Bulldozer

A  was a device used for moving large amounts of material.

The Third Doctor arrived in 2971 after he was asked by millionaire John Henderson to drive his time-travelling bulldozer into the future. (COMIC: The Kingdom Builders)

In the wake of Miracle Day, Tutsi in Rwanda bashed the heads of Hutu villagers with clubs and ran over them with bulldozers. (TV: Rendition)

In a jungle on an unnamed world, the Quarks attacked the Second Doctor and Jamie McCrimmon. They defended themselves from the Quarks with bulldozers. When the Quarks were later driven off, the Doctor used the bulldozer to excavate the TARDIS from the rubble under which it was buried. (COMIC: Jungle of Doom)