L68A1 Mast SectionUnderstand the basic requirements of tower crane working environment
Good working environment is conducive to improving work efficiency, so is tower crane. Today, we learn about the basic requirements of the working environment of the lower tower crane and the conditions under which the operation is not allowed?
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1. The foundation of fixed tower crane must be set with reinforced concrete foundation, which must be able to bear the maximum load under working condition, and meet the requirements of transverse deviation, longitudinal deviation and track gauge deviation of tower crane foundation.
2. The track shall not be directly laid on the underground buildings (such as underground ditch, civil air defense and other facilities).
3. The pavement must be compacted before gravel laying. The crushed stone foundation of the track must be leveled and compacted, and the crushed stone shall be filled between the road and wood. The rail joint must be supported by wood and shall not be suspended. Drainage ditches shall be set on both sides or in the middle of the subgrade, and the subgrade shall not accumulate water. The thickness of ballast layer shall not be less than 20 cm (10 cm above and 10 cm below the sleeper); the particle size of ballast shall be 25-60 mm.
4 the crane rail shall be connected with the Road timber through the cushion block. One track gauge pull rod shall be set for each track every 6m.
5. The track of tower crane shall be equipped with at least two groups of grounding devices. If the track is longer, one group of grounding devices shall be added every 20 m, and the grounding resistance shall not be greater than 4 Ω.
6 the bearing capacity of subgrade soil must meet the requirements of special safety construction organization design (construction scheme).
7. Limit position stopper must be set at the place 1.5m away from the track terminal, and its height shall not be less than the radius of traveling wheel.
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8 during winter construction, the snow and ice on the track must be removed in time. During the construction period, the crane shall check the track foundation every week or after rain and snow. If it is found that it does not meet the requirements, it shall be adjusted in time.
9. After the track laying of tower crane is completed, the installation of tower crane can only be carried out after it is inspected and accepted by relevant personnel.
10 it is forbidden to stack any materials in the middle of the track within the traveling range of the tower crane.
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