High-molecular water-soluble polymer residue soil dispersing agent

Abstract

The invention discloses a high-molecular water-soluble polymer residue soil dispersing agent, which is composed of the following components in percentage by mass: 18%-24% of sodium polyacrylate, 4% ofpolyethylene glycol, 3% of fatty acid polyethylene glycol ester, 5-6% of fatty alcohol polyoxyethylene ether, 5-6% of N-methylpyrrolidone and 57-65% of water. The anionic dispersing agent composed ofsodium polyacrylate and an auxiliary agent thereof is designed according to the chemical principle of mud cake formation of residual soil, the electrostatic adsorption binding force of soil aggregation is decomposed, the viscosity of soil is reduced, the dispersion effect is achieved, the problem of 'mud cake formation' in a cutterhead of a shield tunneling machine is effectively prevented and solved, the use process is simple, the dispersing effect is good, the construction pressure of the shield tunneling machine is greatly relieved, and the construction efficiency and safety are improved.

Description

technical field [0001] The invention belongs to the technical field of dispersants, and in particular relates to a polymer water-soluble polymer slag dispersant. Background technique [0002] During the construction process of the earth pressure balance shield, the peeled off muck is easy to adhere to the cutter head panel and the soil bin, thereby accumulating and forming a solid mud cake, commonly known as "mud cake". Since the application of the shield tunneling method, problems such as construction safety and construction progress caused by the problem of "mud cake" on the cutterhead have always plagued shield tunneling technicians. When shield tunneling is carried out in sandy gravel and mudstone composite strata, the occurrence of mud cake on the cutter head is relatively frequent, which greatly affects the normal progress of construction and increases the risk of construction. [0003] At present, oxalic acid and dispersant solution soaking process are often used to ...

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Problems solved by technology

In the construction of shield tunneling in sandy pebble and mudstone composite stratum, the occurrence of mud cake on the cutter head is also relatively frequent, which greatly affects the normal progress of construction and increases the risk of construction

[0003] At present, oxalic acid and dispersant solution soaking process are often used to disperse after serious mud cake appears in the shield, but the use of oxalic acid has certain corrosion damage to the equipment, and the effects of other types of dispersant solutions are also quite different, especially Injection of dispersant solution during excavation to prevent mud cake is relatively rare and the effect is not obvious

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