Top-flush telescopic assembly joint and method for thermal power plant pipeline steel support

The invention belongs to the technical field of industrial building structures, and provides a top-flush telescopic assembly joint and method for a thermal power plant pipeline steel support, and the joint of a joint main plate and a connecting plate is provided with a redundant space in the horizontal direction; a redundant space in the horizontal direction is formed at the joint of the steel pipe chord member and the node steel sleeve; the top of the node main board is flush with the top of the H-shaped steel, and the whole node has a certain telescopic freedom degree through redundant spaces on the two sides. According to the joint form, the top of the joint is flush and free of protrusions, the long round hole can release temperature deformation, the telescopic joint avoids arrangement of an expansion joint, the joint can be welded and machined in a factory, bolts are directly adopted for installation on site, the assembly degree is high, and construction is convenient. 本发明属于工业建筑结构技术领域，本发明提供了一种用于火电厂管道钢支架中