Roadheaders and tunnel boring methods

By installing a telescopic excavation part on the excavator, the annular trough is excavated to carry the deformation of the tunnel, which solves the problems of slow construction progress and high accidents caused by the large deformation of the soft rock in the tunnel, and improves the construction speed and saves the construction period.

CN111608674BActive Publication Date: 2025-03-18CHINA RAILWAY CONSTR HEAVY IND
5 Cites 0 Cited by

Patent Information

Application Number
CN202010604235.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2020-06-29
Publication Date
2025-03-18
Estimated Expiration
2040-06-29

AI Technical Summary

Technical Problem

The large deformation of the soft rock in the tunnel leads to slow construction progress, which seriously restricts the project construction period and makes it difficult for the support structure to effectively reduce the incidence of accidents.

Method used

A boring machine is designed, equipped with a cutting board, a boring tool and a telescopic excavation part. The telescopic excavation part digs an annular groove on the inner wall of the tunnel to reduce the bearing pressure of the support structure and carry the deformation of the tunnel through the annular groove.

Benefits of technology

It improves the construction speed, saves the construction period, and effectively reduces the incidence of accidents caused by weak surrounding rocks.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The present invention relates to the technical field of tunnel excavation, and specifically provides a tunnel boring machine and a tunnel excavation method for excavating a tunnel. The tunnel boring machine includes: a cutterhead having a cutterhead body; an excavation tool disposed at one end of the cutterhead body and capable of excavating a tunnel; a telescopic excavation part connected to the outer wall of the cutterhead body; wherein the telescopic excavation part extends out of the outer wall of the cutterhead body in a first state to excavate an annular groove on the inner wall of the tunnel, and the telescopic excavation part retracts into the outer wall of the cutterhead body in a second state. The excavation method includes: controlling the excavation tool to excavate the tunnel; controlling the telescopic excavation part to excavate an annular groove on the inner wall of the tunnel. The annular groove can bear the deformation of the tunnel, occupies little space, and enables the deformation released by the tunnel to start from the annular groove, which can further ensure the construction safety of the soft rock tunnel.
Need to check novelty before this filing date? Find Prior Art