线条板底侧面清洁干净(不能有油污)，板上螺丝孔全部用丝攻攻牙一次。
The bottom side of the line plate shall be cleaned up (no oil stains), and all the screw holes on the plate shall be tapped with screw taps.
同时，通过大量的水泥混凝土板底应力计算，推导出了混凝土面板荷载与板底应力水平的关系式；
In the meantime, through a large quantity of cement concrete pavement stress calculation, the paper puts forward relation expression between load on concrete board and stress level under board;
而以板底拉应力等效为指标的基层顶面当量回弹模量值能较为真实地反映基层刚度和厚度变化对板底拉应力的影响。
But the principles of stress equivalence could accurately reflect the influence on the cement concrete pavement stress by the modulus and thickness of semi-rigid type base.
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