Abstract

A new bridge system, called the GRS integral bridge, is proposed. This consists of an integral bridge, which integrates a pair of RC abutment and a continuous girder without using girder supports, and a pair of geosynthetic-reinforced soil (GRS) retaining walls having full-height rigid (FHR) facings constructed after the completion of reinforced backfill walls. A pair of FHR facing function as the abutments to which a girder is integrated. Results from model tests indicate that, when reinforcement layers are firmly connected to the FHR facing, GRS integral bridges become much more cost-effective in construction, long-term maintenance and stability than conventional type bridges, integral bridges with unreinforced backfill and bridges using GRS retaining walls as abutments.

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