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山区高速公路桥梁的改扩建设计是改扩建设计的难点和重点,桥梁如何拼宽直接制约着整条路线的改扩建方案。笔者以洛三高速公路为背景,通过对老路现状的分析和研究,提出了洛三高速公路改建扩容的必要性,对山岭重丘区高速公路桥梁改扩建的总体设计原则及桥梁拼宽方案进行了详细阐述,并对各种拼宽方案采用的原因及应注意的问题进行了论述。
The design and reconstruction of mountain highway bridges is the difficulty and emphasis of the reconstruction and extension design. How to bridge the width of bridges directly restricts the reconstruction and extension of the entire route. Based on the analysis and study of the current status of Lao San Expressway, the author puts forward the necessity of reconstruction and expansion of Lao - San Expressway. Based on the overall design principle and bridge width plan of expressway and bridge extension in expressway, Elaborated on, and explains the reasons for the various spell width programs and the problems should be noted.