河北水利电力学院学报

河北水利电力学院学报 ›› 2022, Vol. 32 ›› Issue (1): 34-39+46.DOI: 10.16046/j.cnki.issn2096-5680.2022.01.006

• 岩土工程专题 • 上一篇    下一篇

典型膨胀岩区铁路隧道基底上拱致害机理及治理措施的仿真分析

侯彬1,王越2,杜林2   

  1. 1.石家庄铁道大学  交通运输学院，河北省石家庄市北二环东路17号 050043；
    2.中国铁路青藏集团有限公司，青海省西宁市建国路22号 810007
  • 收稿日期:2021-06-28 修回日期:2021-09-07 出版日期:2022-03-31 发布日期:2022-06-23
  • 作者简介:侯彬（1997-），男，河北石家庄人，石家庄铁道大学在读硕士研究生，研究方向为铁道工程设计与管理方向。E-mail：houbin@stdu.edu.cn
  • 基金资助:
    河北省研究生创新项目(YC2021056);; 省部共建交通工程结构力学行为与系统安全国家重点实验室自主课题项目(50110010325)

Simulation Analysis of the Damage Mechanism and Treatment Measures of the Base Arch of a Typical Swelling Rock Railway Tunnel

HOU Bin1,WANG Yue2,DU Lin2   

  1. 1.School of Traffic and Transportation, Shijiazhuang Tiedao University, 050043 , Shijiazhuang, Hebei,China ;  2.China Railway Qinghai-Tibet Group Co., Ltd., 810007, Xining, Qinghai, China 
  • Received:2021-06-28 Revised:2021-09-07 Online:2022-03-31 Published:2022-06-23

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摘要： 以某客运专线高速铁路在线路运营期间出现多处隧道基底上拱现象为背景，研究隧道基底上拱成因机理，采用数值模拟的研究方法对围岩强度衰减、仰拱厚度和仰拱矢跨比3个因素开展3因素3水平正交试验，使用极差分析法对模型试验结果进行数据分析得到影响铁路隧道产生基底上拱现象的主要因素和次要因素，并对采用改善仰拱结构和对仰拱进行锚杆加固2种治理措施后的治理效果进行了模拟。研究结果表明：影响上拱现象产生的主要因素和次要因素分别是围岩强度变化和仰拱厚度，模拟结果显示仰拱厚度和仰拱矢跨比的增加可以有效减少上拱变化的产生，且在进行锚杆注浆治理后，隧道基底受力变化有明显改善，验证了该病害治理方案的可行性。


关键词:  铁路隧道, 基底上拱, 机理分析, 病害治理

Abstract: Taking a high-speed railway of a passenger dedicated line as the background, there are multiple tunnel base arching phenomena during the operation of the line, the cause mechanism of tunnel base arching is studied. Numerical simulation methods are used to study the strength attenuation of surrounding rock, the thickness of inverted arch and the ratio of inverted arch to span. The three-factor three-level orthogonal test was carried out by using the range analysis method to analyze the data of the model test results to obtain the main and secondary factors affecting the arching phenomenon of the railway tunnel’s basement. The improvement of the invert structure and the anchor bolt injection were adopted to simulate the treatment effect after the two treatment measures. The research results show that the main and secondary factors affecting the up arching phenomenon are the changes in the strength of the surrounding rock and the thickness of the inverted arch. The simulation results show that the increase in the thickness of the inverted arch and the rise-span ratio of the inverted arch can effectively reduce the occurrence of changes in the up arch, and After the bolt grouting treatment was carried out, the force change of the tunnel base was significantly improved, which verified the feasibility of the disease treatment plan.

Key words: railway tunnel, base arch, mechanism analysis, disease treatment

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