Shield tunneling machine cutterhead suitable for expansible old clay

Abstract

The invention discloses a shield tunneling machine cutterhead suitable for expansible old clay. The shield tunneling machine cutterhead comprises a cutterhead body, a combined faceplate is arranged at the center of the cutterhead body, four main ribbed plates and four spokes are arranged around the combined faceplate, the main ribbed plates and the combined faceplate are connected to form a cross, the spokes are arranged on the cutterhead body between each two adjacent main ribbed plates, the tail ends of the spokes are fixed to the combined faceplate, the spokes and the main ribbed plates are fixed through steel grids which are annularly arranged at intervals, a reinforced central fishtail scraper which is arranged along the diameter direction is mounted at the center of the combined faceplate, and the reinforced central fishtail scraper is coincident with a central line of the two main ribbed plates on a same straight line. The shield tunneling machine is novel in structural design, aperture rate of the cutterhead is increased, fluidity of muck is improved, probability of forming a mud cake on the cutter head is avoided, cutting track and cutting sequence of the cutterhead are optimized, wear resistance of the whole cutterhead is improved, adaptability of a shield tunneling machine in expanding oil clay is improved effectively, and shield tunneling construction efficiency is improved.

Description

Technical field: [0001] The invention relates to a formation shield cutter head, in particular to a shield machine cutter head suitable for expansive old clay. Background technique: [0002] The shield method is a commonly used construction method in the construction of urban subway tunnels. Due to the differences in geological conditions in different regions, there are also huge differences in the structure and parameter requirements of the shield machine cutter head. [0003] At present, for shield excavation in general soft soil layers, there are relatively mature experiences. However, for the expansive old clay stratum, the existing shield machine cannot fully adapt to it, and abnormal wear of the cutterhead and cutter often occurs, and the distribution of the fishtail scraper, tooth cutter, edge scraper, tearing cutter, etc. in the cutter is reasonable. And the firmness of the installation can not meet the requirements, especially the phenomenon of mud cake is extreme...

AI Technical Summary

Problems solved by technology

However, for the expansive old clay stratum, the existing shield machine cannot fully adapt to it, and abnormal wear of the cutterhead and cutter often occurs, and the distribution of the fishtail scraper, tooth cutter, edge scraper, tearing cutter, etc. in the cutter is reasonable. And the firmness of the installation can not meet the requirements, especially the phenomenon of mud cake is extremely easy to appear, which seriously affects the efficiency of shield construction

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