2results about How to "Simplify construction procedures" patented technology

This invention belongs to the field of steel structure building technology, and particularly relates to a connection structure for prefabricated steel structure beams and columns with ultra-large cross-sections. The structure includes: an upper connecting column with a lower supporting column at its bottom; both the upper connecting column and the lower supporting column are hollow square steel tubes; a positioning component fixedly disposed at one end inside the upper connecting column; a clamping component fixedly disposed at one end inside the lower supporting column, which cooperates with the positioning component to clamp the positioning component; and a beam-column connection component fixedly disposed at the outer end of the upper connecting column and / or the lower supporting column, with multiple crossbeams detachably connected to the beam-column connection component. This invention can improve the construction efficiency and assembly accuracy of steel structure beams and columns.

The present application relates to a kind of magnesium phosphate beads for emergency repair cement that can melt ice and remove snow, its preparation method and repair method, the beads include PVA water-soluble film and content, content includes by mass fraction: dead-burned magnesia 2-3 parts, ammonium dihydrogen phosphate 1 part, retarder 0.15-0.25 parts, acrylamide 0.3-0.6 parts, ammonium persulfate initiator 0.03-0.06 parts, fine aggregate 3.98-4.41 parts. After stirring and mixing each component, the mixed material is obtained, and the beads are prepared by wrapping with PVA water-soluble film according to different mass fractions. The present application determines the total amount of magnesium phosphate cement concrete required for the repair area and the mass of magnesium phosphate beads and water, places the required magnesium phosphate beads in the position to be repaired, adds water, and the components in the film react to complete the repair. The present application only needs to place a certain amount of magnesium phosphate beads and water at the repair position to achieve repair, simplifies the construction procedure, improves the construction efficiency, and has the function of melting ice and removing snow.