Foaming agent for improving shield muck in coastal silt soil layer, and preparation and use methods thereof

A muck improvement and foaming agent technology, which is applied in the fields of shield muck foaming agent and coastal silt soil layer, can solve the problems of high viscosity and lack of flow plasticity of silt soil, achieve high air-liquid surface strength, and avoid leakage Difficult slag and reduced manufacturing cost

Pending Publication Date: 2022-04-22
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to provide a cost-effective, environmentally friendly, stable and reliable new foaming agent suitable for coastal muddy soil layers to solve the problems caused by the high viscosity of muddy soil and lack of flow plasticity when shield tunneling is carried out in coastal muddy soil layers. potential risk of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] A method for preparing a foaming agent for improvement of shield tunneling muck in coastal silt layer, the steps are:

[0028] (a) Use the liquid material alkyl sucrose as the main foaming agent, and the solid material fatty alcohol polyoxyethylene ether sodium sulfate as the secondary foaming agent, and prepare the foaming agent base liquid according to the ratio of parts by volume of 2.5:1.

[0029] (b) Firstly, the liquid evergreen dispersant is used as an additive, and added to water according to the volume ratio of the additive to water at 2-10:100.

[0030] (c) Add the powdered hollyhock gum and linseed gum as additives, and add them to the water in step (b) according to the ratio of the weight and number of additives to water at 0.01 to 0.12:100. The mass-to-number ratio is 1:1.

[0031] (d) Finally, according to the volume fraction of the foam agent base liquid and water is 4-12:100, slowly add the water in step (c) to the foam agent base liquid, stir for more ...

Embodiment 1

[0036] Example 1 Foaming agent for shield tunneling slag improvement in coastal silt layer, including foaming agent base liquid, liquid material evergreen dispersant, powder materials hollyhock gum and linseed gum respectively as additives, and water. The volume fraction ratio of foam base liquid and water is 4:100, the volume fraction ratio of liquid material additive and water is 2:100, the volume fraction ratio of powder material additive and water is 0.05:100, the powder material hollyhock gum and The mass-to-volume ratio of linseed gum is 1:1. The foam agent base liquid includes the liquid material alkyl sucrose as the main foam agent, the solid fatty alcohol polyoxyethylene ether sodium sulfate as the secondary foam agent, and the ratio of volume and fraction of alkyl sucrose and fatty alcohol polyoxyethylene ether sodium sulfate It is 2.5:1.

Embodiment 2

[0037] Example 2 Foaming agent for shield tunneling slag improvement in coastal silt layer, including foaming agent base liquid, liquid evergreen dispersant, powdered hollyhock gum and linseed gum as additives respectively, and water. The volume fraction ratio of foam base liquid and water is 4:100, the volume fraction ratio of liquid material additive and water is 3:100, the volume fraction ratio of powder material additive and water is 0.05:100, the powder material hollyhock gum and The mass-to-volume ratio of linseed gum is 1:1. The foam agent base liquid includes the liquid material alkyl sucrose as the main foam agent, the solid fatty alcohol polyoxyethylene ether sodium sulfate as the secondary foam agent, and the ratio of volume and fraction of alkyl sucrose and fatty alcohol polyoxyethylene ether sodium sulfate It is 2.5:1.

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Abstract

The invention discloses a foaming agent for improving shield muck in a coastal silt soil layer. The foaming agent is prepared from a foaming agent base solution, a Changqing dispersing agent, powder abelmoschus manihot gum, flaxseed gum and water, the volume part ratio of the foaming agent base solution to the water is (4-12): 100, the volume part ratio of the liquid additive to the water is (2-10): 100, the volume part ratio of the powder additive to the water is (0.01-0.12): 100, and the mass part ratio of the powder abelmoschus manihot gum to the flaxseed gum is 1: 1; the foaming agent base solution comprises a liquid material alkyl sucrose glycoside and a solid material fatty alcohol polyoxyethylene ether sodium sulfate, and the volume part ratio is 2.5: 1. The invention also discloses a preparation method and a use method of the composition. The foaming ratio of the foaming agent is higher than 25 times, the half-life period is longer than 1500s, the half-life period within 5min is zero, the foam stability is high, the gas-liquid level strength is high, the foam density is high, the foaming agent can enter soil body gaps to improve the flow plasticity of the soil body, and the adhesion of the sludge cohesive soil is reduced.

Description

technical field [0001] The invention relates to the technical field of engineering construction materials, in particular to a shield dreg foaming agent, a preparation method and a use method, and is especially suitable for coastal silt soil layers. Background technique [0002] There are deep and thick silt soil layers in the coastal area. The strata are complex and harsh. The clay content is high, the soil layer has great adhesion, and lacks flow plasticity. It is difficult to solve the problem of dispersion of soil clods with simple foam agents, and shield tunneling is very easy. It causes problems such as "mud cake" and difficulty in slag discharge, thus affecting the excavation efficiency. At the same time, with the rapid development of urban underground engineering construction in my country, there are more and more examples of shield excavation in coastal silt soil layers, and the consumption of foam for muck soil improvement is huge. It is imminent to develop new foam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/32E21D9/06C09K103/00
CPCC09K17/32E21D9/0685C09K2103/00
Inventor 黄明黄培文丁琨
Owner FUZHOU UNIV
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