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Advanced grouting drill pipe

A technology of advanced grouting and drill pipe, which is applied in the direction of drill pipe, drill pipe, earthwork drilling, etc., can solve problems such as clogging, and achieve the effect of simple and effective operation, prevention of clogging, and simple and effective structure

Pending Publication Date: 2020-01-03
CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides an advanced grouting drill pipe, which realizes the sealing of external rock or soil through the rotational cooperation between the drilling outer pipe and the grouting inner pipe, and at the same time The first anti-backflow assembly is installed between the pipe and the grouting inner pipe, and the second anti-backflow assembly is installed inside the grouting inner pipe. The force of the grout flowing in the pipe is used to prevent drilling inside the outer pipe and the grouting inner pipe. The backflow of the grout effectively solves the problem of blockage caused by foreign impurities entering the drill pipe and prevents the backflow of the grouting fluid

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment provides an advanced grouting drill pipe, which includes a drill pipe head 1 and an extension 2 detachably connected to the drill pipe head 1. Both the drill pipe head 1 and the extension 2 include a drilling outer pipe 3 and The grouting inner pipe 4 arranged inside the drilling outer pipe 3, the extension part 2 includes an extension part outer pipe 29 and an extension part inner pipe 30 arranged inside the extension part outer pipe 29, and the drilling outer pipe 3 is provided with a plurality of The first grouting hole 5 communicating with the inside of the drilling outer tube 3, the grouting inner tube 4 is provided with a plurality of second grouting holes 6 communicating with the grouting inner tube 4, the grouting inner tube 4 A plugging head 7 is arranged along the outer wall, and a first backflow prevention assembly 9 is provided inside the extension outer tube 29. The first backflow prevention assembly 9 includes a plurality of limiting blades ...

Embodiment 2

[0052] This embodiment is further optimized on the basis of Embodiment 1. Specifically, the outer casing of the grouting inner pipe 4 is provided with a bearing 12, and the inner wall of the drilling outer pipe 3 is evenly provided with a plurality of reinforcing rods 13, The other ends of the plurality of reinforcing rods 13 are fixedly connected to the outer ring of the bearing; by arranging a rubber layer on the straight edge of the limiting blade 10 and a rubber layer on the edge of the second limiting blade 19, the multiple limiting blades 10 are strengthened Under the action of the backflow slurry, when the state of being close to each other is produced, a good sealing effect can be achieved between the two adjacent limiting blades 10, thereby achieving a good effect of preventing backflow;

[0053] As a preferred technical solution of this embodiment: the limiting blades 10 and the second limiting blades 19 are all set in the shape of a spherical fan, and when a pluralit...

Embodiment 3

[0055] This embodiment is further optimized on the basis of Embodiment 1. The outer casing of the grouting inner pipe 4 is provided with a bearing 12, and the inner wall of the drilling outer pipe 3 is evenly provided with a plurality of reinforcing rods 13, and the plurality of The other end of the reinforcement rod 13 is fixedly connected to the outer ring of the bearing; by arranging a rubber layer on the straight edge of the spacer blade 10 and a rubber layer on the edge of the second spacer blade 19, the multiple spacer blades 10 are strengthened in the return slurry Under the action of each other, when the state of being close to each other is produced, a good sealing effect can be achieved between the two adjacent limiting blades 10, thereby achieving a good effect of preventing backflow;

[0056] As a preferred technical solution of this embodiment: the plurality of reinforcing rods 13 fixedly connected to the outer ring of the bearing 12 are all carbon fiber materials,...

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Abstract

The invention discloses an advanced grouting drill pipe, belongs to a drill rod in the technical field of architectural engineering, and aims to prevent the backflow problem of grouting liquid. The advanced grouting drill pipe comprises a drill rod head part, and a lengthening part detachably communicating with the drill rod head part; the drill rod head part and the lengthening part both comprisedrilling outer pipes, and grouting inner pipes arranged in the drilling outer pipes; the drilling outer pipes are provided with multiple first pulp outlet holes communicating with the internals of the drilling outer pipes; the grouting inner pipes are provided with second pulp outlet holes communicating with the internals of the grouting inner pipes; blockage heads are arranged along the outer walls of the grouting inner pipes; and first backflow preventing modules are arranged in the drilling outer pipes of the lengthening part. The advanced grouting drill pipe adopts acting force of pulp flowing in the pipes to prevent the backflow of the pulp in the drilling outer pipes and in the grouting inner pipes, and effectively solves the problems of blockage in the drill rod due to feeding of external impurities and backflow of grouting liquid.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to an advanced grouting drill pipe. Background technique [0002] The shield tunneling method has the characteristics of high construction safety, less ground traffic interference, and small impact on the surrounding environment. It is the main construction method of tunnel engineering. The traditional method generally adopts ground grouting reinforcement technology. However, when the tunnel is deeply buried, the underground construction conditions are relatively complicated, or the ground does not have the construction conditions, etc., underground grouting reinforcement technology is required. Therefore, effective underground reinforcement of the weak ground in front of the shield is one of the important tasks to ensure the safe construction of the shield; the principle of the grouting method is to inject cementitious grouting materials into the ground to change ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B17/00E21D9/00
CPCE21B17/00E21D9/001
Inventor 李清宪祁宝成幸智军王建伟许晨王宁李怀滨秦朋飞芦建广朱明辉
Owner CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP