A high-efficiency non-trench excavation device and method for excavating tunnels thereof

Abstract

The present invention relates to the technical field of tunnel excavation, in particular to an efficient non-excavation excavation device and a method for excavating a tunnel, which includes: a cylindrical non-excavation excavation device, the non-excavation excavation device has an upper, middle, lower rear The four parts excavate the soil layer in blocks and construct the lining body. The upper part of the non-opening excavation device can reach into the soil layer for excavation and transport the excavated sand in large quantities. Even in the case of blockage, it can be easily Remove the blocked sand and soil; part of the non-excavation excavation device adopts a screw conveyor and a large cutter head to extend into the soil layer to discharge soil and leave it as a positioning guide rail for the upper and lower parts of the non-excavation excavation device; the present invention utilizes The core soil method of circular excavation processes the soil layer step by step. While increasing the diameter of the soil discharge pipe and improving the working performance of the soil discharge device, the working pressure of the soil discharge device is reduced by reducing the amount of soil discharged.

Description

technical field [0001] The invention relates to the field of trenchless excavation devices, in particular to an efficient trenchless excavation device and a method for excavating tunnels. Background technique [0002] In recent years, the annular shield construction method has been widely used during tunnel excavation. It adopts the following steps: first excavating the cross-section of the foundation corresponding to the position of the outer shell of the tunnel into an annular shape using a cylindrical excavation device; The process of constructing a lining body in a cylindrical shape at the excavated part is a process of obtaining a reaction force from the lining body and pushing the excavation device, so that the cross-section of the foundation is excavated into a ring shape, and then the excavation is carried out at the same time as it remains in a cylindrical shape. The rear side of the sand and soil inside the lining body is excavated to construct a tunnel (refer to P...

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Problems solved by technology

[0004] However, when such excavated soil discharge mechanisms such as discharge pipes or screw conveyors are installed in the device, it is necessary to make the excavated soil discharge mechanisms not interfere with excavation mechanisms, propulsion mechanisms, etc., so it is necessary to reduce the size of the discharge pipe, The diameter of the screw conveyor has the problem of not being able to transport a large amount of excavated soil;

[0005] In addition, there may also be the following problems: when the diameter of the discharge pipe and the screw conveyor is too small, sand and soil clogging will occur frequently; The inner shell of the device cannot remove the clogged sand

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