采用有限元法对川西北某隧道地应力分析
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摘要
采用水压致裂法和应力解除法,对川西北某隧道应力进行实测和分析,得到了各测点原岩应力的大小和方向。结果表明,水平主应力为第一主应力,构造应力在测试区域内占优势,区域应力场类型为σ_H>σ_v>σ_h型应力场;测试区域开挖影响区内、外最大主应力优势方向为NWW向,可代表测点周边一定范围内岩体地应力状态,为未来该区的工程建设提供一定依据。
Based on the hydraulic fracturing in-situ stress and stress relief measurements,the stress from the tunnel in Northwest Sichuan was analyzed,achieving the value and direction of stress in those measurement point. The results show the horizon stress is the maximum horizontal principal stress. The stress is dominated by structural stress,whose feature the feature of stress is σ_H>σ_v>σ_h.The interior and external areas of studied area have the maximum horizontal principal stress with the direction of NWW. Those above show the characteristics of rock stress and provide the reference for the construction in this region in future.
Based on the hydraulic fracturing in-situ stress and stress relief measurements,the stress from the tunnel in Northwest Sichuan was analyzed,achieving the value and direction of stress in those measurement point. The results show the horizon stress is the maximum horizontal principal stress. The stress is dominated by structural stress,whose feature the feature of stress is σ_H>σ_v>σ_h.The interior and external areas of studied area have the maximum horizontal principal stress with the direction of NWW. Those above show the characteristics of rock stress and provide the reference for the construction in this region in future.
引文
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[4]余云燕,李国良,赵德安,等.两水隧道地应力测量及三维地应力场多元回归分析[J].现代隧道技术,2016,53(4):29-36.
[5]赵国平,陈文华,马鹏,等.水压致裂法地应力测试在水电工程中的应用[J].长江科学院院报,2013,30(11):77-82.
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[8]沈传波,梅廉夫,徐振平,等.四川盆地复合盆山体系的结构构造和演化[J].大地构造与成矿学,2007,31(3):288-299.
[2]刘泉声,刘恺德.淮南矿区深部地应力场特征研究[J].岩土力学,2012,33(7):89-96.
[3]马鹏,赵国平,张永永,等.锦屏超高压岩体水压致裂法地应力测试系统研制与应用[J].长江科学院院报,2012,29(8):58-61,66.
[4]余云燕,李国良,赵德安,等.两水隧道地应力测量及三维地应力场多元回归分析[J].现代隧道技术,2016,53(4):29-36.
[5]赵国平,陈文华,马鹏,等.水压致裂法地应力测试在水电工程中的应用[J].长江科学院院报,2013,30(11):77-82.
[6]景锋,梁合成,边智华,等.地应力测量方法研究综述[J].华北水利水电学院学报,2008,29(2):71-75.
[7]孙义.地应力及其在采矿工程中的应用综述[J].西部探矿工程,2017,29(7):127-129,134.
[8]沈传波,梅廉夫,徐振平,等.四川盆地复合盆山体系的结构构造和演化[J].大地构造与成矿学,2007,31(3):288-299.