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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

40卷

期数:

2023年05期

页码:

162-173

栏目:

隧道工程

出版日期:

2023-09-15

文章信息/Info

Title:

Stability analysis of surrounding rock of tunnel passing through different fault fracture zones

文章编号:

1673-2049(2023)05-0162-12

作者:

韩瑀萱¹,江腾飞²,谭碧舸³,谢 远⁴,赖金星²,邱军领²

(1. 四川省轨道交通投资有限责任公司,四川 成都 610023; 2. 长安大学 公路学院,陕西 西安 710064; 3. 四川都金山地轨道交通有限责任公司,四川 成都 611830;4. 中铁第一勘察设计院集团有限公司,陕西 西安 710043)

Author(s):

HAN Yuxuan¹, JIANG Tengfei², TAN Bige³, XIE Yuan⁴, LAI Jinxing², QIU Junling²

(1. Sichuan Rail Transit Investment Co., Ltd, Chengdu 610023, Sichuan, China; 2. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 3. Sichuan Dujin Mountain Rail Transit Co., Ltd, Chengdu 611830, Sichuan, China; 4. China Railway First Survey and Design Institute Group Co., Ltd., Xi'an 710043, Shaanxi, China)

关键词:

断层破碎带;  围岩稳定性;  数值模拟;  倾角;  厚度;  倾向

Keywords:

fault fracture zone;  stability of surrounding rock;  numerical simulation;  dip angle;  thickness;  tendency

分类号:

U451.2

DOI:

10.19815/j.jace.2021.12094

文献标志码:

A

摘要:

为分析隧道穿越不同形态断层破碎带对围岩稳定性的影响,以绵九高速五里坡隧道工程为依托,采用ANSYS Workbench参数化建模平台及FLAC 3D有限差分软件模拟分析了隧道穿越不同倾角、厚度和倾向断层形态对隧道围岩稳定性的影响。在建模过程中,通过控制变量法分别改变断层倾角、厚度、倾向来研究单一变量的影响。结果表明:隧道穿越不同形态断层时,围岩竖向变形、水平收敛、塑性区分布以及围岩与初期支护间接触压力均会受到影响; 在一定范围内,断层倾角、厚度的变化对围岩稳定性影响较大,断层倾角越大,越有利于围岩稳定,断层厚度影响则正好相反,而断层倾向在0°～45°之间变化时基本无影响; 各因素对拱顶沉降的影响程度由大到小依次为断层厚度、断层倾角、断层倾向,而对于边墙水平位移,断层倾角影响最大,断层厚度次之,断层倾向基本无影响; 在施工中,应尽量让隧道与断层正交或避免隧道穿越层厚度大的断层来提高围岩稳定性,研究结果对类似工程具有一定的借鉴和指导意义。

Abstract:

In order to analyze the influence of the tunnel passing through different fault fracture zones on the stability of surrounding rock, based on the Wulipo tunnel project of Mianjiu expressway, the influence of the tunnel passing through different dip angle, thicknesses and tendency patterns on the stability of tunnel surrounding rock was simulated and analyzed by using ANSYS Workbench parametric modeling platform and FLAC 3D finite difference software. In the process of modeling, the control variable method was used to study the influence of the single variable by changing the fault dip angle, thickness and tendency respectively. The results show that when the tunnel passes through different forms of faults, the vertical deformation, horizontal convergence, plastic zone distribution of surrounding rock and the contact pressure between surrounding rock and initial support will be affected. In a certain range, the change of fault dip angle and thickness has a great impact on the stability of surrounding rock. The greater the dip angle, the more conducive to the stability of surrounding rock, and the influence of fault thickness is just the opposite. When the fault dip tendency changes between 0 °-45 °, it has little effect. The influence degree of each factor on the vault settlement from large to small is fault thickness, fault dip angle and fault tendency. For the horizontal displacement of the side wall, the fault dip angle has the greatest influence, followed by the fault thickness, and the fault tendency has little effect. During construction, the tunnel should be orthogonal to the fault as much as possible or avoid the fault with large thickness to improve the stability of surrounding rock. The research results have certain reference and guiding significance for similar projects.

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相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2021-12-03
基金项目:中央高校基本科研业务费专项资金-长安大学优秀博士学位论文培育资助项目(300102212703); 四川都金山地轨道交通有限责任公司项目(2020-1)
作者简介:韩瑀萱(1971-),男,高级工程师,E-mail:qiliang_1208@126.com。
通信作者:邱军领(1989-),男,工学博士,讲师,硕士生导师,E-mail:870133597@qq.com。

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更新日期/Last Update: 2023-09-01