我国林区公路约有七万多公里,其中运材公路有六万余公里。这些公路由于受地形的限制,一般都是坡陡路险,转弯半径较小,绝大多数是砂石路面,还有少数土路基,使养路作业量较大,特别是多雨季节,雨水对路面的冲刷和对路基的浸蚀,以及寒冷地区冻害对边路、桥涵的破坏,给养路作业提出了更高的要求。 There are about 70,000 km of roads in our country’s forests, of which 60,000 km are shipped by road. Due to the terrain, these roads are generally steep slopes, turning radius is small, the vast majority of gravel road, there are a few soil subgrade, so that maintenance work is large, especially in the rainy season, the rain on the road Erosion and subgrade erosion, as well as frost damage in cold areas on the sidewalks, bridges and culverts damage to the road maintenance operations put forward higher requirements.