| 摘要 |
FIELD: construction. ^ SUBSTANCE: addition to geodetic monitoring is carried out by a method of laser sighting with subsequent photographing of a laser beam trace on a mark screen. Continuous direction of laser sighting is provided with a laser on a pendulum, and the mark screen is equipped with a coordinate grid and is installed on a fixed point. With participation of design, construction or other safety organisations a scheme is drawn with points of a roof, ceilings, racks, in which the load at the roof is highest, and the probability of collapse is utmost. Laser radiators are fixed in these points. Them the mark screen with the coordinate grid is fixed onto pillars supporting the roof or foundation elements. At the distance of not more than 0.5 m from the mark screen there is an electric socket fixed to connect a power supply unit with a laser connection and disconnection panel. Displacement is identified by photographing of a laser beam trace on the coordinate grid of the mark screen. ^ EFFECT: addition to geodetic monitoring of displacement in certain points of a roof, ceilings, racks relative to walls, foundations. ^ 5 dwg |
