Tunnel boring device and system for the hydraulic removal of cuttings, and system for producing a stable fluid pressure for a boring fluid in the region of a cutting disk of the tunnel boring device

A system for the hydraulic removal of cuttings broken up by a tunnel boring device, comprising:

• a tunnel boring device configured for wet boring with heading face pressure regulation;
• a section for receiving the broken-up cuttings;
• a feed line for supplying boring fluid to the section;
• a suction line for removing boring fluid mixed with cuttings;
• a jet pump for removing the boring fluid mixed with cuttings;
• a driving line connected to a driving line connection of the jet pump, wherein driving fluid is conveyed to the jet pump by a driving pump;
• and
• a connection line between the feed line and the suction line;
• wherein the suction line, the feed line and the connection line each include at least one shut-off element;
• wherein the connection line connects to the suction line between the shut-off valve in the suction line and the jet pump;
• and
• wherein the connection line connects to the feed line before the shut-off valve in the feed line.

A system for producing a stable fluid pressure for a boring fluid in the region of a cutting disk of a tunnel boring device configured for wet boring at a heading face during the creation of a bore from a starting point to a target point in the ground along a predefined boring line by advancing the tunnel boring device to one of create a tunnel or lay a pipeline, wherein the tunnel boring device has a section behind the cutting disk for receiving cuttings released by the cutting disk, the system comprising:

• a feed line for supplying boring fluid to the heading face;
• a suction line for removing boring fluid mixed with cuttings from the section;
• a jet pump for removing the boring fluid mixed with cuttings;
• a driving line which is connected to a driving line connection of the jet pump, wherein driving fluid is conveyed to the jet pump by a driving pump;
• and
• a connection line between the feed line and the suction line, wherein at least one shut-off element is provided in each case in the suction line, the feed line and the connection line;
• wherein the connection line connects to the suction line between the shut-off valve in the suction line and the jet pump;
• and
• wherein the connection line connects to the feed line before the shut-off valve in the feed line.