平曲线路段水泥混凝土路面预应力方案研究

Research on Prestressing Schemes of Cement Concrete Pavement in Horizontal Curve Road Section

目前文中预应力混凝土路面的研究多局限于平直路段,为了将预应力混凝土路面推广应用于平曲线路段,从预应力筋布置和力学行为两个方面分析平曲线因素对预应力混凝土路面的影响,提出平曲线路段路面预应力方案,建立有限元分析模型,分析无黏结和有黏结预应力作用下平曲线路段预应力混凝土路面的受力特点,提出优化措施.结果表明:在平曲线路段,路面板内的预压应力分布均匀性比平直路段差,斜向预应力方案具有较好的适应性;通过优化,平曲线路段预应力混凝土路面具有较好的力学特性.

At present,the research of prestressed concrete pavement is mostly limited to straight road sections.In order to popularize prestressed concrete pavement to flat curve road sections,the influence of flat curve factors on prestressed concrete pavement was analyzed from two aspects of prestressed reinforcement arrangement and mechanical behavior.The prestressed scheme of pavement on flat curve section was put forward,and the finite element analysis model was established to analyze the stress characteristics of prestressed concrete pavement on flat curve section under the action of unbonded and bonded prestress,and the optimization measures were put forward.The results show that the distribution uniformity of preloading stress in pavement slab is worse than that in straight road section,and the oblique prestress scheme has better adaptability.Through optimization,the prestressed concrete pavement on the horizontal curve section has better mechanical characteristics.