Flexibility segment null for shield tunneling method secondary application

摘要

PURPOSE:To make it possible to ensure effective thrust transfer function and cut-off function even in the case of driving construction within the same shape size as that of a general segment and in the case of subsequent secondary lining construction by using a rigid body combined with a specific expansion body. CONSTITUTION:Second side-ring bodies 35 having the practically same width as thickness of a secondary construction general segment 30 mounted to the inside of a primary construction segment 20 are connected to first side-ring bodies 5 with connection boards 36. After that, a secondary construction segment 44 connecting a plurality of second plate-like connection ring members 37 to a plurality of second flexible members 40 forming bendable sections 41 in the middle section are formed between the second side-ring bodies 35. At that time, projection threads 38 receiving and bearing the ends of the second flexible members 40 are formed in the middle section of the second plate-like connection members 37, and the ends of the second flexible members 40 are set opposed to the projection threads 38 and second plate-like connection ring members 37 and are anchored with bolts 43 through holding plates 42.