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Grout material for subsea tunnel

A technology for grouting materials and subsea tunnels, applied in the field of grouting materials and grouting materials for subsea tunnels, can solve the problems of poor controllability and stability of cement grouting fluid, and achieve further hydration, convenient construction operations, The effect of good fluidity

Active Publication Date: 2017-08-04
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of poor controllability and stability of the existing cement grouting fluid, the present invention provides a grouting material for subsea tunnels, by adding composite additives to the existing Portland cement, thereby The final grouting material has good controllability and injectability, and the final stone body has good impermeability, which is very suitable for use in environments with rich groundwater such as subsea tunnels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A grouting material for subsea tunnels, the grouting material is a slurry with a water-cement ratio of 0.55 made by adding water to the powder, and the powder is mixed with 10% of its weight of composite additives in Portland cement , according to the percentage by weight, the active ingredient of the composite additive is 65% aluminum sulfate, 15% sodium sulfate, 5% sodium fluoride, 8% water reducer and 7% matrix, and the matrix is ​​a mass concentration of 4 % polyvinyl alcohol solution.

[0019] The above is the basic implementation of the present embodiment, further improvements, optimizations and limitations can be made on the basis of the above:

[0020] For example, the preparation method of the composite additive is as follows:

[0021] 1) According to the above ratio, weigh polyvinyl alcohol and dissolve it in water to form a matrix, and set aside;

[0022] 2) According to the proportions of the above substances, weigh aluminum hydroxide, sodium hydroxide, di...

Embodiment 2

[0029] A grouting material for subsea tunnels, the grouting material is a slurry with a water-cement ratio of 0.8 made by adding water to the powder, and the powder is mixed with Portland cement by adding 12% of its weight of composite additives , according to the percentage by weight, the active ingredient of the composite additive is 67% aluminum sulfate, 17% sodium sulfate, 4% sodium fluoride, 6% water reducer and 6% matrix, and the matrix is ​​a mass concentration of 1 % polyacrylamide solution.

[0030] The above is the basic implementation of the present embodiment, further improvements, optimizations and limitations can be made on the basis of the above:

[0031] For example, the preparation method of the composite additive is as follows:

[0032] 1) Weigh polyacrylamide according to the above ratio and dissolve it in water to form a matrix, and set aside;

[0033] 2) According to the proportions of the above-mentioned substances, weigh aluminum hydroxide, sodium hydr...

Embodiment 3

[0040] A grouting material for subsea tunnels, the grouting material is a slurry with a water-cement ratio of 1.0 made by adding water to the powder, and the powder is mixed with Portland cement by adding 20% ​​of its weight of composite additives , according to the percentage by weight, the active ingredient of the composite additive is 60% aluminum sulfate, 12% sodium sulfate, 6% sodium fluoride, 10% water reducer and 12% matrix, and the matrix is ​​a mass concentration of 1 % polyvinyl alcohol aqueous solution and polyacrylamide aqueous solution are mixed in equal weight ratio.

[0041] The above is the basic implementation of the present embodiment, further improvements, optimizations and limitations can be made on the basis of the above:

[0042] For example, the preparation method of the composite additive is as follows:

[0043] 1) Weigh polyvinyl alcohol or polyacrylamide in equal weight ratios according to the above ratio, mix and dissolve in water to form a matrix, ...

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Abstract

The invention discloses a grout material for subsea tunnel. The grout material contains compound additives; the effective component of the compound additives includes aluminum sulfate, sodium sulfate, sodium fluoride, water reducer and allowance of matrix, and the matrix is one or mixture of polyving akohol water solution and polyacrylamide solution. After combining with the matrix formed by the polyving akohol or polyacrylamide, the water reducing agent in the compound additive can be evenly dispersed in a cement paste system, the surface of the cement grain is covered, the cement grain surface energy is reduced, the cement granular aggregation is decreased, and massive free moistures are released; under the condition of using low water ash ratio, the grout fluid also can keep big fluidity, thus the paste fluid has good injecting property; meanwhile, the water reducing agent and the matrix also have the retarding effect; the grout fluid has good fluidity at the early period, and a certain pumping period, thereby facilitating the construction operation.

Description

technical field [0001] The invention relates to a grouting material in the field of inorganic materials, in particular to a grouting material for a subsea tunnel. Background technique [0002] Grouting technology comes from the special needs of underground engineering. Underground engineering often encounters ground water hazards and weak strata, which are commonly treated with grouting to improve the performance of rock and soil layers. Grouting has played a huge role in solving some engineering problems that are difficult to solve by conventional methods in modern engineering. Its biggest feature is that it can strengthen and improve the formation in situ. [0003] When grouting in general strata, to achieve good grouting effect, the grout should have the following characteristics: (1) The grout maintains good fluidity during the pumpable period and has good injectability; The time interval from the pumping period to the initial setting and final setting is relatively s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00724C04B2111/24C04B2201/50C04B22/148C04B22/147C04B22/126C04B2103/302C04B24/2623C04B24/2652
Inventor 林海燕马召林阳勇福焦雷郭献军王晓琳王玉江李广跃张文新王玥宋妍
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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