交通荷载作用下港区道路受力特性研究

Study on Mechanical Characteristics of Port Road under the Vehicle Load

依托交通荷载作用下港口道路现场试验,采用FLAC3D建立数值分析模型,其中铺面结构采用理想弹性模型模拟,地基采用M-C模型模拟,对地基中的附加应力与竖向应变等进行了系统的数值分析.结果表明:加载位置下浅层地基中的附加应力有较明显的应力集中现象,随地基深度的增加该应力集中现象逐渐减弱;淤泥质土层中的竖向应变值较大,且沿深度方向减小幅度较小.最后,对港区道路设计计算中荷位、轮压和砂垫层厚度等重要指标进行了参数分析.

Based on the field tests of port road under the vehicle load, a series of numerical simulation was conducted using FLAC3D to analyze the deformation characteristics of port reclamation ground under the vehi- cle load. The pavement is modelled by the elastic model and the ground is modelled by the M-C model. A de- tailed analysis of the additional stress and vertical strain of ground is performed. Simulation results show that the additional stress concentrates in shallow ground under the loading position and this phenomenon disappears gradually along the depth. The vertical strain of silt soil is larger than the other soil and it decreases slightly a- long the depth. Lastly, a series of parameters analysis was carried out, such as loading position, wheel pres- sure and sand cushion thickness.