Stable foaming agent for shield construction of complex stratum and preparation method and application of stable foaming agent

A technology for stabilizing foaming agents and complex formations, which is applied in the directions of application, chemical instruments and methods, fertilization devices, etc., can solve the problem that the foaming multiple of the foaming agent and the adjustable range of the foaming multiple cannot meet the requirements, and it is difficult to meet the complex formation shield. The problems of construction and the small adjustable range of half-life period can improve the effect of soil improvement, good resistance to hard water and good biodegradation performance.

Inactive Publication Date: 2017-07-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The foaming rate and half-life of the foaming agent in the prior art can be adjusted in a small range, and it is difficult for the same foaming agent to meet the requirements of various formation shield constructions
[0006] In addition, during shield tunneling construction, shield machines often encounter hard water environments, and the foaming performance of existing foam agents in hard water environments is greatly reduced, making it even more difficult to meet construction requirements
[0007] In summary, in the prior art, the foaming ratio and the adjustable range of the foaming ratio cannot meet the requirements, the foam half-life is short and its adjustable range is small, and the foaming performance of the foaming agent in a hard water environment Greatly reduce the problem that it is difficult to meet the requirements of shield tunneling construction in complex strata, and there is still no effective solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Prepare 1000g of environment-friendly, efficient and stable foaming agent for shield tunneling in complicated strata, and the weights of each component are respectively:

[0043] Sodium α-alkenyl sulfonate: 70g

[0044] α-sulfo fatty acid methyl ester: 56g

[0045] Alkyl polyglycosides: 14g

[0046] Cocamidopropyl Betaine: 1g

[0047] Polyethylene oxide: 1g

[0048] Modified silicone polyether emulsion: 1g

[0049] Water: 857g.

[0050] At room temperature, first add sodium α-alkenyl sulfonate to 354g of water and stir. During the stirring process, sequentially add α-sulfo fatty acid methyl ester, alkyl polyglycoside, cocamidopropyl betaine, polyoxygen Ethylene and modified silicone resin polyether emulsion, after stirring evenly, add the remaining water, and stir well to get it.

[0051] The expansion ratio of the prepared foam agent can reach 29-35 times due to the difference in external temperature and water hardness, and the half-life of the foam is 11-16 minu...

Embodiment 2

[0053] Prepare 1000g of environment-friendly, efficient and stable foaming agent for shield tunneling in complicated strata, and the weights of each component are respectively:

[0054] Sodium α-alkenyl sulfonate: 40g

[0055] α-sulfo fatty acid methyl ester: 60g

[0056] Alkyl polyglycosides: 10g

[0057] Cocamidopropyl Betaine: 2g

[0058] Polyethylene oxide: 1g

[0059] Modified silicone resin polyether emulsion: 2g

[0060] Water: 885g.

[0061] At room temperature, first add sodium α-alkenyl sulfonate into the water and stir. During the stirring process, add α-sulfo fatty acid methyl ester, alkyl polyglycoside, cocamidopropyl betaine, polyethylene oxide And modified silicone resin polyether emulsion, after stirring evenly.

[0062] The expansion rate of the prepared foam agent is different due to the difference in external temperature and water hardness, the expansion ratio can reach 18-22 times, and the foam half-life is 18-25 minutes.

Embodiment 3

[0064] Prepare 1000g of environment-friendly, efficient and stable foaming agent for shield tunneling in complicated strata, and the weights of each component are respectively:

[0065] Sodium α-alkenyl sulfonate: 65g

[0066] α-sulfo fatty acid methyl ester: 30g

[0067] Alkyl polyglycosides: 5g

[0068] Cocamidopropyl Betaine: 1g

[0069] Polyethylene oxide: 4g

[0070] Modified silicone polyether emulsion: 5g

[0071] Water: 890g.

[0072] At room temperature, first add sodium α-alkenyl sulfonate into the water and stir. During the stirring process, add α-sulfo fatty acid methyl ester, alkyl polyglycoside, cocamidopropyl betaine, polyethylene oxide And modified silicone resin polyether emulsion, after stirring evenly.

[0073] The expansion rate of the prepared foam agent is different from the external temperature and water hardness, the expansion ratio can reach 27-35 times, and the foam half-life is 20-30 minutes.

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PUM

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Abstract

The invention discloses a stable foaming agent for shield construction of a complex stratum and a preparation method and an application of the stable foaming agent, and solves the problems that the foaming agent for an earth pressure balance shield is low in foaming capacity, poor in foaming stability performance and poor in hard water resistance, and is not green or environmentally friendly in the prior art. The stable foaming agent has the advantages of high foaming expansion, long half foam life period and good biodegradability, and comprises the following components of 8-14% of foaming agent, 0.2-0.5% of thickener, 0.1-0.5% of foam stabilizer and the balance of water, wherein % refers to mass percent, and the foaming agent comprises alpha-olefin sulfonate, alpha-sulfonated fatty acid methyl ester and alkyl polyglucosides.

Description

technical field [0001] The invention belongs to the field of earth pressure balance shield construction materials, and in particular relates to a stable foam agent for shield construction in complex formations, a preparation method and application thereof. Background technique [0002] At present, during the construction of the earth pressure balance shield, it is necessary to inject special air bubbles into the excavation surface or the soil chamber, and adjust the soil cut from the excavation surface into a "plastic flow state" in the pressure chamber to avoid gushing and occlusion , cake formation, and instability of the construction excavation surface to ensure the safety and stability of the shield tunneling process. [0003] However, strata are composed of various rock-forming minerals in different aggregate forms. The composition, properties and structure of minerals determine the physical and mechanical properties of various types of rock strata, such as the strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/38C09K103/00
CPCC09K17/38C09K2103/00
Inventor 李树忱赵世森陈健晏勤张哲朱林
Owner SHANDONG UNIV
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