Abrégé

Provided is a working-face-vicinity property measuring device in a shield tunneling machine or a tunnel boring machine, which can be used without boring from above ground, etc. A working-face-vicinity property measuring device 6 (6A, 6B, 6C, 6D, 6E) for use with an earth pressure type shield 1 serving as a shield tunneling machine comprises: an exploration jig 61 which is stored within the shield tunneling machine or a tunnel boring machine and which reaches a working-face vicinity FA; a jack 62 which serves as an advancing and retracting means for causing the exploration jig 61 to advance and retract between the shield tunneling machine or the tunnel boring machine and the working-face vicinity FA; and a displacement sensor 66 which detects an amount of displacement of the exploration jig 61. Among these components, the exploration jig 61 is stored within a fixed mixing blade 55 that projects into a chamber 16 from a separating wall 3 of the shield tunneling machine.

Classes IPC  ?

• E21D 9/093 - Commande du bouclier de percement

Abrégé

Provided is a setting system for a managed earth pressure of a shield excavator, which sets the managed earth pressure not via assumptions or estimations, but by directly measuring the relationship between face displacement and mud pressure in a chamber. The same is a setting system for a managed earth pressure in, as a shield excavator, an earth-pressure shield 1. This setting system for a managed earth pressure comprises: a pressure gauge 22 for measuring the mud pressure in a chamber 16; an earth removal apparatus 17 as a mud pressure changing means for changing the mud pressure in the chamber 16; displacement measurement means 6, 7 for measuring the displacement of a face F; an analysis unit 41 that analyzes a deformation characteristic of the ground on the basis of the measured mud pressure and the measured displacement of the face; and a setting unit 42 for setting the managed earth pressure on the basis of the analyzed deformation characteristic.

Classes IPC  ?

• E21D 9/093 - Commande du bouclier de percement