围岩松软、呈层性显著以及受爆破震动和开采动载的反复作用是回采巷道的基本特征。
Soft and thin-bedded characteristics and dynamic load action from mining and blasting shock are some basic features of the actual mining roadways in coalmine.
贫混凝土用于路面基层时，由于受到荷载应力和温度应力的反复作用，需研究其疲劳特性。
Fatigue property of lean concrete should be studied when the material is set as base course since it withstands the repeated actions of load stress and temperature stress.
作为沥青混凝土路面的主要损坏现象之一，车辙是在交通荷载反复作用下产生竖向永久变形的积累。
Being a major damage phenomenon of asphalt pavement, ruts are occurred gradually as the accumulation of permanent deformation under repeated application of traffic loads.
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