土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (4): 576-581.

• 专题论述 • 上一篇    下一篇

水射流在新型TBM联合破岩中的破岩能力研究

邱浩权1,2   

  1. （1.湖北工业大学 土木建筑与环境学院，武汉 430068；2.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，武汉 430071）
  • 收稿日期:2021-02-25 修回日期:2021-03-06 出版日期:2022-08-30 发布日期:2022-08-25
  • 作者简介:邱浩权（1994-），男，硕士，研究方向为机械水力联合破岩。
  • 基金资助:
    中国科学院基础前沿科学研究计划从0到1原始创新项目（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）

Water Jetting in the New TBM Combined Rock Breaking Feasibility Study

QIU Haoquan1,2   

  1. (1.College of Civil Engineering, Hubei University of Technology, Wuhan 430068；
    2.State Key Laboratory for Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071)
  • Received:2021-02-25 Revised:2021-03-06 Online:2022-08-30 Published:2022-08-25

摘要： 隧道掘进机（Tunnel Boring Machine，简称TBM）发展至今已经有一百多年的历史，随着开挖环境的变化，以传统刀具为主要破岩形式的TBM的掘进效率已经越来越难以满足施工的需求，因此提出了新的联合破岩方法，即机械水力联合破岩方式。主要以试验的形式，首先研究的是在不同的切割参数下，水射流切割不同的岩石所能形成的切槽的深度，然后在此试验规律的基础上，采用重复切割同一条切缝的方法增加切割深度。研究结果表明：①射流压力越大，切割速度越慢，切割深度越大；切割较软岩石时，靶距对切割深度有一定的影响，切割较硬岩石时，靶距对切割深度的影响较小；②多次重复切割能够有效的增加切割深度，但切割深度的增加程度与切割参数有关系，射流压力越大，切割速度越慢，靶距越小，切割深度增加的程度越大。研究成果对于指导TBM的改进，提高掘进效率具有重要参考价值。

关键词: 联合破岩, 切缝深度, 高压水射流, 工艺参数, 影响规律

Abstract: The tunnel boring machine (TBM) has been developed for more than 100 years. With the changes in the excavation environment, the tunneling efficiency of TBM, which uses traditional tools as the main form of rock breaking, has become increasingly difficult to meet the requirements. Due to increasingly high construction requirements, a new combined rock breaking method is proposed, that is, a mechanical-hydraulic combined rock breaking method. This article is mainly from the approach of experiments. First, this paper studies the depth of grooves that can be formed by water jetting in cutting different rock types under different cutting parameters. Then, based on this experimental rule, the proposed water jetting adopts the method of repeatedly cutting in the same slot to increase the cutting depth. The experimental results show that: ①The higher the water jetting pressure, the slower the cutting speed and the greater the cutting depth. When cutting softer rock types, the target distance has a certain influence on the cutting depth. When cutting harder rock types, the target distance has a certain effect on the cutting depth. The impact is small. ②The repetitive cutting can effectively increase the cutting depth, but the increase in the cutting depth is related to the cutting parameters. The greater the water jetting pressure, the slower the cutting speed, the smaller the target distance, the greater the increase in the cutting depth. The experimental results have an important reference value for guiding the improvement of TBM and improving the tunneling efficiency.

Key words: Combined Rock Breaking, Cutting Depth, High-Pressure Water Jetting, Process Parameters, Influence Factors

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