Rapid grouting method of deep overburden layer

A deep covering layer and fast technology, applied in construction, infrastructure engineering and other directions, can solve the problems of low work efficiency and high accident rate, and achieve the effect of improving construction work efficiency, improving hole-forming work efficiency, and reducing the accident rate in the hole.

Active Publication Date: 2017-05-10
GEZHOUBA GROUP FOUND ENG
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fast grouting method for deep overburden, by organically combining the advantages of the orifice sealing grouting method and the casing valve grouting method, eliminating the existing construction technology of drilling and grouting f

Method used

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Embodiment Construction

[0025] A deep muddy semi-cemented sand-pebble gravel layer was deposited in the ancient river channel on the left bank of a water conservancy project. Curtain grouting was designed for anti-seepage treatment, and the maximum curtain design depth was 180m. In the early stage of the grouting test, the grouting test was carried out by using the orifice closed grouting method and the casing valve grouting method. Since some formations are highly permeable formations, in-hole accidents such as drill sticking and casting pipes are prone to occur during drilling and grouting tests, which have a certain impact on the grouting tests.

[0026] Adopt the step of the inventive method as follows:

[0027] Step 1: Turn on the pipe drilling rig, use a drill pipe with a diameter of 89 mm and a casing wall with a diameter of 146 mm for drilling, and drill to the maximum depth that the pipe drilling machine can drill;

[0028] Step 2: Change to a pressure roller bit with a diameter of 115 mm a...

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Abstract

The invention discloses a rapid grouting method of a deep overburden layer. The method comprises the following steps: step one, drilling to a maximum depth that a drilling machine can reach; step two, continuously drilling to a final hole depth; step three, filling till a hole orifice; step four, alternately pulling a casing pipe and supplementing filler into the hole; step five, supplementarily injecting the filler; step six, cleaning the hole, embedding a hole orifice pipe and waiting setting; step seven, cleaning the hole till the section bottom of a next grouting section, not picking up the drill after punching the hole, and taking a drill rod as a grouting pipe and grouting via a hole orifice sealing method; step eight, repeating the step seven, sectionally cleaning the hole and grouting till a final hole and completing rapid grouting of the deep overburden layer. Through the rapid grouting method of the deep overburden layer, the technical problems of high drilling accident rate and low working efficiency caused by curtain grouting construction in the deep overburden layer can be solved; the grouting effect and the construction efficiency are effectively improved; the rapid-construction, economical and efficient purpose is achieved.

Description

technical field [0001] The invention relates to the field of drilling grouting, in particular to a grouting method used for anti-seepage treatment engineering of foundations with deep overburden layers. Background technique [0002] With the development of water conservancy and hydropower projects, the development of water conservancy and hydropower projects has gradually expanded to the western plateau and canyon basins, and the conditions for dam construction have become more and more complicated, especially in the key construction projects under the opportunity of the western development, with high mountains and deep valleys and deep covering layers , complex geological conditions. How to do a good job in anti-seepage treatment of dam foundation under the condition of deep overburden layer is one of the key technical problems to solve the development of water conservancy and hydropower in western my country. [0003] At present, the casing valve grouting method and the o...

Claims

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Application Information

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IPC IPC(8): E02D15/02E02D19/16
Inventor 童耀王小强邬美富马开珉郝永志丁跃顺童健翟兵科肖庆忠
Owner GEZHOUBA GROUP FOUND ENG
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