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Efficient plugging film-forming shield slurry material for rescue and emergency

A technology of film formation and shield tunneling, applied in the direction of landfill technology, etc., can solve problems such as plugging failure, engineering quality and safety accidents, complex and changeable stratum conditions, etc., and achieve the effect of strengthening and ensuring stability

Active Publication Date: 2020-12-22
CCCC WUHAN HARBOR ENG DESIGN & RES +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid phase substances in conventional mud are all rigid particles with a fixed particle size. Therefore, the particle size and gradation of the solid phase substances must match the pore size of the formation in order to form an effective mud film on the excavation surface; when the particle size When the particle size is too large, the solid phase material cannot enter the pores in the formation to achieve a good plugging effect; when the particle size is too small, although the solid phase material can enter the formation pores, it will be affected by the formation water pressure and the pressure of the mud tank. is quickly washed away resulting in failure of the seal
Therefore, it is usually necessary to conduct model tests to select appropriate solid-phase materials in experiments based on geological reports. However, in actual construction, the formation conditions are complex and changeable, and geological reports cannot completely and accurately describe the formation conditions. , when the mud performance does not match the formation conditions, engineering quality and safety accidents are very likely to occur

Method used

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  • Efficient plugging film-forming shield slurry material for rescue and emergency
  • Efficient plugging film-forming shield slurry material for rescue and emergency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of macromolecule wrapping material, it is made by following steps:

[0039] Step 1. Take a certain amount of biological glue and add it to a 100ml Erlenmeyer flask. After adding N,N-dimethylformamide into the Erlenmeyer flask at a volume ratio of 1:20, place the Erlenmeyer flask at a constant temperature In a water bath environment, heat up and stir to completely dissolve the bio-glue;

[0040] Step 2, adding solid sodium hydroxide to the Erlenmeyer flask, adjusting the pH value of the mixed solution to 8, then heating and stirring for 30 minutes;

[0041] Step 3. After fully dissolving the modifier in N,N-dimethylformamide, drop the dissolved modifier into the Erlenmeyer flask using a constant pressure dropping funnel, and react at 65°C for 24 hours ;

[0042]Step 4, adding excess isopropanol to the solution after the reaction, and drying the precipitate after 1 hour of precipitation for subsequent use;

[0043] Step 5, fully dissolve the precipitate in disti...

Embodiment 2

[0048] A shield mud, calculated by weight percentage, comprises: 10% of a film-forming shield mud material for high-efficiency plugging and emergency rescue, and 90% of water.

[0049] The above-mentioned shield mud is prepared by the following steps: take a quantitative amount of the high-efficiency plugging film-forming shield mud material for emergency emergency use, add water and the high-efficiency plugging film-forming shield material for emergency emergency use in a container in proportion The mud material is stirred continuously to make it fully dissolved, and it is allowed to stand for 2 hours.

[0050] The high-efficiency plugging film-forming shield mud material for emergency rescue includes, by weight percentage: 72% of sodium bentonite, 15% of polymer wrapping material, 2% of styrene-maleic anhydride copolymer, and 10% of silicone resin emulsion. %, potassium laurate soap 1%.

[0051] The polymer wrapping material mentioned above is the polymer wrapping material ...

Embodiment 3

[0053] A shield mud, calculated by weight percentage, comprises: 10% of a film-forming shield mud material for high-efficiency plugging and emergency rescue, and 90% of water.

[0054] The preparation method of the above-mentioned shield mud is the same as that in Example 2.

[0055] The high-efficiency plugging film-forming shield mud material for emergency rescue includes, by weight percentage: 74% of sodium bentonite, 15% of polymer wrapping material, 1% of styrene-maleic anhydride copolymer, and 8% of silicone resin emulsion %, potassium laurate soap 2%.

[0056] The polymer wrapping material mentioned above is the polymer wrapping material prepared in Example 1.

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Abstract

The invention discloses an efficient plugging film-forming shield slurry material for rescue and emergency, wherein the material comprises the components in percentage by weight: 70-80% of bentonite,10-15% of a polymer coating material, 5-10% of a colloid enhancer, 1-3% of a polymer dispersant and 1-3% of an emulsifier. According to the invention, the polymer coating material and bentonite are combined in water to form elastic particles, so that mud prepared from the efficient plugging film-forming shield slurry material for rescue and emergency can effectively block stratum pores, and the stability of an excavation surface is improved.

Description

technical field [0001] The invention relates to the technical field of shield tunneling construction. More specifically, the present invention relates to a high-efficiency plugging film-forming shield mud material for emergency rescue. Background technique [0002] During mud-water shield excavation, the shield mud plays two important roles: one is to rely on the mud pressure to form a mud film or seepage area on the excavation surface to improve the soil strength of the excavation surface, and at the same time, the mud pressure balances the excavation surface soil pressure and water pressure to achieve the purpose of keeping the excavation surface in a stable state during construction; second, mud is used as a transport medium to transport all the excavated soil and sand to the outside of the working well; among them, the maintenance of the excavation surface Stability is the key to ensure the safe and smooth progress of shield tunneling construction. [0003] Specificall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
CPCC04B28/001C04B2111/00724C04B2201/10C04B2201/20C04B24/38C04B24/124C04B22/062C04B24/02C04B24/026C04B24/005C04B24/26C04B24/42C04B24/06Y02W30/30
Inventor 沈尔卜何源韩晓明李顺凯朱金彭吴克雄刘华
Owner CCCC WUHAN HARBOR ENG DESIGN & RES
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