基于板底脱空的水泥混凝土路面动水压力试验研究

Research on Hydrodynamic Pressure of Void Under Concrete Pavement

通过室内动水压力模拟试验,研究不同浸水饱和度、脱空面积、荷载位置、荷载大小和荷载速度等条件下的水泥混凝土路面板底脱空处的动水压力。结果表明:脱空位置在板角处引起的动水压力最大,为最不利脱空位置;随着脱空面积的增多,动水压力呈线性增大;当浸水饱和度低于60%时,动水压力增加的幅度较小,当浸水饱和度高于60%时,动水压力急剧增大;随着荷载速度的增大,动水压力显著增大,但荷载大小对动水压力影响不显著。

Based on the results of hydrodynamic pressure simulation test,the paper evaluated the most unfavorable position of void under slab,and analyzed the effects of retting saturation,void area,load,load position and load speed on the reduce of void under slab.Research shows that： the most unfavorable position of void under slab is on the slab corner;the hydrodynamic pressure will increase with the void area increasing;when its retting saturation is smaller than 60%,the hydrodynamic pressure increase slightly,and its retting saturation exceed 60%,the hydrodynamic pressure increase sharply;and it is effective to reduce hydrodynamic pressure by decreasing load speed.