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Tunnel excavation method

A technology for tunnel excavation and tunneling, applied in the field of tunnel excavation, can solve problems such as landslides, tunnel excavation construction safety accidents, affecting the work and life of urban people, etc., to achieve fast construction speed, save the amount of shotcrete, and avoid landslides or rock collapses Effect

Inactive Publication Date: 2020-03-24
MCC COMM CONSTR GRP CO LTD
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Problems solved by technology

The blasting excavation method is usually used for rock mass with relatively hard surrounding rock, but blasting in cities or areas with broken zones in rock mass will seriously affect the work and life of urban people, and blasting in rock masses with broken zones will make The vibration of the mountain body causes landslides or landslides, causing safety accidents in tunnel excavation construction

Method used

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Embodiment Construction

[0024] Embodiments of the tunnel excavation method according to the present invention will be described below with reference to the accompanying drawings. Those skilled in the art would recognize that the described embodiments can be modified in various ways or combinations thereof without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Also, in this specification, the drawings are not drawn to scale, and like reference numerals denote like parts.

[0025] A kind of tunnel excavation method, its construction steps are as follows Figure 5 shown, including the following steps:

[0026] S1, using the coring bit of the rock coring machine to perform coring operations along the contour line of the tunnel face and the criss-cross lines within the contour line of the tunnel face. Wherein, the core drill bit is a cylindrical drill bit penetrating along the ...

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Abstract

The invention discloses a tunnel excavation method. The method comprises the steps that S1, coring operation is carried out by adopting a coring bit along a tunnel face contour line and multiple crisscross lines in the tunnel face contour line, the coring bit is coaxially connected with a coring cylinder, a cylindrical core is drilled into the coring cylinder, cut off and taken out of a tunnel, crisscross grooves along the tunnel face contour line and in the tunnel face contour line are formed, and the tunnel is cut into multiple cylindrical residual rock masses; S2, the residual rock masses are extruded in the grooves respectively through an extruding and expanding device until the joints of the residual rock masses and the tunnel are extruded and cut off, and the residual rock masses aretaken out of a tunnel face; and S3, the step S1 and the step S2 are repeated until excavation construction of the whole tunnel is completed. The method avoids influences of shock waves or noise caused by blasting on buildings and citizens, and the risk of landslide or rock collapse is reduced. The residual rock masses can be used for building walls of cover plate culverts and stone arch culvertsor retaining walls of roadbed cutting slopes.

Description

technical field [0001] The invention relates to the field of tunnel engineering construction, in particular to a tunnel excavation method. Background technique [0002] Tunnel is a common building in highway, railway and municipal road engineering, and tunnel excavation methods include new Austrian method, mine method, shallow buried excavation method, spray anchor underground excavation method. Specific excavation methods include manual excavation, rock blasting, mechanical excavation, and shield excavation. The blasting excavation method is usually used for rock mass with relatively hard surrounding rock, but blasting in cities or areas with broken zones in rock mass will seriously affect the work and life of urban people, and blasting in rock masses with broken zones will make The vibration of the mountain body causes landslides or landslides, resulting in safety accidents in tunnel excavation. Contents of the invention [0003] In order to solve the above problems, t...

Claims

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Application Information

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IPC IPC(8): E21D9/10
CPCE21D9/1006
Inventor 刘思谋
Owner MCC COMM CONSTR GRP CO LTD
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