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Foaming agent for earth pressure balance shield and preparation method thereof

A technology of earth pressure balance shield tunneling and foaming agents, which is applied to chemical instruments and methods, building structures, soil conditioning materials, etc., can solve the problems of high transportation costs or production costs, poor adaptability, and increased shield construction costs. Achieve excellent foaming stability, excellent foaming ability, and cost-effective effects

Inactive Publication Date: 2017-08-11
CHINA BUILDING MATERIALS ACAD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, most of the foam agents used in domestic subway shield construction are imported from abroad or domestically produced with foreign formulas, and their transportation costs or production costs are high, which increases the cost of shield construction and is difficult to use in large quantities in shield construction; while domestic The self-developed foam agent technology is still immature, and the foaming ability, foam uniformity and stability of domestic foam agents still have a certain distance compared with imported products, and the adaptability is poor

Method used

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  • Foaming agent for earth pressure balance shield and preparation method thereof

Examples

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Embodiment

[0015] Examples 1-3 of this application prepared the EPB shield foaming agent according to the following preparation method: Weigh each component according to the content in Table 1, and then add fatty alcohol polyoxyethylene ether sodium sulfate, sodium lauryl sulfate, Sodium α-alkenyl sulfonate, cocamidopropyl betaine and coco glucoside are added to 0.5L of warm water at 40℃-70℃, and the mixture is stirred to make a transparent water-soluble liquid, which is soil The finished product of pressure balance shield foaming agent.

[0016] Examples 4-14 of this application prepared the EPB shield foaming agent according to the following preparation method: Weigh each component according to the content in Table 1, and first add the thickener to 0.5L of warm water at 40°C-70°C, Stir until fully dissolved, and then add fatty alcohol polyoxyethylene ether sodium sulfate, sodium lauryl sulfate, sodium α-alkenyl sulfonate, cocamidopropyl betaine and coco glucose according to the amount in ...

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Abstract

The invention discloses a foaming agent for an earth pressure balance shield and a preparation method thereof. The foaming agent for the earth pressure balance shield comprises, by weight, 10 to 20 parts of sodium fatty alcohol polyoxyethylene ether sulfate, 10 to 30 parts of sodium dodecyl sulfate, 10 to 20 parts of sodium alpha-olefin sulfonate, 1 to 10 parts of cocamidopropyl betaine, 1 to 10 parts of coco-glucoside and 0 to 2 parts of a thickening agent. The foaming agent for the earth pressure balance shield has excellent foaming performance and low production cost and can greatly reduce cost for construction via the earth pressure balance shield.

Description

Technical field [0001] The invention relates to the technical field of earth pressure balance shields, in particular to an earth pressure balance shield foaming agent and a preparation method thereof. Background technique [0002] Major cities in my country have been vigorously developing underground tunnel traffic in recent years. The earth pressure balance shield construction method has become the most widely used urban tunnel construction method because of its small impact on the surrounding environment. The earth pressure balance shield construction method uses an earth pressure balance shield machine. The earth pressure balance shield machine uses a full-face cutting cutter head installed at the front of the shield to cut the front soil into the storage behind the cutter head. Stay in the airtight cabin and balance the pressure in the cabin with the water and soil pressure of the excavation surface to reduce the disturbance of the ground soil caused by the advancement of the...

Claims

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Application Information

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IPC IPC(8): C09K17/18C09K103/00
CPCC09K17/18C09K2103/00
Inventor 白杰蔡阳王博
Owner CHINA BUILDING MATERIALS ACAD
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