三维快速拉格朗日法在安全顶板厚度研究中的应用  

Application of fast lagrangian analysis of continua to researching on safe rock covers of Xiamen subsea tunnel

作　　者：李廷春[1,2] 李术才[1,3] 邱祥波[1] 陈卫忠[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学重点实验室,湖北武汉430071 [2]山东科技大学土木建筑学院,山东泰安271019 [3]山东大学岩土与结构工程研究中心,山东济南250061

出　　处：《岩土力学》2004年第6期935-939,共5页Rock and Soil Mechanics

基　　金：国家自然科学基金(编号:59939190);国家重点基础研究发展规划(编号:2002CB412705)资助

摘　　要：为了合理选择厦门海底隧道的最小顶板厚度。在厦门海底隧道轴线的地质剖面图上,选取了6个典型剖面,在不同的剖面及同一剖面的隧道的不同深度,应用三维快速拉格朗日法,分两个步骤:第l步,在较大的深度范围内初选隧道的项板厚度:第2步,在第1步初选结果的基础上,在较小的深度范围内,进一步选择。通过对开挖后的应力分布、洞周位移、塑性区等的分析,最后得出厦门隧道的最小顶板厚度。同时,得到一些对后续施工和其他工程有一定指导意义的有益结论。In order to select safe rock cover of Xiamen subsea tunnel, FLAC-3D (fast Lagrangian analysis of continua in 3 dimensions) numerical analysis for 6 profiles was done along the longitudinal of the tunnel. Based on different sections and different covers in the same section, rock covers is considered in the numerical simulations in two steps. Firstly, rock covers is pre-selected in a comparative large range; secondly, they are chosen progressively in a limited range. From the numerical results of stress distribution, displacements and plastic zones of rock mass after excavation, it can be concluded that the tunnel is stable when the rock covers of the subsea tunnel decrease 4 m comparing to the original design elevation. Some conclusions are obtained so as to benefit the future construction and other rock engineering.

关 键 词：厦门海底隧道 快速拉格朗日法 最小顶板厚度 

分 类 号：TB115[理学—数学]