A satellite receiving antenna is set up on the seventh floor of a comprehensive building. The foundation and the floor are slab-concrete and connected with a20 pre-embedded anchor bolts. The installation instructions provided by the manufacturer at the plane position anchor bolt analysis are quite high in accuracy, and only allow the C block to have an error of 1 mm. On-site construction stakeout should be carried out on the steel mesh, the construction surface is unstable, and it is difficult to meet the accuracy requirements due to factors such as wind, sight line and steel plate processing. In this project, the 1B1 amplification method was adopted to solve a series of problems, and the specific operation is as follows. First, the fine stakeout (template stakeout) First, on a flat ground, roughly lay out the plane position of the anchor bolts, and then place a large amount of flat planks on the position of each embedded part, the size of the board should not be too Big, not too small. Too big to hinder the shock of the cockroach, too small to be easily cracked and deformed. Finally, the wooden boards are spliced ​​into a solid one. Second, the precise stakeout on the plane of the board, using the calibration ruler to accurately stake out each hole of the four pre-embedded bolts. This process is carried out on the ground and is convenient to operate. If the equipment has already entered the site, it can also be simulated on site, and then the steel plate is fixed on the wooden board together with the bolts. Finally, the steel plate and the floor slab mesh are spot welded and fixed, and the steel plates are spot welded with short steel bars to form a stable overall space. At this time, there is no need to worry about displacement, deformation, etc. due to vibration, collision, etc. during cast-in-place. The difficulties that must be overcome in the on-site construction were eliminated, and the on-site installation was successful. This method can be used not only for the stakeout of pre-buried anchor bolts, but also for the lofting of other equipment foundations. The specific operation is subject to common consideration. Wave Spring,Spring Waveform Washer,Overlapping Waveform Spring,Small Waveform Spring Dongguan Jiufukai Hardware Products Co., Ltd , https://www.jfkspring.com