Method and system for controlling earth pressure in tunnel borin

Details Method and system for controlling earth pressure in tunnel borin Method and system for controlling earth pressure in tunnel borin

1977-09-29

1979-09-11

Pate, III, William

Mining or in situ disintegration of hard material

Automatic control; signaling or indicating

Of hard material disintegrating machine

299 33, 405141, E21D 904

Patent

active

041672895

ABSTRACT:
In a tunnel boring or shield machine, a method and system for controlling the earth pressure, in which the earth pressure in the chamber of the shield machine body is detected and the detected earth pressure is compared with a reference value to thereby produce a chamber earth pressure deviation signal. In response to the chamber earth pressure deviation signal, means for controlling the amount of conveying earth accumulated in the chamber to the exterior of the machine body and/or means for advancing the shield machine body into the working face are controlled so as to maintain the earth pressure in the chamber within a predetermined range so that the breakdown of the exposed face or earth stratum as well as the rising of the ground are prevented from occurring.
In another method and system, the earth pressure at the working face is detected and the detected value is compared with a reference value to produce a signal representing the earth pressure deviation at the working face.

REFERENCES:
patent: 1529379 (1925-03-01), Thompson
patent: 3722715 (1973-03-01), Young
patent: 3769804 (1973-11-01), Matsushima
patent: 3822809 (1974-07-01), Foucalt
patent: 3881777 (1975-05-01), Altseimer
patent: 3961825 (1976-06-01), Lovar
patent: 4040666 (1977-08-01), Uchida
patent: 4068486 (1978-01-01), Uchida

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