Experimental Research on Sliding Layer of Cross-Tensioned Prestressed Concrete Pavement

Abstract

Sliding layer is an important component of cross-tensioned prestressed concrete pavement, friction coefficient of slab bottom is decreased by setting sliding layer, so as to reduce the frictional stress at the bottom of the plate and increase the length of the plate. In order to analyze the effect of “sand + polyethylene film†type sliding layer on friction coefficient, and also recommend the optimal sliding layer parameters, The effect of fineness modulus of sand, thickness of sliding layer and specification of polyethylene film on sliding friction coefficient was discussed through orthogonal test. At the same time, The significance level of sliding layer parameters was assessed on the basis of range analysis. The laboratory test results show that the sliding effect of medium sand is better than that of fine sand and coarse sand, and, the friction coefficient reaches the minimum value with sand layer thickness of 10mm, polyethylene film thickness of 30µm , The significance level of sliding layer parameters ranks as follows: fineness modulus of sand > sand thickness > polyethylene film specification, the test results can be provided for calculating reference for friction stress of the cross-tensioned prestressed concrete pavement.