高速隧道刚性基础路面加铺应力吸收层力学特性研究

Study on Mechanical Characteristics of Stress Absorbing Layer on Rigid Foundation Pavement of High Speed Tunnel

橡胶沥青应力吸收层常用于水泥混凝土路面改造工程,因其优异的路面结构层间处治性能,而具有广阔的应用前景。本文以厦蓉高速青新隧道为工程背景,基于ANSYS软件建立有限元模型,并施加最不利偏载工况进行计算分析,探讨了加铺应力吸收层前后路面的力学性能,并对沥青铺装层厚度、沥青铺装层弹性模量、应力吸收层厚度等参数对路面力学性能影响进行了分析。

Rubber asphalt stress absorbing layer is often used in the reconstruction of cement concrete pavement,and has a broad application prospect because of its excellent performance of pavement structure interlayer treatment.Based on the engineering background of Xiarong high-speed Qingxin Tunnel,the finite element model is established based on ANSYS software,the most unfavorable off-load condition is applied for calculation and analysis,and the mechanical properties of the pavement before and after the installation of stress absorption layer are discussed.Then the influence of parameters,such as the thickness of asphalt pavement layer,elastic modulus of asphalt pavement layer and stress absorption layer thickness,etc.,on the mechanical properties of the pavement is analyzed.