Views: 25 Author: Site Editor Publish Time: 2024-08-16 Origin: Site
The tower crane, a pivotal heavy-lifting equipment in modern construction projects, undergoes a complex yet intricate installation process. This article delves into the various steps involved in installing a tower crane, providing a comprehensive understanding for readers.
Before commencing the installation, a thorough survey of the construction site is essential. This includes assessing the ground's load-bearing capacity, identifying nearby obstacles, and determining the crane's optimal lifting position.
Precisely measure the installation area to ensure the foundation complies with design specifications. Simultaneously, prepare all necessary installation tools and materials, such as pins, bolts, hydraulic cylinders, and more.
Install the tower's base section (typically weighing around 8,570 kg) onto the pre-prepared foundation. Connect the base section to the embedded legs using eight pins (e.g., ￠60×208/285). Utilize a theodolite or plumb line to check verticality, ensuring deviations are within the permissible range.
Lift the pre-assembled standard sections and attach them to the base section, securing them with similarly sized pins. Install the necessary number of standard sections based on construction requirements.
Hoist the climbing frame (weighing approximately 16,760 kg) and position it over the assembled tower body. Adjust the gap between the climbing frame and standard sections (ideally 2-3 mm), ensuring the side with the hydraulic cylinder aligns with the stepped side of the tower body. Connect the hydraulic cylinder and install the hydraulic power unit on the platform, connecting the hoses and verifying the hydraulic system's functionality.
Assemble the upper and lower bearings, rotation bearing, and upper bearing (totaling around 15,800 kg) on the ground, then hoist them as a unit onto the tower body. Securely connect them to the tower body and climbing frame.
Assemble the counter-jib on the ground, including walkways, electrical control cabinets, and railings. Hoist the counter-jib (around 12,640 kg) and attach it to the rotation unit using two pins (e.g., ￠110-275/370).
Hoist the cab (weighing approximately 800 kg) to its designated position and secure it.
Assemble the boom (e.g., 45 meters long) on the ground, including walkways and other accessories. Test lift the counter-jib to balance it, adjust the lifting points, and tie a guide rope at its base. Use a crane to hoist the boom and attach it to the tower's top, securing all relevant components.
Guide the main hoisting wire rope from the drum, through the tower cap, boom root, intermediate pulley on the boom, and finally to the hook. Secure the rope at the boom's tip.
After installation, measure the tower crane's verticality from two directions, ensuring deviations are within the allowable limits (e.g., 4‰). Conduct commissioning and operational checks to ensure all components function correctly.
After self-inspection, apply for inspection by a government-approved testing authority. Once passed, obtain the inspection report and certificate of conformity.
The project manager's team should apply for a joint acceptance inspection by the company, supervisor, client, and safety regulatory authorities. Upon successful inspection and issuance of a usage notice, the tower crane may commence operations.
Installing a tower crane is a complex yet meticulous process requiring strict adherence to operational procedures. This article provides an in-depth understanding of the installation steps, ensuring the safety and smooth progress of construction projects.
