1. the integral lifting of the grid frame, lifting equipment can be installed on the structure to lift the grid frame, and the grid frame can also be lifted while the column sliding form is constructed. At this time, the grid frame can be used as a lifting platform.

2. the load capacity of the lifting equipment, the rated load capacity shall be multiplied by the reduction coefficient, and the through-core hydraulic jack may be 0.5-0.6. The electric screw plate lifting machine may be 0.7-0.8; Other equipment shall be determined through tests.

Synchronization shall be ensured when lifting the 3. grid. The allowable lift difference between two adjacent lifting points and the highest and lowest two points shall be determined by checking calculation. Allowable lifting difference between two adjacent lifting points: when using a lifting trigger, it should be 1/400 of the distance between adjacent points and should not be greater than 15mm; When using piercing hydraulic jack, it should be 1/250 of the adjacent distance and should not be greater than 25mm. Allowable lift difference between the highest point and the lowest point: 35mm when using a lifting plate machine and 50mm when using a piercing hydraulic jack.

The resultant force point of 4. lifting equipment shall be aligned with the lifting point, and the allowable offset value shall be 10mm.

The stability of the lower support column 5. the overall lifting method shall be checked.

Shenyang Jianwei Steel Structure Engineering Co., Ltd. is a comprehensive large-scale construction steel structure enterprise, which includes general contracting of construction projects; professional steel structure design, manufacturing, installation and corresponding decoration and decoration. It has the first-class qualification for steel structure installation issued by the Ministry of Construction, the first-class qualification for steel structure special design and the first-class qualification for production issued by China Steel Structure Association. The company was established in 1999 with a registered capital of 15 million yuan. The company has total assets of 0.28 billion yuan and annual output value of 0.3 billion yuan. The company is a Sino-foreign joint venture, the shareholders of the company are Shenyang Jianwei Industrial Co., Ltd. and China (Hong Kong) Construction Steel Structure Engineering Company. At present, the company has nearly 780 employees, including nearly 140 managers, 46 middle and senior managers, 4 graduate students or above, 3 senior accountants, 4 senior engineers, 1 professor engineer, 1 doctoral student, 2 first-class registered structural engineers, 1 first-class registered architect, 1 first-class registered cost engineer, 17 second-class construction engineers, and 100 college degree or above. Especially in the field of steel structure design, it has internationally renowned software such as 3D3S and X-STeel, which is at the first-class level in China in terms of drawing disassembly and design. In addition, the technical support of VP Company of the United States in terms of light steel has enabled the company to take an international leading position in terms of steel consumption and optimized design. At the same time, the company has nearly 30 project managers at all levels, and many projects have won domestic awards.