In combination with steel box girder construction by incremental launching method, the paper introduced the construction technique of variable depth curved steel continuous box girder.
结合钢箱梁顶推实例，介绍了变高度曲线连续钢梁顶推施工技术，总结了该施工方法的经验，对类似桥梁的施工有参考价值。
But the structure commonly used in overpasses, continuous box-girder, often in construction or traffic soon cracked, directly affecting the safety and durability.
但是立交桥中常用的结构之一连续箱梁经常在施工中或通车不久就出现裂缝，直接影响桥梁的安全性与耐久性。
Prestressed concrete continuous box girder and steel-concrete composite girder are more and more adopted in construction of highway and railway.
预应力混凝土连续箱梁与钢混结合梁在公路、铁路工程中的应用越来越普及。
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