Earth pressure balance type annular shield machine

Abstract

The invention relates to an earth pressure balance type annular shield machine. The shield machine comprises a shield machine shell, an annular knife disc, an earth pressure cabin, a screw conveyer, thrust cylinders, a gasket, a pipe piece disassembling machine, a pipe piece assembling machine and a sealing brush, wherein the annular knife disc is arranged at the front part of the shield machine shell, and the earth pressure cabin is arranged at the rear part of the annular knife disc; the screw conveyer is arranged at the lower part of the shield machine shell, and the thrust cylinders are uniformly distributed around the shield machine shell; the gasket is a nitrile rubber corrugated pipe inflatable gasket, and the side part of the gasket is provided with a gasket jack; the pipe piece disassembling machine is arranged at the front end of the upper part of the screw conveyer; the pipe piece assembling machine is arranged behind the pipe piece disassembling machine; and the gasket brush is arranged at the tail part of the shield machine. Compared with the prior art, the earth pressure balance type annular shield machine can be used for excavating tunnels with different diameters as required, the range of applicable soil layers is wide, the earth pressure in the earth cabin is maintained through the expansion and contraction of compressed air, and the functions of sealing and water stopping are realized.

Description

technical field [0001] The invention relates to shield equipment, in particular to an earth pressure balance annular shield machine. Background technique [0002] Shield method tunnel construction has the advantages of less interference to the surrounding environment, fast construction speed, safety and reliability, and high degree of mechanization and automation. It has become a commonly used construction method for urban soft soil tunnel construction today. Correspondingly, the types of shield machines suitable for different formation conditions have also been greatly developed. The earth pressure balance shield machine was first developed and applied by Japan in the 1970s, and it was born after the mud-water pressurized shield machine came out. A new type of shield tunneling, which avoids the important disadvantages of local air pressure shield tunneling, and also omits the transportation and treatment equipment required for large-investment mud-water shield tunneling, an...

AI Technical Summary

Problems solved by technology

However, in the future when the urban underground space is about to become saturated, on the one hand, changing the route will inevitably lead to more crowded underground space, and increasing the excavation depth will inevitably lead to increased construction difficulty and risk; on the other hand, abandoned tunnels will inevitably Occupying valuable underground space, at the same time, abandoned tunnels may be destroyed and fail at any time, causing deformation of the surrounding soil and affecting the safety of adjacent pipelines or buildings, which is a great potential risk

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