| 摘要 |
Disclosed is a compound-type tunnelling shield, comprising a shield body (101) and a cutting disc (103) provided at the front end of the shield body (101). The compound-type tunnelling shield further comprises a high-pressure liquid spraying and grooving apparatus. The high-pressure liquid spraying and grooving apparatus comprises: a liquid storage chamber (1), the liquid storage chamber (1) housing a liquid for spraying; a pressurising mechanism used for pressurising the liquid, the pressurising mechanism being in communication with the liquid storage chamber (1), and the pressurising mechanism being in communication with a central rotating connector (5) via a first pipeline (4); and multiple nozzles (8) provided on the cutting disc (103), the nozzles (8) being in communication with the central rotating connector (5) via a second pipeline (6). When dealing with a loose stratum, the compound-type tunnelling shield can both rely on a mechanical blade such as a cutter to directly perform cutting, and also rely on a high-pressure liquid spray in combination with the mechanical blade to perform cutting, preventing the scenarios of the disc-shaped hobbing cutter catching, eccentric wear, and sediment on a cutter ring combining to form "cake" that may occur from use of a compound-type tunnelling shield with a disc-shaped hobbing cutter in the prior art. |
