Experimental study on clogging of cutterhead for panel earth-pressure-balance shield tunneling in cohesive strata

FANG Yong; WANG Kai; TAO Li-ming; LIU Peng-cheng; DENG Ru-yong

doi:10.11779/CJGE202009009

Volume 42 Issue 9

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Chinese Journal of Geotechnical Engineering > 2020 > 42(9): 1651-1658. > DOI: 10.11779/CJGE202009009

FANG Yong, WANG Kai, TAO Li-ming, LIU Peng-cheng, DENG Ru-yong. Experimental study on clogging of cutterhead for panel earth-pressure-balance shield tunneling in cohesive strata[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(9): 1651-1658. DOI: 10.11779/CJGE202009009

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Experimental study on clogging of cutterhead for panel earth-pressure-balance shield tunneling in cohesive strata

1.
Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China
2.
Southwest Survey and Design Co., Ltd. of China Railway Siyuan Survey and Design Group Co., Ltd., Kunming 650220, China

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Received Date: December 29, 2019
Available Online: December 07, 2022

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Abstract

Abstract

The panel EPB shield machine is prone to mud cake problems when excavating in clay ground. The cutters will be gradually covered by the mud cake, and the opening of the cutterhead will be clogged. The tunneling efficiency will be reduced and even the shield machine will completely lose its tunneling capacity. Thus, the mud cake poses great influences to shield tunnel construction. The adhesion mechanism between the cutterhead and the soil particles is introduced. The indoor tests are conducted by using the self-made panel cutterhead excavating simulation devices. Changes of cutterhead-driving speed and torque are studied, and the relationship between these parameters and the clogging of cutterhead is revealed. The research results demonstrate that the cutterhead clogging is a gradual process. The soil particles adhere to the cutters first and then gradually expand to form mud cake. The mud cake will cover the cutters and reduce the penetration and block the opening, reducing the efficiency of discharging. The influences of mud cake is mainly reflected in the increase of cutter head torque, the slower tunneling speed and the lowering of the smoothness of discharging. When the mud cake begins to form, the increase of cutter torque accords with the cubic polynomial function, and the tunneling speed is exponentially reduced. The water content of soil has a significant effect on the formation of mud cake and clogging of the cutter head. If the water content approaches the plastic limit, the mud cake will form easily, the shield tunneling efficiency will be minimized, and the risk of clogging is the highest. The research results are of great significance in assessing the risks of mud cake and clogging of cutterhead of panel EPB shield tunneling in clay ground.
- earth-pressure-balance shield,
- cohesive stratum,
- panel cutterhead,
- clay cake,
- clogging,
- indoor test

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References (27)

References

[1]	竺维彬, 鞠世健, 张弥, 等. 广州地铁二号线旧盾构穿越珠江的工程难题及对策[J]. 土木工程学报, 2004(1): 56-60 https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC200401009.htm ZHU Wei-bin, JU Shi-jian, ZHANG Mi, et al. On the engineering poser and countermeasure of driving and crossing the Pearl River with two used TBMs in Guangzhou metro line of No. 2[J]. China Civil Engineering Journal, 2004(1): 56-60. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC200401009.htm
[2]	李志军, 翟志国, 赵康林. 泥水盾构刀盘结泥饼形成原因及防治技术[J]. 地下空间与工程学报, 2014, 10(增刊2): 1866-1871. https://www.cnki.com.cn/Article/CJFDTOTAL-BASE2014S2022.htm LI Zhi-jun, ZHAI Zhi-guo, ZHAO Kang-lin. Causes of mud cake formation on cutter head of slurry shield and its control technology[J]. Chinese Journal of Underground Space and Engineering, 2014, 10(S2): 1866-1871. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-BASE2014S2022.htm
[3]	郭彩霞, 孔恒, 王梦恕. 无水大粒径漂卵砾石地层土压平衡盾构施工渣土改良分析[J]. 土木工程学报, 2015, 48(增刊1): 201-205. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC2015S1033.htm GUO Cai-xia, KONG Heng, WANG Meng-shu. Study on muck improvement of EPB shield tunneling in waterless sandy-cobble-boulder stratum[J]. China Civil Engineering Journal, 2015, 48(S1): 201-205. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC2015S1033.htm
[4]	严辉. 盾构隧道施工中刀盘泥饼的形成机理和防治措施[J]. 现代隧道技术, 2007, 44(4): 24-27, 35. https://www.cnki.com.cn/Article/CJFDTOTAL-XDSD200704007.htm YAN Hui. Mechanism of the formation and the prevention of clay cake in shield tunneling[J]. Modern Tunnelling Technology, 2007, 44(4): 24-27, 35. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XDSD200704007.htm
[5]	董祥宽. 重庆复合式TBM刀盘防结泥饼技术[J]. 隧道建设, 2012(增刊2): 101-104. https://www.cnki.com.cn/Article/CJFDTOTAL-JSSD2012S2020.htm DONG Xiang-kuan. Research on the key elements of the combined TBM in the Chongqing metro[J]. Tunnel Construction, 2012(S2): 101-104. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JSSD2012S2020.htm
[6]	杨金钟, 魏斌效, 田利锋. 辐条式刀盘在砂卵石地层的泥饼成因及处理措施[C]//2011中国盾构技术学术研讨会论文集, 2011, 北京. YANG Jin-zhong, WEI Bin-xiao, TIAN Li-feng. Causes and treatment measures of mud cake of spoke cutter in sandy pebble formation[C]//Proceedings of 2011 China Symposium on Shield Machine Technology, 2011, Beijing. (in Chinese)
[7]	康洪信. 硬塑黏土层盾构干碴出土施工技术研究[J]. 铁道建筑技术, 2016(增刊1): 248-251. KANG Hong-xin. Shield machine dry soil excavating technologies in hard plastic clay layer[J]. Railway Construction Technology, 2016(S1): 248-251. (in Chinese)
[8]	侯凯文, 王崇, 江杰, 等. 南宁地铁2号线盾构选型设计与适应性分析[J]. 隧道建设, 2017(8): 1037-1045. HOU Kai-wen, WANG Chong, JIANG Jie, et al. Type selection design and adaptability analysis of shield used in line No. 2 of Nanning metro[J]. Tunnel Construction, 2017(8): 1037-1045. (in Chinese)
[9]	邓彬, 顾小芳. 上软下硬地层盾构施工技术研究[J]. 现代隧道技术, 2012, 49(2): 59-64. https://www.cnki.com.cn/Article/CJFDTOTAL-XDSD201202013.htm DENG Bin, GU Xiao-fang. Study of shield construction technology in soft upper stratum and hard under stratum[J]. Modern Tunnelling Technology, 2012, 49(2): 59-64. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XDSD201202013.htm
[10]	翟圣智, 胡蒙达, 叶明勇, 等. 南昌上软下硬地层土压平衡盾构渣土改良技术研究[J]. 铁道建筑, 2014(8): 27-30. https://www.cnki.com.cn/Article/CJFDTOTAL-TDJZ201408009.htm ZHAI Sheng-zhi, HU Meng-da, YE Ming-yong, et al. Ground conditioning technology for EPB shield tunneling in composite strata in Nanchang[J]. Railway Engineering, 2014(8): 27-30. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-TDJZ201408009.htm
[11]	陈馈, 冯欢欢. 深圳地铁11号线大直径盾构适应性设计[J]. 现代隧道技术, 2015, 52(2): 166-173. https://www.cnki.com.cn/Article/CJFDTOTAL-XDSD201502026.htm CHEN Kui, FENG Huan-huan. Adaptability design for a large-diameter shield used in Shenzhen metro line 11[J]. Modern Tunnelling Technology, 2015, 52(2): 166-173. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XDSD201502026.htm
[12]	刘卫. 南昌复合地层盾构渣土改良技术[J]. 隧道建设, 2015, 35(5): 455-462. https://www.cnki.com.cn/Article/CJFDTOTAL-JSSD201505020.htm LIU Wei. Ground conditioning technology for shield tunneling in composite strata in Nanchang[J]. Tunnel Construction, 2015, 35(5): 455-462. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JSSD201505020.htm
[13]	SPA G. Review of alternative construction methods and feasibility of proposed methods for constructing Attiko Metro Extension of Line 3 to EgaleoAttiko Metro SA[Z]. Greece, 1995.
[14]	THEWES M, BURGER W. Clogging of TBM drives in clay–identification and mitigation of risks[J]. Erdem and Solak (eds) Underground Space Use, 2005: 737-742.
[15]	THEWES M, HOLLMANN F. Assessment of clay soils and clay-rich rock for clogging of TBMs[J]. Tunnelling & Underground Space Technology Incorporating Trenchless Technology Research, 2016, 57: 122-128.
[16]	FEINENDEGEN M, ZIEGLER M, SPAGNOLI G, et al. A new laboratory test to evaluate the problem of clogging in mechanical tunnel driving with epb-shields[C]//ISRM International Symposium-eurock, 2010, London.
[17]	HOLLMANN F S, THEWES M. Assessment method for clay clogging and disintegration of fines in mechanized tunnelling[J]. Tunnelling & Underground Space Technology, 2013, 37(13): 96-106.
[18]	FEINENDEGEN M, ZIEGLER M, SPAGNOLI G, et al. Evaluation of the clogging potential in mechanical tunnel driving with EPB-shields[C]//Proceedings of the 15th European Conference on Soil Mechanics and Geotechnical Engineering, 2011, Athens: 1633-1638.
[19]	THEWES M, BUDACH C. Soil conditioning with foam during EPB tunneling[J]. Geomechanics and Tunnelling, 2010, 3(3): 256-267.
[20]	THEWES M, BUDACH C, BEZUIJEN A. Foam conditioning in EPB tunnelling[M]//Geotechnical Aspects of Underground Construction in Soft Ground, 2011, Rome.
[21]	ZUMSTEG R, PLÖTZE M, PUZRIN A M. Effect of soil conditioners on the pressure and rate-dependent shear strength of different clays[J]. Journal of Geotechnical &Geoenvironmental Engineering, 2012, 138(9): 1138-1146.
[22]	ZUMSTEG R, PLÖTZE M, PUZRIN A. Reduction of the clogging potential of clays: new chemical applications and novel quantification approaches[J]. Géotechnique, 2013, 63(4): 276-286.
[23]	Burbaum U, Sass I, Breuer B. Adhesive properties of variable solid clay stones based on the example of the Stuttgart Lias Alpha[J]. Geotechnology, 2010, 33(2): S.175-178. (in German)
[24]	HEUSER M, SPAGNOLI G, LEROY P, et al. Electro-osmotic flow in clays and its potential for reducing clogging in mechanical tunnel driving[J]. Bulletin of Engineering Geology & the Environment, 2012, 71(4): 721-733.
[25]	朱伟. 隧道标准规范(盾构篇)及解说[M]. 北京: 中国建筑工业出版社, 2001. ZHU Wei. Japanese Standards for the Shield Tunnel[M]. Beijing: China Architecture & Building Press, 2001. (in Chinese)
[26]	蔡兵华, 李忠超, 余守龙, 等. 土压平衡盾构施工中红黏土土体改良试验研究[J]. 现代隧道技术, 2019, 56(5): 218-227. https://www.cnki.com.cn/Article/CJFDTOTAL-XDSD201905031.htm CAI Bin-hua, LI Zhong-chao, YU Shou-long, et al. Experimental study on red clay conditioning for EPB shield tunnelling[J]. Modern Tunnelling Technology, 2019, 56(5): 218-227. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-XDSD201905031.htm
[27]	万伦来, 王立平. 统计学原理与应用[M]. 北京: 清华大学出版社, 2013. WANG Lun-lai, WANG Li-ping. Principles and Applications of Statistics[M]. Beijing: Tsinghua University Press, 2013. (in Chinese)