在我国现有公路中,县乡公路大多数是在六、七十年代修建的,一般均采用泥结碎石路面这一建筑形式。尤其是山区公路,因为沿途石料来源较广,材料价格低廉。虽然这种路面使用周期较短,只限于运输量较少的山区公路,但鉴于目前财力现状,泥结碎石路面在现有公路总量中仍占有很大比重,并将持续较长一段时间。因此,我们应力求在养护中提高泥结碎石路面的技术状况,以增强其抗灾和通过能力。我县地处川北山区,大都为山岭地带,县乡公路有778.9公里。这些公路由于在新建时需用急、时间紧、资金少,大都未按设计规范标准施工,因此,道路排水构造物少,路面底层块石厚度不够,面层碎石铺筑质量差, Among the existing highways in our country, most of the roads in the county and townships were built in the 1960s and 1970s, and the construction forms of clay-bonded gravel pavement are generally adopted. Especially mountainous roads, because of the wider sources of stone along the way, the material price is low. Although this type of pavement has a short service life and is limited to mountainous roads with less traffic, due to the current state of financial resources, clay-bonded gravel pavement still accounts for a large proportion of the total existing roads and will continue for a long period of time . Therefore, we should try our best to improve the technical condition of clay-bonded gravel pavement in conservation so as to enhance their resilience and capacity. My county is located in northern mountainous areas, mostly mountainous areas, county road 778.9 kilometers. Due to the urgency, tight schedule and low capital, most of these roads are not constructed according to the design standards. Therefore, there are few road drainage structures, the thickness of stone blocks on the road surface is not enough, the quality of pavement gravel paving is poor,