土石坝心墙沥青混凝土三轴蠕变试验研究

沥青混凝土作为粘弹性材料，在外力作用下将产生很大的蠕变．土石坝沥青混凝土心墙在自重或外力作用下也将产生较大的蠕变，这将直接影响沥青混凝土心墙的受力形式与内应力的大小．基于三轴蠕变试验，对三峡工程茅坪溪土石坝心墙沥青混凝土材料的蠕变特性进行了研究、试验结果表明，用本文的三轴蠕变试验方法进行的试验，可较好的反映心墙工作状态下真实的蠕变状态．另外，用粘弹性的Burgers模型来描述该心墙沥青混凝土材料的蠕变特性，试验曲线和理论曲线能够很好的吻合．

Triaxial Creep Test Study on Asphalt Concrete in the Core-Wall of Earth-Rock Dam

As a kind of viscoelastic material,the asphalt concrete will obtain a very large creep deformation under external loadings.Large creep deformation can also be yielded from gravity or external loadings in asphalt concrete core-wall of the earth-rock dam.Based on the triaxial creep test,the creep properties of the asphalt concrete core-wall which was settled in Maopingxi earth-rock dam of the Three Gorges Project were studied.It is indicated from results that the triaxial creep test in this paper can better describe the real creep states of the oprating core-wall.On the other hand,the viscoelastic model with Burgers model is used to simulate the creep properties of asphalt concrete,the model curves is very suitable to the test curves.