LANDDGRADING OR LANDDLEVELING METHOD BY BULLDOZER EQUIPPED WITH LASER LEVELING DEVICE

摘要

PURPOSE:To perform land-grading or land-leveling work in a smooth and stable manner by providing a laser beam reflecting mirror at a point where the beam is not intercepted by working machines when the work is performed by means of the bulldozer equipped with a laser leveling device. CONSTITUTION:The concrete mixture is brought in from a bring-in route S-4 to a surface S-1 to be leveled by a dump truck T and, after the truck leaves the place, the leveling work is conducted by the bulldozer B. On the occasion, a laser beam projector 1 is provided on a base rock S-2 and by turning the projector a laser beam reference plane is formed. The laser beam R from the projector is received by the beam receiver 3 of the bulldozer B, thereby the laser beam reference plane is detected, a level signal based thereon is inputted in a control device, and thereby the height of the blade of the bulldozer B is controlled to be a reference value. In this case, by providing the laser beam reflecting mirror 2 on a base rock S-3 positioned where the laser beam is not intercepted by the working machines such as the dump truck T, the interception of the laser beam to be received by the bulldozer B is prevented and thereby land-grading or land-leveling work of high accuracy is performed.