港珠澳大桥沉管隧道沥青路面结构设计与实施

沉管隧道预制管段拼装结构易引发路面反射裂缝，海底隧道封闭、潮湿的施工环境条件易导致基面潮湿、施工困难、路面湿滑等问题。为解决上述技术难题，通过对路面使用环境气候、交通等条件的综合分析，借鉴类似工程实践经验，提出3 cm温拌改性沥青AC10铺装调平层+6 cm温拌改性沥青SMA16铺装下层+4 cm温拌阻燃改性沥青SMA13铺装上层的铺装方案，并制定沉管隧道管节接头、节段接头及路缘等区域的细化处治方案。从隧道路面设计验算及实施检测结果来看，沉管隧道路面结构设计方案与细部方案是科学、合理、可行的，可以为今后类似工程建设提供借鉴。

Structure Design and Application of Asphalt Pavement to Hong Kong Zhuhai Macao Bridge Immersed Tunnel

The assembled structure of precast tube section of immersed tunnel is easy to cause reflection cracks on the pavement, and the closed and humid construction environment conditions of subsea tunnel can easily lead to damp base surface, construction difficulties and wet pavement. Hence, based on the comprehensive analysis of the climate of pavement environment, traffic and other conditions, and as well the practical experience of similar projects, the paving scheme of 3 cm warm mix modified asphalt AC10 paving leveling layer + 6 cm warm mix modified asphalt SMA16 paving lower layer + 4 cm warm mix modified asphalt with flame retardant SMA13 paving upper layer is proposed, and detailed treatment schemes for tube joints, section joints and curb of immersed tunnel are made. The checking calculation results of tunnel pavement design and the test of implementation show that the pavement structure design scheme and detailed scheme of immersed tunnel are scientific, rational and feasible, which can provide reference for similar projects in the future.