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Self-propelled grouting anchor rod for tunnel construction

A technology for grouting bolts and tunnel construction, which is used in the installation of bolts, mining equipment, earth-moving drilling, etc. to reduce the possibility, avoid the deviation of the advance angle, and maintain the advance angle.

Pending Publication Date: 2019-12-03
钟吉昌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a self-propelled grouting anchor for tunnel construction, which is intended to minimize the defect that the advance angle of the anchor will deviate during the construction process.

Method used

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  • Self-propelled grouting anchor rod for tunnel construction
  • Self-propelled grouting anchor rod for tunnel construction
  • Self-propelled grouting anchor rod for tunnel construction

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Embodiment Construction

[0021] The present invention will be described in further detail below by means of specific embodiments:

[0022] Such as figure 1 , figure 2 and image 3 Shown: a self-advancing grouting bolt for tunnel construction, including an inner drill pipe 1, an outer drill pipe 2, a grout plug 3, an anchor plate 4, a nut 5 and a grout plug 6. The so-called self-advancing grouting anchor, that is, the front end has a drill bit structure, and no separate drilling is required before construction. The inner drill rod 1 includes a first drill part 101 and a first drill body part 102. The first drill part 101 is located on the left side of the first drill body part 102. The two parts are coaxially connected in a detachable manner. In this case, the protruding part of the left end of the first drill body part 102 is provided with an external thread, and the first drill body part 102 is connected with the internal thread at the right end of the first drill part 101 through the external th...

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Abstract

The invention discloses a self-propelled grouting anchor rod for tunnel construction. The self-propelled grouting anchor rod for tunnel construction comprises an outer drill pipe, an inner drill pipe,a grouting-stopping plug connected to the inner drill pipe, an anchor bearing plate connected to the grouting-stopping plug, a nut connected to the anchor bearing plate and a grouting-stopping plug connected to the nut. The inner drill pipe comprises a first drill bit part and a first drill body part. The outer drill pipe comprises a second drill bit part and a second drill body part. A cross drilling tool is mounted on the second drill bit part. By introducing a water pressure in a crack of a rock layer, the self-propelled grouting anchor rod for tunnel construction is kept in an initial balanced state in an advancing process, so that angle deviation of the anchor rod in the advancing process is avoided effectively and the tunnel construction quality is improved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a self-advancing grouting anchor for tunnel construction. Background technique [0002] In tunnel construction, bolt support is widely used as the advanced support in tunnel construction because of its simple process and less consumables. Tunnel advance support, as the name suggests, is to support the excavated rock layer for the first time during tunnel construction, also commonly known as "initial support". Advance support is the excavation and support of the mountain or the underground rock layer in the primary support. In most cases, the mountain or the underground rock layer contains abundant groundwater, and some even have springs. [0003] During the construction of the existing anchor bolt advance support, the groundwater or the water rich in the gaps in the rock stratum all flow freely along the radial direction of the anchor bolt, and some water also flows ...

Claims

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Application Information

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IPC IPC(8): E21D20/02E21D21/00
CPCE21D20/021E21D21/0026E21D21/0093
Inventor 不公告发明人
Owner 钟吉昌
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