ABSTRACT
Urban express corridor in China are characterised by intensive traffic loads, extreme climatic conditions, short allowable construction time and therefore high difficulty of construction and maintenance. By mechanical analysis, the essential requirements on pavement structure of bridges and tunnels on urban expressway were identified. Typical pavement structures and materials were optimised regarding the special operational and construction conditions. Warm mix and flame retardant asphalt for city tunnel were introduced. A coloured anti-skid and warning topping was developed for the pavement at the inlet and outlet of tunnel in order to alleviate the high safety risk in that section. Typical solutions for steel bridge deck were compared. Cold mix resin asphalt and SMA pavement structures were suggested for use on urban viaduct. Some practical application of the introduced structures on a viaduct project proved the feasibility of the studied structures. Long-term performances need to be observed.
