Bentonite tunnelling products , filtration additives, stabilizers and lubricants for tunnel drilling
Micro tunneling is a digging technique used to construct small tunnels, varying from 600 mm up to 4000 mm. Cebo offers proven CEBOGEL® solutions to ensure successful tunneling operations.
As the length of a tunnel increases, the friction of the ground around the pipe increases as well. To minimize this friction, firstly, over-cutting is used to create a slight annular between the inner edge of the tunnel and the outer edge of the liner. A well formulated Bentonite-based lubrication fluid is injected into the annular to decrease the friction and stabilize the formation.
In some occasions, it is necessary to utilize a Bentonite-based stabilization fluid in front of the cutter wheel to stabilize the formation until the lubrication fluid is injected into the created annular.