Pavement structure layer inside base course is usage quantity of main supporting course, its usage direct influence the function pavement.
路面结构层中基层是主要承重层，它的使用性能直接影响路面的使用质量。
The contact condition between PCC surface layer and poor cement concrete base course directly influences the space between joints and the loading stresses in the pavement.
水泥混凝土路面面层与贫混凝土基层界面的接触状况，不仅直接影响到路面的接缝间距，同时也对路面的荷载应力有较大影响。
Because of the moisture evaporation and the varied temperature, the pavement and its semi-rigid base layer are easy to crack in the course of construction and use.
路面及半刚性基层在修建和使用过程中，由于水份蒸发以及温度的变化，容易产生裂纹。
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