Repair of the foundation bolt after the compression nut is broken: pre-form the compression sleeve, the size is D=2d, H=0.8d, where d is the diameter of the foundation bolt, the material is the same as the foundation bolt, generally medium, Low-carbon steel. Place the compression sleeve on the section of the bolt that is pulled off and weld by surfacing. During surfacing, the first layer of surfacing must be welded to the foundation bolts. No defects such as incomplete penetration and slag inclusion are allowed. Each layer of surfacing must be treated with slag removal. This method does not require the equipment to be lifted off the cement foundation, which is simple and convenient. Repair after the foundation bolt is broken: first cut off the upper foundation bolt, lift the equipment off the foundation, and use the wind to cut the concrete deep (below the base bolt fracture) 200-300mm. Then cut off some of the foundation bolts. According to the total length of the base bolt, the extension bolt and the rib are made, and the end of the extension bolt without the thread is chamfered. First, the length bolts are welded to the lower foundation bolts, and the groove is welded, and then the four reinforcing bars are welded, and then the high-grade concrete is poured. In addition, when repairing the broken base bolt with a diameter of less than 24mm, the joint bolt should be made first, then the broken basic bolt should be threaded out by the die, then the socket bolt should be screwed on, tightened, and finally poured. Concrete.
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