摘要
为了验证厦门海底隧道最小顶板厚度比设计厚度减小时隧道的稳定性。在厦门海底隧道轴线的地质剖面图上 ,选取了 4个典型剖面 ,根据设计方案 ,将隧道轴线高程比原设计升高 4m ,依据流固耦合理论 ,应用三维快速拉格朗日法进行数值分析。从隧道轴线升高 4m时 ,开挖后的应力分布、洞周位移、塑性区、孔隙水压力分布等结果 ,可以得出将设计方案的轴线位置升高后 ,隧道是稳定的。同时 ,得到一些对后续施工和其他工程有一定的指导意义的有益结论。
In order to verify the stability and rock cover of Xiamen subsea tunnel which is under design now. According to coupled fluid-mechanical theorem, FLAC^(3D) (Fast Lagrangian Analysis of Continua in 3 Dimensions) numerical analysis for 4 profiles has been done along the longitudinal of the tunnel. Based on original design of the tunnel, rock covers with a decrease of 4 m is considered in the numerical simulations. From the numerical results of stress distribution, displacements,plastic zones of rock mass and pore-pressure distributions after excavation with rock cover decreasing 4 m,it can be concluded that the tunnel is stable even the rock cover of the subsea tunnel decreases 4 m compared to the original design elevation. Some conclusions are obtained which are useful for the future construction and other rock engineering.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2004年第3期397-401,共5页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金资助项目 (50 3790 52
50 0 0 4 0 0 7)
