Super high-rise tower crane is a mechanical operation with potential safety risk, which is responsible for vertical transportation in the project. With the application and development of super high-rise tower crane, the application of safety technology is deepened. Through safety technology, the quality and performance of super high-rise tower crane are protected to meet the safety requirements of engineering construction. The safety technology in the super high-rise tower crane has practical advantages and is fully applied to the operation of the super high-rise tower crane.
1、 Risk analysis of super high tower crane
The scale of super high-rise tower crane is large, and it has obvious characteristics in the vertical height, which makes the super high-rise tower crane face a series of safety risks. Combined with the application of super high-rise tower crane, the common risks are listed as follows:
1）. Falling objects
The risk of falling objects is the largest, which belongs to the main control point in safety technology. It refers to the falling accident in the process of super high-rise tower crane itself or transporting heavy objects, which causes great safety threat in the construction site and has destructive characteristics. Once falling objects occur, it will cause a great degree of risk loss, such as economic loss, construction period delay, etc.
2）. Risk of shaking and loosening
The risk of shaking and loosening in the super high-rise tower crane is mainly caused by improper installation, and part of the reason is improper use [1]. When the on-site personnel find that there is a risk of shaking and loosening of the super high-rise tower crane, they should immediately stop the operation and arrange maintenance work to ensure the safety and reliability of the mechanical equipment of the super high-rise tower crane.
3）. Electric shock accident
Because the equipment of the super high-rise tower crane is basically metal, the probability of electric shock accident is increased. No matter in the operation or maintenance of super high-rise tower crane, electric shock accident shall be prevented, and insulation protection measures shall be taken to prevent personnel from being affected by electric leakage and reduce the probability of electric shock accident in the safety risk of tower crane.
2、 Safety technology in super high tower crane
The application of safety technology should be implemented in the installation, application and removal of super high-rise tower crane, and the application of safety technology should be analyzed in combination with the risk classification of super high-rise tower crane.
1）. Safety technology in the installation of super high tower crane
In the early stage of the installation of the super high-rise tower crane, it is necessary to prepare the installation plan of the tower crane according to the needs of the project and master the basic parameters of the super high-rise tower crane [2]. First, the installation personnel shall draw the operation flow chart, coordinates, height and other data of the installation of the super high-rise tower crane, which shall be accurately calculated. According to the flow chart, the machinery required in the installation of the tower crane shall be configured to reflect the installation position prepared on the site. The installation of the tower crane must be carried out by professional personnel in strict accordance with the installation sequence, so as to ensure the safety of the lifting parts and lifting points. Then, the super high-rise tower crane shall be installed The acceptance work of high-rise tower crane is divided into stages. After the stage installation, the installation performance of the super high-rise tower crane is checked by trial operation. If potential operation problems are found, the installation personnel shall take the initiative to eliminate the potential risks and make records of the acceptance work so as to arrange the use of control. Finally, the application of safety measures is mainly to protect the safe operation of the super high-rise tower crane According to the status of installation, the emergency protection scheme is planned to clarify the protection role of safety technology and reduce the risk of installation of super high-rise tower crane.
2）. Safety technology in the application of super high tower crane
The risk in the application of super high-rise tower crane is relatively high, which should meet the safety requirements of building construction and avoid potential safety risks [3]. In the use of tower crane, attention should be paid to the safety control of rotating tower body, lifting arm, support and other positions, so as to fully protect the safety degree of the application of super high tower crane and actively prevent safety risks.
Taking a super high-rise tower crane in a project as an example, this paper analyzes the key points in safety technology, such as: (1) in a certain operation, the super high-rise tower crane uses two support beams, the support span is up to 9m, it needs to bear the weight of 230t of the tower crane itself, and it is easy to have a safety accident under the condition of insufficient stress. In the most vulnerable position of the support beam, the special The thickened wall is used to provide sufficient support force to ensure the safe operation of the super high-rise tower crane; (2) the tower crane operator shall take the post with certificate. Before the operation of the tower crane, check whether the mechanical safety protection measures are in place. The operator shall operate the super high-rise tower crane accurately according to the commander. If there are problems such as unclear command signal during the operation, the operator shall not stop the operation at will Start the tower crane machinery; (3) at the construction site transported by the tower crane, especially under the transported heavy objects, it is strictly prohibited for personnel to stay, so as to protect the personal safety of the construction site; (4) in case of failure during the operation of the super high-rise tower crane, the instructor shall command the operator to lower the transported heavy objects to a safe position, forbid the suspension and stop of the heavy objects, and enter the working state again after the completion of maintenance.
3. Safety technology in demolition of super high tower crane
In the demolition of tower crane, the demand for safety technology is also high, to ensure that the super high-rise tower crane can safely complete the demolition work. During the demolition operation, the staff shall wear safety helmets and relevant safety devices. If high-altitude demolition is involved, they shall also wear safety belts accurately. According to the demolition plan of super high-rise tower crane, the demolition work shall be completed [4]. Although the demolition schemes of different tower cranes are different, the goal of safety technology is the same.
According to the safety technology in the demolition of super high-rise tower cranes, several precautions are put forward, such as:
(1) when the environment of super high-rise tower crane itself is at risk, the mechanical equipment of the tower crane shall be fixed, and the demolition work shall be carried out after the environment is stable.
(2) to prevent the bolt from breaking during the demolition, attention shall be paid The preciseness of demolition behavior.
(3) the demolition project of super high-rise tower crane shall be kept independent to a certain extent, and shall not be carried out at the same time with other works as far as possible, so as to maintain the safety environment of tower crane demolition and eliminate the interference of external factors.
(4) according to the demolition plan of super high-rise tower crane, professional personnel shall be arranged to complete the demolition work, during which supervision personnel shall be arranged to standardize the demolition behavior and improve the super elevation The safety of the removal of the layer tower crane is conducive to the safe use of the next equipment.
