cutterhead การใช้

• The cutterhead is filled with pressurised slurry which applies hydrostatic pressure to the excavation face.
• Seismic joint locations defined during design phase were verified through continuous monitoring of cutterhead torques.
• The cutterhead shown is the Neumann SX74 for cutting lacquer discs ( not copper discs ) and was introduced in 1974.
• The project used three tunnel-boring machines, all sporting a cutterhead, during construction May 2011 to May 2012.
• Pressure is maintained in the cutterhead by controlling the rate of extraction of spoil through the Archimedes screw and the advance rate.
• In June 2010 the TBM's hard rock cutterhead was replaced with its original cutterhead, designed to bore through clay.
• In June 2010 the TBM's hard rock cutterhead was replaced with its original cutterhead, designed to bore through clay.
• A maintenance stop from June 23 to July 18 was conducted under Spring Street, replacing 33 of the cutterhead's teeth.
• As the coal recovery cycle continues, the cutterhead is progressively launched into the coal seam for 19.72 feet ( 6.01 m ).
• A typical cycle includes sumping ( launch-pushing forward ) and shearing ( raising and lowering the cutterhead boom to cut the entire height of the coal seam ).
• Over the next two years, a recovery pit was dug from the surface in order to access and lift the machine's cutterhead for repair and partial replacement.
• The vacuum created by the shroud and the ability to convey material to the pump faster makes auger dredge systems more productive than similar sized conical ( basket ) type cutterhead dredges.
• Over the next two years, a recovery pit was dug from the surface in order to access and lift the machine's cutterhead for repair and partial replacement in 2015.
• The slurry also acts as a transport medium by mixing with the excavated material before being pumped out of the cutterhead back to a slurry separation plant, usually outside of the tunnel.
• This caused a two-year delay as it was necessary to dig a vertical shaft recovery pit from the surface in order to access and lift the cutterhead for repair and partial replacement.
• Utilized TBM ranks first with its 33 kW cutterhead power per square meter, second with its 12.0 bar design pressure; and sixth with its 147 m?excavation area in the world.
• Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and is the world's largest earth pressure balance tunnel boring machine, at a cutterhead diameter of across.
• Additives can also be injected in the cutterhead / extraction screw to ensure that the spoil remains sufficiently cohesive to form a plug in the Archimedes screw to maintain pressure in the cutterhead and restrict water flowing through.
• Additives can also be injected in the cutterhead / extraction screw to ensure that the spoil remains sufficiently cohesive to form a plug in the Archimedes screw to maintain pressure in the cutterhead and restrict water flowing through.
• Then, the Pushbeam Transfer Mechanism ( PTM ) automatically inserts a 19.72-foot ( 6.01 m ) long rectangular Pushbeam ( Screw-Conveyor Segment ) into the center section of the machine between the Powerhead and the cutterhead.