KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지

A Parametric Study of Rock Properties and Mechanical Cutting Conditions for Deriving an Optimum Design Model of a TBM Cutterhead Equipped With Disc Cutters

디스크 커터를 장착한 TBM 커터해드의 최적 설계모델 도출을 위한 영향인자 분석

Chang, Soo-Ho;Choi, Soon-Wook;Bae, Gyu-Jin;Jeon, Seok-Won
장수호;최순옥;배규진;전석원

  • Published : 20070100

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Abstract

This study aimed to examine the effects of rock properties and mechanical cutting conditions on the cutting performance of a TBM disc cutter by carrying out a series of linear cutting tests for eight different kinds of rock conditions. Here the mechanical cutting conditions included cutter spacing and cutter penetration depth. In addition, by measuring rock properties related to drillability indices used in the NTNU model, their applicability as the input parameters in a TBM cutterhead design model was evaluated. Among a variety of rock properties, it was possible to estimate a broad range of cutter forces based on DRI used in the NTNU model. However, based solely on rock properties without the consideration of mechanical cutting conditions, it was impossible to predict the cutting performance of a cutter. From a series of sensitivity analyses on a number of probable factors influencing TBM performance, it was shown that mechanical cutting conditions such as cutter spacing and cutter penetration depth had the dominant effects on cutter forces as well as cutting specific energy. On the other hand, the optimum cutting conditions and the critical penetration depths were highly dependent on rock properties. Especially, from higher sensitivity ranks of drillability indices-related rock properties, it was suggested that they should be utilized to predict the performance of a TBM cutter more accurately.

Keywords

References

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