Control device for preventing duct piece staggering and shield tail postures for TBM

Abstract

The invention discloses a control device for preventing duct piece staggering and shield tail postures for a tunnel boring machine (TBM). A plurality of the control devices are uniformly distributed on an excircle surface of a shield tail at the rear part of a shield tail brush in a manner of surrounding the axis of the shield tail; each control device comprises a streamline wear-resisting plate,a shield body posture adjusting oil cylinder, an oil cylinder connecting plate and a pipe piece supporting plate; the upper surface of the oil cylinder connecting plate is stopped in the shield tail through the shield tail outer shell; the upper surface of the duct piece supporting plate is an arc-shaped concave surface; the circle center of a circle defined by the upper surfaces of all the duct piece supporting plates coincides with the circle center of the cross section of the shield tail; the bottom of the duct piece supporting plate is hinged to the telescopic rod end of the duct piece posture adjusting oil cylinder, and the hinged point of the duct piece supporting plate and the telescopic rod end of the duct piece posture adjusting oil cylinder coincides with the symmetric center line of the arc inward-concave face of the upper surface of the duct piece supporting plate.

Description

Technical field [0001] The invention belongs to the technical field of TBM construction and the field of TBM equipment design, and specifically relates to a control device for preventing the misalignment of tube segments and the posture of shield tail for TBM. Tunneling under small radius conditions. Background technique [0002] TBM is the abbreviation of rock tunnel boring machine, which is widely used in mountain tunnel construction. With the development of urban subways, TBM is gradually applied to subway construction in rocky areas. Among them, shield TBM has become the first choice for urban subways in rock formations due to its excellent tunneling speed and good construction environment. However, due to the high standards of urban subway design and acceptance, shield-type TBM uses shield tail brushes to assist in adjusting the shield tail posture and segment posture during the design. Under long-term harsh environments, shield tail brush failure often occurs, and shield ...

AI Technical Summary

Problems solved by technology

However, due to the high standards for the design and acceptance of urban subways, the shield tail brush is used to assist in adjusting the shield tail posture and segment posture during the design of the shield TBM. In the long-term harsh environment, the failure of the shield tail brush often occurs, and the shield tail posture also difficult to control

Due to the mechanical design problems of the shield-type TBM, the segment misalignment is more serious, and the segment misalignment often exceeds the specification during the acceptance of the subway, and the relevant construction unit even performs secondary plastic treatment, which wastes funds and delays the construction period.

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