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Soil modifier for earth pressure balance shield

An earth pressure balance shield and improver technology, applied in application, building structure, soil conditioning materials, etc., can solve the problems of low foaming ratio, different adaptability of different strata, poor foam stability, etc., and achieve high foaming expansion. The effect of magnification, good foam stability, and simple preparation process

Inactive Publication Date: 2016-02-03
SHANGHAI SUNRISE POLYMER MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the foam improvement technology still has problems such as poor foam stability, low foaming ratio, and differences in adaptability to different formations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The weight percent of each raw material component is:

[0024] Sodium Lauryl Sulfate 10.0%

[0025] Sodium dodecylbenzenesulfonate 1.0%

[0026] Sodium α-alkenyl sulfonate 5.0%

[0027] Fatty alcohol polyoxyethylene ether 0.5%

[0028] Silicone polyether emulsion 0.3%

[0029] Water 83.2%

[0030] At room temperature, mix the components in proportion and stir evenly at a slow speed, adjust the pH to about 6, and obtain the soil conditioner of Example 1 of the present invention.

Embodiment 2

[0032] The weight percent of each raw material component is:

[0033] Sodium Lauryl Sulfate 12.0%

[0034] Sodium dodecylbenzenesulfonate 3.0%

[0035] Sodium α-alkenyl sulfonate 0.5%

[0036] Fatty alcohol polyoxyethylene ether 0.5%

[0037] Silicone polyether emulsion 0.3%

[0038] Carboxymethyl cellulose 0.2%

[0039] Water 83.5%

[0040] At room temperature, mix the components in proportion and stir evenly at a slow speed, and adjust the pH to about 6 to obtain the soil conditioner of Example 2 of the present invention.

Embodiment 3

[0042] Sodium Lauryl Sulfate 5.0%

[0043] Sodium dodecylbenzenesulfonate 0.3%

[0044] Sodium α-alkenyl sulfonate 15.0%

[0045] Fatty alcohol polyoxyethylene ether 0.5%

[0046] Coconut oil fatty acid diethanolamide 0.7%

[0047] Carboxymethyl cellulose 0.2%

[0048] Water 78.3%

[0049] At room temperature, mix the components in proportion and stir evenly at a slow speed, adjust the pH to about 6, and obtain the soil conditioner of Example 3 of the present invention.

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PUM

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Abstract

The invention relates to a soil modifier for earth pressure balance shield. The soil modifier is a foaming agent mixed from a foaming agent, a foam stabilizing agent and water. The foaming agent comprises of sodium alkyl sulfate, alkylbenzene sulfonate, alpha-alkenyl sodium sulfonate and fatty alcohol-polyoxyethylene ether. Each group is in the following weight percentage: 1-13% of sodium alkyl sulfate, 0.3-18% of alkylbenzene sulfonate, 0.5-15% of alpha-alkenyl sodium sulfonate, 0.5-3% of fatty alcohol-polyoxyethylene ether, 0.1-2% of foam stabilizing agent and the balance of water. The soil modifier can be used for earth pressure balance shield construction, has good stabilizing effect on excavation faces of different geological structures. Compared with other foaming agents, the soil modifier has higher foaming expansion rate and better stability, and can better improve the plastic flow property and permeability of soil body.

Description

technical field [0001] The invention relates to a shield construction material, which is mainly used for soil improvement in earth pressure balance shield construction. Background technique [0002] Our country is in an important period of rapid development of underground engineering construction such as urban subways. Especially in recent years, almost all of the construction of subway tunnels in Beijing, Shanghai, Guangzhou and Nanjing have adopted the shield tunneling method, and except for a few special tenders. In addition to mud-water shields, most other shield types use composite earth pressure balance shields. The earth pressure balance shield method is not only relatively cheap, but also can inject additional materials into the pressure chamber to adjust the soil properties in the pressure chamber, so as to be suitable for various geological conditions, so it has been widely used in various projects in our country. The application has become the mainstream of shield...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/18C09K17/32C09K103/00
Inventor 王伟山田萌冯中军傅乐峰
Owner SHANGHAI SUNRISE POLYMER MATERIAL CO LTD
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