Modified sodium silicate grouting material

Abstract

The invention discloses a modified sodium silicate grouting material which comprises a liquid A and a liquid B which are uniformly mixed. The solution A is a phosphoric acid solution, the solution B is a sodium silicate solution and a surfactant, and the specific ratio is as shown in the specification; compared with acid-sodium silicate double-liquid slurry, the anionic surfactant is added, so that the wetting permeability of the sodium silicate solution is improved to a greater extent, and the surface tension of the sodium silicate solution is reduced. After the anionic surfactant is added, ahydrophobic alkyl chain of the anionic surfactant is adsorbed on the surface of sandy soil, and a hydrophilic group with a benzene ring tilts to a water phase, so that the surface tension of water and the liquid-solid interfacial tension of the sandy soil are reduced, the contact angle of water on the surface of the sandy soil is decreased, the surface property of the sandy soil is changed from hydrophobicity to hydrophilicity, and the sandy soil wetting performance of a solution is enhanced; therefore, the permeation range of the sodium silicate slurry in a soil layer during rock-soil grouting reinforcement can be enlarged, the grouting time is shortened, and the grouting pressure is reduced. The modified sodium silicate grouting material has wide development and application prospects indry silty-fine sand stratums.

Description

technical field [0001] The invention relates to a modified water glass grouting material, which belongs to the field of stratum reinforcement and water blocking and anti-seepage grouting materials. Background technique [0002] The grouting theory is developed based on fluid mechanics and solid mechanics. By analyzing the flow form of grout, the relationship between grouting pressure, grout flow rate, diffusion radius and grouting time is established. The grouting theory can be used to study the flow laws of different types of grout in rock and soil pores, reveal the relationship between formation characteristics, material properties and grouting process parameters, and provide scientific basis and theoretical guidance for grouting design and construction. For different engineering problems, the currently developed grouting theories mainly include permeable grouting, splitting grouting, compaction grouting, electro-chemical grouting, and low-permeability medium grouting theo...

AI Technical Summary

Problems solved by technology

However, the traditional acid-sodium silicate slurry still has some disadvantages, such as poor injectability in dry silty sand formations with loose and poor stability, resulting in unstable reinforcement effect and unsatisfactory anti-seepage effect

Taking the Beijing Underground Comprehensive Pipe Gallery Project as an example, the use of traditional acid water glass grouting materials is prone to sand leakage, sand gushing, and massive settlement, which will seriously affect the construction progress and cause economic losses

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