Super-large diameter shield cutterhead system used in hard-soft heterogeneous ground

Abstract

The invention discloses a super-large diameter shield cutterhead system used in a hard-soft heterogeneous ground. The super-large diameter shield cutterhead system comprises large-size cutterheads, a medium-size cutterhead, small-size cutterheads, spokes, a panel, a hob, a cutting knife, a leading knife, a center knife, a stirring rod, a reducer, a hydraulic motor, a power transmitting device, a shield and a spiral unearthing device; the front end cutterhead of the shield is nine cutterheads which are formed and arranged in a spatial crossing structure, and is divided into four-order cutterheads including the large-size cutterheads, the medium-size cutterhead, and the small-size cutterheads; the four-order cutterheads comprises a first-order cutterhead, second-order cutterheads, third-order cutterheads, and fourth-order cutterheads. According to the super-large diameter shield cutterhead system used in the hard-soft heterogeneous ground, multiple layers of cutterheads are distributed in a spatial crossing mode, each cutterhead can achieve individual control, and thus the excavation efficiency, precision and stability of the super-large diameter shield in construction of the hard-soft heterogeneous ground are improved. The use of a large diameter mainshaft bearing is prevented, and the manufacturing difficulty and transportation cost are lowered; through the adoption of the multiple layers of the cutterheads, loads of each part are lowered, and the service life of relevant parts of the cutterheads is prolonged.

Description

technical field [0001] The invention relates to the technical field of special engineering equipment for tunnels, in particular to an ultra-large-diameter shield machine cutter head system used in soft and hard uneven strata. Background technique [0002] Shield boring machine is a large-scale construction equipment used in tunnel excavation. It has the advantages of fast excavation speed, high quality and environmental protection, economical and labor-saving, safe and reliable, and has been widely used in subway highways and municipal hydropower tunnel projects. Among them, the cutter head is an important part of the shield excavation construction. Its main function is to cut the soil layer and play a certain role in supporting the excavation surface; therefore, the design rationality of the cutter head structure directly affects the tunnel construction quality and the use of the shield machine. life. [0003] With the increase in the scale of projects such as large-diamet...

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Problems solved by technology

[0005] In order to overcome the phenomenon of “unbalanced load” caused by the uneven force on the cutter head in the super-large diameter shield in the soft and hard stratum in the above-mentioned prior art, the poor working stability of the shield machine and the difficulty in manufacturing the large-diameter ma

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