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为了评价露石混凝土对桥面铺装结构稳定性的改善,利用复合试件直接剪切试验和拉拔试验,研究了露石表面、刻槽表面、凿毛表面和原状表面的抗剪强度随正压力的变化情况,以及防水层存在对各纹理表面抗剪强度的影响。结果表明:不同正压力作用下,露石表面的抗剪强度及随正压力增大速率都明显高于其他表面形式;防水层对层间过渡区的抗剪强度贡献取决于桥面,表面纹理丰富和粗糙,内摩阻角大,则防水层的粘结贡献就小;露石表面抗剪强度主要由其表面丰富的纹理形成的摩阻力提供,所以露石表面的抗剪强度受防水层影响较小,因此使用露石桥面板能够明显提高桥面铺装的结构稳定性。
In order to evaluate the improvement of dewed concrete on the stability of bridge deck pavement, the shearing strength of dewstone surface, notch surface, chipped surface and undisturbed surface were studied by direct shearing test and drawing test of composite specimen The changes of positive pressure and the influence of waterproof layer on the shear strength of each textured surface. The results show that under different positive pressures, the shear strength and the rate of positive pressure increase are obviously higher than those of other surface forms. The contribution of the waterproof layer to the shear strength of interlayer transition zone depends on the decks, the surface texture Rich and rough, large internal friction angle, the contribution of the waterproof layer bonding contribution is small; exposed stone surface shear strength is mainly provided by the surface of the rich texture of the frictional resistance provided, so the exposed surface of the stone exposed by the waterproof layer Less impact, so the use of exposed stone bridge deck can significantly improve the structural stability of the deck pavement.