Technical And Economic Comparison And Construction Risk Evaluation Of Super-high And Over-weight Formwork

With the continuous enrichment and development of the use of functional requirements,buildings continue to bring forth the new,the structure is becoming more and more complex,local new,high,heavy and long span buildings continue to emerge,ultra-high overweight formwork support system in the construction of concrete structures from time to time.Although a special construction plan needs to be prepared in the process of formwork construction,especially for a certain scale of high mold support needs to be demonstrated by experts,but in the actual construction process of high mold support,safety accidents still occur every year in the country.Therefore,it is necessary to carry out the research of construction calculation and safety risk assessment for the high support mold,especially for the super-high support mold.Firstly,based on the different construction technical specifications of high-supported die,the paper makes a comparison of construction technology and economy of jiangxi culture center high-supported die frame project.On the basis of this research and analysis,the BP neural network method is used to evaluate the risk of the project construction.This paper mainly studies from the following aspects:Firstly,a comparative analysis is made of the existing technical specifications for the safety of building construction formwork(JGJ162-2008),engineering construction specifications for concrete structures(GB50666-2011),and technical specifications for the safety of steel tubular scaffolding for construction fasteners(JGJ130-2011),and the differences in the calculation of the bearing capacity of the vertical pole and foundation under three different specifications are summarized.Thirdly,on the basis of the comparison and analysis of the bearing capacity differences under different specifications,the technical and economic comparison is carried out in combination with the project of jiangxi cultural center.According to the calculation results of three different codes,it is shown that,compared with the other two codes,the technical code for safety of steel tubular scaffolding with fasteners in construction(JGJ130-2011)has a more reasonable technical and economic evaluation effect.Finally,on the basis of "safety technical specification for steel tubular scaffolding with fasteners in construction"(JGJ130-2011)and in combination with the construction site data of the formwork support frame of jiangxi cultural center project,the required risk assessment index is obtained through comprehensive analysis,and the risk assessment model of high formwork support is constructed by using BP artificial neural network method.The sampledata were input into the risk evaluation model to obtain the result of risk index evaluation and prediction.The analysis and comparison of the data predicted by the model and the actual data show that the high-supported mold construction project conforms to the safety risk assessment requirements of JGJ130.This paper compares the technical and economic effects of the super-high and super-heavy formwork frame under three different specifications and compares the risk assessment of the actual project with the BP neural network method,which provides guidance and reference for the application research of the technical specification of the high-supported formwork project and the risk prediction in the actual construction.