| 摘要 |
FIELD: bridge construction, particularly projecting scaffold, which facilitates reinforced concrete bridge span structure member construction or repair. ^ SUBSTANCE: projecting scaffold comprises beams supporting working plates and suspended to load-bearing member by parallel outer and inner posts to create frame structure connected to support beams through bolts. Working plate railing is fastened to cantilever support beam ends. Load-bearing member parallel to carrying beams has orifice to receive mounting bolt to be connected with anchoring nut. The anchoring nut is adapted to be inserted in reinforced concrete bridge span structure beam or in panel thereof during concreting operation. Pivotally connected to outer post are strut carrying form for span structure cantilevered panel or coping block forming and control rod having variable length to change strut inclination angle. The strut has gusset plate pivotally connected to the control rod. Pressing beam is connected to gusset plate from side panel of the form. Pressing beam is higgledy fastened to another gusset plate end or to strut through adjustable control rod to provide one longitudinal edge of side form panel insertion under lower surface of span structure beam or panel thereof. Another longitudinal edge of side panel may be in contact with pressing beam. Bolsters are arranged between strut and lower panel, pressing beam and panel to be pressed with pressing beam, as well as between reinforced concrete beam of span structure or panel thereof and load-bearing member provided with orifice. One bolster is arranged from span structure beam axis side and has rigidity or hardness exceeding that of other bolsters. Method for cantilevered panel or coping block erection with the use of projecting scaffold involves fixing projecting scaffold under reinforced concrete bridge span structure beam or in panel thereof by connecting scaffold with anchoring nuts of anchoring bolts installed therein and passing through load-bearing members having orifices and provided with bolsters, wherein one bolster has rigidity or hardness exceeding that of other bolsters; installing form panels in design position by rotating pressing beam and strut correspondingly; filling the form with concrete mix and stripping the form after concrete hardening. ^ EFFECT: increased efficiency and simplicity of scaffold assemblage, decreased metal consumption, possibility of repeated scaffold usage, increased simplicity of adjustment and manual assemblage, prevention of interference in other operations, including ones to be carried out on bridge roadway. ^ 5 cl, 3 dwg |
