Construction, repair, maintenance and demolition of buildings and of civil engineering constructions; installation and fitting of parts and fittings for buildings; construction, installation, renovation, grout reinforcement, cement strengthening, maintenance and repair of foundations; stabilization, underpinning and strengthening of soil, earth and ground by cement and grout injection, by compaction and/or by insertion of reinforcing materials and/or piling; sealing of porous ground strata; tunneling and ground drilling for transportation systems, bridges, roadways, railways, water, sewage and drains, electricity, gas, telecommunications, baggage handlings tunnels, deep water drilling, ground stabilization and settlement control, and construction and repair of buildings; repair, restoration, maintenance and underpinning of buildings, walls, bridges, tunnels, mines, airport runways, embankments, dams, docks, quays, jetties, piers, groynes and of moles; prevention, diminutiom and correction of building subsidence and settlement; engineering demolition of houses and buildings; and construction and repair of houses, buildings, transportation systems, bridges, roadways, railroads, and dams, levies, seawalls, and tunnels