The Application Of Micro Surfacing Technology On The Structure And Material Of Tunnel Pavement

As various aspects reason, the study of the tunnel pavement structure and the material is weak in China. Mostly, there are cement concrete pavement in tunnel, and the design mechanically applies outside tunnel pavement or the urban road design standard. The constructed cement concrete pavement in tunnel appeared damages, such as, flaking, the joint destroys, the smoothness lowly, the big noise and so on. Moreover, the surface is agglomerating greasy matter, and the access appears different frictional coefficient which affected the tunnel pavement performance.Based on the investigation of tunnel pavement working conditions, the paper summarized the special pavement request in tunnel, proposed a new pavement structure, which is micro-surfacing paved on cement concrete pavement. And the new pavement structure has much superiority, but some problems. The paper produced lean concrete base and cement concrete surface design method in tunnel, including the design parameter, computation of stress as well as the design basis, and suggested long the cement concrete slab transverse joint spacing. Profiting from the SMA theory thought, through the massive experiments, it proposed the method, which is fiber and rubber powder improve micro-surfacing mixture performance. Moreover, it emphasized the draining design in tunnel.Finally, the kind of new pavement structure may promote our country micro-surfacing technology progress, and make up the research on the pavement of structure and material in tunnel. In the certain degree, it provides the technical support for the standard improvement.