Equipment for continuous hole drilling in soil

Equipment for drilling a row of substantially equidistant holes in soil, comprising:

• a carriage attached to a traction vehicle for moving said traction vehicle along a predetermined path, said carriage being supported by at least one road wheel,
• at least one earth auger compriising a shaft and helical blades wound around said shaft, and cutting lips extending from an outer end of said shaft, said shaft being power-rotated about its central axis and fastened to said carriage by means of a substantially horizontal, revolvable axle, said axle being positioned substantially perpendicular to the direction of travel of said equipment at a predetermined height above ground level and being coupled to revolve said auger in a substantially vertical plane sustantially parallel to said direction of travel, the depth of said drilled holes being defined by the distance of the outer end of said shaft of said auger from the axis of said axle,
• at least one cultivator-shaped blade mounted on said substantially horizontal rotatable axle, forward of said at least one auger, for loosening the soil before entry of said cutting lips of said auger into the soil,
• a power source and transmission coupled to rotate said auger about its central axis, and
• means for revolving said at least one auger about said substantially horizontal axle so that the rotational speed of said auger is a function of the travel speed of said equipment.