Device and method for enabling jet flow to cooperate with heading machine to penetrate through underground diaphragm wall

By using the telescopic nozzle and reciprocating drive mechanism of the jet-coordinated tunneling machine, the steel bars can be cut quickly and ahead of time, which solves the problem of steel bar cutting difficulties when tunneling machines pass through underground continuous walls, and improves cutting efficiency and equipment safety.

CN121556880APending Publication Date: 2026-02-24CHINA RAILWAY TUNNEL GROUP CO LTD +3
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Patent Information

Application Number
CN202511584026.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-31
Publication Date
2026-02-24

AI Technical Summary

Technical Problem

When existing tunnel boring machines pass through underground continuous walls, they face difficulties in cutting steel bars and the cutting length is large, resulting in low transmission efficiency of screw conveyors, which may cause structural vibration and safety risks to the station.

Method used

The jet-assisted tunneling machine device, including a telescopic nozzle and a reciprocating drive mechanism, is used to achieve advanced and rapid cutting of steel bars through the telescopic nozzle. The cutting method combines abrasive jet and pure water jet to avoid mixing and agglomeration of steel bars.

Benefits of technology

It effectively shortens the cutting length of steel bars, reduces disturbance to tunnel boring machines, ensures cutting effect and equipment safety, improves the slag discharge efficiency of screw conveyors, and reduces the vibration risk to station structures.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention relates to a device and method for a jet flow coordinated heading machine to penetrate through an underground diaphragm wall, the device for the jet flow coordinated heading machine to penetrate through the underground diaphragm wall comprises a cutter head, a cutter head cutter and a telescopic spray head, the cutter head cutter is arranged on the cutter head, the cutter head is provided with a telescopic hole position used for installing the telescopic spray head, and the axis of the telescopic hole position extends in the front-back direction; a reciprocating driving mechanism is installed in the telescopic hole site and used for driving the telescopic nozzle to stretch and retract front and back along the telescopic hole site. The telescopic nozzle can realize advanced rapid cutting of a front reinforcing steel bar structure, so that stirring and aggregation of reinforcing steel bars during rotary cutting of the cutterhead cutter are avoided, the cutting length of the reinforcing steel bars is reduced, and smooth deslagging of a spiral conveyor of the tunnel boring machine is facilitated; the technical problems that steel bars are difficult to cut and the cutting length of the steel bars is large in the process that an existing tunnel boring machine penetrates through an underground diaphragm wall are solved.
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