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Tail clearance measurement method of shield machine, and, roundness grasp method of segment ring
Tail clearance measurement method of shield machine, and, roundness grasp method of segment ring
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机译：盾构机的尾部间隙测量方法以及节环的圆度把握方法
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摘要
PROBLEM TO BE SOLVED: To stably measure a tail clearance in a tail part of a shield machine by a relatively simple constitution.;SOLUTION: A method for measuring a tail clearance of a shield machine includes the steps of: shortening a shield jack and constructing a segment ring in a tail part (S1, S2); measuring a distance Ds from a reference position in the tail part to an inner surface of the segment ring by using a distance sensor (S4); extending the shield jack, extruding the segment ring towards a back side of the tail part, and propelling a boring machine body forward by reaction force of the segment ring (S5); measuring a distance Dt from the reference position in the tail part to an inner surface of the tail part by a distance sensor (S6); and calculating a tail clearance value Ct on the basis of the measured distance Dt and distance Ds (S7). The distance sensors are fixed to the boring machine body and positioned inside the tail part.;COPYRIGHT: (C)2015,JPO&INPIT
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