Tower crane - crane installation and removal techniques

Tower crane - crane installation and removal techniques
Construction site, to address the construction phase of the vertical transport, accelerate the construction progress, improve the level of modern construction mechanized operations, according to the actual situation of the construction site, usually in the middle of the building or side installation of certain stationary  Hoist equipment  .

Set of standard tower crane installation, dismantling and operation of technical safety tests, vital, and we must project department technicians are highly valued. This combined with the actual, to talk about the actual work installation, dismantling and operation of technical safety tests, procedures and content.
     One, indicating
     The installation as normal transitions (or a new purchase), the installation process should be strictly in accordance with the installation and removal programs are not free to change.

     Second, the installation sequence

     Chassis (with the water level leveling) → → coat rack standard section → → slewing tower cab → → → balance arm balance block (from the top of the tower root nearest location) → boom (including rod, etc., the center of gravity away from the arm root) → balance blocks (all the rest) → Debug → jacking bracing → → → Use acceptance.

     Third, the disassembly sequence

     Tower crane fall (reduced initial installation height) → balance weight (close to the roots of a tower) → → balance arm balance arm → tower block → → → rotary mechanism → sets the cab stand and standards section → chassis.

     Fourth, security measures

     Installation (removing) the person in charge before the job by the general organizational learning install security technical requirements for all operations personnel conduct technical tests, daily work content on sub-tests, one by one: Go to the job site must wear helmets, high-altitude operations to fasten seat belts, wear non-slip shoes; case of overhead transmission lines should be taken to keep a safe distance; top wind speed greater than 13 m / s prohibition operations; sets of planes, the upper and lower bearings, front and rear arms and other equipment before lifting operations, the technical person in charge must be carried out special safety technical tests, each hanging about 20 cm from the ground must be shut down, check the security stability, safety and reliability can only confirm to continue lifting; long, large objects hanging points should be accurate to ensure balanced hanging objects, lifting rope before the application of solid bring the two ends tied firmly to prevent heavy rotation, swing and collision; install the operating area of ​​5 to 10 meters should be located within the security cordon, send someone to guard the construction site, non-operating personnel must not enter cordon.

     V. Notes installation and removal

     An installation before the technical preparations and precautions

     (1) Press the tower  hoist equipment  foundation design specifications and requests for information, check the quality of the key parts of the foundation construction.

     Detection tower crane foundation geometry errors, you should within the allowable range, measuring the level of error size so horn.

     Tower crane foundation construction should meet the strength requirements of this scenario.

     (2) detailed understanding of the technical condition of installation by crane, crane drivers technical responsible person shall explain the main components of the installation process and lifting the size, weight, height, mutually agreed to stop  lift hoist  into position, arm length and the elevation and other major technical parameters.

     (3) Install responsible person summoned installation personnel hoisting crane crew and command staff meetings to explain the implementation of common safety precautions, special clear crane leg support operations personnel in charge of the leg support must reach a solid firm.

    (4) crane installation personnel must be certified before they work, wearing a variety of labor protection products.

     (5)  hoist and trolley  connection between the various parts of the shafts, bolts, nuts, and cotter pin shaft card board manufacturers must use random or specified special pieces, not free themselves replaced.

     (2) Before installation personnel and tools preparations

     (1) foundation construction: construction shall be identified in the program Taki position to ensure basic settings, foundation bearing capacity ≥ 200kN/m2, ensure dense concrete, anchor position deviation ≤ 2 mm (bolt before installation by using the instructions drawings or construction program request processing). Installation of the tower machine, foundation concrete strength to reach 90%.

     (2) attached to the rack focus on concrete strength at ≥ 70% or more, embedded parts buried position deviation ≤ 5 mm.

     (3) to protect the construction site according to three criteria with installed power box.

     (4) must be overhauled before installation to ensure the good performance of the tower  lift hoist   Open flat construction sites, roads must be smooth, compacted, and there is sufficient installation personnel.

     (5) ready for hoisting machinery, installation tools, auxiliary equipment and technical information.

     3 Remove Precautions

     (A) demolition job, overall responsibility for all demolition personnel should be organized to re-learn safety precautions, conduct technical tests, the implementation of each task.

     (2) demolition workers clear division of responsibilities, their duties, have to concentrate to their work, and the dynamic observation tower on the top down, if the situation immediately stop inspection, fault is not excluded shall not continue to be demolished.

     (3) high-altitude operations personnel must wear seatbelts, with non-slip shoes, wear a helmet.

     (4) Check the hydraulic system, ensuring stable and normal, without jamming, bugs and other phenomena.

     (5) is not reduced to a predetermined height tower demolition, shall be attached to the wall demolition devices.

     Six, safety technical measures

     The overall responsibility for the organization of all installation (removal) measures to learn the content, conduct technical tests, the implementation of each task.

     An installation before the operations, organizational learning installation (removal) security technology solutions for organizations operating personnel for technical solutions correspondent, on the breakdown of work content, technical requirements, safety measures and precautions separate disclosure.

     (2) all installation (removal) must obey the unified command of the scene. Unknown if found or an error signal to stop operating, and then carry out the job to be contacted clear.

     3 operating personnel trained passing the examination, the driver, lifting conductor, electrical and inspection personnel to certificates, at the job site must wear helmets, seat belts when working at height, with non-slip shoes, winter, anti-slip measures should be taken during the rainy season .

     4 encounter with overhead transmission conductor places crane structure should avoid the danger of entering distance transmission wires, such conditions can not guarantee a safe distance, in consultation with the relevant departments to take effective security measures before erection.

     5 top wind speed greater than six or more, prohibiting operations. Install the base tower, the case of six wind above, prohibits job.

     6. Operating personnel must comply with the rules aerial, Do not drink and posts and other unsafe behavior altitude parabolic.

     Seven, staffing and responsibilities

     1 The total charge: responsible for the overall arrangements for the organization and coordination of the whole process of installation and removal of safety.

     2 Technical Leader: responsible for installing and removing technical tests before the demolition process inspection and supervision (including basic checking), the installation process of testing, installation and post-test data collected.

     3 person in charge of production safety: organizational personnel responsible for specific technical rules according to the installation instructions and the requirements of the tower crane operations and conduct process checks, coordination and command. Responsible for safety and operational tests, process safety oversight.

     4 Ann disassembly Captain: organization-specific safety procedures by operating personnel, security disassembly process and specification requirements for safe disassembly operations, and pay attention to the process of inspection, coordination and command.

     5 Field Command: In the captain of the arrangement, the command is responsible for lifting work.