Study On Composite Permanent Template And Its Application In Bridge

Formwork is the essential working tools in casting concrete. Casting concrete members need the formworks either in situ or in factories. Formworks should possess good performances, convenience in construction, and low cost. However, formworks are not very economic because of need more manual works and wastes more material in present.With the development of construction materials, more and more high-strength materials with low price used widely and substituted to the traditional construction material. The total cost of project reduced. Meanwhile, the technology of the permanent form begins to replace the traditional casting mold. The permanent form compared with traditional forms is a kind of new type structure form which will stay with the structures permanently and plays a role in bearing load or keeping warm, insulating against heat etc.Composite material can solve the key questions of structural durability. It develop from the ornament materials toward structure bearing component material gradually. In most cases, composite material has been used mainly as thermal insulation slab and wall board.This paper focuses on the composite material used in permanent form and applied to continuous rigid frame bridges. The enhanced function, construction efficiency and economic of PVA forms used in continuous rigid frame bridge are discussed.â‘ Discuss the influence factor of connection between composite permanent form and concrete, and investigate the composite permanent casting mold acting on the whole structure performance. The flexural strength of beam is increased by using the composite permanent form.â‘¡Discuss the design of composite permanent form, and the difference between the steel form and the composite form in expenses, efficiency function.â‘¢Discuss the installation measures of supported system used in composite permanent form, and the relevant technological questions in construction.