preliminary work for construction
Organize relevant technical personnel to study, review and review the drawings, and negotiate with Party A on the questions and ambiguities in the drawings to confirm the negotiation results. According to the construction drawings, statistics of physical workload, arrangement of construction tools, construction equipment and labor use plan. Prepare the construction plan and organize the construction personnel to make technical disclosure. Prepare relevant construction quality inspection and acceptance specifications and quality forms. Clear quality objectives.
4.4.2.2 survey setting-out
1 Set out the positioning axis of the building according to the coordinates and leveling control points provided by Party A ... Re-measure the positioning accuracy of the embedded bolts and adjust the elevation of the anchor bolts.
Requirements: Axis deviation ≤ 5 mm.
The deviation of bolt center is less than or equal to 5mm.
Bolt elevation deviation is 0 ~+20mm.
2 according to the drawing size, draw the cross center line on the ground and the bottom plate of each column.
4.4.2.3 component receiving, transportation and inspection.
1 Arrange the parts delivery plan according to the supply plan provided by Party A..
2. According to the use order of components and the structural characteristics of components, the components should be unloaded and stacked reasonably. Fully consider the convenience of barge to avoid deformation of components.
3. According to the handover procedure of equipment and components, check and record the appearance, production quality, displacement and deformation of components.
4 Require Party A's representative/supplier to confirm on the parts inspection report.
5 The components and materials found in the inspection that do not meet the installation requirements must be repaired or replaced before they can be put into site construction.
Pre-assembly of 4.4.2.4 Trusses and Columns and Distribution of Components
1 according to the site conditions and structural characteristics, the butt columns and roof trusses in the production workshop are pre-assembled according to the principle of proximity, so as to improve the efficiency of equipment use during hoisting.
2. Assembling platform should be set up for on-site splicing of columns to ensure the splicing quality.
3 When allocating parts, consider the workspace and moving space of the equipment.
4.4.2.5 main structure installation
1 According to the weight of the pre-assembled truss and the hoisting height of the steel structure, select the corresponding hoisting equipment, slings, shackles and other tools.
2 Before hoisting, set measuring marks at the corresponding positions of the columns (for members with regular shapes, refer to the outline). The allowable deviation of column verticality is as follows:
Allowable deviation of single-layer column verticality: ≤ 10 mm.
Allowable deviation of verticality of multilayer columns: bottom column ≤ 10mm, upper column ≤ 35 mm.
3 according to the construction drawing of the main frame structure of each building, the structure is hoisted along the corresponding axis. When hoisting, it is required to assemble the whole body on the ground for hoisting, and arrange the assembly on the ground as far as possible to reduce the amount of aerial work.
4 Parts connected with high-strength bolts shall be fastened with corresponding torque in strict accordance with the connection requirements of high-strength bolts (initial and final screwing).
5 After the initial two-span to three-span main structure columns are hoisted, the installation accuracy of the structure should be adjusted to facilitate the subsequent installation adjustment.
6 The column beams, column beams and beam-beam connection points that need to be welded in the main structure must be welded in strict accordance with the welding requirements on the drawings.
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