新型钢箱叠合梁在高速公路改扩建工程中关键技术研究

Research on Key Technology of New Steel Box Composite Beam Applying in Highway Reconstruction and Expansion Project

京港澳高速石安段改扩建项目西鸭池分离式立交桥中上部结构采用了技术新颖的新型钢箱叠合梁,大幅度降低了上部结构自重而继续利用原下部结构.论文介绍了该桥的施工工艺及控制要点,是高速公路改扩建中对原桥梁结构利用程度最大的一项重大实践.

The upper and middle structures of the West Yachi Separation Overpass in the Beijing-Hong Kong-Macao expressway Shijiazhuang-Anyang section reconstruction and expansion project adopts a new steel box composite beam, which greatly reduces the self-weight of the superstructure and continues to use the original substructure. The construction technology and control points of the bridge are introduced in this paper. It is an important practice that maximizes the interest rate of the original bridge structure in the reconstruction and expansion of the expressway.