Technology Research Of The Hollow Slab Disposable By Paper Template

In order to save raw materials and to alleviate the constant load, most of the bridge superstructure using the form of a hollow section in the bridge engineering.The hollow plate girder is commonly used as a form.The main templates such as wooden mold, rubber balloon and steel mold are used in conjunction with the construction.Use of templates and material characteristics are different,and the advantages and disadvantages of templates are different,too.With the diversification of the bridge structure in recent years,some unconventional curved bridges and variable cross-section profiled cross-section bridges appear in the bridges and high-grade highways in some cities.For this type of bridge, the template is difficult to remove, even if taken out repeated utilization is also very low.Therefore, traditional template in a waste of resources at the same time, increase the cost of the project.Paper core mold is a new practical template structure, and it is formed by waste treatment processing, has a certain stiffness and strength.Because of its lighter weight, when it wrapped in a sheet-type bridge internal dead load of the bridge would not cause much impact.The paper core mold material has tested in the issue.The force conditions have been analysis on the experimental basis.Then establish mechanical model through the midas civil finite element analysis software and comparison with laboratory test results. The paper core mold’s deformation and internal forces have been put forward.And paper core mold thickness and construction pad pitch relationship is developed.The result provides a theoretical basis for determining the parameters for the actual project.