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木桥结构简单,施工容易,在荷载标准要求不高,短时间内通过交通量不大的路线上,采用木料较使用其他材料是合理而又便宜得多。但由于木材容易腐蚀,未经防腐处治,一般只能使用8～10年,特别是外露的桥面系,湿度不适时霉烂迅速,交通频繁时磨损剧烈,寿命极短,一般三年左右郎须抽换。没有铺装的木桥面,只靠紧密铺在纵(横)梁上的
The structure of the wooden bridge is simple, the construction is easy, and the requirements of the load standard are not high, and the traffic through the short time is small. It is reasonable and much cheaper to use wood instead of other materials. However, due to easy corrosion of wood, without preservative treatment, the general can only be used for 8 to 10 years, especially the exposed bridge deck, rotten when the humidity is not suitable, severe traffic wear and tear, life expectancy is very short, Swap. No pavement of the wooden deck, only by laying on the vertical (horizontal) beam