Earth pressure TBM dual-mode dual-support heading machine and construction method

Abstract

The invention discloses an earth pressure TBM double-mode double-support heading machine and a construction method. The earth pressure TBM double-mode double-support heading machine comprises a cutterhead, a shield body, a belt conveyor, a main drive used for driving the cutterhead, a propelling part used for pushing the cutterhead to move, a central screw conveyor used in a TBM mode, a shotcrete anchor support assembly used in the TBM mode, a bottom screw conveyor used in an earth pressure mode and a segment erector are used in the earth pressure mode. The central screw conveyor and the bottom screw conveyor are arranged in a crossed mode, a screw shaft of the central screw conveyor and a screw shaft of the bottom screw conveyor can alternatively move to a working position, and the belt conveyor is positioned at the tail parts of the central screw conveyor and the bottom screw conveyor. According to the earth pressure TBM dual-mode and dual-support tunneling machine, earth pressure and TBM dual-mode propelling is adopted, higher geological adaptability is achieved, the central screw conveyor and the bottom screw conveyor are arranged in a crossed mode, structural interference is avoided, one of the central screw conveyor and the bottom screw conveyor can be selected to move to the working position, mode conversion is convenient, and operability is high.

Description

technical field [0001] The invention relates to the field of excavation equipment, in particular to an earth pressure TBM dual-mode dual-support excavator and a construction method. Background technique [0002] Today, with the continuous development of tunneling technology, the excavation process often needs to face more complex geological and hydrological conditions. In the construction in the composite stratum with alternating soft and hard layers, the single-mode shield machine is often difficult to meet the construction requirements due to poor geological adaptability. However, if the composite shield machine adopts a single support scheme, it has the disadvantage of high construction cost. [0003] The earth pressure TBM dual-mode shield machine used in the prior art has a long mode switching time and low construction efficiency. At the same time, the tunnel water inrush emergency capability is weak, and the inner seal of the main drive is easy to wear; while the comp...

AI Technical Summary

Problems solved by technology

In the construction in the composite stratum with alternating soft and hard layers, the single-mode shield machine is often difficult to meet the construction requirements due to poor geological adaptability

However, if the composite shield machine adopts a single support scheme, it has the disadvantage of high construction cost

[0003] The earth pressure TBM dual-mode shield machine used in the prior art has a long mode switching time and low construction efficiency. At the same time, the tunnel water inrush emergency capability is weak, and the inner seal of the main drive is easy to wear; while the composite shield machine generally uses a single Segment support form, high construction cost

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