怒江美丽公路绿道悬挑结构设计

Design of Cantilever Structure in the Greenway of Nu River Beautiful Highway

怒江美丽公路绿道与国道G219线丙六公路改建工程同岸并行布线,总体走向沿怒江峡谷由北至南。由于地形条件限制,部分路段绿道无法采用常规路基或者桥梁,只能在原公路路基挡墙上设置悬挑结构。悬挑结构为三角形钢架,上铺钢桥面板,通过钢花管与锚固于原挡墙,受力可靠,同时重量较轻,不致于影响原路基挡墙的稳定性。

The Greenway of Nu River Beautiful Highway is routed parallel to the same bank as the National Highway G219,and the overall direction is along the Nu River Canyon from north to south.Due to the restriction of terrain conditions,some sections of the greenway cannot use conventional subgrades or bridges,and can only be used to hang a cantilever structure outside the retaining wall of the original highway.The cantilever is a triangular steel frame structure with a steel bridge deck on the top,which is anchored to the original retaining wall by steel pipes and is reliable in force and light in weight,which will not affect the stability of the original subgrade retaining wall.