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1952年公路总局发下翻译的苏联桥涵标准图,当时,我们对简支梁木桥标准图进行了学习并准备推行。但存在以下三个问题: 一、标准图桥面为木板:东北地区骡马大车多,蹄铁挂钉,伤损木板很快,落叶松木板桥面一般只能维持二三年,因此拟改为沙石铺装。二、主梁的排列布置:边梁为两根,中间部份有两根或三根的,相邻孔的梁有13根或14根的,不对称均匀,即使双排椿式墩,梁的布置也是如此。三、净宽6公尺时(此种情况最多)桥面木长6.5公尺以上,须用8公尺长木料锯成,要耗费很多珍贵的大料作桥面板。
In 1952, the General Administration of Highway made a translation of the Soviet bridge and culvert standard map. At that time, we studied and prepared the standard plan of the simply supported beam bridge. However, there are the following three problems: First, the standard bridge deck is plank: Northeast Mule carts and horseshoe hooks, wood veneers quickly, larch wood deck can only maintain two or three years, it is intended to To sandstone pavement. Second, the arrangement of the main beam: the two side beams, the middle part of two or three, the adjacent hole beam 13 or 14, asymmetrical even if the double row of piles, the beam The same is true for the layout. Third, the net width of 6 meters (in this case up to) Deck length of 6.5 meters or more, must be 8 meters long timber sawing, to spend a lot of precious large material for the bridge deck.