Lifting and hoisting operations are complex and potentially dangerous tasks that require meticulous preparation to ensure safety and success. Before commencing any hoisting operation, it is essential to organize relevant departments to conduct a comprehensive inspection in accordance with the requirements of the construction plan. This thorough inspection process is crucial for identifying potential issues and ensuring that all aspects of the operation are in order.
The inspection contents are extensive and cover several key areas. Firstly, it is necessary to determine whether the configuration of construction machinery and rigging is consistent with the plan. This step is vital as the correct configuration ensures that the equipment has the necessary capabilities and specifications to handle the intended load. For example, if the plan calls for a specific crane with a certain lifting capacity and rigging setup, it is essential to verify that the actual equipment on site matches these requirements. Any discrepancies could lead to overloading or improper handling of the load, increasing the risk of accidents.
Secondly, the presence of self-inspection and mutual-inspection records for concealed projects is crucial. Concealed projects often play a significant role in the stability and safety of the hoisting operation. These projects may include the installation of anchor points, reinforcement of structural elements, or the placement of underground utilities. By reviewing the self-inspection and mutual-inspection records, it is possible to ensure that these concealed projects have been carried out correctly and meet the required quality standards. This helps to prevent unexpected failures or collapses during the hoisting operation.
The position of the anchor bolts of the equipment foundation is another critical aspect to inspect. Anchor bolts, especially pre-embedded bolts, provide crucial support and stability for the equipment to be hoisted. It is essential to ensure that their positions meet the project quality requirements and are consistent with the bolt holes of the equipment skirt or base. Any misalignment or incorrect installation of anchor bolts can lead to instability of the equipment during hoisting, increasing the risk of accidents. For instance, if the anchor bolts are not properly positioned, the equipment may shift or tilt, causing the load to become unbalanced and potentially leading to a catastrophic failure.
The earthwork around the foundation also needs to be inspected. It must be determined whether the earthwork has been backfilled and compacted properly. Adequate backfilling and compaction are essential for providing a stable base for the equipment and ensuring that there is no settlement or movement during the hoisting operation. If the earthwork is not properly compacted, it can lead to uneven settlement, which can affect the stability of the equipment and the safety of the operation.
The construction site itself must meet the operation requirements. This includes factors such as sufficient space for the equipment to maneuver, clear access routes for the load to be transported, and a stable working surface. The site should be free from obstructions that could interfere with the hoisting operation or pose a safety hazard to personnel. For example, if there are power lines, trees, or other obstacles in the vicinity, they need to be either removed or properly protected to prevent accidental contact during the operation.
The equipment to be hoisted must also be inspected to ensure that it meets the hoisting requirements. This includes checking for any damage or defects that could affect its structural integrity or lifting capabilities. The equipment should be properly maintained and in good working condition. Additionally, the load capacity and weight distribution of the equipment should be evaluated to ensure that it can safely handle the intended load.
Ensuring a reliable construction power supply is also essential. The hoisting operation often requires a significant amount of electrical power for operating the equipment. It is necessary to confirm that the construction power supply can be guaranteed to be supplied continuously and without interruption. Any power outages or fluctuations could disrupt the operation and pose a safety risk. Backup power sources or contingency plans should be in place in case of power failures.
Understanding the personnel division of labor and command system is crucial for a smooth and coordinated operation. Each person involved in the hoisting operation should know their specific roles and responsibilities. The command system should be clear and efficient, ensuring that instructions are communicated effectively and actions are coordinated properly. Additionally, it is important to be aware of the weather conditions as they can have a significant impact on the operation. Adverse weather conditions such as high winds, rain, or snow can increase the risk of accidents and may require the operation to be postponed or adjusted.
Other preparations such as security, rescue, living supply, and reception also need to be implemented. Adequate security measures should be in place to protect the site and personnel. This may include fencing, security personnel, and access controls. Rescue plans and equipment should be available in case of emergencies. Living supplies and accommodations may be needed for personnel working on long-duration projects. Reception arrangements should be made for visitors and inspectors.
Only after confirming that there are no errors through inspection can the lifting command be issued. This is a critical step as it ensures that all aspects of the operation are in order and minimizes the risk of accidents. After construction personnel enter the operation post, they still need to inspect their own posts again. This double-checking is essential to ensure that nothing has been overlooked and that all equipment and safety measures are in place. Only when there are no errors after inspection can they stand by for operation.
If hoisting is required on the next day, personnel should be organized to conduct on-site security. This may involve patrolling the site, checking equipment and rigging, and ensuring that there are no unauthorized access or activities. On-site security is crucial to protect the equipment and site from vandalism, theft, or other potential hazards.
For example, imagine a large-scale construction project where a heavy piece of equipment needs to be hoisted. The comprehensive inspection process would involve multiple departments, including engineering, safety, and quality control. They would check the crane‘s configuration, inspect the foundation bolts, ensure the site is clear and stable, and confirm the power supply. If any issues are found during the inspection, they would be addressed immediately to prevent delays and potential accidents. Once all inspections are completed and no errors are found, the lifting command can be given, and the operation can proceed smoothly.
In conclusion, the preparation work for lifting and hoisting operations is extensive and crucial for ensuring safety and success. By conducting a comprehensive inspection and implementing all necessary preparations, it is possible to minimize risks and ensure a smooth and efficient operation.
