System of examination, acceptance, inspection and so on for installation and disassembly of high-rise tower crane hoist
High-rise tower hoist brings convenience to construction, but also further increases the risk of Tower hoist. Therefore, enterprises should attach importance to the safety management of the installation and disassembly of high-rise tower cranes, and formulate strict examination, acceptance, and inspection systems to prevent the occurrence of Tower cranes.
1, qualification
Units engaged in the installation and demolition of Tower cranes at construction sites must obtain professional contract qualifications. The installation and demolition workers must be trained in professional safety techniques and be certified for duty.
2, approval system
We will establish a secondary examination and approval system for the installation and demolition of high-rise tower cranes. Before lifting a tower, according to the environment and conditions of the construction site, the mechanical properties of the tower crane and the characteristics of the auxiliary lifting equipment, plans for installation and disassembly and targeted safety and technical measures shall be drawn up and examined and approved by the professional construction(property rights) unit and the technical person in charge of the general contractor unit. Implementation after signature by chief engineer.
3, acceptance
According to the approved high-rise tower crane installation and demolition construction plan. The foundation of the tower crane shall be accepted before the overall installation; Prior to installation and disassembly operations, the targeted security technology must be signed and handed over, and the division of responsibilities and unified command must be performed according to the operating procedures. In the demolition and assembly operation, each process should be designated as a person, a fixed post, and a fixed responsibility. A security zone shall be set up for installation and disassembly operations, and there shall be special supervision.
4, stability
The stability of the tower hoist must be guaranteed during installation and disassembly. The layout and spacing of the straight parts attached to the tower hanging shall conform to the specifications.
5, comply with manual requirements
High-rise towers shall strictly observe the specifications when lifting and descending. During the lifting operation, the hydraulic system shall carry out the empty load operation, adjust the gap between the roller of the top hoist and the standard section of the tower body, so that the lifting moment and the balance moment are balanced; During the lifting process, the mechanical braking will be returned, and the lifting of the tower and other operations will be strictly prohibited; The lifting operation should be carried out during the day, and the wind power must stop at level 4 and above; It is strictly forbidden to remove the attachment bar until the suspension is removed to the permissible cantilever height.
6, acceptance, inspection management system
Strict implementation of the use of high-rise tower lifting inspection and inspection management system. When the whole installation of the tower crane is completed, it must be jointly accepted and accepted by the general contractor, subcontractor(user), rental unit and installation unit, and the relevant testing qualification unit approved by the construction administrative department shall be entrusted for testing. No tower crane shall be put into use unless it has passed the inspection and acceptance.
The competent departments in charge of the industry shall strengthen the supervision and administration of Tower cranes at senior levels, gradually establish the qualification management system for tower cranes production enterprises and tower cranes leasing enterprises from the quality to the use of Tower cranes, and strengthen the qualification management of professional installation and demolition units. The safety supervision institutions should also strengthen the supervision and management of high-rise tower cranes entering the construction site, and establish a record and registration system for high-rise tower cranes.
