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在地基可靠,墩台承载力有余的条件下,对中小型公路桥的上部构造,可采取在原有梁板上铺设整体浇筑式、装配式或装配一整体式悬臂板的方法予以加宽,而无需加宽和改建墩台结构。但这样的设计方案有不少缺点,从而限制了它的实际应用。特别当原有梁不能承受新铺板的重量时,还需要予以补强。此外,由于新铺板不能太厚,伸出长度(加宽)受到了限制,其承重能力也不大,只能在新铺板上加铺人行道,而车行道一般只能在原有上部构造范围内加宽,因而
Under the condition of reliable foundations and sufficient bearing capacity of piers and abutments, the upper structure of medium and small-sized highway bridges may be broadened by laying the integral pouring type, assembling type or assembling an integral cantilever plate on the original beam plate, There is no need to widen or modify the pier structure. However, this design has many shortcomings, thus limiting its practical application. Especially when the original beam can not afford the weight of the new plank, it needs to be reinforced. In addition, due to the new plank can not be too thick, extended length (widened) is limited, its load-bearing capacity is not large, only new paving the sidewalks, and roadways generally only in the original structure of the upper structure Widen, thus