Improvement on efficiency and reliability of Full-Face Tunneling Boring Machine

全断面掘进机效率和可靠性的提高

• 批准号: 09555319
• 负责人: OKUBO Seisuke
• 金额: $ 4.1万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555319/
• 关键词: TBM; Rock Mass; Strength; bedrock survey; Schmidt-hammer rebound hardness; Thrust; Torque; Reliability; 岩石; 岩盤掘削; 岩盤強度; 岩盤物性; 機械振動; トンネル

At present, various types of tunneling boring machines (TBMs) are widely used as a substitute for conventional tunneling methods. The performance of TBM is potentially far better than that of conventional methods. However, TBM performance is very poor when applied under conditions that are adverse to TBM.Therefore, measuring geological characteristics forward of the face is essential in order to improve the efficiency of TBM.In the present study, a method for estimating the rock strength of face using TBM cutting force, such as thrust, torque and cutting depth, is proposed. Rock strength along the tunnels is estimated from actual excavation data for sections a few hundred meters in length. The estimated strengths were then compared with those obtained using the bedrock survey and Schmidt-hammer rebound hardness. Estimated rock strengths were found to agree well with those found using these surveys. Moreover, the relationships between rock mass classification and estimated rock strength are discussed. The estimated rock strength was found to be in good agreement with the rock mass classification. Therefore, the proposed method provides a useful method for properly selecting a supporting pattern for rapidly changing rock mass characteristics, thereby preventing accidents and reducing construction time and expense.

目前，各种类型的隧道掘进机（TBM）被广泛使用作为传统隧道掘进方法的替代品。 TBM 的性能可能远远优于传统方法。然而，在对TBM不利的条件下使用时，TBM性能非常差。因此，为了提高TBM的效率，测量工作面前方的地质特征至关重要。在本研究中，提出了一种利用TBM切削力（例如推力、扭矩和切削深度）来估计工作面岩石强度的方法。隧道沿线的岩石强度是根据数百米长度路段的实际开挖数据估算的。然后将估计的强度与使用基岩调查和施密特锤回弹硬度获得的强度进行比较。估计的岩石强度被发现与使用这些调查发现的结果非常吻合。此外，还讨论了岩体分类和估计岩石强度之间的关系。发现估计的岩石强度与岩体分类非常一致。因此，该方法为针对快速变化的岩体特性正确选择支护模式提供了一种有用的方法，从而防止事故发生并减少施工时间和费用。

项目成果

Kuniyasu RYOKE: "Specific Energy of a Hard-Rock Tunneller and Rock Properties" Journal of the Japan Society of Civil Engineers. No.603, III-44. 89-100 (1998)

Kuniyasu RYOKE：“硬岩隧道的比能和岩石特性”日本土木工程师学会杂志。