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Development of deflection prediction model of concrete block pavement considering block shape and construction mode

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Document pages: 9 pages

Abstract: Concrete block pavement (CBP) is different from typical concrete or asphalt pavement. It is constructed by using independent blocks with unique structural patterns to form a discrete surface layer to bear traffic loads. The surface structure of CBP varies with the block shape and construction mode, so it is difficult to determine the surface structure strength by using the general equivalent elastic modulus estimation method. Through finite element analysis and dynamic load test, a CBP deflection prediction model considering block shape and construction mode is established. According to the analysis results, it is found that the block shape has little influence on the load distribution, while the construction mode has a great influence on the load distribution. The deflection prediction model is applied to practical engineering rutting model for CBP proposed by Sun, the herringbone bond pattern showed the best performance comparing with stretcher bond or basket weave bond pattern. As the load repetition increased to 1.2 million, the rutting depth of CBP constructed by herringbone bond pattern was 2 mm smaller than those constructed by the other two patterns.

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