Safety management of group tower cranes?

The safety management of tower crane group is very important. Safety management can effectively improve the construction environment, deal with every detail and ensure safety on the premise of ensuring construction efficiency and project quality. Zhong Da Consulting will explain the safety management of group tower cranes for you.

A, tower crane location layout is reasonable, highly balanced and coordinated tower crane centralized layout, crossover operation is rare in recent years. Justin Jinjiang Phase II Project is large in scale, short in construction period and heavy in workload (the commercial concrete is transported vertically by tower crane), and it is located in downtown area. To this end, we first formulated the tower crane layout scheme and height balance coordination scheme. 1, tower crane layout should be based on the actual situation, so that the lifting range of tower crane covers the whole construction surface as much as possible, without producing blind spots or less, and there should be enough safe distance between adjacent tower cranes. 2. Avoid adjacent buildings and structures (such as high-voltage wires). ) within the swing range of tower crane. 3. Ensure that the buildings within the scope specified in the tower crane manual have reliable anchorage positions (changes and positions of balcony and central structure should be avoided). 4. Ensure that after the completion of the project, there is still enough space to facilitate disassembly and transport the parts out of the construction site. 5. Many tower cranes may work at the same time and cross each other on the horizontal plane. In order to prevent the collision accident of the boom, the installation height of the tower crane should be staggered in strict accordance with the provisions of the construction plan. According to the safety standards for building construction, when multiple tower cranes are working, the distance between the end of the low tower arm of the fixed tower crane and the high tower body, and the vertical distance between the hook of the high tower and the low tower should not be less than 2m. 6. When multiple tower cranes are working at the same time, the height difference and anchorage time difference before and after the tower cranes should be seriously considered to ensure that the height difference between the tower cranes is maintained during the construction of the main structure. In case of special circumstances or conflict with the plan, it should be adjusted in time. The anchorage distribution of tower crane in this project is shown in the attached table. Second, scientific management and correct use of tower cranes play an extremely important role in the construction activities of modern engineering construction and play an irreplaceable role. How to use it safely and give full play to its efficiency is the basic task of tower crane management in construction enterprises, and it is also the working goal we strive to pursue. The most important thing in site management is to prevent accidents, reduce the failure rate of equipment and improve the utilization rate of tower cranes. Generally speaking, the direct cause of accidents is the unsafe behavior of people and the unsafe state of things. Therefore, in order to eliminate hidden dangers and prevent accidents, we strengthen the following aspects: 1, and strengthen communication with the project department. Because the vertical transportation of all materials in the construction site depends on the tower crane, the tower crane will play an extremely important role in the construction of this project. During the use of tower cranes, according to the construction progress of the project, timely communicate with the construction personnel of the project department, reasonably arrange the jacking and maintenance time of each tower crane, timely understand the construction progress of the structure, and set the embedded parts in time. Coordinate tower cranes to avoid each other when working in cross-coverage areas, and coordinate the relationship between operators, signalmen and teams. 2. Strengthen the management of special personnel on site. On-site installation and maintenance workers (including mechanics and electricians) and tower crane operators must be held by personnel who have obtained corresponding qualification certificates through professional skills training. The signal commander uses walkie-talkie to contact the driver for command, and each tower crane has a dedicated channel. It is forbidden to interfere with each other. Drivers should be appointed by individuals, and it is forbidden to transfer posts without permission. Due to the particularity of this project, the management personnel are designated for command and coordination, and two mechanical maintenance workers and 1 electrician are arranged on site every day. On-site personnel take their positions and can get in touch at any time. Tower crane faults can be repaired in the shortest time to ensure the continuity of engineering construction. 3, strengthen the maintenance of tower crane (1) tower crane approach should be strict quality control, after installation should be qualified according to the procedures before put into use. (2) maintenance. Daily maintenance is essential. Only using without maintenance will accelerate the wear and consumption of equipment, and incorrect maintenance will also bury hidden dangers, threaten safety and hinder its effectiveness. At the same time, carry out maintenance, stipulate the correct maintenance methods, materials, tools, time and the responsibilities of the executives, and form a rule-based system to ensure uninterrupted maintenance. (3) Inspection and repair work. Run through the whole process of equipment management and use. Each tower crane requires the driver to do the inspection before and after work, weekly inspection and monthly inspection; In addition to daily maintenance, the maintenance personnel shall arrange a monthly inspection, and the branch shall organize monthly inspection and quarterly inspection, and make inspection records. Find problems and solve them in time. It is forbidden to run the equipment in spite of illness, leaving no hidden dangers. 4, strengthen the safety management of field use (1) requires tower crane drivers to strictly abide by the operating procedures, it is forbidden to operate illegally. (2) When lifting objects, it is forbidden for the boom to cross the surrounding streets. (3) In the process of operation, if the brake of the hoisting mechanism suddenly fails, the boom shall be immediately transferred to an unmanned safe place, and the heavy objects shall be lowered at a low speed. In case of sudden power failure, you must immediately cut off the power switch, reset the controller to zero, and warn the field personnel not to stay under the boom and heavy objects. Turn the boom to an unsafe place by manually turning the rotating motor, then release the brake of the mechanism to make the heavy objects fall to the ground slowly, and take measures immediately after the arrangement is ready. (4) In case of bad weather such as typhoon, tower cranes are strictly prohibited and reinforced when necessary. (5) When the tower cranes cross-operate, they should obey the unified command to prevent confusion during busy hours. (6) Burying, anchoring and jacking shall be carried out in strict accordance with the planned elevation. (7) When the tower crane is working along the street, it must do a good job of jacking and maintenance, and it is forbidden to fall from the sky and hurt people. (8) Do a good job of lightning protection and grounding, and install red obstacle lights at the top of the tower and two arms to ensure sufficient lighting for night work. (9) Each tower crane shall conduct settlement observation and verticality measurement on a regular basis. (10) Organize the information in the industry in time and file all kinds of records. (1 1) Make a practical and reliable emergency rescue plan. Third, eliminate hidden dangers and prevent accidents With the widespread use of tower cranes in construction sites, the labor force has been greatly liberated, the speed of modernization has been accelerated, and great economic and social benefits have been created. At the same time, tower crane accidents also occur frequently, laying a great hidden danger for users. Except for the design defects of the tower crane itself, most accidents are caused by misoperation and hidden dangers. As a manager, in addition to being familiar with the equipment status, we should also analyze, summarize or further update the problems in field operation. (1) In this project, we will classify the equipment failures every month, and the technicians will express their opinions, put forward prevention and solutions, and make a careful comparison and summary. (2) Scientific analysis of difficult problems and adoption of the best solution. In this project, two QTZ 125 tower cranes (4# and 5#) once lost control of their hoists, and after eliminating various reasons, they were finally locked into the power supply defect of electromagnetic clutch: the power supply voltage of clutch was 24V as required, but it was only 15.8V after the actual line voltage drop, and the line was used normally after adding transformers, thus eliminating the hidden danger of accidents. (3) In the face of special circumstances, we should actively explore and deal with them calmly. During the construction of this project, due to the slow progress of 2# construction, when the construction reached 14 floor, 1# and 3# buildings blocked the rotary travel of 2#QTZ63 tower crane, which made the construction impossible. After careful consideration, the main crane is used to unload the rear arm counterweight 1, and the tower crane 1#QT80A is used to dismantle the forearm 1 section (5m), so that the construction of No.2 can be continued in a short time. (4) Although there are feasible schemes and strict management in engineering construction, there are still some hidden dangers in multi-tower cross operation. Occasionally, the boom of the low tower touches the main hoisting wire rope of the high tower, and so on. Therefore, we plan to add electronic collision avoidance system or electronic operation area limiter (single machine restricted area) in the future. Four. Conclusion In the whole construction process of the project, we have established a set of strict, effective, scientific and reasonable management systems and specific measures, and strictly implemented them. Through the joint efforts of relevant personnel, people, equipment and environment are organically combined to ensure the safe operation and efficiency improvement of tower crane. So that the project can be successfully completed. At the same time, after careful summary, we put it into practice again with more mature experience in the project of Qiaorong Jinjiang District D.

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