The paper analyzed the problems of common structure and design for middle and small span bridge, proposed some advice from standards, design methods and common structure characteristics etc.
分析了中小跨径桥梁常用结构及设计中存在的问题，针对问题从规范标准、设计方法、常用结构特点、荷载标准确定等方面提出了建议。
In this structure, the natural bridge support bar in the middle of two free pile after a wide span can be achieved.
在这种结构中，天然支架桥在两个自由杆的中间加桩后可达到很宽的跨度。
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