Shield tunneling machine capable of changing excavation diameter at any proportion and diameter changing method

Abstract

The invention relates to the technical field of tunnel excavation construction equipment, in particular to a shield tunneling machine capable of changing the excavation diameter at any proportion and a diameter changing method. The shield tunneling machine comprises a variable-diameter cutterhead, a variable-diameter front shield, a variable-diameter middle shield, a tail shield and a trolley with telescopic supporting legs. The device further comprises a torsion beam, an active hinge oil cylinder, a folding shed type rubber hinge seal, a spiral conveyor, a segment erector and a man bin. According to the shield tunneling machine, the excavation diameter can be rapidly changed in any proportion within a certain range in a starting well and a tunnel; when other diameters or sections are excavated in a transition mode, the cutter head, the shield body and the rear matched trolley can all change the diameter rapidly, and excavation of different diameters or sections can be adapted only by manufacturing a folding shed type rubber hinge seal, a tail shield and the like. And the same shield tunneling machine can be used for excavating tunnels with different excavation diameters, so that the equipment purchase and transformation cost and the vertical shaft construction cost of a construction site are greatly reduced, the construction period is greatly shortened, and the shield tunneling machine has very high research value.

Description

technical field [0001] The invention relates to the technical field of tunnel excavation construction equipment, in particular to a shield machine capable of changing the excavation diameter at any ratio and a diameter changing method. Background technique [0002] At present, shield machines are widely used in the excavation of underground tunnels such as urban subways and comprehensive utility corridors. In actual construction, the diameters and sections of tunnels that need to be excavated are different. At present, the excavation diameter of the shield machine varies from 2 meters to 17 meters. Especially in the shield method construction of urban rail transit, the tunnel design standards are not uniform according to different regions. The excavation diameter of domestic subway tunnel shield machine has various specifications such as Φ6880, Φ6680, Φ6480, Φ6280, etc. The selection and deployment of shield machine has become a major influencing factor. Many companies nee...

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Problems solved by technology

However, in the construction method of installing a shaft to replace the shield machine, in addition to excavating the shaft, it is necessary to prepare multiple shield machines for excavation.

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