Tunnel and avalanche barrier

Sommand (74) - France


Chantiers Modernes, on behalf of the General Council of Haute-Savoie


Civil engineering - Calculation and design of temporary support and final linings of the tunnel, calculation and design of paravalanche downstream load and architectural design of the cap at the upstream, including local technical

Internal and external networks


The project is located on the RD 308 between Mieussy and Sommand . It consists of a paravalanche, and a tunnel of two heads.

The work requires the completion of earthworks and retaining walls for access to the eardrums with underground equipment, and installation of hangers in the open areas cantilevered.

The work requires the securing of the cliff located above the two heads, with installation of passive anchors and plated wire.