| 蒋 兵.基于Unwedge程序的地下洞室围岩力学参数敏感性分析Journal of Water Resources and Water Engineering[J].,2016,27(3):209-212 |
| 基于Unwedge程序的地下洞室围岩力学参数敏感性分析 |
| Sensitivity analysis of mechanical parameter of wall rock in underground cavity based on Unwedge program |
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| DOI：10.11705/j.issn.1672-643X.2016.03.41 |
| 中文关键词: 隧洞 Unwedge程序 安全系数 参数敏感性 围岩力学参数 地下洞室 |
| 英文关键词: tunnel Unwedge program safety factor parameter sensitivity mechanical parameter of wall rock undergr-ound cavity |
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| 中文摘要: |
| 以某导流隧洞为工程背景，运用Unwedge程序以关键块体的重量为目标，对比优选出设计开挖隧洞的合理洞室走向和开挖断面型式，并以左边墙6号块体为研究对象，关键块体的安全系数作为评价指标，对拟定的6个影响块体围岩稳定的力学参数进行敏感性分析，得到黏聚力Sc的敏感度最高，其敏感度为0.922，对工程稳定性影响最大，内摩擦角Sf敏感度最低，敏感度为0.002，对工程稳定性影响最小。因此，通过围岩力学参数敏感性计算可为勘察设计人员合理确定参数值精度提供依据。 |
| 英文摘要: |
| Taking a diversion tunnel as engineering background, the paper applied Unwedge program and took the rock mass of key block as a target to choose the reasonable direction of tunnel and type of excavated section.Meanwhile,it took No.6 block of left wall as the research object,and safety coefficient as evaluation indicator, and carried out sensitivity analysis on six parameters and the highest sensitivity of cohesion Sc is 0.922 which has the greatest influence on engineering stability and the lowest sensitivity of internal friction angle Sf is 0.002 which has the least influence on engineering stability.Therefore, the sensitivity calculation of mechanics parameter for wall rock can provide the basis for designer to reasonably determine the precision of parameter value. |
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