Volume 21 Issue 2
Aug.  2021
Turn off MathJax
Article Contents
Article Navigation >  Journal of Traffic and Transportation Engineering  > 2021  >  21(2): 93-106
Next Previous
CHEN Jian-xun, CHEN Li-jun, LUO Yan-bin, WANG Chuan-wu, LIU Wei-wei. Mechanism and control method of large deformation for large-span chlorite schist tunnel[J]. Journal of Traffic and Transportation Engineering, 2021, 21(2): 93-106. doi: 10.19818/j.cnki.1671-1637.2021.02.008
Citation: CHEN Jian-xun, CHEN Li-jun, LUO Yan-bin, WANG Chuan-wu, LIU Wei-wei. Mechanism and control method of large deformation for large-span chlorite schist tunnel[J]. Journal of Traffic and Transportation Engineering, 2021, 21(2): 93-106. doi: 10.19818/j.cnki.1671-1637.2021.02.008
shu

Mechanism and control method of large deformation for large-span chlorite schist tunnel

doi: 10.19818/j.cnki.1671-1637.2021.02.008

  • School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China

Funds:

National Natural Science Foundation of China 41831286

National Natural Science Foundation of China 51808049

More Information
  • Author Bio:

    CHEN Jian-xun(1969-), male, professor, PhD, chenjx1969@gfscw.cn

  • Corresponding author: CHEN Li-jun(1986), male, lecturer, PhD, chenlijun2004@126.com
  • Received Date: 2021-03-25
  • Publish Date: 2021-04-25
    Abstract
  • Based on the field test of deformations and stresses of supporting structures in the Lianchengshan Tunnel of Baoji-Hanzhong Expressway (double-hole six-lane), the characteristics and mechanism of large deformation disasters of large-span chlorite schist tunnels were analyzed, the comprehensive control method of large deformation disasters of the tunnel was summarized, the classification standard of large deformation of large-span chlorite schist tunnel was established, and the corresponding support parameters of each deformation grade were proposed. Analysis result shows that the large-span chlorite schist tunnel mainly has the settlement deformation during the tunnel excavation, which is mainly manifested as the overall settlement of the primary support. After the primary support is closed, the tunnel deformation is mainly manifested by the extrusion deformation of the side wall and the bottom heave of tunnel invert caused by the settlement of tunnel foot. The large deformation disasters are mainly as follows: the instability and collapse of tunnel face, primary support invasion and failure, the unsoldering and failure of feet-lock pipe, the cracking of secondary lining, the sinking of side wall, and the uplift and cracking of invert backfill. The chlorite schist is extremely weak and broken, and the invert base is softened by water, which are the fundamental causes of large deformation disaster of the tunnel. The large span of tunnel excavation (the maximum excavation span is 19.6 m), the flat tunnel section, and the lack of bearing capacity and effective restraint for arch foot foundation aggravate the deformation intrusion and instability failure of tunnel structure. The limited bearing capacity of primary support, causing loads to be continuously transmitted to the secondary lining, is the direct cause of the cracking of secondary lining. The deformation mechanism of surrounding rock can be summarized as the continuous downward slipping and loosening mechanism caused by the difficulty of the cohesion of arch rock mass in overcoming its own weight, and the plastic flow mechanism of soft rock caused by the low-strength stress ratio at the tunnel foot and invert. The large deformation disaster of the tunnel can be effectively avoided by adopting the comprehensive control method of "three-step core soil method+large reservation deformation+double-layer HK200b steel frame+large-diameter feet-lock pipe+radial grouting of surrounding rock+deepening tunnel invert", and managing the large deformation hierarchically at the same time. 5 tabs, 18 figs, 32 refs.

     

    • FullText(HTML)
  • loading
    • References(32)
  • [1]
    ZHOU Hui, LI Zhen, ZHANG Chuan-qing, et al. Experimental Study of chlorite schist under water-rock action[C]//Yalong River Basin Hydropower Development Co., Ltd. Proceedings of the 2014 Annual Academic Conference of Yalong River Virtual Research Center. Chengdu: Yalong River Basin Hydropower Development Co., Ltd., 2014: 152-159. (in Chinese)
    [2]
    LIU Ning, ZHANG Chuan-qing, CHU Wei-jiang, et al. Deformation behavior and stability analysis of deep chlorite schist[J]. Chinese Journal of Rock Mechanics and Engineering, 2013, 32(10): 2045-2052. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201310014.htm
    [3]
    WU Zhong-ming, SHEN Ya-xing, LI Shu-lin, et al. Data analysis on chlorite schist tunnel section of the diversion tunnel No. 1 of Jinping Ⅱ Hydropower Station[J]. Dam and Safety, 2014(4): 37-42, 48. (in Chinese) doi: 10.3969/j.issn.1671-1092.2014.04.007
    [4]
    ZHOU Chun-hong. Deformation characteristics of chlorite schist tunnel section under deep buried condition[J]. Bulletin of Science and Technology, 2015, 31(3): 108-111. (in Chinese) doi: 10.3969/j.issn.1001-7119.2015.03.026
    [5]
    ZHANG Chuan-qing, CUI Guo-jian, ZHANG Yang, et al. Squeezing deformation control during bench excavation for the Jinping deep soft-rock tunnel[J]. Engineering Failure Analysis, 2020, 116: 104761. doi: 10.1016/j.engfailanal.2020.104761
    [6]
    ZHOU Hui, ZHANG Chuan-qing, LI Zhen, et al. Analysis of mechanical behavior of soft rocks and stability control in deep tunnels[J]. Journal of Rock Mechanics and Geotechnical Engineering, 2014, 6(3): 219-226. doi: 10.1016/j.jrmge.2014.03.003
    [7]
    YANG Fan-jie, ZHANG Chuan-qing, ZHOU Hui, et al. The long-term safety of a deeply buried soft rock tunnel lining under inside-to-outside seepage conditions[J]. Tunnelling and Underground Space Technology, 2017, 67: 132-146. doi: 10.1016/j.tust.2017.05.004
    [8]
    LI Zhen, ZHOU Hui, SONG Yu-ze, et al. Mechanical model of chlorite schist considering hardening-softening and dilatancy characteristics[J]. Rock and Soil Mechanics, 2013, 34(2): 404-410. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201302017.htm
    [9]
    LI Zhen, LIU Shang-ge, YU Jian-xin, et al. Study on mechanical model of chlorite schist considering elastoplastic damage coupling[J]. Chinese Journal of Underground Space and Engineering, 2017, 13(1): 101-107. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-BASE201701015.htm
    [10]
    YU De-hai, PENG Jian-bing. Experimental study of mechanical properties of chlorite schist with water under triaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(1): 205-211. (in Chinese) doi: 10.3321/j.issn:1000-6915.2009.01.027
    [11]
    GOEL R K, JETHWA J L, PAITHANKAR A G. Tunnelling through the young Himalayas—a case history of the Maneri-Uttarkashi Power Tunnel[J]. Engineering Geology, 1995, 39(1): 31-44. http://www.sciencedirect.com/science/article/pii/001379529400002J
    [12]
    XU Ze-min, HUANG Run-qiu, ZHANG Zhuo-yuan, et al. Soft rocks flowing toward deep tunnel[J]. Journal of Railway Engineering Society, 2000(2): 73-76. (in Chinese) doi: 10.3969/j.issn.1006-2106.2000.02.018
    [13]
    GAO Mei-ben, LI Tian-bin, MENG Lu-bo, et al. Large deformation of soft rock tunnel large deformation mechanics and prevention measures[J]. Construction Technology, 2013, 42(S): 247-251. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-SGJS2013S2072.htm
    [14]
    LI Lei, TAN Zhong-sheng. Characteristic and mechanism research for large deformation problem in squeezing-shattered soft rock tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2018, 37(S1): 3593-3603. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2018S1051.htm
    [15]
    YANG Jin-zhong, YANG Pei-zhou, ZENG Xiong-hui, et al. Technology for treatment of chlorite schist section in No. 1 diversion tunnel of Jinping Ⅱ Hydropower Station and its application[J]. Water Resources and Hydropower Engineering, 2015, 46(4): 87-92. (in Chinese) doi: 10.3969/j.issn.1000-0860.2015.04.020
    [16]
    WANG Xiao-lin, HUANG Yan-bo. Comparison of large deformation control technologies for soft rock tunnel with high ground stress between China and foreign countries: a case study of Muzhailing Tunnel on Lanzhou-Chongqing Railway in China and Saint Gotthard Base Tunnel in Switzerland[J]. Tunnel Construction, 2018, 38(10): 1621-1629. (in Chinese) doi: 10.3973/j.issn.2096-4498.2018.10.004
    [17]
    GUAN Bao-shu. Deformation of tunnels with soft surrounding rocks and its control[J]. Tunnel Construction, 2011, 31(1): 1-17. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-JSSD201101002.htm
    [18]
    ZHANG Cong, YANG Jun-sheng, XIE Yi-peng, et al. Distribution characteristics of grouting reinforcement ring for tunnel with heterogeneous weak surrounding rock[J]. Journal of Traffic and Transportation Engineering, 2019, 19(3): 58-70. (in Chinese) doi: 10.3969/j.issn.1671-1637.2019.03.007
    [19]
    YU Tian-ci. Study on large deformation control technology of tunnel in soft rock[J]. China Civil Engineering Journal, 2017, 50(S2): 112-117. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-TMGC2017S2018.htm
    [20]
    TAO Zhi-gang, LUO Sen-lin, LI Meng-nan, et al. Optimization of large deformation control parameters of layered slate tunnels based on numerical simulation and field test[J]. Chinese Journal of Rock Mechanics and Engineering, 2020, 39(3): 491-506. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX202003006.htm
    [21]
    CHEN Jian-xun, LUO Yan-bin. The stability of structure and its control technology for large-span loess tunnel[J]. Hazard Control in Tunnelling and Underground Engineering, 2019, 1(1): 93-101. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-SDZH201901011.htm
    [22]
    LIU Xue-zeng, LUO Ren-li. Analysis of large-span highway tunnel surrounding rock vertical pressure attributes[J]. Journal of Tongji University (Natural Science), 2010, 38(12): 1741-1745. (in Chinese) doi: 10.3969/j.issn.0253-374x.2010.12.005
    [23]
    QU Hai-feng, ZHU He-hua, CAI Yong-chang. Discussion on calculation of loose load on extra-large cross-section and large-span road tunnel[J]. Rock and Soil Mechanics, 2008, 29(4): 989-994, 1000. (in Chinese) doi: 10.3969/j.issn.1000-7598.2008.04.025
    [24]
    DUAN Hui-ling, ZHANG Lin. Comparative study of rational excavation methods for large-span highway tunnels[J]. China Civil Engineering Journal, 2009, 42(9): 114-119. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-TMGC200909019.htm
    [25]
    DAI Yong-hao, CHEN Wei-zhong, TIAN Hong-ming, et al. Study of large deformation and support measures of Daliang Tunnel with soft surrounding rockmass[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(S2): 4149-4156. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2015S2063.htm
    [26]
    CHEN Zi-quan, HE Chuan, WU Di, et al. Study of large deformation classification criterion for layered soft rock tunnels under high geostress[J]. Journal of Southwest Jiaotong University, 2018, 53(6): 1237-1244. (in Chinese) doi: 10.3969/j.issn.0258-2724.2018.06.020
    [27]
    CHEN Li-jun, ZHANG Yun-liang, MA Zhen-yue, et al. Joint bearing analysis for feet-lock bolt and steel arch in weak rock tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(1): 129-138. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201501014.htm
    [28]
    LUO Yan-bin, CHEN Jian-xun. Mechanical characteristics and mechanical calculation model of tunnel feet-lock bolt in weak surrounding rock[J]. Chinese Journal of Geotechnical Engineering, 2013, 35(8): 1519-1525. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-YTGC201308021.htm
    [29]
    CHEN Li-jun, ZHANG Yun-liang, MA Zhen-yue. Analytical approach for support mechanism of feet-lock pipe combined with steel frame in weak rock tunnels[J]. KSCE Journal of Civil Engineering, 2016, 20(7): 2965-2980. doi: 10.1007/s12205-016-0443-3
    [30]
    CHEN Li-jun, CHEN Jian-xun, LUO Yn-bin, et al. Vertical load and settlement at the foot of steel rib with the support of feet-lock pipe in soft ground tunnel[J]. Advances in Civil Engineering, 2019, 2019: 6186748. http://www.researchgate.net/publication/330853288_Vertical_Load_and_Settlement_at_the_Foot_of_Steel_Rib_with_the_Support_of_Feet-Lock_Pipe_in_Soft_Ground_Tunnel
    [31]
    HØIEN A H, NILSEN B. Rock mass grouting in the løren tunnel: case study with the main focus on the grout ability and feasibility of drill parameter interpretation[J]. Rock Mechanics and Rock Engineering, 2014, 47(3): 967-983.
    [32]
    WANG Qian, QU Li-qing, GUO Hong-yu, et al. Grouting reinforcement technique of Qingdao Jiaozhou Bay Subsea Tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(4): 790-802. (in Chinese) http://www.cnki.com.cn/Article/CJFDTOTAL-YSLX201104019.htm
    • Relative Articles
    • Supplements(0)
    • Cited By

Catalog

    Get Citation
    PDF
    XML

    Article Metrics

    Article views (2758) PDF downloads(191) Cited by()
    Related

    Website copyright Journal of Traffic and Transportation Engineering Editorial Department陕ICP备05001904号-1

    Address ：Editorial Department of Journal of Traffic and Transportation Engineering, Chang'an University, Middle Section of South 2nd Ring Road, Xi'an, China（710064） Tel：029-82334388 Email：jygc@gfscw.cn

    All visit:Today's visit:

    Supported by: Beijing Renhe Information Technology Co. Ltd    

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return