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Dispersant for improving clay and preparation method thereof

A technology of dispersant and dispersant aid, which is applied in the field of improved clay dispersant and its preparation, which can solve the problems of shield machine damage, tool wear, and tool head torque drop, etc., to improve flow plasticity and dispersibility, and reduce viscosity Effect

Inactive Publication Date: 2019-08-23
CHINA RAILWAY FIFTH SURVEY & DESIGN INST GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the process of shield tunneling construction, it is often encountered with silty clay, clayey clay and other clay or highly viscous soil layers. The mud cake is formed by rolling, which often causes the problem of "mud cake" on the shield machine, which may cause a sharp drop in the torque of the cutter head and wear of the tool, or cause difficulty in tunneling and serious damage to the shield machine, which will affect the construction of the shield machine. Work properly

Method used

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  • Dispersant for improving clay and preparation method thereof

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Embodiment 1

[0029] The embodiment of the present application provides a dispersant for improving clay, the dispersant is composed of organic dispersant, inorganic dispersant, dispersion aid, surfactant and water, wherein, in weight percentage, the organic dispersant The weight percentage content is 1% to 3%, the weight percentage content of the inorganic dispersant is 4% to 10%, the weight percentage content of the dispersing aid is 2% to 6%, and the weight percentage content of the surfactant is 1% to 5%. %, the weight percentage content of water is 76%~92%.

[0030] Among the above dispersants, the organic dispersant can be at least one of polyacrylamide, hydroxypropyl cellulose, carboxymethyl cellulose and triethylhexyl phosphoric acid, such as: the organic dispersant can be polyacrylamide, hydroxypropyl cellulose Any one of propyl cellulose, carboxymethyl cellulose and triethylhexyl phosphate, organic dispersant can also use polyacrylamide, hydroxypropyl cellulose, carboxymethyl cellu...

Embodiment 2

[0046] The embodiment of the present application provides a dispersant for improving clay, the dispersant includes organic dispersant, inorganic dispersant, dispersion aid, surfactant and water, wherein, in weight percentage, the weight of organic dispersant The percentage content is 2%, the weight percentage content of the inorganic dispersant is 7%, the weight percentage content of the dispersing aid is 4%, the weight percentage content of the surfactant is 3%, and the weight percentage content of the water is 84%.

[0047] Among the above-mentioned dispersants, the organic dispersant can use any combination of polyacrylamide, hydroxypropyl cellulose, carboxymethyl cellulose and triethylhexyl phosphoric acid; the inorganic dispersant can use sodium hexametaphosphate, water glass, coke Any combination of sodium phosphate and sodium tripolyphosphate; any combination of polyethylene glycol, propylene glycol, glycerin and HPMA can be used as a dispersing aid; the surfactant can b...

Embodiment 3

[0052] The embodiment of the present application provides a dispersant for improving clay, the dispersant includes organic dispersant, inorganic dispersant, dispersion aid, surfactant and water, wherein, in weight percentage, the weight of organic dispersant The percentage content is 1%, the weight percentage content of the inorganic dispersant is 8%, the weight percentage content of the dispersing aid is 3%, the weight percentage content of the surfactant is 2%, and the weight percentage content of the water is 86%.

[0053] Among the above-mentioned dispersants, the organic dispersant can use any combination of polyacrylamide, hydroxypropyl cellulose, carboxymethyl cellulose and triethylhexyl phosphoric acid; the inorganic dispersant can use sodium hexametaphosphate, water glass, coke Any combination of sodium phosphate and sodium tripolyphosphate; any combination of polyethylene glycol, propylene glycol, glycerin and HPMA can be used as a dispersing aid; the surfactant can b...

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Abstract

The embodiment of that present application relates to the technical field of underground engineering construction material, in particular to a dispersant for improving clay and a preparation method thereof. The dispersant is composed of organic dispersant, inorganic dispersant, dispersing assistant, surfactant and water, in which, by weight percent, wherein the weight percent content of the organic dispersant is 1 to 3 percent, the weight percent content of the inorganic dispersant is 4 to 10 percent, the weight percent content of the dispersion assistant is 2 to 6 percent, the weight percentcontent of the surfactant is 1 to 5 percent, and the weight percent content of the water is 76 to 92 percent. The dispersant can reduce the viscosity of clay, improve the flow plasticity and dispersion of clay, thus ensuring the shield tunneling in clay ground to avoid mud cake phenomenon, which is conducive to ensure the smooth progress of shield tunneling.

Description

technical field [0001] The present application relates to the technical field of underground engineering construction materials, in particular to a dispersant for improving clay and a preparation method thereof. Background technique [0002] In the process of shield tunneling construction, it is often encountered with silty clay, clayey clay and other clay or highly viscous soil layers. The mud cake is formed by rolling, which often causes the problem of "mud cake" on the shield machine, which may cause a sharp drop in the torque of the cutter head and wear of the tool, or cause difficulty in tunneling and serious damage to the shield machine, which will affect the construction of the shield machine. Work properly. In view of this, during the excavation construction process, it is necessary to improve the clay with muck to reduce its viscosity and improve its flow plasticity, so as to meet the requirements of normal excavation of earth pressure balance shield. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/40C09K103/00
CPCC09K17/40C09K2103/00
Inventor 王德乾谢宇飞邢鹏飞孙世豪严振林魏松磊王浩耿冬梅周衍领胡莲
Owner CHINA RAILWAY FIFTH SURVEY & DESIGN INST GRP
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