SPRAYED CONCRETE LINED TUNNELS 2ED (HB 2020) Hardcover

Sprayed Concrete Lined (SCL) tunnels are becoming increasingly popular due to their flexibility. The SCL method has revolutionized the design and construction of both hard rock and soft ground tunnels, and the use of permanent sprayed concrete linings has unlocked the method's full potential for reducing construction costs and time. However, the complex behavior of sprayed concrete at early ages makes design challenging and necessitates a strong management system during construction. As a result, the benefits of the method must be weighed against the risks, as evidenced by several high-profile tunnel collapses. This book serves as an excellent introduction for engineers working on site, in design offices, or in client organizations. It covers all aspects of SCL tunneling, from the composition of sprayed concrete to detailed design and construction management. Although there is a strong interdependence between all aspects of sprayed concrete, few engineers possess the necessary expertise across the entire field. This knowledge must be shared with the broader engineering community as SCL tunnels become increasingly essential in modern urban infrastructure. In the second edition, updates reflect recent advancements, with expanded sections on permanent sprayed concrete, spray-applied waterproofing membranes, fibre reinforcement (both steel and macrosynthetic), and composite lining design. A new section also addresses sustainability and environmental impact.