Abstract: Arch elements (S) of an overfilled load support structure (L) suitable for use in highway construction are associated with a foundation (F) by a hinge (10). The hinge is formed by edges (12,14) of the arch element bearing on a horizontally disposed load bearing surface (22) and a vertically disposed load bearing surface (24). Essentially unrestrained rotation about the edge bearing on the horizontally disposed surface is permitted, and translation of the element is primarily restrained by the edge bearing against the vertically disposed load bearing surface. The rest of the element is spaced from the foundation.

Abstract: An end element (10) retains earth overfill (E) associated to an overfilled load support structure (L) which includes an end arch element (S). The end element replaces a spandrel wall (R) and wingwalls (W), and includes a lateral extension (12) located next to the end arch element of the load support structure and which extends far enough so the slope of the fill between an overpass (O) and the toe (22) of the fill located on top of the support structure is low for permitting the overfill located on top of the load support structure to be essentially unrestrained in the horizontal direction. Retaining panels (14) are located adjacent to the lateral extension and cooperate with that lateral extension for retaining the fill.