High-altitude bulk space frame installation and overall hoisting method
According to the actual situation of the site and the requirements of the construction period, the installation of the space frame is planned to be carried out by hoisting a single block as a whole, installing in bulk at high altitudes, and installing in strips and blocks.
Overall hoisting method The overall hoisting method is to assemble the space frame structure on the ground according to the hoisting unit dislocation according to the hoisting process requirements to form a whole. Then use the hoisting equipment to lift the space frame to the design height as a whole, and then move it in the air and fix it after locking the edge.
Process flow:
Technical preparations before installation→Assemble the space frame on the ground and inspect it→Preparation for hoisting→Test hoisting and hoisting→Place in the air→Fix the support Ground assembly precautions:
When assembling, according to the force of each bolt ball, support is provided under the bolt ball to prevent deformation of the space frame rods. After the assembly is completed, check whether each member is deformed and whether the bolt ball node bolts are tightened one by one.
Selection of hoisting scheme Adopts 4 machine hoisting operations for hoisting.
When arranging cranes during crane construction, it is necessary to consider the working performance of each crane and the requirements for the displacement of the space frame in the air. The hoisting speed of each crane should be measured before hoisting so that it can be grasped during hoisting. When the lifting capacity of the four cranes can meet the requirements, it is advisable to arrange the four cranes on both sides of the space frame, so that only four cranes can hold the space frame. After being lifted vertically through the top of the column, it can be rotated at a certain angle to complete the air-shifting requirements of the space frame.
Selection of hanging points
The arrangement of the lifting points should try to make the force of the space framework frame hoisting and the force of the space framework frame working state basically the same. The selection of the weight, area, and lifting point position before the space frame hoisting should be carefully calculated according to the actual situation of the process to ensure the safety of the space frame hoisting. Tie up the hoisting rope, and start hoisting after the inspection. Trial lifting and hoisting of the space frame. Trial hanging of the space frame, after the space frame is 50cm above the ground, check the hanging point ropes and the shape of the space frame, and reconfirm that everything is normal before formal hoisting. Formal hoisting, one-time hoisting in place, and the space frame is located at the ball fulcrum on the top of the column. When the space frame is raised to 300mm higher than the top of the column, it is shifted in the air, and when the center of the space frame is aligned with the center of the support of the space frame, four cranes drop the hooks at the same time, and the space frame is dropped to the top of the column.
