Rapid grouting method of deep overburden layer

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...

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 for deep overburden It can solve the technical problems of high accident rate and low work efficiency in the curtain grouting construction hole in the deep covering layer, effectively improve the grouting effect and construction work efficiency, and achieve the purpose of rapid construction and economical efficiency