某公铁两用桥的钢梁,采用4×80m连续栓焊三角形桁梁。钢梁杆件由山海关桥梁厂制成,惟存放已约两年,所涂富锌漆有局部锈蚀,恐时久失效,将使钣面摩擦系数降低,故准备在工地将杆件进行喷砂并重新涂漆。待杆件运达工地后,发现富锌漆大部分尚好,是否仍需在工地喷砂和涂漆,以及采用何种简便可靠的 A steel dual-purpose bridge beam, using 4 × 80m continuous bolt welded triangular truss. Steel beam rod made by the Shanhaiguan Bridge Factory, but has been stored for about two years, the local coverage of zinc-rich paint rust, fear of failure for a long time, will reduce the sheet metal friction coefficient, it is prepared at the site will be sandblasted rod And repaint. When the rod arrived at the site, it was found that most of the zinc-rich paint was still good, whether sand blasting and painting were still required at the site, and what kind of simple and reliable