REPLACEMENT TYPE SOIL PRESSURE MEASURING DEVICE FOR SHIELD MACHINE

PROBLEM TO BE SOLVED: To provide a replacement type soil pressure measuring device for a shield machine, enabling the presence or absence of flush to be confirmed before a sensor body is replaced. SOLUTION: This replacement type soil pressure measuring device includes: a base 13 which is attached to a mounting hole 5 extending through a partition wall 3 for partitioning a facing side and a mine inner side and has a spherical recess 11 and a communication hole 12 formed by communicating the facing side with the mine inner side in the recess 11; a sensor holding body 15 which comprises a spherical projection 14 matching the recess 11 and supported on the base 13 rotatably between a normal rotating angle and a rotating angle in replacement; a sensor mounting hole 26 which allows the facing side to communicate with the mine inner side when the sensor holding body 15 is at the normal rotating angle and is closed by the inner surface of the recess 11 when the sensor holding body 15 is at the rotating angle in replacement, and the sensor body 27 detachably supported in the sensor mounting hole 26. The base 13 includes a communication passage 37 for confirmation of flush water, one end 37a of which is opened to the inner surface of the recess 11 and the other end 37b of which is opened to the mine inner side. COPYRIGHT: (C)2010,JPO&INPIT