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SEA-Tech News | The Mole

Introducing the Mole, SEA-Tech's new soil displacement drill bit. Suitable for most soil conditions, the Mole enhances the performance of soil nails and mini-piles and in addition dramatically reduces spoil waste removal from site. Installation is simple and effective and can be achieved by a wide range of standard drilling rigs. Drilling at a slow rotation speed the penetration is then synchronised to the head rotation. After 0.5mt to 1.0mt grout is pumped through to the drill bit at 10 bar, continuing until the designed depth has been achieved. The completed operation will provide a central grout column of 80mm diameter with an extension of a 140mm diameter helical column of grout (or soil mixed grout in softer ground formations).

The pictures show a typical Mole bit that has been drilled through 1mt of and old rail track and then a further 8mts of clay below. The drill bit was then retrieved to show it's condition after drilling. The mole drill bits are manufactured from a cast chrome steel the heat-treated for extra durability and robustness,resulting in a drill bit suitable to cope with the most difficult of ground conditions

mole 1 mole 2

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