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隧道与地下工程灾害防治  2021, Vol. 3 Issue (2): 23-32    DOI: 10.19952/j.cnki.2096-5052.2021.02.03
  黄土隧道及地下工程建造新理论与新技术专题 本期目录 | 过刊浏览 | 高级检索 |
富水深埋黄土隧道变形规律及控制措施
刘晓杰1,梁庆国1*,刘传新2,张堂杰2,王文卓1
1.兰州交通大学土木工程学院, 甘肃 兰州 730070;2. 苏交科集团股份有限公司, 江苏 南京 210000)
Deformation laws and control measures of deep-buried loess tunnel with abundant water
LIU Xiaojie1, LIANG Qingguo1*, LIU Chuanxin2, ZHANG Tangjie2, WANG Wenzhuo1
1. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China;
2. JSTI Group Co., Ltd., Nanjing 210000, Jiangsu, China
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摘要 以某在建富水黄土公路隧道为依托,对隧道的拱顶下沉和周边收敛进行现场监测。结合现场监测数据对围岩变形的原因进行分析,并提出相应的控制措施。结果表明:深埋富水黄土隧道拱顶沉降比周边收敛量大,围岩变形受降雨的影响较大,且变形稳定时间约为35 d;围岩的变形大致可分为变形快速发展、变形持续发展、变形稳定3个阶段;拱顶下沉及周边水平收敛随上、中、下台阶的开挖变化较大,每个施工步完成后应及时施作锁脚锚杆等支护措施,仰拱闭合可以有效控制围岩变形;围岩变形与指数函数规律吻合,可利用指数函数模型预测;建议在富水黄土隧道施工中采用拱脚钢管桩与帷幕注浆来有效控制渗漏水及围岩大变形。
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刘晓杰
梁庆国
刘传新
张堂杰
王文卓
关键词:  富水深埋黄土隧道  现场测试  变形规律  原因分析  控制措施    
Abstract: Based on a highway tunnel in loess with high water content under construction, the crown settlement and horizontal convergence of the tunnel were monitored and discussed, the causes of tunnel deformation were analyzed, and the corresponding control measures were proposed. The crown settlement was larger than the horizontal convergence of tunnel. The tunnel deformation was greatly affected by rainfall, and its stability time was basically 35 d. The tunnel deformation was roughly divided into three stages: the rapid development stage, the continuous development stage, and the stable stage. With the excavation of the upper, middle, and lower benches, the crown settlement and horizontal convergence of tunnel changed greatly. After each construction step was completed, the supporting measures such as lock-foot anchor were taken in time. Early closing of the invert could effectively control the tunnel deformation. The tunnel deformation was consistent with the exponential function rule and could be predicted by the law of exponential function. It was recommended to use arch-foot steel pipe piles and curtain grouting in the construction of water-rich loess tunnels to effectively control water leakage and large deformation of surrounding rocks.
Key words:  deep-buried loess tunnel with rich water    field test    deformation law    cause analysis    control measures
收稿日期:  2021-04-07      修回日期:  2021-05-21      发布日期:  2021-06-20     
中图分类号:  U25  
基金资助: 国家自然科学基金资助项目(51968041);兰州交通大学“百名青年优秀人才培养计划”资助项目(2017150)
作者简介:  刘晓杰(1995— ),男,河南登封人,硕士研究生,主要研究方向为隧道与地下工程. E-mail:337135975@qq.com. *通信作者简介:梁庆国(1976— ),男,甘肃临洮人,博士,教授,博导,主要研究方向为岩土与地下工程. E-mail:lqg_39@163.com
引用本文:    
刘晓杰, 梁庆国, 刘传新, 张堂杰, 王文卓. 富水深埋黄土隧道变形规律及控制措施[J]. 隧道与地下工程灾害防治, 2021, 3(2): 23-32.
LIU Xiaojie, LIANG Qingguo, LIU Chuanxin, ZHANG Tangjie, WANG Wenzhuo. Deformation laws and control measures of deep-buried loess tunnel with abundant water. Hazard Control in Tunnelling and Underground Engineering, 2021, 3(2): 23-32.
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http://tunnel.sdujournals.com/CN/Y2021/V3/I2/23
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