Shield tunneling machine for ultralarge U-shaped cross sections

Abstract

The invention discloses a shield tunneling machine for ultralarge U-shaped cross sections. The shield tunneling machine comprises a cutterhead device, a driving system, a shield structure, a main propelling system, screw conveyors, an equipment bridge, a backup system and a continuous belt conveyor. The cutterhead device is formed by nine spoke-type cutterheads, and driving shafts of the spoke-type cutterheads are parallel, wherein a medium-diameter spoke-type rear cutterhead is positioned at the center of a rear plane, three large-diameter spoke-type front cutterheads are positioned on two sides of the upper portion and the bottom of the middle of a front plane, three large-diameter spoke-type rear cutterheads are positioned on two sides of the upper portion and the bottom of the middle of the rear plane, and two small-diameter spoke-type rear cutterheads are symmetrically distributed at arch edge of the upper portion of the rear plane. The shield tunneling machine can be used for excavation of arched U-shaped cross sections of curved walls and is small in excavation dead zone and adaptive to geology of loess, silty clay, clay, silty sand, soft rock and the like, and the area utilization rate of tunnel cross sections is greatly increased. In addition, by the shield tunneling machine for the ultralarge U-shaped cross sections, construction cost is greatly reduced while construction efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction equipment, and in particular relates to a horseshoe-shaped shield machine with a super large section. Background technique [0002] In the current tunnel construction, shield tunneling technology has gradually been widely used due to its advantages of high degree of automation, high construction safety, fast construction progress, low pollution, and low cost. Among them, the shield machine is a highly mechanized and automated tunneling lining complete set of equipment that adopts the shield method and integrates mechanical, electronic, hydraulic, laser and control technologies. [0003] When a full-face shield machine is used to excavate a tunnel, the circular section cutter head is usually used for excavation, and the section excavated is circular. In a double-track railway tunnel, the bottom of the tunnel is relatively flat, and the circular section is not optimally designed. Theref...

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Problems solved by technology

[0003] When the full-face shield machine is used to excavate the tunnel, the circular section cutter head is usually used for excavation, and the section excavated is circular. In the double-track railway tunnel, the bottom of the tunnel is relatively flat, and the circular section is not optimally designed. Therefore, it is necessary to lay prefabricated inverted arch blocks at the bottom of the excavated circular cross-section roadway, but this process is not intended to waste the utilization rate of the excavated space

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