›› 2017, Vol. 38 ›› Issue (S2): 295-303.doi: 10.16285/j.rsm.2017.S2.041

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Discussion on rock strength estimating method based on TBM parameters

MA Chi-shuai1,2, CHEN Wei-zhong1,3, TIAN Hong-ming1, YANG Jian-ping1   

  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. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan, Shandong 250061, China
  • Received:2017-03-23 Online:2017-11-23 Published:2018-06-05
  • Supported by:

    This work was supported by the National Program on Key Basic Research Project (973 Program)(2015CB057906).

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Abstract: It is difficult to estimate the detailed rock strength of excavating face timely and effectively when tunnel boring machine(TBM) advances, which results in it difficult to predict the risk of rockburst and TBM jamming. Based on previous research results and engineering practices, a method for estimating rock strength using TBM parameters is proposed for real-time in-situ estimation of rock strength. The equation of real-time estimation is established by the mechanical analysis between TBM specifications, excavation parameters and the rock strength. Then the relationships between the constants in the equations and the TBM specifications such as excavation(tunnel) diameter, cutter diameter are determined in this study on the basis of data collected at several tunnels. Typical TBM case studies for application further verified the wide suitability and reliability of the novel equations. The proposed method appears to be promising and feasible for real-time in-situ estimation of rock strength.

Key words: tunnel boring machine(TBM), boring parameters, rock strength, real-time, in-situ estimation

CLC Number: 

  • TU452

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