Soil pressure balance shield tunneling machine cutter head for soft soil layer bench cut method construction

Abstract

The invention relates to the technical field of shield tunneling machines, in particular to a soil pressure balance shield tunneling machine cutter head for soft soil layer bench cut method construction. The soil pressure balance shield tunneling machine cutter head includes a plurality of transmitting devices installed on a soil warehouse separating plate, the transmitting devices correspondinglydrive a plurality of cutter heads on the front end of a shield tunneling machine, each transmitting device includes a reducer installed to a motor, the reducer is installed at the input end of a gearbox through a shaft, a transmitting shaft used for installing the cutter heads is installed at the output end of the gear box, the length of a transmitting shaft located on an upper semicircle of theshield tunneling machine is larger than that of a transmitting shaft located on a lower semicircle of the shield tunneling machine, the distance between cutter heads installed on the upper semi-circular transmitting shaft of the shield tunneling machine and the soil warehouse separating plate is larger than the distance between cutter heads installed on the lower semi-circular transmitting shaftof the shield tunneling machine, the upper semi-circular cutter heads and the lower semi-circular cutter heads are staggered to achieve bench cut method excavation, through the matched excavation of the multiple cutter heads, the disturbance to surrounding soil bodies is small, and through the bench cut method excavation, the stability of a palm face is improved and the problem that the ground isprone to being settled is avoided as much as possible.

Description

technical field [0001] The invention relates to the technical field of shield machines, in particular to an earth pressure balance shield machine cutterhead used for construction in soft soil layers by step method. Background technique [0002] The shield machine is a kind of professional equipment for tunneling, which is widely used in the construction of subway tunnels. According to the different strata, it is necessary to customize the corresponding shield machine. For soft soil formations, a single circular cutterhead shield machine is routinely used at present. However, its cutter head and drive structure are complicated, and the equipped torque is relatively large. For soft ground, there is a problem of configuration waste. The torque of a single circular cutter head cannot be offset, and the disturbance to the surrounding soil is large, which is prone to land subsidence . Contents of the invention [0003] Aiming at the problems existing in the prior art, the pre...

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Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention provides an earth pressure balance shield machine cutterhead used for the step method construction in soft soil layers, which avoids as far as possible the inability to offset the torque of the cutterhead in the prior art, and damages the surrounding soil. The disturbance of the body is relatively large, and the problem of ground subsidence is prone to exist, and the cutter head of the earth pressure balance shield machine used for the construction of the soft soil layer by the step method of the present invention forms a step excavation, which improves the stability of the tunnel face

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