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Earth pressure balance shield foaming agent

A technology of earth pressure balance shield and foam agent, which is applied in the direction of building construction, soil conditioning materials, organic fertilizers, etc., and can solve the problems of foam uniformity, stability, lubricity and permeability. Limited performance and other issues, to achieve the effect of improving workability and fluidity, protecting knives, and excellent permeability

Active Publication Date: 2015-09-30
XIAMEN NORNS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention solves the problem that current domestic foam agents have limited properties such as foam uniformity, stability, lubricity, permeability, adsorption force to target objects, and foaming force, and cannot fully meet the foam requirements of various shield construction environments. To provide a highly efficient special foaming agent for earth pressure balance shield construction

Method used

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  • Earth pressure balance shield foaming agent
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  • Earth pressure balance shield foaming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In this embodiment, the special foaming agent for earth pressure balance shield machine is composed of the following ingredients according to the percentage calculation: sodium lauryl sulfate 6%, cetyl trimethyl ammonium chloride 8%, cocamidopropyl 6% betaine, 3% lauryl dimethyl ammonium oxide, 0.2% disodium edetate, 1.0% ammonium chloride, and the balance is 75.8% water.

Embodiment 1

[0053] The foam rate of the product obtained in Example 1 was 30 times, and the foam stabilization time was 35 minutes.

Embodiment 2

[0055] In this embodiment, the special foaming agent for earth pressure balance shield machine is composed of the following ingredients according to the percentage calculation: sodium lauryl sulfate 9%, cetyl trimethyl ammonium chloride 6%, cocamidopropyl 5% betaine, 3% lauryl dimethyl ammonium oxide, 0.1% disodium edetate, 1.5% ammonium sulfate, 74.6% water.

[0056] When using the foaming agent in the present invention, since the foaming agent needs to be diluted with water when used, the recommended dosage for different formations is the following table, by weight percentage, so that better results can be obtained.

[0057]

[0058] The use effect of foaming agent provided by the embodiment of the present invention 1 and 2 is as follows:

[0059]

[0060] From the above data, it can be seen that the foaming agent in the present invention exhibits excellent lubricating performance in shield tunneling construction, significantly reduces the torque of the cutter head, ...

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Abstract

The invention relates to an earth pressure balance shield foaming agent and a preparation technology thereof. The earth pressure balance shield foaming agent is prepared from 4-15% by weight of sodium dodecyl sulfate, 1-10% by weight of cetyltrimethylammonium chloride, 2-8% by weight of cocamidopropyl betaine, 1-5% by weight of dodecyldimethylamine oxide, 0.1-0.5% by weight of disodium ethylene diamine tetraacetate, 0.1-2.0% by weight of a tackifier and the balance water. The earth pressure balance shield foaming agent has a simple formula and high effects, and utilizes cetyltrimethylammonium chloride with excellent permeability, flexibility, emulsification effects and sterilization performances as a cationic surfactant which can be mixed with other surfactants. The earth pressure balance shield foaming agent is environmentally friendly, has excellent permeability and lubricity and can effectively improve excavated soil fluidity and watertightness.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a formula of a special foam agent for earth pressure balance shield tunneling and a preparation process thereof. Background technique [0002] With the development of urban underground space, the shield construction method used for underground space construction is an effective construction method for modern urban tunnel construction. Among them, the earth pressure balance shield technology has been widely used due to the continuous expansion of the applicable geological conditions from soft clay soil to sand and gravel soil, and has become the first choice for tunnel construction due to its technical and economic advantages. mainstream. [0003] With the further expansion of underground engineering, the properties of the soil layers in different areas are different, that is, the geological conditions are different, and the key to the success of the earth pressure balan...

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 郭亚莹吴矾
Owner XIAMEN NORNS TECH
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