APPLICATION CHANGE OF STRUCTURAL PILLAR IN MULTI-CIRCULAR SHIELD CONSTRUCTION AND ITS MAIN PILLAR STRUCTURE

摘要

PURPOSE: To enhance the safety in withdrawing a temporary pillar by suppressing the occurrence of a cracking. ;CONSTITUTION: A buffer member 11 and an edge cutting member 12 are installed on a main temporary pillar 10 in a main pillar 1, and a gap is formed between a lower longitudinal girder part supporting pressing plate 3, and the lower longitudinal girder concrete part E2 is laid. Into the gap, a flat jack 5 and a liner plate are inserted, and then the main pillar 1 is jacked up by the flat jack 5. After each load of a temporary pillar C and the main temporary pillar 10 is application-changed to the main pillar 1, the temporary pillar C is withdrawn.;COPYRIGHT: (C)1996,JPO