Proof Testing of a Structural Plate Pipe with Varying Bedding and Backfill Parameters: Section 1, Volume 2. Summary, Conclusions and Recommendations for Implementation

摘要

A 120-in. (3.05-m), 12-gauge, steel, structural plate pipe, embedded in an embankment under 188 ft (57-m) of overfill, was heavily instrumented and tested for structural behavior under the imposed earth loads. Eight separate zones employed varying conditions of bedding and backfilling, including shaped and unshaped bedding, entrenchment and positive projection (p=1), Method A and Method B (polyurethane overlayment) backfill, and varying degrees of compaction. This section of the report compares observed results with those of other researchers, including discussions of settlement ratio, observed distress, costs, comparisons with observations of Watkins' test cell (Utah State University), and comparisons with laboratory seam failure criteria.