目前,铺筑沥青路面使用的找平基准主要有4种型式:一是固定基准,即悬线法;二是接触跨越式浮动平衡梁基准;三是非接触式电子平衡梁基准;四是滑靴式基准。实践证明,在下面层、中面层采用悬线法,中面层、上面层采用接触跨越式浮动平衡梁基准或非接触式 At present, there are mainly four types of leveling standards for paving asphalt pavement: one is a fixed reference, that is, a hanging line method; the other is the reference of a floating leveled balance beam; the third is a reference of a non-contact electronic balance beam; Benchmark. Practice has proved that, in the following layers, the surface layer using hanging line method, the surface layer, the top layer by contact with the floating balance beam benchmark or non-contact