Special construction scheme of a hospital project (formwork Scaffolding , safety)
1、 Formwork design scheme (attached with high formwork calculation sheet): 1. The column formwork panel is 18mm thick bamboo plywood, and the back edge is 600mm × 100mm, and the spacing between wooden edges is not more than 250mm; The column formwork is designed as a mining opening to increase the tightness of formwork joints. When the side length of the column is more than 500 mm, add a Ф 16 split bolt in the middle. The column hoop is made of Ф 48 × 3.5 steel pipe with a spacing of 400 mm; Steel pipes are used to tie and support along the longitudinal and transverse direction of the frame to ensure the overall stability. 2. The bottom adopts two forms of formwork erection, namely hard formwork erection with formwork reinforcement and soft formwork erection without formwork reinforcement. For hard formwork with formwork reinforcement, beam side formwork shall be selected as bottom formwork, and 18 thick bamboo plywood shall be used to make shaped formwork, and wood brace shall be used as vertical stop at beam side. The spacing between the wooden edges of the beam bottom formwork is 300mm, the spacing between the inner edges of the side formwork is 300mm, the spacing between the outer edges is 300mm, the spacing between the outer edges is 600mm, and the wooden edges are 500mm × 100mm Chinese fir. The top is fixed by diagonal bracing. When the beam height is more than 600mm but less than 900mm, add one 12mm split bolt. When the beam height is more than 900mm, add two 12mm split bolts. The spacing of split bolts is 300mm along the beam height and 600mm along the beam length. For soft formwork support without formwork reinforcement, 30mm thick pine board is used for bottom formwork, and 18mm thick wood plywood is used for beam side formwork to make shaped formwork with back edge 2、 Scaffold construction scheme: the construction arrangement of scaffold works is based on the construction organization design of the project. The external scaffold of the project is used for both structural construction and decoration. Therefore, the tower is equipped with double row steel pipe scaffold, which is erected from the ground elevation, and the height is calculated as 26.5m. Masonry frame shall be erected on the internal wall after the completion of frame construction, and two steel pipe scaffold unloading platforms shall be erected in the courtyard for the second and third feeding respectively, with the height of 4.2m and 7.8m respectively The external scaffold of the project is a double row floor scaffold, with the erection height of 26.5m, and the upright tube is a single riser. The erection dimensions are: the longitudinal distance of the pole is 1.60 meters, the transverse distance of the pole is 1.20 meters, and the step distance of the pole is 1.6 meters. The type of steel pipe used is Φ 48 × 3.5. The wall connecting rod adopts three steps and three spans, with vertical spacing of 4.80 meters and horizontal spacing of 4.8 meters. The construction uniform load is 3.0KN/m2, and two layers are constructed at the same time, and a total of four layers of scaffold boards are laid. 1、 Calculation of cross bar: strength and deflection of small cross bar shall be calculated according to simply supported beam, and the small cross bar shall be above the large cross bar. Calculate the maximum bending moment and deformation of the small crossbar according to the scaffold board and live load on the small crossbar as the uniform load
