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Construction method of super-long advanced anchor bars

A bolt construction, super-long technology, applied in the installation of bolts, drilling equipment and methods, earthwork drilling and mining, etc., can solve the problems affecting the construction progress, poor support effect, etc., to improve safety and easy to promote , The effect of simple operation process

Active Publication Date: 2013-09-18
THE FIRST ENG CO LTD OF CHINA RAILWAY NO 12 BUREAU GRP
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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 super-long lead bolt construction method in order to solve the problem that the support effect is not good and the construction progress is affected due to the short length of the lead small conduit in the advance support of the tunnel.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The construction method of the ultra-long advanced bolt comprises the following steps:

[0021] (1) Preparatory work: including working studio, building construction platform, erecting positioning arch, drilling rig in place, wherein when the drilling rig is in place, the drill pipe can pass through the reserved hole on the positioning arch, adjust the angle of the drill pipe, Then fix the position of the rig;

[0022] (2) Drilling and opening: Adjust the drilling rig according to the angle of the drill pipe before opening the hole. After the drill pipe with the impactor and the drill bit installed passes through the reserved hole of the positioning arch, the drill bit is placed on the face of the hole to be drilled. Use a ruler or connecting pipe to level the drill pipe, then adjust the drill pipe to an angle of 2° up, fix the drilling machine, and then open the air to drill;

[0023] (3) Connect the drill pipe and continue drilling: When the drill pipe is drilled 1m,...

Embodiment 2

[0029] The construction method of the ultra-long advanced bolt comprises the following steps:

[0030] (1) Preparatory work: including working studio, building construction platform, erecting positioning arch, drilling rig in place, wherein when the drilling rig is in place, the drill pipe can pass through the reserved hole on the positioning arch, adjust the angle of the drill pipe, Then fix the position of the rig;

[0031] (2) Drilling and opening: Adjust the drilling rig according to the angle of the drill pipe before opening the hole. After the drill pipe with the impactor and the drill bit installed passes through the reserved hole of the positioning arch, the drill bit is placed on the face of the hole to be drilled. Use a ruler or connecting pipe to level the drill pipe, then adjust the drill pipe to an angle of 3° up, fix the drilling machine, and then open the air to drill;

[0032] (3) Connect the drill pipe and continue drilling: when the drill pipe is drilled 1.5...

Embodiment 3

[0038] The construction method of the ultra-long advanced bolt comprises the following steps:

[0039] (1) Preparatory work: including working studio, building construction platform, erecting positioning arch, drilling rig in place, wherein when the drilling rig is in place, the drill pipe can pass through the reserved hole on the positioning arch, adjust the angle of the drill pipe, Then fix the position of the rig;

[0040] (2) Drilling and opening: Adjust the drilling rig according to the angle of the drill pipe before opening the hole. After the drill pipe with the impactor and the drill bit installed passes through the reserved hole of the positioning arch, the drill bit is placed on the face of the hole to be drilled. Use a ruler or connecting pipe to level the drill pipe, then adjust the drill pipe to an angle of 2° up, fix the drilling machine, and then open the air to drill;

[0041] (3) Connect the drill pipe and continue drilling: when the drill pipe is drilled 2m,...

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PUM

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Abstract

The invention discloses a construction method of an ultra-long lead bolt, relates to a method of advance support in tunnel construction, and solves the problem that the length of a small lead conduit in the advance support of the tunnel is too short and the support effect is not good, which affects the construction progress. Including preparatory work; tripping out the hole; connecting the drill pipe and continuing to drill to the design depth; washing the hole; withdrawing the drill pipe; Tighten the anchor rod and the connecting sleeve; advance the anchor rod grouting. The invention provides a new construction method for tunnel advance support construction, has a simple operation process and is easy to popularize, greatly reduces the probability of rock slippage and landslide during subsequent excavation, and improves construction safety.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and relates to a tunnel advance support method, in particular to an ultra-long advance bolt construction method. Background technique [0002] In soft rock tunnels, when the surrounding rock grade is V or above, the advance support is generally designed as a single-layer small conduit or double-layer small conduit, and the length of each row of small conduits is usually 3-5m. However, in the construction, part of the function of the advance support is often lost because the length of the advance small conduit is too short, and the effect is not good, and rocks may slide or even collapse in the subsequent excavation, and the frequency of the advance small conduit is not high. , increase the cycle time of the process and affect the construction progress. [0003] In order to make up for this safety defect in the advance support construction of weak surrounding rock, it is necessary to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D21/00E21B3/02
Inventor 姜军
Owner THE FIRST ENG CO LTD OF CHINA RAILWAY NO 12 BUREAU GRP