Slurry for hole drilling and wall protection as well as preparation technology and on-site construction technology thereof

Abstract

The invention discloses slurry for hole drilling and wall protection. The slurry is prepared from the following components: water, bentonite and an admixture according to the mass ratio of (8 to 14) to (0.8 to 1.2) to 0.01, wherein the admixture is prepared by mixing water, sodium bentonite, polyaluminum chloride and sodium carbonate according to the ratio of (600 to 800ml) to (60 to 80g) to (1.4to 1.65g) to 1.54g. The slurry disclosed by the invention has a good wall protection effect; the slurry is uniform and the viscosity ratios of upper and lower layers are the same; the inner part of asand layer is drilled in a rotary manner and hole collapse is not caused; and the slurry has suitable viscosity and does not cause a drill pasting phenomenon.

Description

technical field [0001] The invention relates to the field of wall protection mud. More specifically, the present invention relates to a mud for drilling and wall protection, its preparation process and on-site construction process. Background technique [0002] At present, in the bridge foundation engineering, the bored pile foundation has already occupied an important position. With the development of bored piles to large diameter and high depth, the performance of the mud retaining wall material has an increasing influence on the quality of the borehole. Currently on the market The wall protection mud generally has the problems of poor uniformity and poor hole-forming effect. Contents of the invention [0003] The invention provides a kind of mud for drilling and protecting walls. The mud is uniform, the viscosity ratio of the upper and lower layers is consistent, and the higher the durability, the better the hole-forming effect. [0004] In order to achieve the above ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the bridge foundation engineering, the bored pile foundation has already occupied an important position. With the development of bored piles to large diameter and high depth, the performance of the mud retaining wall material has an increasing influence on the quality of the borehole. Currently on the market The wall protection mud generally has the problems of poor uniformity and poor hole-forming effect

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