New type grouting device with fixed point control area

Abstract

The invention discloses a novel fixed point area control grouting device which comprises an auxiliary pipe, a grouting pipe and an injection hole formed in the grouting pipe. The injection hole is circular or oval or square or rectangular. One end of the grouting pipe is conic. The grouting pipe is directly inserted into the auxiliary pipe and located in the auxiliary pipe expect for the conic end. The gradient between the end of the auxiliary pipe and the horizontal plane is 15 degrees to 30 degrees. The novel fixed point area control grouting device has the advantages that a key point weak area can be directly reinforced, the re-drilling amount is reduced, the frequency of occurrence of drill holding accidents is greatly reduced, a construction period is shortened, the grouting cost is saved, and the grouting effect is improved; the novel fixed point area control grouting device is simple in structure and suitable for being manufactured in a site, the grouting pipe can be recycled, a plastic pipe is low in price, and the cost of the novel fixed point area control grouting pipe is remarkably reduced; the auxiliary pipe remaining in a drill hole is good in drillability, the drill hole can be reused, and following drill hole construction is not influenced.

Description

technical field [0001] The invention relates to a grouting device, in particular to a novel grouting device with fixed-point control area. Background technique [0002] Casing sealing is mostly used in grouting projects, and progressive grouting in open holes cannot achieve enhanced grouting in fixed-point areas. In addition, the amount of re-drilling in the grouting process is large, the required construction period is long, the economic benefit is poor, and the grouting effect is difficult to guarantee. When the surrounding rock is soft and broken, there is a problem that the frequency of hole collapse and holding drill accidents will increase significantly due to the large amount of re-drilling, and it is difficult to control the spread of grout due to the collapse of the borehole. When the weak areas of the grouting project use fixed-point control of the steel pipe directly to strengthen the grouting, the drill hole and the steel pipe cannot be reused, the economic benef...

AI Technical Summary

Problems solved by technology

[0002] Casing sealing is mostly used in grouting projects, and forward-type grouting in open holes cannot achieve enhanced grouting in fixed-point areas. In addition, the amount of re-drilling during the grouting process is large, the required construction period is long, the economic benefit is poor, and the grouting effect is difficult to guarantee.

When the surrounding rock is soft and broken, there is a problem that the frequency of hole collapse and holding drill accidents increases significantly due to the large amount of re-drilling, and it is difficult to control the spread of grout due to the collapse of the borehole

When the weak areas of the grouting project are directly lowered with steel pipes and fixed-point controlled areas to strengthen the grouting, the drill holes and the steel pipes cannot be reused, and the economic benefits are poor, and there are problems that the steel pipes remaining in the surrounding rock area will affect the subsequent surrounding drilling construction.

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