Application of JLP3600 Flat-top Tower Crane in Thermal Power Project

——Engineering Case of Unit 3, Guangdong Yudean Dapu Power Plant

1. Project Overview

Guangdong Yudean Dapu Power Plant is located in Dapu County, Meizhou City, Guangdong Province, serving as an important power supply support point in eastern Guangdong. This project is the expansion of Unit 3 of the power plant, with a capacity of 660MW ultra-supercritical coal-fired generating unit. Upon completion, it will effectively improve regional power supply guarantee capacity.

Boiler body installation is the core construction node of this project. The boiler height is approximately 90m, and the maximum single-piece lifting weight is about 52t. The construction site features narrow space and dense surrounding structures, imposing high requirements on the layout space, lifting height and working radius of lifting equipment.

2. Construction Difficulty Analysis

Combined with site conditions and construction requirements, the lifting operation of this project mainly faces the following difficulties:

(1) Limited site. The working face width in the boiler area is less than 25m, making it difficult to arrange conventional tower crane foundations. The uneven foundation bearing capacity requires a foundation form with strong adaptability.

(2) Large lifting height. The installation elevation of the boiler top is about 90m. Considering the hook safety distance and sling length, the maximum lifting height of the tower crane shall not be less than 120m, and attachment devices are required.

(3) Wide component weight range. Heavy components such as boiler steel columns and large plate beams weigh 40-52t each, while light components such as heating surface tube banks weigh 3-8t each. The tower crane is required to have stable lifting performance at different radii.

(4) Tight schedule. The boiler body installation period is about 90 days. The installation, dismantling and jacking of the tower crane need to be minimized to reduce impact on the main schedule.

3. Equipment Selection and Technical Parameters

Considering the above construction difficulties, Jinli JLP3600-200t flat-top tower crane is selected as the main lifting equipment for this project. The main technical parameters of this model are as follows:

Parameter	Value
Maximum lifting capacity	200t (55t at 2-fold)
Maximum working radius	75m
Max lifting height (2 attachments)	164m
Hoisting speed	0-100m/min
Slewing speed	0-0.6r/min
Trolleying speed	0-60m/min
Foundation type	Brace base frame
Foundation size	18m × 18m
Foundation bearing capacity	≥200kPa
Mast section size	2.5m × 2.5m × 6m
Jacking efficiency	15 min/section

4. Application Scheme

(1) Foundation layout. The brace base frame foundation is adopted, arranged at the left expansion end of the boiler, with the foundation center 16m away from the boiler center. This foundation type requires no embedded anchor bolts or counterweights. The four legs are leveled by hydraulic devices and then directly poured with concrete cushion. The foundation construction period is shortened by about 7 days compared with conventional fixed-leg foundations.

(2) Attachment setting. According to the boiler height and installation progress, two layers of attachment are set: the first attachment at elevation 45m and the second at elevation 85m. The attachment rods adopt adjustable braces connected to the boiler steel frame. With two layers of attachment, the maximum lifting height of the tower crane reaches 164m, meeting the lifting requirements of the boiler top and rear furnace area.

(3) Lifting operation. Heavy components such as boiler steel columns and large plate beams are lifted under 2-fold working condition with a maximum lifting capacity of 55t, meeting the lifting requirements of the heaviest components in this project. Light components such as heating surface tube banks and platform escalators are operated at high speed to improve lifting efficiency. During the peak construction period, the average daily lifting volume of the tower crane is about 120 lifts.

(4) Jacking and mast climbing. The double-cylinder synchronous jacking system is adopted with a sliding sleeve frame structure, ensuring stable jacking process. A single standard section takes about 15 minutes to jack, and 2 to 3 sections can be added or removed per hour. According to the installation progress, a total of 3 jacking operations were carried out, each taking about 4 hours, without occupying the main construction window period.

5. Application Effects

The application of JLP3600 flat-top tower crane in this project has achieved good results, mainly reflected in the following aspects:

strong site adaptability. The brace base frame foundation covers a small area and has low requirements for foundation bearing capacity, successfully solving the layout problem of the narrow site.

high lifting efficiency. The 2-fold large-tonnage working condition covers more than 80% of heavy component lifting. Compared with conventional 4-fold tower cranes of the same level, the lifting speed is about doubled, effectively shortening the boiler body installation period.

convenient assembly and disassembly. The standard sections adopt integral connection technology and can be assembled and disassembled with special electric tools, facilitating transportation and transition. The installation and dismantling period is shortened by about 20% compared with products of the same level.

stable and reliable operation. During construction, the tower crane operated for about 1200 hours cumulatively without fault shutdown, with 100% equipment availability rate, ensuring the project nodes are completed on schedule.

6. Conclusion

The engineering practice shows that the JLP3600 flat-top tower crane has good adaptability and reliability in thermal power construction scenarios. Its technical features such as truss chassis foundation, large-tonnage 2-fold working condition and efficient jacking system effectively solve the construction difficulties of thermal power projects such as limited site, large lifting height and tight schedule, which can provide reference for similar projects.