“桥管结合”与简支大跨径三肢钢管格构式组合梁设计

从有压管道工程中跨越障碍的结构──管路桥的实际出发，提出了“桥管结合”的概念．并根据简支大跨径三肢钢管格构式组合梁的设计和运行情况，论述运用“桥管结合”概念设计桥跨结构，能够使其达到节省材料、减轻自重和提高跨越能力的效果。

A Discussion about the Path to increase core-competitiveness of Chinese Railway and Bridge Enterprise ——In the case of China Railway Jiujiang Bridge Engineering Co.Ld

This paper summarized the three things included in concept of core-competitiveness： integrative ability, core technology and core product. It reviewed main factors for increasing core-competitiveness, which include core technology, resource integration, information exchange and strategic alliance establishment. It studied the wildly used indicators in core-competitiveness assessment model, such as financial status, business management, technology innovation and enterprise culture. Through case study in China Railway Jiujiang Bridge Engineering Co.Ld, the writer got the conclusion that Chinese Railway and Bridge enterprises should focus on industrial integration and innovation to enhance core-competitiveness.