Associated skills

BESSAC undertakes complementary activities which are based on knowledge of the underground environment and either call for special know-how or innovative solutions which need special equipment.


SHAFT SINKING

Soldier pile walls, traditional timber shoring or steel sheet piling.

 

CONVENTIONAL TUNNELS

Assembly tunnels, back-shunt tunnels, connecting galleries, types of work which are impossible to undertake with a tunnel boring machine and which call for traditional excavation methods.

 

PIPE INSTALLATION IN TUNNELS

This type of work calls for using rolling stock, and specific handling equipment, coupled with sound knowledge of the underground environment.

 

REHABILITATION OF WORKS

Techniques adapted to suit the type of deterioration and geometry of the man-accessible works to be rehabilitated. BESSAC has developed equipment which can ream existing pipework thus enabling it to be relined without reducing the diameter.

 

SEWER CLEANING

BESSAC develops and uses specific equipment for sewer cleaning, thus enabling the mechanization of this process with a high productivity, and safe working conditions in hazardous environment.