水泥混凝土路面高聚物注浆修复前后动力响应分析

Dynamic Response Analysis of Cement Concrete Pavement Before and after Polymer Repairing Grouting

高聚物注浆修复技术是一种经济高效的水泥混凝土路面脱空处置方法,但修复后路面力学性能恢复状态尚不明确.基于ABAQUS有限元软件建立了水泥混凝土路面三维有限元数值模型,对比分析了脱空路面、高聚物修复路面和水泥浆修复路面在交通荷载作用下的路表弯沉、水泥板底拉应力等力学性能,并详细讨论了路面脱空面积、脱空深度及交通荷载对路面力学性能的影响.研究结果表明:路面脱空面积对路面力学响应的影响大于脱空深度对路面力学的影响;路面在脱空状态下的力学性能较差;高聚物和水泥注浆修复路面脱空后,路面受力和变形均恢复到正常路面水平,但就修复材料本身受力而言,高聚物材料比水泥浆材料更具有利用价值.

Polymer grouting technology is a kind of economical and efficient method for disengaging pavement.However,the application of this technology for the restore statue of the mechanical properties of the pavement after repairing is not yet clear.In this paper,the three-dimensional numerical model of the cement concrete pavement was established by the ABAQUS software.The mechanical properties of disengaging pavement,polymer-repaired pavement and cement-repaired pavement under traffic load were compared and analyzed,such as the surface deflection and the tensile stress of cement slab bottom.The effects of pavement void area,void depth and traffic load on the mechanical properties of pavement were discussed in detail.The results showed that the effect of void area is greater than that of void depth on the mechanical properties of pavement.The mechanical properties of pavement are poor under void condition.The stresses and deformations of the pavement recover to the normal level after the disengaging repaired by both the polymer and the cement grouting.However,the polymer material was more valuable than the cement material in terms of the stress on the repaired material.