Environment-friendly dry powder foaming agent for shield construction and preparation method thereof

An environmentally friendly, foaming agent technology, applied in chemical instruments and methods, mining equipment, earth-moving drilling, etc., can solve problems such as difficulty in meeting construction requirements, small adjustable half-life range, etc., to reduce friction and improve tunneling efficiency. , Improve the effect of cohesion and flow plasticity

Pending Publication Date: 2022-02-18
成都威华机电设备有限公司
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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 i

Method used

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  • Environment-friendly dry powder foaming agent for shield construction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to the mass ratio, weigh sodium lauryl sulfate and sodium lauryl alcohol polyoxyethylene ether sulfate and mix them in a ratio of 1:1; weigh polyethylene oxide and guar gum in a mass ratio of 2:1 Weighing, weigh lauryl alcohol and sodium carboxymethyl cellulose at the same time according to the ratio of 2:1, after they are mixed evenly, mix the foaming agent, thickener and foam stabilizer according to the mass ratio of 1:1 :1 ratio to obtain respectively; then add foaming agent to pure water and stir, after stirring evenly, add thickener and foam stabilizer in turn, the speed of stirring is controlled at 80r / min, then dry, pulverize and After sieving, a dry powdery substance was obtained.

Embodiment 2

[0031] According to the mass ratio, weigh sodium lauryl sulfate and sodium lauryl alcohol polyoxyethylene ether sulfate and mix them in a ratio of 2:1; weigh polyethylene oxide and guar gum according to a mass ratio of 2:1. Weighing, weigh lauryl alcohol and sodium carboxymethyl cellulose at the same time according to the ratio of 2:1, after they are mixed evenly, mix the foaming agent, thickener and foam stabilizer according to the mass ratio of 1:1 :1 ratio to obtain respectively; then add foaming agent to pure water and stir, after stirring evenly, add thickener and foam stabilizer in turn, the speed of stirring is controlled at 80r / min, then dry, pulverize and After sieving, a dry powdery substance was obtained.

Embodiment 3

[0033] According to the mass ratio, weigh sodium lauryl sulfate and sodium lauryl polyoxyethylene ether sulfate and mix them in a ratio of 1:3; weigh polyethylene oxide and guar gum in a mass ratio of 2:1 Weighing, weigh lauryl alcohol and sodium carboxymethyl cellulose at the same time according to the ratio of 2:1, after they are mixed evenly, mix the foaming agent, thickener and foam stabilizer according to the mass ratio of 1:1 :1 ratio to obtain respectively; then add foaming agent to pure water and stir, after stirring evenly, add thickener and foam stabilizer in turn, the speed of stirring is controlled at 80r / min, then dry, pulverize and After sieving, a dry powdery substance was obtained.

[0034] Dissolve the dry powders obtained in the above three examples in pure water, mix them according to the ratio of 3:7, use them after stirring evenly, add them to the corresponding foaming device for related tests, and the results are shown in the following table:

[0035] ...

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Abstract

The invention discloses an environment-friendly dry powder foaming agent for shield construction and a preparation method thereof. The environment-friendly dry powder foaming agent comprises a foaming agent, a thickening agent and a foam stabilizer, wherein the foaming agent is lauryl sodium sulfate and lauryl alcohol polyoxyethylene ether sodium sulfate, the thickening agent is prepared from polyoxyethylene and guar gum according to a ratio, and the foam stabilizer is dodecanol and sodium carboxymethyl cellulose. According to the invention, the dry powder is suitable for improvement of clay layer, sand layer and round gravel layer geological earth pressure balance shield construction muck; the stability under the shearing action is improved on the basis that an existing foaming agent has high foaming times and half-life period, so that the cohesiveness and flow plasticity of muck are remarkably improved, the pressure at a cutterhead soil bin is maintained to be constant, and the stability of an excavation surface is ensured so as to improve the shield excavation efficiency.

Description

technical field [0001] The invention relates to the field of shield construction materials, in particular to an environment-friendly dry powder foaming agent for shield construction and a preparation method thereof. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] At present, major cities in my country have vigorously developed 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. During the construction of the earth pressure balance shield, the in-situ soil cut from the face of the tunnel does not meet the...

Claims

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Application Information

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IPC IPC(8): C09K17/32E21D9/06C09K103/00
CPCC09K17/32E21D9/0685C09K2103/00
Inventor 米仕鹏施照国
Owner 成都威华机电设备有限公司
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