Rapid Bridge Deck Replacement Construction Techniques

Abstract

Rapid bridge deck replacement (RBDR) is the method of replacing a bridge deck using innovative, alternative deck systems to perform needed repair under an accelerated construction schedule. Through employing RBDR techniques, state highway agencies (SHAs) can meet current transportation challenges by repairing the nation's bridges while minimizing construction-related impacts. SHAs in the United States were surveyed on their experience with RBDR projects. Survey results are divided into the following categories: decision-making factors, construction schedules, construction techniques, contractual methods, costs, and innovations in safety or technology employed. Of the 52 responding agencies, 24 have experience with RBDR; 54% have less than 5 years of experience, and 63% have completed fewer than five RBDR projects, suggesting that the practice is new and most agencies are inexperienced. The strongest factors influencing decision making are traffic volume, critical bridge, safety, and impact on local business. Most RBDR projects are performed on highways and freeways, in both urban and rural areas. Lane closures are the most common closure scenario, which allows construction to proceed while maintaining partial throughput capacity. Most agencies use nighttime closures, which reduces road user impact and provides a safer environment. Although 86% of the responding agencies experienced an increase in construction costs, 68% agreed that RBDR projects are perceived as a cost-saving mechanism for road users. Information collected from this survey, along with lessons learned and safety and construction technologies employed, allow knowledge to be transferred to practitioners who may have little or no experience with RBDR techniques.