Simulative Discrimination and Analysis of Clay Muck Blockage in Earth Pressure Balance Shield Chamber

被引：0
|
作者：
Ji C. [1 ,2 ]
Zhou S. [1 ,2 ]
Yao Q. [1 ,2 ]
Jin Y. [1 ,2 ]
Ouyang W. [1 ,2 ]
机构：
[1] Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai
[2] Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety, Tongji University, Shanghai
来源：
Tongji Daxue Xuebao/Journal of Tongji University | 2022年 / 50卷 / 01期
关键词：
Cohesive soil layer; Earth pressure balance shields; Flow angular velocity; Muck blockage; Shear plate torque;
D O I：
10.11908/j.issn.0253-374x.21174
中图分类号：
学科分类号：
摘要：
In this paper, an evaluation index for the muck status inside chambers based on shear plate torque is proposed. Then multiple sets of model tests are then conducted to reveal the change characteristics of this index before and after the clogging of clay muck inside the chamber. Finally, a real-time method for judging the muck clogging is established. The results show that the tendency of muck adhesion gradually develops toward the cutter head after the difference appears in the angular velocity of the muck around the central axis near the partition. At the same time, muck empties at the top of the chamber. Muck blockage eventually occurred. The occurrence of the void zone is the preliminary stage of the muck blockage and can be identified by the difference between shear plate torques on the top and underside of the shield chamber. © 2022, Editorial Department of Journal of Tongji University. All right reserved.
引用
收藏
页码：60 / 69
页数：9
相关论文
共 36 条
  • [1] ZHOU Shunhua, New challenges in construction mechanics of urban rail transit, Scientia Sinica Technologica, 46, (2016)
  • [2] MICHAEL F., Settlements induced by EPB heading-with a special review on empirical and numerical analysis, (2008)
  • [3] XU Kai, JI Chang, ZHOU Shunhua, Soil conditioning field test before heading face of EPB shield in sandy soil, China Civil Engineering Journal, 45, 9, (2012)
  • [4] ZHANG Runlai, GONG Quanmei, ZHOU Shunhua, Et al., Soil conditioning tests for earth pressure balance shield applications in sandy cobble strata, Journal of Tongji University (Natural Science), 47, 5, (2019)
  • [5] GUO Caixia, KONG Heng, WANG Mengshu, Study on muck improvement of EPB shield tunneling in waterless sandy-cobble-boulder stratum, China Civil Engineering Journal, 48, S1, (2015)
  • [6] WANG Zhufeng, FENG Huanhuan, Clay cake prevention for a slurry shield cutterhead in argillaceous siltstone, Modern Tunnelling Technology, 54, 6, (2017)
  • [7] ZHU Weibin, JU shijian, Causes and countermeasures of mud cake (secondary rock block) in shield construction, Underground Engineering and Tunnels, 2, (2003)
  • [8] HOU Kaiwen, WANG Chong, JIANG Jie, Et al., Type selection design and adaptability analysis of shield used in line No. 2 of Nanning metro, Tunnel Construction, 37, 8, (2017)
  • [9] YANG Yi, ZHU Wenjun, LI Xinggao, Et al., Evaluation method for muck conditioning of hard clay to prevent clogging in EPB tunneling, Journal of Beijing Jiaotong University, 43, 6, (2019)
  • [10] FANG Yong, WANG Kai, TAO Liming, Et al., Experimental study on clogging of cutterhead for panel earth-pressure-balance shield tunneling in cohesive strata, Chinese Journal of Geotechnical Engineering, 42, 9, (2020)
1234