存在不确定性分离面危岩体的锚固工程优化设计Optimization Design of Anchor Engineering for Dangerous Rock Mass with Uncertain Separation Surface
唐朝晖;宁可;柴波;赵毅;
摘要(Abstract):
危岩体无显著变形时,很难从一组结构面中确定分离面位置。为了科学加固此类危岩体,从2个工程案例概化出存在不确定性分离面危岩体的稳定性分析模型,探讨了分离面位置变化对倾倒式和滑移式危岩体稳定性和剩余下滑力(矩)的影响规律,提出了锚固工程优化设计的标准。结果表明:两类危岩体潜在分离面的深度增大时,倾覆力矩或剩余下滑力均呈现先增后减的趋势,稳定性最小位置为关键分离面。锚固工程可采用长短不同的锚固体,长锚杆穿过低于设计安全系数的潜在不稳定区,短锚杆穿过关键分离面和最大剩余下滑力的位置,所提出的优化设计方法对基岩山区地质灾害治理工程设计具有指导意义。
关键词(KeyWords): 岩质危岩体;多层结构面;稳定性分析;锚固支护
基金项目(Foundation): 国家自然科学基金项目(41572256;41877253);; 中央高校基本科研业务费专项资金资助项目(CUGL160408)
作者(Author): 唐朝晖;宁可;柴波;赵毅;
Email:
DOI: 10.19509/j.cnki.dzkq.2019.0620
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