Controllable grouting material for advanced small pipe for water-rich accumulation body stratum tunnel and preparation method thereof

Abstract

The invention relates to a controllable grouting material for an advanced small pipe for a water-rich accumulation body stratum tunnel. The controllable grouting material is prepared from cement pasteand additives (polyethylene glycol, sodium hydroxide, silica sand and lignosulfonate). The preparation method comprises the following steps: uniformly mixing water and 42.5<#> ordinary Portland cement to prepare the cement paste; adding sodium hydroxide and silica sand into water, and carrying out uniform mixing and dissolving to obtain a solution A; adding a PEG-800 solid into water for dissolving to obtain a solution B; and adding the solution A, the solution B and lignosulfonate into the cement paste, and carrying out uniform mixing to obtain the controllable grouting material. According to the controllable grouting material disclosed by the invention, the problems of underwater dispersion resistance and controllability which are difficult to realize by a traditional grouting materialare solved, and the requirements of tunnel excavation for the performance such as the gelling time, the early strength and the bleeding rate of slurry are met; after grouting is finished, the water-rich accumulation body stratum reinforcing effect is good, no pollution is caused to the environment, the manufacturing cost is saved, and the construction progress requirement is met.

Description

technical field [0001] The invention belongs to the technical field of grouting for underground engineering treatment, and in particular relates to a grouting material for an advanced small conduit of a water-rich accumulation body formation tunnel and a preparation method thereof. Background technique [0002] With the continuous development of my country's transportation industry, more and more tunnels will inevitably be built in adverse geological environments. Among them, due to the wide distribution and complex geological conditions, the loose accumulation strata are often encountered in the tunnel construction process, especially for the water-rich loose accumulation strata, engineering accidents are very likely to occur during the construction process. In view of the above problems, the pre-grouting technology of small conduits is generally used in engineering to solve this problem, and the grouting material is the key factor to ensure the pre-grouting effect of small...

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Problems solved by technology

[0003] At present, the commonly used materials for pre-grouting of small conduits in engineering include pure cement slurry, cement-based quick-setting slurry, and other chemical slurry; among them, pure cement slurry has slow setting time, poor slurry stability, and uncontrollable grouting diffusion range. and other shortcomings, and it is easy to disperse in a water-rich environment, and the grouting effect is poor; the cement-based quick-setting grout does not have the above problems, but the grout is difficult to control during the grouting process, and there are often phenomena such as pipe plugging and insufficient diffusion range; and chemical grout It solves many problems of the above-mentioned grout materials, but the grout materials are expensive and pollute the environment to a certain extent, so it is difficult to popularize and apply

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