The Testing Research On The Structure Design And Construction Technology Of GFRP-CRCP

GFRP-CRCP is a continuously reinforced concrete pavement that the GFRP tendons as a reinforced layer instead of steel. In view of heavy-duty, severe overloading, rich resources of cement and lack of asphalt resources status, research and application of GFRP-CRCP has a very good value.In this paper, based on the test road of CenRong first class highway (WuZhou Section) of NO.324 national highway, combined with existing research at home and abroad, performance tests of GFRP tendons in self-designed test methods, shows that the GFRP tendons is high strength, low modulus materials. The GFRP-CRCP structural finite element model of the temperature is built by space isoparametric element finite method, in which the GFRP tendons layer treated with continuous modeled in entity unit, and the use of space orthotropic layer instead of reinforced material model. From the whole model, the panel features of continuous reinforcement has been concentrated in the thickness of GFRP tendons that the scope of the area will be assessed longitudinal GFRP tendons in the framework of the formation of thin-layer width. Calculation of GFRP-CRCP temperature warpage stress, analysis of cracks in horizontal spacing, reinforcement ratio, pavement thickness, modulus and other structural parameters of GFRP-CRCP temperature stress, its influence laws is similar to ordinary CRCP. The GFRP-CRCP design of the reinforcement, thickness design methods, terminal treatments methods are proposed based on the original design specifications. Combination of entitative engineering, GFRP-CRCP 's construction technology is concluded, and the formation reasons of cracks in the test road have been observed and analyzed. Finally, this paper given an evaluation of economic performance on the GFRP-CRCP that GFRP-CRCP has a higher economy from the long-term interests, which provides a theoretical basis and practical experience for the GFRP-CRCP promotion on expressway in China.