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文章应用材料破裂过程数值分析RFPA(Realistic Failure Process Analysis)系统,对公路加宽改建纵向裂缝的开裂过程进行了数值模拟研究。数值分析表明,由于路基的不均匀沉降和新旧路基的衔接处的强度不均匀导致路基中衔接处首先出现裂缝,然后裂缝反射到基层,最后反射到面层,导致面层弯拉开裂。建议对地基和路基尤其新旧路基的衔接处进行加固处理,从而减少纵向开裂。
In this paper, the RFPA (Realistic Failure Process Analysis) system is applied to simulate the cracking process of longitudinal cracks in highway widening and rebuilding. Numerical analysis shows that due to the uneven subgrade settlement and the convergence of the old and new roadbed, the strength of the joints is not uniform, the cracks in the subgrade first appear, then the cracks are reflected to the grassroots and finally to the surface layer, leading to the bending and cracking of the surface layer. It is recommended to consolidate the joints of foundation and subgrade, especially between old and new subgrade, to reduce longitudinal cracking.