周亚东, 张彬, 耿招, 陈大伟, 罗俐, 苏海峰. 2019: 基于Hoek-Brown强度准则的隧道软弱围岩稳定性分析. 工程地质学报, 27(5): 980-988. DOI: 10.13544/j.cnki.jeg.2019131
    引用本文: 周亚东, 张彬, 耿招, 陈大伟, 罗俐, 苏海峰. 2019: 基于Hoek-Brown强度准则的隧道软弱围岩稳定性分析. 工程地质学报, 27(5): 980-988. DOI: 10.13544/j.cnki.jeg.2019131
    ZHOU Yadong, ZHANG Bin, GENG Zhao, CHEN Dawei, LUO Li, SU Haifeng. 2019: STABILITY ANALYSIS OF SOFT ROCK SURROUNDING TUNNEL BASED ON HOEK-BROWN STRENGTH CRITERION. JOURNAL OF ENGINEERING GEOLOGY, 27(5): 980-988. DOI: 10.13544/j.cnki.jeg.2019131
    Citation: ZHOU Yadong, ZHANG Bin, GENG Zhao, CHEN Dawei, LUO Li, SU Haifeng. 2019: STABILITY ANALYSIS OF SOFT ROCK SURROUNDING TUNNEL BASED ON HOEK-BROWN STRENGTH CRITERION. JOURNAL OF ENGINEERING GEOLOGY, 27(5): 980-988. DOI: 10.13544/j.cnki.jeg.2019131

    基于Hoek-Brown强度准则的隧道软弱围岩稳定性分析

    STABILITY ANALYSIS OF SOFT ROCK SURROUNDING TUNNEL BASED ON HOEK-BROWN STRENGTH CRITERION

    • 摘要: 因长期遭受地质作用和构造力的改造作用,地下岩体中存在大量的软弱破碎带,隧道开挖穿越这一地带很容易出现较大的变形,甚至出现塌方等事故。论文采用TGP超前地质预报与掌子面围岩调查相结合的方法进行隧道掌子面及前方未开挖岩体的精细化地质调查,获取了隧道围岩的Hoek-Brown参数。采用FLAC3D数值模拟方法,分析了破碎带围岩在既定支护条件下的稳定性,并与现场监测数据进行对比,验证此方法的正确性。研究结果表明,数值模拟结果与实际监测结果较为吻合,可以将此方法用于指导未开挖段隧道的稳定性预测,以确保隧道掘进过程的施工安全。

       

      Abstract: Due to the long-term geological and structural forces, there are a large number of weak fracture zones in the underground rock mass. Tunnel excavation through this area is prone to large deformations and even accidents such as landslides. This paper uses the method of TGP advanced geological prediction combining with the investigation of the surrounding rock of the face. It carries out the detailed geological survey of the undisturbed rock mass in the tunnel face and the front. It obtains the Hoek-Brown parameters of the rock surrounding the tunnel. The paper uses the FLAC3D numerical simulation method to analyze the stability of surrounding rock in the crushing zone under the given supporting conditions. It compares the numerical results with the field monitoring data to verify the correctness of this method. The results show that the numerical simulation results are in good agreement with the actual monitoring results. We can use this method to guide the stability prediction of unexcavated tunnels to ensure the construction safety of the tunneling process.

       

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