Cutter head with shield clamping prevention function, tunnel boring machine and construction method
The invention relates to the field of tunnel full-section tunneling construction, in particular to a cutterhead with a shield clamping prevention function, a tunnel boring machine and a construction method. The method comprises the following steps that in the tunneling process, according to the tren...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention relates to the field of tunnel full-section tunneling construction, in particular to a cutterhead with a shield clamping prevention function, a tunnel boring machine and a construction method. The method comprises the following steps that in the tunneling process, according to the trend that a gap between a tunnel wall and a shield body becomes small and/or the gap between the shield body, the part, where the shield is prone to being clamped, of the tunnel wall is subjected to over-excavation through a cutter head over-excavation cutter, and the diameter of the part, supporting the shield body, of the bottom of the tunnel wall is kept so as to prevent the tunneling machine from heading till the tunneling machine passes through an excavation section with the shield clamping risk. Over-excavation is only conducted on the position, where a shield is prone to being clamped, of the tunnel wall through the cutter head over-excavation cutter, meanwhile, the size of the bottom of the tunnel wall is kept |
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