Soil-Structure Interaction of Buried Structures

The analysis, design, and performance of buried structures associated with transportation facilities, such as buried culverts, grade crossings, and soil-structure systems, requires an understanding of soil-structure interaction. Buried structures usually cannot resist the loads to which they are subjected, including soil, without utilizing the strength of the surrounding soil in a complex interaction. The soil-structure interaction of a buried structure is affected by the structure’s material, size, and stiffness; by the method of construction in the field (e.g., trench, embankment, or tunnel); by the type and placement of the backfill material; and by the external loading. TRENDS AFFECTING SUBSURFACE SOIL-STRUCTURE INTERACTION During the past few years, a number of trends have led to changes in the designs for buried structures. In the coming decade, the following trends are expected to result in further changes to buried structures: · Rehabilitation of existing structures will become a more important aspect of work associated with buried structures. · New or improved materials will continue to be developed for structures and fo