Apparatus for reducing friction resistance between shield machine shield body and tunneling wall

A device for reducing the frictional resistance between the shield machine shield body and tunneling wall applied in the technical field of tunnel driving; the device comprises shield body, steel pipe, valve, lubricant pipeline, distributor, pipeline, first control valve, second control valve, foam system pipeline, bentonite slurry system pipeline, tunnel wall and lubricant; one end of the valve is connected with the steel pile welded in the inside of the shield body and communicated with the tunneling wall; the other end of connected with the lubricant pipeline; the lubricant pipeline is communicated with the foam system pipeline and bentonite slurry system pipeline of the shield machine through the distributor, pipeline, first control valve and second control valve; the steel pipe is communicated with the tunneling wall through the hole of the shield body; the lubricant is injected between the tunnel wall and the shield body; when needs to injecting the lubricant, the valve is opened to inject the lubricant