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Foaming agent for earth pressure balance shield machine

An earth pressure balance and shield machine technology, which is applied in the field of special foaming agent for earth pressure balance shield machine construction, can solve the problems of eccentric wear or extreme wear of the cutter ring, reduced cutter head torque, and reduced propulsion speed, etc. Achieve the effect of slowing tool wear, reducing cutter head torque, and improving flow plastic performance

Inactive Publication Date: 2013-06-05
GUANGZHOU CHAIVO ABRASIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the air bubble improvement technology of additives currently used is suitable for plastic and hard plastic clay strata, clay sandy soil strata, mudstone, argillaceous siltstone, residual soil strata whose parent rock is granite, fully weathered rock stratum and strongly weathered rock stratum, etc. It is easy to form mud cake when excavating in the formation. When the phenomenon of mud cake is formed, the torque of the cutterhead during excavation will be reduced, the thrust will be greatly increased, the advancing speed will be reduced, and there will be little or no material output. The appearance of mud cake will cause excavation. Difficulty, the temperature of the cutter head rises sharply, the cutter body is heated and expanded, causing partial wear or extreme wear of the cutter ring, if it is not treated for a long time, it is easy to cause ground collapse and serious damage to the shield machine

Method used

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  • Foaming agent for earth pressure balance shield machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] In this embodiment, the special foaming agent for the earth pressure balance shield machine is calculated by weight percentage and consists of the following ingredients: 6% fatty alcohol polyoxyethylene ether sodium sulfate that plays a foaming role,

[0060] Fatty acid diethanolamide 3% with thickening, foaming and foam stabilizing effects,

[0061] Lauramide propylamine oxide 3% for foaming and foam stabilization,

[0062] Fatty alcohol sodium sulfate 4% for foaming, emulsifying and dispersing,

[0063] Methylchloroisothiazolinone 0.2% as a preservative,

[0064] Disodium edetate 0.1%, which acts as a water quality stabilizer,

[0065] The above components are indispensable, and the rest is 83.7% of deionized water.

[0066] At room temperature, mix and stir the components evenly to make a foaming agent. The physical and chemical indicators of the foaming agent are

[0067] project

Physical and chemical indicators

Exterior

colorless trans...

Embodiment 2

[0071] In this embodiment, the special foaming agent for the earth pressure balance shield machine is calculated by weight percentage and consists of the following ingredients: 12% fatty alcohol polyoxyethylene ether sodium sulfate that plays a foaming role,

[0072] Fatty acid diethanolamide 3% with thickening, foaming and foam stabilizing effects,

[0073] Lauramide propylamine oxide 3% for foaming and foam stabilization,

[0074] Fatty alcohol sodium sulfate 4% for foaming, emulsifying and dispersing,

[0075]Methylchloroisothiazolinone 0.2% as a preservative,

[0076] Disodium edetate 0.1%, which acts as a water quality stabilizer,

[0077] Deionized water 77.7%.

[0078] The physicochemical index of the whipping agent after mixing is identical with embodiment one.

Embodiment 3

[0080] In this embodiment, the special foaming agent for the earth pressure balance shield machine is calculated by weight percentage and consists of the following ingredients: 9% fatty alcohol polyoxyethylene ether sodium sulfate that plays a foaming role,

[0081] Fatty acid diethanolamide 3% with thickening, foaming and foam stabilizing effects,

[0082] Lauramide propylamine oxide 4% for foaming and foam stabilization,

[0083] Sodium fatty alcohol sulfate 5% for foaming, emulsifying and dispersing,

[0084] Methylchloroisothiazolinone 0.3% as a preservative,

[0085] Disodium edetate 0.2% which acts as a water quality stabilizer,

[0086] Deionized water 78.5%.

[0087] The physicochemical index of the whipping agent after mixing is identical with embodiment one.

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Abstract

The invention discloses a foaming agent for an earth pressure balance shield machine. The foaming agent for the earth pressure balance shield machine comprises the following ingredients: by weight, 6-12% of sodium fatty alcohol ether sulfate, 3-6% of fatty acid diethanolamide, 3-6% of lauramidopropylamine oxide, 4-5% of sodium aliphatic alcohol sulfate, 0.2-0.3% of methyl chloride isothiazolinone, 0.1-0.2% of disodium ethylenediamintetraacetate, and the balance deionized water. All the ingredients are evenly mixed into colorless transparent water-solubility solution under ordinary temperature, density of the solution under the temperature of 25 DEG C is 1.05 + / - 0.05 grams per cubic meter, and potential of hydrogen value is 7+-0.5. The foaming agent for the earth pressure balance shield is fine, rich and stable in foam, long in foam half-life period and high in permeability, capable of obviously reducing torque of a tool plate due to excellent lubricating performance of the agent, environment-friendly, and capable of meeting the requirement of improving muck during a digging process of the earth balance shield machine.

Description

technical field [0001] The invention relates to a special foaming agent for earth pressure balance shield machine construction. 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. Both apply compressed air in the tunnel or lower the groundwater level along the tunnel, and even use auxiliary technical measures such as chemical grouting. The above measures are not conducive to the control of construction safety, land subsidence and environmental protection, thus limiting the application and development of shield tunneling, thus promoting the development and application of closed balance principle shield tunneling technology. In the closed balance principle shield technology, the earth pressure balance shield technology is widely used because the applicable geological conditions range from soft cohesive soil...

Claims

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Application Information

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IPC IPC(8): C04B24/16
Inventor 彭劲松饶四海
Owner GUANGZHOU CHAIVO ABRASIVES
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