摘要
山区隧道由于受地形及展线限制,一些较短的隧道常常选用连拱结构型式。本研究借助三维有限元计算机模拟,对渝黔高速公路天坪丘连拱隧道的稳定性进行了系统的研究。根据工程实际,构建了三维计算模型,进行了应力、位移与塑性区分布等方面的计算。通过整体、衬砌与中墙的拉应力、剪应力、位移与塑性区结果分析,表明该隧道是稳定的,但应注意局部的应力集中问题,建议对这些关键部位加强监测。
The multi-arch tunnel is often adopted in the construction of short tunnel in mountain area, due to the restriction of landform and road line. By means of three dimensional numerical simulation, the stability study of Tianpingqiu tunnel on the expressway from Chongqing to Guiyang is carried out. The 3 - D computation model is established according to actual engineering, the calculation results for stress, displacement and plastic zone were obtained. The analysis of computation results for the total model, liner and middle -wall show that the tunnel is stable, whereas the stress concentration exists in some part, and the monitoring should be reinforced in these sections.
出处
《地下空间与工程学报》
CSCD
2006年第5期847-850,共4页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金(50309017)
重庆市科委资助
关键词
隧道
连拱隧道
有限元
弹塑性
数值模拟
tunnel
multi-arch tunnel
FEM
elastoplasticity
numerical simulation
