510results about How to "Construction quality is easy to control" patented technology

The cradle for in-situ cast bridge construction includes one bailey truss girder, four cross beams, hanging strips, anchoring ribs embedded in the formed girder, traveling tracks, round bars and balance weights connected together.

The invention discloses a quick-mounting type concrete stair and a mounting method of the quick-mounting type concrete stair. The quick-mounting type concrete stair comprises a prefabricated flight, a cast-in-place upper layer stair platform, a cast-in-place lower layer stair platform, a cast-in-place upper layer stair beam and a cast-in-place lower layer stair beam, wherein at least two flight pre-buried elements are respectively pre-buried on the vertical surfaces of the connecting ends of the prefabricated flight, the cast-in-place upper layer stair platform and the cast-in-place lower layer stair platform, the flight pre-buried elements are buried in the vertical surfaces on the two ends of the prefabricated flight, a lifting element is pre-buried on the prefabricated flight, L-shaped lapping openings lapped with the prefabricated flight are preserved on the upper corners of the cast-in-place upper layer stair beam and the cast-in-place lower layer stair beam, at least two stair beam pre-buried elements are pre-buried on an upper table top close to the lapping openings, the positions of the stair beam pre-buried elements and the flight pre-buried elements are one-to-one correspondent to each other, and the flight pre-buried elements and the stair beam pre-buried elements are welded and fixed by angle iron. With the adoption of the quick-mounting type concrete stair disclosed by the invention, the technical defects of complex construction technique of firstly binding reinforcing steel bars and pouring concrete and long time of the concrete stair, and the necessity of prefabricating of all flights, platform plates and stair beams in the traditional concrete prefabricated stair are overcome.