SHIIRUDOKUTSUSHINKINOHAIDORYOKEISOKUSOCHI

摘要

PURPOSE:To simplify a measuring mechanism, and to reduce cost by installing a plurality of pressure sensors detecting soil-sand flow resistance pressure to a soil removing pipeline mounted in the soil removing path of a shield and fitting soil-removing quantity computing elements to the sensors. CONSTITUTION:A cutter head 11 is turned by a drive 12 disposed to the front of a shield body 10, and shield excavation is executed. Excavated soil and sand (a) are force-fed to a soil-removing pipeline 16 through a screw conveyor 13 driven by a driving motor 14. A plurality of pressure sensors 21 set up outside the pipeline 16 detect soil-sand flow resistance pressure in the pipeline 16, and outputs a signal 21a over a soil-removing quantity computing element 22. The computing element 22 arithmetically operates the quantity of soil removed on the basis of the detecting signal 21a. Excavated soil and sand (a) are carried and discharged onto a belt conveyor 17 from the pipeline 16, and housed in a truck 18 and carried to the outside.