《Table 1Ten SCFLs with a BIT combination.》

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《桥岛隧组合跨海通道的最新建设技术》

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Although these eight BIT combination projects include only two suspension bridges，major contributions have been made to bridge construction technology by the development of sea-crossing suspension bridges with long spans.The western section of the San Francisco–Oakland Bay Bridge contains two single main-span suspension bridge units with 701 m spans—the second longest at that time.These units were built and then connected by means of a central shared anchor block，as shown in Fig.2（a），which was an excellent method at that time of maintaining the balance in terms of mechanics while reducing the costs[4].Further progress in suspension bridges led to the development of a multiple main-span suspension bridge，which is a suspension bridge with two side spans，several main spans，and only two anchors on both ends；there is no additional anchor anywhere，as shown in Fig.2（b）[9].The other contribution of suspension bridge technology is the creation of a new world record in span length:The box girder suspension bridge in the Great Belt Fixed Link is 1624 m in length，and is further characterized by wind-resistance technology for flutter and VIV control with corner deflectors[10].