The cutter ring breakage as a cutter failure mode in shield tunnel construction is more likely to occur in the centre zone of cutterhead. Given the inconsistence of this phenomenon with the linear cutting theory, the present paper suggests the use of the circular cutting theory to explain the cutter ring breakage and find the correlation between the unbalanced side force and cutter ring breakage. The numerical simulation performed by LS-DYNA demonstrates the difference existing between the inner side and outer side forces. The rock breakage in circular cutting process shows that the difference of side force is more remarkable in the centre zone than in the outer region of cutterhead.

LOKASI: Ruang Koleksi Umum
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