High-rise steel structures are mainly used in modern high-rise buildings. The structural system of steel structures mainly includes frame system, frame support (shear wall panel) system, cylinder system and mega frame system. For the high-rise steel structure, the structural design is also the key factor of the construction success or failure, the participation of the structural engineer in the project stage is necessary.
1, hoisting work on steel components. Steel structure engineering components in place, the proofreading installation baseline, precise positioning.
2, After positioning the steel structure parts. The weight of the components on the connection point of the force control at 80%. The control method uses the vertical displacement of tower cranes according to the calculation table to control. Adjust with level and theodolite readings.
3, the basic components of steel connections. Bolt or welding more points. According to program requirements for homework.
4, the installation of steel components to adjust the accuracy of control. When using theodolite to measure the verticality of the column, pay attention to the influence of sunlight on the lateral expansion and contraction of the column.
5, steel parts in place, the weight of the components on the connection point of the force control at 80%. Tower crane should be calculated according to the value of the tower crane horizontal displacement to the end of the boom to move a distance. To ensure that the tower crane lifting wire and column in a vertical line.
6, steel parts in place, the test after the bolt fastening or welding work.
7, the lifting of steel beams can be used to hang points or 4 lifting points arrangement. Note 4 lifting points Double balance pulley with two ropes. Lifting point Bundling points hanging point and the immediate hanging point to wear around the direction to be positive or negative. Make sure the girders are always in balance. Do a good job of cutting edges and corners to prevent protection. The tube can be divided into two treatments. Pad in the corner.
8, when the layer is completed for local acceptance. Unqualified must be rectified until qualified.
9, ready for the next installation project