I. Construction Survey \x0d\ During construction, the ground elevation difference of the enclosure line should be measured first, and the foundation elevation of the enclosure should be segmented according to the elevation difference, which needs leveling. The position without conditions should be kept for a long time as far as possible, and the height difference caused by the ground should be adjusted step by step. The verticality and straightness of the column should be ensured. Use theodolite to release datum line according to the drawing in advance, and mark the center point of the column with a ruler. During construction, set several control columns every four or according to the situation, and check their elevation and line position. After confirmation, hang the middle column. Should wait until the strength of foundation concrete reaches more than 70%, then start hanging load around the baffle. \x0d\ II。 Form of enclosure structure \x0d\ Construction enclosure structure adopts blue light color steel plate with a thickness of 0.3mm and a height of 2m. The top and bottom of the enclosure are respectively provided with steel grooves with the height of 10cm, and a steel column anchored to the ground is set every 2.9 meters. The lower seat of the column is made of C25 concrete with a height of 50cm×50cm×50cm. \x0d\ III。 Enclosure decoration \x0d\ advertising cloth is pasted on the enclosure wall as a decorative material, and the slogan reflects the corporate culture or safety production. The slogan of the enclosure mainly includes: the name of the project, the name of the contractor, the telephone announcement of complaints, the terms of safe and civilized construction, corporate culture, etc. The advertising cloth is white on a blue background. \x0d\ Other advertisements (except public service advertisements), wires, articles and graffiti shall not be posted on the enclosure wall.