渡槽箱梁预应力孔道摩阻试验研究

Study on Bridged Gutter Test of Friction Loss of Prestress

某渡槽工程中,箱梁采用后张法预应力体系,为验证孔道摩阻设计数据,积累施工资料,正确控制施工过程的张拉力,确保渡槽施工质量,进行现场孔道摩阻试验,测试孔道摩阻系数μ及偏差系数k,并与相关规范规定值进行了比较和分析.

In a certain bridged gutter engineering, the box beam adopted a post-tension prestressing system. To verify the design data of the friction loss of prestress, to accumulate construction information, to control the stretching force accurately and to insure the construction quality of the bridged gutter, a field conduit friction test was made. We gained the coefficient of conduit friction μ and the coefficient of deviation k, and compared them with the specified values in correlative specifications.