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关于霍克-布朗参数与等效的莫尔-库伦参数在计算斜率临界加速度和永久位移中的差异的研究
Cheng Li1, Xi Zhao2, Xingqian Xu3
1School of Architectural Engineering, Kaili University, Kaili, 556011, Guizhou, China.
Scientific reports
|July 2, 2024
概括
莫尔-库伦标准仅限于岩石质量. 将霍克-布朗参数转换为相当的莫尔-库伦参数被探索为斜率稳定性分析,揭示了临界加速计算的局限性.
科学领域:
- 地质技术工程 地质技术工程
- 岩石力学 岩石力学 岩石力学
- 斜坡稳定性分析
背景情况:
- 莫尔 - 库伦 (MC) 标准被广泛使用,但不适合岩石质量断裂包裹.
- 建议将霍克-布朗 (HB) 参数转换为同等的MC参数,用于岩石坡度分析.
- 在计算临界斜坡加速度时,同等MC参数的准确性需要验证.
研究的目的:
- 为了将HB参数转换为同等的MC参数,考虑斜率角度.
- 通过有限元极限分析来比较使用HB和同等MC参数的临界加速度计算.
- 分析参数对临界加速和永久斜坡位移的影响.
主要方法:
- 将HB参数转换为同等的MC参数 (两种情况:考虑和不考虑斜坡角).
- 用于数值建模的下限有限元极限分析.
- 对临界加速和永久位移结果的比较分析.
主要成果:
- 相当的MC参数 (没有斜率角度) 产生明显更高的临界加速比HB参数和MC与斜率角度.
- 来自MC的临界加速度与斜率角度紧密匹配HB参数.
- 参数灵敏度分析显示HB参数 (D,GSI,mi,sci) 对临界加速度的影响不同,第二种情况没有一致的规律性.
结论:
- 相当的MC参数,特别是当不考虑斜率角度时,可以高估临界加速.
- 这项研究强调了同等MC参数在准确评估岩石斜坡稳定性方面的局限性.
- 建议使用HB参数,以便在岩石斜坡中更可靠地评估关键加速和永久位移.
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