Abstract: On the basis of analyzing "elastic anti一bending reflection一models”for
calculating the horizontal bends of buried pipelines，the article puts forward
a kind of calculating model that conforms more with the forced and deformed
characters of the pipelines, and gives the general solution to the problem by
determining the circular arches with combined axial and lateral loads on the
elastic foundation.Examples are given at the end of the paper to show the
influence of the horizontal elbow radius and angle on the pipeline internal
forces and displacements,

Key words: Buried pipeline Horizontal elbow Circular arch