摘要
水下隧道覆盖层厚度目前基本上是凭经验确定的,采用不同的经验公式得到的计算结果差异很大。文章针对目前情况提出了采用有限元的求解方法,并结合公路隧道施工规范,模拟了拟建的重庆朝天门两江隧道在不同隧道覆盖层厚度时的拱顶位移和拉应力的分布及大小。通过与标准隧道的比较,得出了该隧道的合理覆盖层厚度,对同类工程有一定的参考价值。
At present, overburden thickness of a subaqueous tunnel is in general determined by experience, which leads to diversified results as obtained by different empirical formulae. In this context, authors of the paper, considering the Highway Tunnel Construction Code, adopted FEM to compute the crown displacements and principal tensile stresses in arch crown under different overburden thicknesses of a subaqueous tunnel. Through comparison with a typical tunnel, the reasonable overburden thickness is obtained. The study is helpful for similar projects.
出处
《现代隧道技术》
EI
北大核心
2007年第2期5-9,共5页
Modern Tunnelling Technology
基金
获国家自然科学基金(50309017)
重庆市科委资助
关键词
水下隧道
覆盖层厚度
拱顶位移
拉应力
有限元模拟
Subaqueous tunnel
Overburden thickness
Crown displacement
Tensile stress
FEM