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根据我国的桥涵规范,墩台基础的αh≤2.5时,可将其看作是刚性基础那样受力,其中α为基础的变形系数,h 为基础的埋设深度。这一假定适用于基础顶部及底端皆无约束且按温克尔介质上弹性基础与刚性基础的理论所算得的侧向位移之差为10～15%的情况。事实上,基底的约束条件对刚性基础的侧向位移有很显著的影响。本文对基底嵌入岩石内墩台基础的刚性受力状态进行了分析与探讨。
According to the norms of bridge and culvert in China, when αh≤2.5 of abutment foundation, it can be regarded as a rigid foundation, where α is the deformation coefficient based on and h is the depth of embedment. This assumption applies to cases where the difference between the lateral displacements calculated on the basis of the elastic foundation and the rigid foundation of the Winkler medium is 10 to 15% for both the top and the bottom of the foundation is unconstrained. In fact, the substrate constraints have a significant effect on the lateral displacement of the rigid foundation. This paper analyzes and discusses the rigid stress state of abutment embedded in the rock.