Die-mixing shield tunneling machine

Abstract

The invention provides a die-mixing shield tunneling machine. The die-mixing shield tunneling machine comprises a shield shell, a cutter disc, a soil bin, a spiral conveyor, an injection device, a propulsion unit, a belt conveyor, a steel wire shield tail sealing brush, a sensor system and a controller. The injection device comprises a slurry injection device, a foam injection device, a gas injection device, a conveying pipe and a control valve. The gas injection device communicates with the conveying pipe, the slurry injection device and the foam injection device are connected with the conveying pipe through pipes, and the conveying pipe is connected with the soil bin. The control valve is arranged on the junction of the slurry injection device, the foam injection device and the gas injection device. The controller is connected with the sensor system and the control valve separately and receives an electric signal transmitted by the sensor system, so as to control the control valve tobe switched on or switched off, and thus the slurry injection device or the foam injection device or the gas injection device communicates with the soil bin.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a mixed-mode shield machine. Background technique [0002] As a special equipment for tunnel construction, the shield machine has the best applicable ground for each form of shield. With the increasing complexity of tunnel geological conditions, especially for tunnel projects crossing rivers and seas, if the geology is single, it is not a problem to use a conventional single mode of shield tunneling. However, in the same tender section, the geological conditions often vary greatly. In the process of shield tunneling construction, some sections are suitable for tunnel construction with earth pressure balance mode, while others are suitable for tunnel construction with mud-water balance mode. If a single-mode earth pressure balance shield or mud-water balance shield is used for construction, there may be many problems. [0003] For the cross-river tunnel similar to Nanning Li...

AI Technical Summary

Problems solved by technology

Crossing requires strict control of surface subsidence to prevent ground breakdown. Therefore, it is necessary to use an air-cushioned mud-water balance shield. The round gravel stratum is connected to the Yongjiang River. If the earth pressure shield is used for excavation, the screw conveyor is prone to gushing and construction risks. Slurry-water shield construction is required; full-section mudstone formations are prone to mud cake formation on the cutter head, and mud-water separation is difficult, and mud-water shield tunneling efficiency is low, so earth pressure shield tunneling is required

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