ARCO Forepoling

The GeoLSA / ARCO ARCO Forepoling gréasán is a specialized excavation tool designed for advancing tunnels and mine workings through challenging geological conditions. Forepoling is a critical ground support technique used in soft ground, water-saturated, and unstable formations where conventional tunneling methods prove inadequate. This gréasán enables controlled advancement by pre-installing horizontal structural elements—typically steel pipes or timber—ahead of the excavation face, creating a stabilized tunnel crown and reducing settlement risks.