岩土力学 ›› 2021, Vol. 42 ›› Issue (5): 1363-1372.doi: 10.16285/j.rsm.2020.1468

• 基础理论与实验研究 • 上一篇    下一篇

预切槽和TBM机械滚刀的 新型联合破岩模式研究

徐福通1, 2，卢景景1, 2，周辉1, 2，肖建成1, 2，张传庆1, 2，邱浩权1, 3   

  1. 1. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，湖北 武汉 430071； 2. 中国科学院大学，北京 100049；3. 湖北工业大学 土木建筑与环境学院，湖北 武汉 430068
  • 收稿日期:2020-09-28 修回日期:2021-01-14 出版日期:2021-05-11 发布日期:2021-05-08
  • 通讯作者: 周辉，男，1972年生，博士，研究员，博士生导师，主要从事岩石力学与工程方面的研究工作。E-mail：hzhou@whrsm.ac.cn E-mail:xufutong18@mails.ucas.ac.cn
  • 作者简介:徐福通，男，1996年生，博士研究生，主要从事岩土力学试验与数值模拟的研究工作
  • 基金资助:
    中国科学院基础前沿科学研究计划（No. ZDBS-LY-DQC022）；国家自然科学基金专项项目资助（No. 41941018）；湖北省自然科学基金创新群体（No. 2018CFA013）

Research on combined rock-breaking mode of pre-cutting groove and TBM mechanical cutter

XU Fu-tong1, 2, LU Jing-jing1, 2, ZHOU Hui1, 2, XIAO Jian-cheng1, 2, ZHANG Chuan-qing1, 2, QIU Hao-quan1, 3   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. University of Chinese Academy of Sciences, Beijing, 100049, China; 3. College of Civil Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China
  • Received:2020-09-28 Revised:2021-01-14 Online:2021-05-11 Published:2021-05-08
  • Supported by:
    This work was supported by the Key Research Program of Frontier Sciences(ZDBS-LY-DQC022), the National Natural Science Foundation of China (NSFC)(41941018) and the Hubei Province Natural Science Foundation Innovation Group(2018CFA013).

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摘要： 传统机械-岩体相互作用的破岩模式已经无法大幅提升隧道掘进机（tunnel boring machine，简称TBM）的掘进效率，新型破岩技术及其破岩机制逐渐被重视。在不改变现有TBM主体结构的前提下，通过开展3种不同岩性有无预切槽试样在侧向约束条件下的TBM常截面滚刀压头贯入试验，研究预切槽对TBM机械滚刀破岩效果的影响规律，结果表明：（1）预切槽可降低岩样破碎时压头的法向荷载，与不切槽相比，有预切槽的岩样破碎时法向荷载降低44.13%～53.05%，岩石单轴抗压强度越低，法向荷载降低比例越大；（2）预切槽深度对岩样破碎时法向荷载的影响存在临界值，超过临界值后，预切槽深度对岩样破坏行为影响减弱。基于此，提出了预切槽+TBM机械滚刀破岩的新型联合破岩模式，并探讨了可实现预切槽的新型破岩技术。联合破岩模式能够突破破岩效率瓶颈，对TBM装备升级和重大工程项目建设具有重要意义。

关键词: 预切槽, TBM机械滚刀, 破岩模式, 破岩技术, 联合破岩

Abstract: The traditional rock-breaking mode of mechanical-rock interaction can no meet the requirement of large improvement of tunneling efficiency of TBM. Innovative rock-breaking technology and its rock-breaking mechanism have gradually been paid more and more attention. On the premise of not changing the main structure of TBM, the penetration test using TBM constant cross-section hob indenter has been carried out on rock samples with three different lithology under lateral constraint conditions. The influence of pre-cutting groove on rock-breaking mode of mechanical cutter are studied. The results show that: (1) Pre-cutting groove can reduce the normal load of indenter when the rock sample is broken, and the normal load of the rock sample with pre-cutting groove is reduced by 44.13%-53.05% compared with that without groove. The lower the uniaxial compressive strength of the rock is, the larger the reduction ratio of normal load will be. (2) There is a critical value for the influence of pre-cutting groove depth on the normal load when the rock sample is broken. Beyond this critical value, the influence of pre-cutting groove depth on the failure behavior of the rock sample is weakened. Based on the above investigations, a new combined rock-breaking mode of pre-cutting groove and mechanical cutter is proposed, and an innovative rock breaking technology that can realize pre-cutting groove is discussed. The combined rock-breaking mode can break through the bottleneck of rock-breaking efficiency and is of great significance for TBM equipment upgrading and major engineering project construction.

Key words: pre-cutting, TBM mechanical cutter, rock-breaking mode, rock-breaking technology, combined rock breaking

中图分类号: 

  • TU 452，P 634.1
[1] 彭怀德，刘敦文，褚夫蛟，翦英骅,. 硬岩隧道高压气体膨胀破岩开挖试验[J]. , 2018, 39(1): 242-248.
[2] 王秀英 ，张 钅咸，吕和林 ，周明亮. 机械预切槽法开挖软土隧道地层变形研究[J]. , 2005, 26(1): 140-144.
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