公路修筑在崇山峻岭地带,溪流湍急,飘浮物多,尤其在木材产区更甚。因此,在建筑桥梁时,多采用较大跨径如撑架式、豪氏下承式木桁架桥。这些木桥由于结构较复杂,维修材料困难,因而在养护及修理上存在不少困难。几年来由于在各级党政的正确指导下,克服困难,逐步摸索积累了一些经验,延长了木桥的使用寿命,取得了一些成绩,现将广东怀集公路工区的做法、体会介绍如下: 一、做好防腐工作,健全管养制度怀集工区在养护豪氏下承式木桁架桥时,首先是在防腐上着手。几年来他们在检查桁架桥及其他式样大小木桥时,体会到受腐蚀最快的是在积水和有污物垃圾的地方。在桁架部分主要积水的地点是在上下弦 Highway built in the mountains, stream turbulent, floating objects and more, especially in the timber producing areas even more. Therefore, in the construction of bridges, the use of larger span, such as truss-type, Under-Wood truss bridge. Due to their complex structure and difficult maintenance materials, these wooden bridges have many difficulties in maintenance and repair. Over the past few years, due to the correct guidance of party and government at all levels, overcoming difficulties and gradually groping accumulated some experience to extend the service life of the wooden bridge and achieved some results. Now the practice of Huaiji Highway in Guangdong Province is summarized as follows: First, do a good job in preservative work, a sound regulatory system Huaiji work area in the maintenance of Under-Wood truss bridge, the first is to start on the preservation. Over the years, when examining truss bridges and other style-sized wooden bridges, they realized that the fastest-eroded area was where there was water and rubbish. In the truss part of the main water is in the upper and lower chords