施工设备的市场背景根据我国公路铁路的中长期基础建设规划,2009-2020年期间,我国还需新建高速铁路1.6万km以上,新建高速公路2万km。根据对已有高速铁路设计文件的分析,在客运专线中桥梁比例达到60%以上,未来大型或特大型桥梁的建设则分 Market Background of Construction Equipment According to the medium-to-long-term infrastructure plan of China’s highway railways, during 2009-2020, there will be a need to build more than 16,000 km of new high-speed railways and 20,000 km of new expressways. According to the analysis of the existing high-speed railway design documents, the proportion of bridges in passenger dedicated lines reaches more than 60%. In the future, the construction of large-scale or extra-large bridges will be divided into