Study On Stability Of Overweight And Large Deep Beam High Support Formwork

With the continuous improvement of the theoretical and technical level of the construction industry,the construction of large-scale engineering projects such as high-rise and super high-rise buildings has become more and more popular.Therefore,the application of the tall formwork support system is extremely frequent,and its formwork support structure is the safest in large-scale engineering projects.However,the high-span system has its own shortcomings.The construction is complicated,the factors affected by the environment are many,and the damage caused by accidents is extremely great.Therefore,the high-module,especially the overweight super-large beam,is still a heavy difficult research at this stage.Based on the research background of the frequent occurrence of high-profile template support system,this paper takes the stability of the tall template support system of a circular coal storage bin in Huainan area as the research object.The indoor experiment,ANSYS numerical simulation and structural calculation were used to analyze and calculate the bearing capacity of the foundation,the stability of the supporting structure at the door cavity,and the stability of the upper ring beam high formwork support system.Finally,the BIM technology was used to store the coal storage bin.Modeled separately from the tall formwork support system for collision check analysis.The experimental results show that the optimum moisture content of the foundation soil layer is 19.3%,the corresponding maximum dry density is 1.77g/cm3,the minimum value of unconfined compressive strength is 134.89kPa,and the maximum value is 281.49 kPa.The average value is 199.51 kPa.In the design of the supporting structure at the door of the circular coal storage bin,a four-row steel column with a column size of 500mm ×500mm,a longitudinal column spacing of 1.5m and a lateral column spacing of 3m is used as the supporting structure,and ANSYS finite element software is used.The structural analysis shows that the maximum deformation of the structure is 0.778×10-1mm,and the maximum stresses in the three directions of x,y and z are:2.55MPa,1.93MPa and 4.98MPa,and the structure is stable and reliable.In the design of the upper ring beam formwork support frame,a fastener-type steel pipe scaffolding system with a longitudinal and lateral spacing of 600 mm and a step distance of 1200 mm is adopted,and the main components and foundation bearing capacity of the panel,main beam and pole are checked.To determine the stability of the designed template support system.Finally,combined with BIM technology,the building model and the high-support model system are visually displayed,then the collision detection and simulation construction are run to avoid engineering problems such as lost work rework and other engineering problems that may occur during construction.Figure[50]table[19]reference[63]...