天山胜利隧道穿越博-阿断裂段抗错断性能研究

刘继国; 崔庆龙; 舒恒; 彭文波; 吉瀚文

doi:10.11899/zzfy20230204

天山胜利隧道穿越博-阿断裂段抗错断性能研究

doi: 10.11899/zzfy20230204

1.
中交第二公路勘察设计研究院有限公司, 武汉 430056
2.
华中科技大学，土木与水利工程学院, 武汉 430074

基金项目: 新疆维吾尔自治区重大科技专项项目（2020A03003-3）

详细信息

作者简介:
刘继国，男，生于1976年。正高级工程师。主要从事隧道与地下工程科研与设计工作。E-mail：liujiguogg@163.com

通讯作者:
吉瀚文，男，生于1997年。博士研究生。主要从事地下空间结构防灾研究。E-mail：3213254366@qq.com

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出版历程
- 收稿日期: 2023-03-02
- 刊出日期: 2023-06-30

Study on the Anti-dislocation Performance of Tianshan Shengli Tunnel Crossing Bo-A Fault Section

1.
China Communications Construction Company Second Highway Consultants Limited Company, Wuhan 430056, China
2.
School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

摘要

摘要: 目前针对超挖、铰接与减震层组合设计对走滑断层隧道抗错断损伤特征的研究尚不明确，为此以天山胜利隧道穿越博罗科努-阿其克库都克断裂为实际工程背景，采用可表征泡沫混凝土力学行为的塑性本构模型模拟减震层泡沫混凝土受压行为，建立精细化三维数值模型，评估隧道在超挖、铰接与减震层组合设计工况下的纵向位移、衬砌断面损伤和应力分布特征，得出采用超挖、铰接与减震层组合设计时的走滑断层隧道力学响应及破坏特征。研究结果表明，隧道受断层活动影响呈现S形变形，在断层滑动面附近隧道变形较大；走滑断层作用下衬砌损伤集中在拱腰及45°共轭方向，衬砌内力随着断层错动量的增加而增大；通过超挖、铰接与减震层的组合设计，能够较好地减轻隧道二次衬砌破坏。
- 隧道 /
- 活断层 /
- 抗错断 /
- 减震层 /
- 柔性铰接 /
- 泡沫混凝土
Abstract: The research on the characteristics of anti-dislocation damage of the strike-slip fault tunnel for the combination design of overbreak, hinge and damping layer is still unclear. Therefore, taking the tunnel crossing the Tianshan Bo-A fault zone as the research object, the plastic constitutive model that can characterize the mechanical behavior of foam concrete is used to simulate the compression behavior of foam concrete in the damping layer, and a refined three-dimensional numerical model is established to evaluate the longitudinal displacement deformation, lining section damage and stress distribution characteristics under the combined design conditions of hinge and damping layer, and the mechanical response and failure characteristics of overbreak, combined design of hinge and damping layer on strike-slip fault tunnel are obtained. The results show that: 1) The tunnel shows "S" shape deformation under the influence of fault activity, and the tunnel deformation is large near the fault sliding surface; 2) The damage of lining under the action of strike-slip fault is concentrated in the arch waist and 45° conjugate direction, and the internal force of lining increases with the increase of fault dislocation; 3) The combined design of overbreak, hinge and damping layer can effectively reduce the damage of secondary lining.
- Tunnel /
- Active fault /
- Anti faulting /
- Shock absorption layer /
- Flexible articulation /
- Foam concrete

HTML全文

图 1 天山胜利隧道穿越博-阿断裂地质剖面

Figure 1. Geological profile of Tianshan tunnel crossing Bolokenu-Aqikekuduke fault

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图 2 超挖段隧道结构

Figure 2. Tunnel structure diagram of overbreak sections

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图 3 柔性铰接设计结构

Figure 3. Structural diagram of flexible hinge design

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图 4 核心段S-DZ1隧道横断面

Figure 4. Cross section of core section S-DZ1

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图 5 数值分析流程

Figure 5. Numerical analysis process

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图 6 三维数值分析模型

Figure 6. 3D Numerical analysis model

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图 7 监测点布置

Figure 7. Monitoring point

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图 8 泡沫混凝土应力-应变曲线

Figure 8. Stress-strain curve of foam concrete

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图 9 隧道位移曲线

Figure 9. Displacement curve

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图 10 刚度损伤因子曲线

Figure 10. Scalar stiffness degradation curve

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图 11 损伤分布曲线

Figure 11. Damage distribution curve

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图 12 Mises应力分布

Figure 12. Mises stress distribution diagram

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图 13 不同工况下隧道衬砌损伤对比云图

Figure 13. Damage comparison

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表 1 围岩力学参数

Table 1. Rock mechanics parameters

围岩类型	密度/（kg·m⁻³）	弹性模量/GPa	泊松比	摩擦角/（°）	黏聚力/MPa
断层破碎带	2790	1.2	0.35	27	0.2
围岩	2790	5.5	0.30	39	0.65

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表 2 钢筋与混凝土参数

Table 2. Steel and concrete parameters

材料类型	密度/（kg·m⁻³）	弹性模量/GPa	泊松比	抗拉强度/MPa	抗压强度/MPa
C25	2 300	28.0	0.200	1.78	16.70
C40	2 300	32.5	0.200	2.39	26.80
泡沫混凝土	350	0.3	0.250	0.25	1.83
HRB400钢筋	7 850	200.0	0.167	300.00	—

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