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Tunnel-entering construction method for tunnel

A construction method and hole-entry technology, applied in tunnels, tunnel linings, earth-moving drilling and mining, etc., to achieve the effect of reducing the amount of excavation, protecting from damage, and safely entering the hole

Inactive Publication Date: 2011-09-14
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after the appearance of the "pre-hole method", other projects are rarely researched and practiced.

Method used

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  • Tunnel-entering construction method for tunnel

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Embodiment Construction

[0051]The tunnel entry construction method of the present invention is as follows: the entry method is determined according to the angle at which the axis of the tunnel opening intersects the ground contour. Among them, the applicable condition for orthogonal entry is that the angle between the axis of the hole and the ground contour is more than 40°, and the condition for oblique entry is that the angle is less than 40°, and the oblique angle is between 20°-40° When the angle is less than 20°, the "half arch method" can be used. When the angle is less than 20°, the shed-hole method should be used.

[0052] The specific technical solutions are:

[0053] Tunnel drilling methods can be divided into orthogonal drilling, oblique drilling, lateral drilling and one-way drilling (see figure 1 , image 3 and Image 6 ), the applicable condition for orthogonal entry is that the intersection angle between the axis of the tunnel opening and the contour line of the ground is more than ...

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Abstract

The invention relates to a tunnel-entering construction method for a tunnel, which can reduce the construction difficulty when being applied to construction, and is beneficial to ensuring the construction safety and the structural stability. The tunnel entering method is determined according to an intersected angle of the axis of a tunnel entrance and a ground contour line, and includes orthogonal tunnel entering construction, oblique crossing tunnel entering construction, lateral tunnel entering construction and single-direction tunnel entering construction. The application condition of the orthogonal tunnel entering construction is that the intersected angle of the axis of the tunnel entrance and the ground contour line is larger than 40 degrees; and the application condition of the oblique crossing tunnel entering construction is that the intersected angle of the axis of the tunnel entrance and the ground contour line is smaller than 40 degrees. When the oblique crossing angle is 20 to 40 degrees, a half protective arch method is adopted; and when the intersected angle of the axis of the tunnel entrance and the ground contour line is smaller than 20 degrees, a shed tunnel method is adopted.

Description

1. Technical field: [0001] The invention relates to a tunnel construction method, in particular to a tunnel entry construction method. 2. Background technology: [0002] In the background technology, due to the complexity of tunnel entry, my country has been conducting unremitting research and exploration on tunnel entry methods from the beginning of tunnel construction to the present. It has experienced "late entry and late exit", "early entry and late exit", and now "zero excavation", that is, the engineering concept of the entrance has experienced the process of "emphasis on economy→emphasis on safety→emphasis on environmental protection". The corresponding tunnel entry method has also gone through three stages: "big excavation entry→open hole entry→advance support entry". [0003] (1) Large excavation into the hole [0004] In the past, in order to shorten the length of the tunnel, the location of the entrance was selected at the equivalent point of the tunnel and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/10E21D11/18
Inventor 陈建勋胡平韩剑乔雄罗彦斌
Owner CHANGAN UNIV
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