木桥最大的缺点是容易腐朽,寿命不长,维修频繁,养护困难。自从提出使用防腐处理的办法以后,木桥的使用寿命大大地延长了。但无论是浆膏法也好,或是热冷槽法也好,都要有一套设备,成本也较高,如果在操作上稍有疏忽,还会影响防腐质量,而失去防腐意义。我们从很多古老的房屋中可以看出,虽然经过几十年或是一百多年以后,它的梁木屋柱等还是很好的,剥去表皮,里面还是象新的一样,只有陈旧痕迹,没有腐烂表现。这就充分地说明了,如果使木料不受太阳、雨水等自然侵害,它是不容易腐朽的,是可以保持相当长的年代的。 1957年第一季度,笔者在江西南赣线上310k地方修建了一座2孔12公尺的半永久式桥,是用油毛毡作木桥面防水层修的,今年三月间特地去看了一次,对梁木面板进行了检查,全部木料完好如新,无漏水及其他变质迹象。今年又在太(和)兴(国)线上修建了一座5孔延长 The biggest drawback of wooden bridge is easy to decay, life expectancy is not long, frequent maintenance, maintenance difficulties. Since the proposed use of anti-corrosion treatment, the service life of wooden bridges has been greatly extended. However, whether it is paste method Ye Hao, or hot chill method is also good, have a set of equipment, the cost is higher, if the operation is slightly negligent, but also affect the quality of preservatives, but lost the meaning of anti-corrosion. We can see from many old houses that though it is still very good after decades or 100 years, stripping the epidermis, it is just as old as the new one, with only traces of old age, No decay performance. This fully shows that if the wood from the sun, rain and other natural damage, it is not easy to decay, it can be maintained for a long period of time. In the first quarter of 1957, the author built a 2-hole, 12-meter semi-permanent bridge at 310k on the Jiangxi Nan-Gan line, which was covered with oil felt for the wooden deck waterproofing layer. In March this year, Beam wood panel inspection, all wood intact as new, no leakage and other signs of deterioration. This year it has also built a 5-hole extension on the Tai (and) Xing (State) Line