改进组合型微型钢管桩在高速公路灾害处冶设计中的应用

高速公路作为国家或区域内的干线快速通道，是区域物资、人员转移的主要运输通道，保畅通行至关重要，道路病害的处治通常要求做到快速高效，永临结合，最大限度降低对交通的影响。十堰至天水国家高速公路甘肃段徽县（大石碑）至天水公路横岭山段出现路基滑塌后，为快速修复滑塌路段，保畅通行，将多用于临时加固工程的微型钢管桩改良后与永久支护工程相结合，取得了临时保通与耐久畅通的双重功效。

Analysis on Application of Steel Capping Beam in Municipal Elevated Bridge

With the development of economy and society, the environmental protection requirements in the construction of urban bridge are getting higher and higher. The traditional construction method of substructure is cast in situ, which occupies the large site with the noise and serious dust pollution. In recent years, the construction of fabricated substructure is developed rapidly, but there are still many shortcomings. Combined with the engineering practices, the steel capping beam is considered to use. Through the parametric study on steel capping beam and the contrastive analysis on the conventional concrete capping beam, the characters of steel capping beam are quested in order to provide the reference for the follow-up engineering design.