Principle and technical development of jacking reverse construction for prefabricated building structures
The jacking reverse construction is a new construction process that integrates different characteristics of the jacking and the reverse construction,which constructs and jacks the building storey by storey near the ground.Through the principle analysis of each jacking stage,the key technologies such as the selection of the jacking point were studied in combination with the characteristics of the strong time-dependent structure.The mechanical mechanism of the structure under asynchronous vertical jacking displacement conditions was analyzed,thus the force characteristics of the jacking reverse construction for prefabricated building structures was clarified.The existing related supporting construction technologies were sorted out,then the current technical problems of the jacking reverse construction for prefabricated building structures were pointed out.For the strong time-dependent characteristics of this new construction process,the development trend of combining digital twin and artificial intelligence technology to achieve intelligent control was proposed.A comprehensive objective function for carbon reduction optimization was established,and was proved that reasonable jacking schemes will reduce the internal forces of components during the construction phase through an example.The results show that,based on the principle of jacking reverse construction for prefabricated building structures,mechanized construction is adopted to replace manual operation and heavy lifting is adopted to replace high-altitude lifting,so as to reduce the inter storey transfer of equipment and vertical transportation of materials.The construction efficiency can be improved and the process flow will be controlled within the effective height range near the ground at the same time,which is expected to reduce environmental impact and carbon emissions,improve the resource utilization feasibility of the building structure at the end of its service in the future and promote the green and low-carbon development of the construction industry.
green constructionjacking reverse constructiontime-dependent analysisprefabri-cated building structure
NETL
NSTL
万方数据
维普
