Shield drilling is a ‘classic’ that is still used. This more traditional drilling technique can be used, for example, if from an environmental perspective the groundwater level must not drop. Pioneer Visser & Smit Hanab can now call on more than three decades of know-how and experience.
Shield drilling or closed front drilling are also possible below the groundwater level and work on the basis of earth pressure and fluid balance. A drilling shield that starts from a thrust pit closes the casing pipe off and carves itself a path with a rotating cutter wheel. The earth is mixed with water or bentonite. Pumps and transmission lines remove it to a separation plant or slurry depot.
This drilling system is particularly suited to pipes with a diameter of 600 to 3,500 mm. The installation of intermediate stations significantly extends the possible length of the route. Visser & Smit Hanab has various drilling shields for drilling different diameters. With our own designers, geologists, engineers, drilling experts and equipment specialists, we can execute projects in their entirety.
Would you like more information about shield drilling or do you have specific questions? Please do not hesitate to contact us at no obligation.