Experimental study of rock-machine interaction responses in sandstone with distributed boreholes through TBM tunnelling test

IF 6.7 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Tunnelling and Underground Space Technology Pub Date : 2025-06-19 DOI:10.1016/j.tust.2025.106816

Wei-Qiang Xie , Xiao-Li Liu , Xiao-Xiong Zhou , Nai-Fu Deng

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引用次数: 0

Abstract

Geological drilling is frequently used in the tunnelling process of a tunnel boring machine (TBM) to detect the engineering geology ahead the tunnel face. The presence of distributed borehole is considered as challenging geology, which affects the TBM tunnelling response. This study investigates the rock-machine interaction characteristics of TBM tunnelling in sandstone with distributed boreholes. Utilizing a novel tunnelling test platform, named DGTBM-A, comprehensive experiments were conducted on sandstone specimens with varying uniaxial compressive strengths (UCS) and different borehole distributions. The DGTBM-A platform can reveal the tunnelling process of TBM and record the tunnelling parameters in real-time. The experiments involve sandstone specimens with uniaxial compressive strengths (UCS) of 32 MPa (low), 61 MPa (medium), and 95 MPa (high). The medium strength specimens contain 0–4 symmetrically distributed boreholes (diameter = 50 mm, depth = 200 mm). The experiments aimed to understand the influence of the geological variables on rock-TBM interaction. The interaction was characterized by thrust, torque, penetration, as well as the characteristics of the produced rock muck. It finds that higher thrusts improved tunnelling efficiency by 200 % with thrust increasing from 20 to 70 kN, but specific energy consumption increases linearly (slope = 0.015 MJ/m³/kN). Distributed boreholes enhanced TBM tunnelling efficiency (advance rate increased by 47 % at 40 kN thrust) without significantly raising energy costs (specific energy raised 12 %), though the required torque rose substantially (about 30 %). Rocks with higher strength pose greater excavation challenges (field penetration index increased by 200 %), with lower advance rate and higher required torque. Rock muck analysis shows that larger thrusts and boreholes led to more effective rock breaking, producing a higher proportion of fine particles. This study provides an understanding of the rock-machine interaction involved in TBM tunnelling in rocks with distributed boreholes, which can inform the design and optimization of TBM operations in similar geological conditions.

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基于TBM隧道掘进试验的分布钻孔砂岩岩机相互作用试验研究

地质钻孔是隧道掘进机掘进过程中常用的一种工程地质探测方法。分布井眼的存在是具有挑战性的地质条件，影响了隧道掘进机的掘进响应。研究了隧道掘进机在分布钻孔砂岩中掘进的岩机相互作用特性。利用新型隧道试验平台DGTBM-A，对不同单轴抗压强度（UCS）、不同钻孔分布的砂岩试件进行综合试验。DGTBM-A平台可以实时显示TBM掘进过程，记录掘进参数。试验采用单轴抗压强度分别为32 MPa（低）、61 MPa（中）和95 MPa（高）的砂岩试件。中等强度试件包含0-4个对称分布的钻孔（直径= 50 mm，深度= 200 mm）。实验旨在了解地质变量对岩石- tbm相互作用的影响。相互作用的特征包括推力、扭矩、侵彻力以及产出的岩屑特征。研究发现，当推力从20 kN增加到70 kN时，更高的推力可使掘进效率提高200%，但比能量消耗呈线性增加（斜率= 0.015 MJ/m3/kN）。分布式钻孔提高了TBM的掘进效率（在推力为40 kN时推进率提高了47%），而没有显著提高能量成本（比能量提高了12%），尽管所需扭矩大幅增加（约30%）。岩石强度越高，开挖难度越大（现场穿透指数增加200%），推进速度越慢，所需扭矩越高。岩屑分析表明，更大的推力和钻孔导致更有效的岩石破碎，产生更高比例的细颗粒。该研究为TBM在具有分布钻孔的岩石中掘进所涉及的岩石-机器相互作用提供了理解，可以为类似地质条件下TBM作业的设计和优化提供信息。

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来源期刊

Tunnelling and Underground Space Technology 工程技术-工程：土木

CiteScore

11.90

自引率

18.80%

发文量

454

审稿时长

10.8 months

期刊介绍： Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.