旧水泥混凝土路面沥青加铺层应力影响因素分析

为了分析旧水泥路面沥青加铺层的应力分布情况，采用三维有限元力学计算方法，分析加铺层模量、旧水泥混凝土板的有关参数以及基础条件对加铺层应力的影响。由计算可知，在一定程度内，加铺层模量的增大有助于减弱荷载造成的损害；适当增大接缝宽度，提高基层和土基的模量及有效处治板底脱空，可以减小沥青加铺层内的应力，延缓或防止反射裂缝发展。

Analysis for Stress Influences of Asphalt Overlay on Old Cement Concrete Pavement

In order to analyze stress distribution of asphalt overlay on old cement concrete pavement, this paper analyzes the modulus of overlay, relevant parameters of old cement concrete slabs and influences of foundation conditions on stress of overlay by means of 3D finite element mechanical calculation method. Based on calculation, increase of the modulus of overlay is helpful for reducing damages caused by loads to a certain extent; appropriate enlargement of joint width, increase of the modulus of base course and subgrade and effective treatment of voids beneath concrete slabs can reduce the stress in asphalt overlay and postpone or prevent development of reflective cracks.