| 象山港海底隧道最小岩石覆盖厚度断裂损伤分析 |
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| 引用本文： | 王 刚,孔祥福,李术才,李景龙,王书刚. 象山港海底隧道最小岩石覆盖厚度断裂损伤分析[J]. 岩土力学, 2006, 27(Z1): 353-358 |
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| 作者姓名： | 王 刚 孔祥福 李术才 李景龙 王书刚 |
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| 作者单位： | 1. 山东大学 岩土与结构工程研究中心，济南 250061；2. 山东省交通规划设计院，济南 250031 |
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| 基金项目： | 国家自然科学基金委联合基金重点项目（No.50539080）；国家自然科学基金委面上项目（No.50574053）。 |
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| 摘 要： | 根据象山港海底隧道地质剖面和隧道轴线布置图，取其9个重点剖面位置，对海底隧道选线进行三维分析。每个剖面位置根据基岩的厚度选取隧道轴线设计位置、上抬和下移隧道轴线位置，应用基于断裂损伤模型的有限元程序对其进行数值分析研究。通过分析各个工况的损伤区、塑性区、应力状态、位移变化，研究洞室的稳定性；根据相邻工况的应力状态变化和位移变化，得到k30+100剖面位置在设计线下移2 m时为计算建议的底板线位置，并得到该剖面位置的最小岩石覆盖厚度。最后得出海底隧道计算建议的底板线位置。
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| 关 键 词： | 海底隧道 数值分析 损伤演化方程 最小岩石覆盖厚度 |
| 收稿时间： | 2006-06-29 |
Fracture damage analysis of rock cover in Xiangshan Harbour Subsea Tunnel |
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| WANG Gang,KONG Xiang-fu,LI Shu-cai,LI Jing-long,WANG Shu-gang. Fracture damage analysis of rock cover in Xiangshan Harbour Subsea Tunnel[J]. Rock and Soil Mechanics, 2006, 27(Z1): 353-358 |
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| Authors: | WANG Gang KONG Xiang-fu LI Shu-cai LI Jing-long WANG Shu-gang |
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| Affiliation: | 1. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China2. Shandong Provincial Communications Planning and Design Institute, Jinan 250031, China |
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| Abstract: | According to the geological section of the Xiangshan Harbour subsea tunnel, the tunnel axes of nine sections selected are researched and analysed. The appropriate tunnel axis of each section is fixed on through lifting and shifting the tunnel axis according to the thickness of bedrock. The paper applies the finite element program of fracture damage model to analyze different cases of the sections. Analyzing their damage zones, plastic zones, stress state and displacement variation in all the cases, the stability of the tunnel is studied. Based on the above analysis, the most appropriate tunnel axis position of every section is proposed. |
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| Keywords: | subsea tunnel numerical analysis damage evolution equation minimum thickness of rock cover |
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