| 引用本文: | 傅鹤林,安鹏涛,伍毅敏,李鲒,陈龙.富水裂隙围岩隧道涌水量计算方法与规律分析[J].哈尔滨工业大学学报,2024,56(3):110.DOI:10.11918/202112018 |
| FU Helin,AN Pengtao,WU Yimin,LI Jie,CHEN Long.Calculation method and law analysis of water inflow in tunnel under water-rich fissure surrounding rock[J].Journal of Harbin Institute of Technology,2024,56(3):110.DOI:10.11918/202112018 |
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| 富水裂隙围岩隧道涌水量计算方法与规律分析 |
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傅鹤林1,2,安鹏涛1,2,伍毅敏1,2,李鲒1,2,陈龙1,2
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(1.中南大学 土木工程学院,长沙 410075;2.高速铁路建造技术国家工程实验室(中南大学),长沙 410075)
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| 摘要: |
| 富水裂隙区隧道涌水量预测精度较差,涌水问题尚未得到较好的解决。针对此问题,视裂隙围岩及注浆区为非均质各向异性介质,初期支护及二次支护结构为均质各向同性介质,构建了裂隙围岩下隧道涌水简化计算模型,基于地下水力学理论及流体质量守恒定律推导了富水裂隙区隧道涌水量计算公式。通过退化分析及案例工程现场实测数据验证了构建富水裂隙区隧道涌水简化计算模型的合理性及涌水量计算式求解的正确性,最后基于解析解揭示了各特征参数对富水裂隙区隧道涌水的影响规律,探讨了富水裂隙区隧道涌水机制。结果表明:理论计算值与现场实测值最大相对误差为8.1%,验证了构建模型的合理性及公式推导的正确性；隧道涌水量随裂隙最大宽度的增加而增大,受堵水结构的联合制约,两者近似呈线性关系；注浆区厚度与隧道半径比值在2倍以内时,隧道涌水量受注浆区厚度的影响显著；富水裂隙区隧道涌水受裂隙分布规律及支护结构的制约,应重视对裂隙分布的调查。 |
| 关键词: 富水裂隙 涌水量 注浆加固 涌水灾害 支护结构 |
| DOI：10.11918/202112018 |
| 分类号:U459.2 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51978668);广东省交通运输厅课题(DFH(201904)YS1-001) |
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| Calculation method and law analysis of water inflow in tunnel under water-rich fissure surrounding rock |
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FU Helin1,2,AN Pengtao1,2,WU Yimin1,2,LI Jie1,2,CHEN Long1,2
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(1.School of Civil Engineering, Central South University, Changsha 410075, China;2. National Engineering Laboratory for Construction Technology of High Speed Railway (Central South University),Changsha 410075, China)
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| Abstract: |
| The prediction accuracy of tunnel water inflow in water rich fracture area is poor, and the problem of water inflow has not been well solved. To solve this problem, considering the fractured surrounding rock and grouting area as heterogeneous and anisotropic media, and the initial support and secondary support structures as homogeneous and isotropic media, a simplified calculation model of tunnel water inflow under fractured surrounding rock is constructed. The calculation formula of tunnel water inflow in water rich fractured area is deduced based on the theory of underground hydraulics and the law of fluid mass conservation. Through the degradation analysis and the field measured data of the case project, the rationality of constructing the simplified calculation model of tunnel water inflow in the water rich fissure area and the correctness of the solution of the calculation formula of water inflow are verified. Finally, based on the analytical solution, the influence law of each characteristic parameter on the tunnel water inflow in the water rich fissure area is revealed, and the water inflow mechanism of the tunnel in the water rich fissure area is discussed. The research shows that the maximum error between the theoretical calculated value and the field measured value is 8.1%, which verifies the rationality of the model and the correctness of the formula derivation. The water inflow of the tunnel increases with the increase of the maximum width of the crack, which is approximately linear due to the joint restriction of the water shutoff structure. When the ratio of grouting area thickness to tunnel radius is less than 2 times, the tunnel water inflow is significantly affected by the thickness of grouting area. The water inflow of tunnel in water rich fracture area is restricted by the fracture distribution law and support structure, so we should pay attention to the investigation of fracture distribution. |
| Key words: water rich fissure water inflow grouting reinforcement water inrush disaster supporting structure |
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