摘要
双连拱公路隧道在平面线路、洞口位置的选择上较分离式隧道自由度大,在一些中短隧道建设中,往往采用双连拱隧道结构形式。山西省离石隧道为我国第一条黄土连拱公路隧道。本文结合该工程实际,进行黄土连拱隧道的关键施工力学问题研究:正洞上下台阶法与侧壁导洞法施工方案比较研究;先左洞(靠山一侧)施工方案和先右洞施工方案的对比。计算结果表明对于偏压黄土连拱隧道应采用先开挖靠山一侧的侧壁导洞法进行施工。
With the merits in road line and entrance location choosing, the multi- arch tunnel always be adopted in the construction of short tunnel compared with separated two single tunnels. The Lishi tunnel in Lishi city of Shanxi Province is the first multi - arch loess tunnel. Considering the actual condition of this tunnel, several key mechanical problems invalved in the construction of the tunnel have been studied： The comparison of three - heading construction method and benching tunneling method, and the construction sequence of the two tunnels is carried out. Based on the numerical simulation, it can be concluded that the three heading construction method with the tunnel close to the mountain tunneled first should be chosen in the construction of the multi-arch loess tunnel.
出处
《地下空间与工程学报》
CSCD
2005年第6期944-947,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
施工力学
tunnel
multi-arch tunnel
FEM
construction mechanics
