelasalamandre.com/fr/
- 2,00 kWhep/m2.an
- 2,00 kWhep/m2.an
Not applicable, building unheated and tempered by a Canadian well connected to the cavity at 12 ° Celsius constant. The only electricity consumptions are those of the LED lighting powered by the photovoltaic panels of the pavilions.
- Canadian well
- No domestic hot water system
- Canadian well
- Natural ventilation
- Solar photovoltaic
- 7 200,00 m2
- 7 000,00
Chante paysages , Coté SUD et verti-cal Nord
Second œuvre / Équipements intérieurs
At the end of a monumental hall, the ceiling so densely adorned with mineral splendor, could not succeed the low and dull ceiling of a classical architecture.
Always to accompany the visitor in its crossing of the vegetable world to the mineral world: the vegetated vault, is also wanted to absorb the sound in this frequented reception hall.
It is home to hundreds of plants accustomed to live upside down and the root system turned to the sky. A collection of ferns, among which
the capillary of Montpellier, and Soleiroli Soleirola, who are tightrope walkers already observed, living upside down in the entrances of the caves. They are here joined by euphorbia, with almost continuous blooming, bright white, a collection of begonias, chlorophytums or other exotic plants ...
Design: VISION EURL, Jean -Francois Daures, Architect
Laying and assembly and maintenance: SARL Chante Landscapes - https://www.societe.com/societe/chante-522217876.html
Preculture, supply of plants: GAEC Coté Sud - https://www.pepinierecotesud.fr/
Production of steel cassettes: SARL Verti-cal Nord -https: //www.vert-tical.fr/
Innovative product, pilot realizationhttps://www.eyrolles.com/BTP/Livre/architecture-vegetale-9782212126747
Flexible and printable Photovoltaic Panels
They produce all the energy that is necessary for the proper functioning of the buildings but also the lighting of the entire cavity that will discover the spectators. At the same time dark and matt, flexible, they are posed on the roofs and curved to avoid dazzling the birds.
Innovative product, pilot realization
Construction and exploitation costs
- 2 500 000,00 €
- 50,00 €
- 62 000 €
- 62 000 €
Life Cycle Analysis
Reasons for participating in the competition(s)
- Construction and furniture 100% local wood
- Autonomous energy building (1st cave lit by solar energy)
- Building and cave 100% accessible to all types of handicap
- Green ceiling
- Construction in Protected Natura 2000 Zone
- 1st prize Arfobois 2013 competition
- Finalist of the Grand Prix of the Order of Architects - region Occitanie