Chapter 1 - Introduction to Modern Accelerated Bridge Construction

Abstract

With the advent of high-capacity machinery, new materials, and new management methods, we are now able to manufacture bridge assemblies and lift them in position. There is a year-round need for infrastructure improvements and maintenance in the form of rapid replacement and rehabilitation of many thousands of bridges. Although most of us have heard the expression accelerated bridge construction (ABC), few of us know the intricate details. In this book, an attempt is made to bring up to date the latest knowledge of the multibillion dollar construction industry. The topics in this introduction cover the need for ABC, differences in conventional methods, the state of the art, the scope of work, and the many advantages and existing constraints in achieving rapid delivery. Funding limitations, review of progress in other structural disciplines, notable ABC projects being built in several US states, recommendations, and the need for a code of practice for accelerated construction are addressed. Applying the ABC methodology will result in 50% greater number of completed bridges each year. It will help the economy by reducing wasted hours due to traffic jams during construction, helping commuters to work, and also benefiting commerce by increasing faster delivery of goods.