柔性基层沥青路面结构内部的应力应变

Inner Stress and Strain of Asphalt Pavement Structure with Flexile Base

利用三维有限元软件研究沪宁高速公路扩建工程中柔性基层在实测荷载作用下结构层内的应力应变,并与传统的圆形均布荷载作用下的路面结构作比较。研究表明,采用柔性基层并不会使土基受力过大,土基的变形在允许范围之内;级配碎石层顶和层底的受力大小相差不大,变形也很缓和。

The article uses 3D FEM to analyze the stress and strain in the flexible base structure of Shang- hai-Nanjing Expressway expansion project with the actual load. And it is compared with the pavement structure under the traditional circular uniform load. The research result shows that： using flexible base cannot bring about excessive stress on foundation, the deformation of foundation is within the allowance; the stress at the top and bottom of graded broken stone layer are similar, and the deformation is gentle.