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在林区修建跨越较大河流的公路桥梁,木桁架很为适宜。但因各个地区客观条件和施工设备的不同,要求采取的操作方法也就不一。我们在修建两座一孔20公尺戛乌氏上承式木桁架桥时,遇到了这种情况。当时,摆在面前的问题是:在雨季怎样来安设桁架?如果采用搭支架,就地安装的方法。那必须要求支架坚固,并能承受预计洪水的冲击。可是,桥位基地的土壤不允许打桩。如果采用块石装木(竹)笼支架,其本身体积太大,泄
In the forest area to build a bridge across the larger rivers and bridges, wood truss is very suitable. However, due to the objective conditions in various regions and the different construction equipment, operational methods are also required to be different. We encountered this situation when we built two 20-meter Horsetail wooden truss bridges with one hole. At the time, the question before us was: How to set up the truss during the rainy season? That must require the stand to be strong and withstand the impact of the expected flood. However, the soil at the bridge site does not allow piling. If you use stone block wood (bamboo) cage bracket, its own volume is too large, vent