Construction method of double-liquid rapid-hardening high-pressure jet grouting pile

Abstract

The invention discloses a construction method of a double-liquid rapid-hardening high-pressure jet grouting pile. The construction method comprises the following steps of measuring a pile position, clearing, excavating and removing a fault, debugging a drilling machine, placing the drilling machine in place, drilling to a designed depth, mixing cement paste, preparing water glass, performing double-liquid high-pressure jet grouting, finishing jet grouting, moving the drilling machine to a next pile and the like. Compared with a traditional common jet grouting pile construction process, two nozzles below a multifunctional full-hydraulic drill pipe machine are used for spraying cement paste and water glass through a pump body, then the cement paste solution and water glass solution sprayed out of the nozzles at the bottom of the multifunctional full-hydraulic drill pipe machine are rotationally stirred and mixed at the bottom of a pile position, and therefore rapid hardening and pile forming of the cement paste are achieved; the problem that an ordinary jet grouting pile cannot be formed due to the fact that flowing water exists on the earth surface is solved; and by means of the construction method, rapid pile forming and effective pile forming are achieved through grout, the pile forming time is very short, the liquidity of the grout is weak, the using amount of cement paste is relatively small, the using amount of the grout is reduced, and blocking of underground pipelines is avoided.

Description

technical field [0001] The invention relates to the technical field of building engineering construction, in particular to a construction method of a double-liquid rapid-setting high-pressure jet grouting pile applied to emergency rescue, leak plugging, rapid reinforcement of underground engineering, and reinforcement of weak foundations with extremely unstable groundwater. Background technique [0002] The rotary jet grouting method was developed in the 1970s. It was developed on the basis of static pressure grouting and the introduction of hydraulic coal mining technology. Pour cement slurry to form a condensate, so as to achieve the purpose of strengthening the foundation. [0003] Ordinary rotary grouting piles use high-pressure rotating nozzles to spray cement slurry into the soil layer and mix with the soil to form a continuous lapped cement reinforcement, thereby strengthening to the surface. However, ordinary rotary grouting piles have some defects: [0004] (1) Due...

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Problems solved by technology

[0015] Aiming at the conventional rotary grouting piles existing in the prior art, it is difficult to form a pile under the condition of flowing water in the ground, the grout solidification time is long during the ordinary rotary grouting construction process, the fluidity of the slurry is strong, the slurry waste is serious, and the WSS grouting process is easy to lock the drill pipe , work efficiency is very low, the slurry is dispersed and difficult to form piles and other deficiencies, the technical problem to be solved by the present invention is to provide a method that uses water glass and cement slurry to be sprayed in a ratio of 2:1, and the slurry is mixed after spraying. Finally, it can solidify into a pile within 2 minutes, saving construction time, avoiding the waste of cement slurry, and saving raw materials. Moreover, the double-liquid quick-setting high-pressure rotary grouting pile adopts a multi-functional large drilling rig, and its power is large enough to effectively solve the problem of rapid setting of the slurry. Double-fluid rapid-setting high-pressure rotary grouting piles with difficult problems such as drilling

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