Tunneling machine and construction method of tunneling machine

Abstract

The invention discloses a tunneling machine. The tunneling machine comprises a heading machine body and a tightly supporting shield, wherein the heading machine body is connected with a propulsion oilcylinder, the tightly supporting shield is arranged in back of the propulsion oil cylinder and used for providing reaction thrust for the propulsion oil cylinder, and the outer side of the tightly supporting shield is provided with transition rings used for axially supporting duct pieces spliced on the wall of a tunnel to balance the axial load of the duct pieces. The tunneling machine has the advantages that during tunnel construction with better geological conditions, duct piece splicing is not performed on the wall of the tunnel, the tunneling machine still can achieve normal tunneling andstepping, the construction efficiency can be improved, and the construction cost is reduced; in a transition section between construction with duct pieces and construction without duct pieces, ring pieces of the transition rings can support the duct pieces under the support of a supporting mechanism to balance the axial load of the duct pieces so that the load of the duct pieces is balanced so asto keep stability. The provided construction method of the tunneling machine does not need to splice duct pieces on the wall of the tunnel in the same way, the normal tunneling and stepping can be achieved, the construction efficiency can be improved, and the construction cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of tunnel boring equipment, and in particular relates to a tunnel boring machine and a construction method of the tunnel boring machine. Background technique [0002] Tunnel boring machine (TBM) is a large-scale complete set of construction equipment specially used for excavating tunnels in rock formations. Among them, shield tunnel boring machines need to assemble concrete segments during the construction process to provide propulsion or stepping force for the equipment. At the same time, assembling segments on the tunnel wall can also be used to line the tunnel wall to improve the stability of the tunnel wall and ensure the safety of the tunnel. [0003] During the construction of the shield tunnel boring machine, the propulsion cylinder needs to be supported on the segments laid along the tunnel during the forward advancement or stepping process of the propulsion cylinder, and the reaction force of the pr...

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Problems solved by technology

[0004] However, because the excavation distance of the tunnel is usually relatively long, the geological conditions of the strata traversed by the tunnel line are often not uniform. Among them, in the medium-hard rock formation with complete surrounding rock structure, the tunnel wall has better stability and safety, and there is no need to use assembled segments to line the tunnel wall. In this case, Using the shield tunnel boring machine for construction and still assembling segments will greatly increase the construction volume, low construction efficiency, and increase construction costs, so that the best construction efficiency and economy cannot be achieved; moreover, when assembling segments In the construction section of the tunnel boring machine, the propulsion cylinder of the tunnel boring machine is supported on the end face of the segment to provide propulsion, while in the construction section without a segment, the propulsion cylinder is supported by the own parts of the tunnel boring machine and does not need to be supported on the segment, so , in the transition section between segments with and without segments, when the propulsion cylinder is not supported on the segment, the end face of one end of the segment is not supported, and the segment will move axially due to uneven force

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