Preparation process of a synchronous grouting material for resisting scouring by flowing water of TBM

Abstract

The present invention belongs to the technical field of building materials, and particularly relates to a preparation process of a TBM synchronous grouting material resistant to dynamic water scouring. In the present invention, modified bentonite is used to prepare the matrix material, and at the same time, aminated silica fume and titanium dioxide-glass fiber composite material are added to prepare a TBM synchronous grouting material resistant to dynamic water scouring. Through the synergistic effect of multiple components, the grouting material is ensured to have good fluidity, while the compressive strength is improved and the shrinkage rate is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of building materials, and specifically relates to a preparation process of a TBM synchronous grouting material resistant to dynamic water scouring. Background Technique

[0002] The grouting technology refers to injecting grouting materials that can enhance the cementation between rock and soil mass media into the pores, fissures, soft strata, underground solution cavities, etc. of the rock and soil mass through a certain pressure method for filling and reinforcement, so as to enhance the integrity, stability and impermeability of the rock and soil mass, improve its physical and mechanical properties, and thus facilitate the smooth progress of engineering construction. There are many types of grouting materials, which can generally be divided into three categories: cement-based grouting materials, chemical grouting materials, and other grouting materials. TBM (Tunnel Boring Machine) grouting materials are mainly used to reinforce surrounding rocks, control groundwater and fill voids during tunnel construction to ensure the stability and waterproofness of the tunnel.

[0003] Chinese Patent (Publication No. CN114573278B) discloses a shield grouting material and its preparation method. The thickener added in the shield grouting material of this patent can greatly improve the water dispersion resistance of the shield grouting material, reduce the bleeding rate and delamination degree of the material, improve the stability of the material, and improve the comprehensive performance of the material; the silica fume in the thickener is amorphous spherical particles, with a relatively smooth surface, a large specific surface area and high activity. The tiny spherical particles can play a lubricating role and have extremely strong cementing force. However, this patent does not solve the problems of insufficient fluidity, low compressive strength and high shrinkage rate existing in the grouting materials in the prior art, which seriously affects its application scope.

[0004] Therefore, how to modify the main components of the grouting material, introduce suitable composite materials, ensure that the grouting material has good fluidity, while improving the compressive strength and reducing the shrinkage rate, has become the key direction to be overcome. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a preparation process of a TBM synchronous grouting material resistant to dynamic water scouring, aiming to solve the problems of insufficient fluidity, low compressive strength and high shrinkage rate existing in the grouting materials in the prior art.

[0006] The present invention uses modified bentonite to prepare the matrix material, and at the same time adds amino-functionalized silica fume and titanium dioxide-glass fiber composite material to prepare a TBM synchronous grouting material resistant to dynamic water scouring. Through the synergistic effect of multiple components, it ensures that the grouting material has good fluidity, while improving the compressive strength and reducing the shrinkage rate.

[0007] The technical solutions adopted by the present invention to solve the above technical problems are as follows:

[0008] The present invention provides a preparation process for a TBM synchronous grouting material resistant to scouring by flowing water, comprising the following steps:

[0009] Step S1: By weight, mix 30 - 40 parts of cement, 40 - 50 parts of mineral powder, 100 - 160 parts of fly ash, and 30 - 40 parts of bentonite for the first stirring treatment to obtain a matrix material;

[0010] Step S2: By weight, mix 200 - 290 parts of the matrix material, 20 - 30 parts of silica fume, 12 - 14 parts of glass fiber, 1 - 3 parts of defoamer, 1 - 3 parts of thickener, and 160 - 180 parts of deionized water for the second stirring treatment to obtain a TBM synchronous grouting material resistant to scouring by flowing water.

[0011] As a preferred technical solution of the present invention, the bentonite is modified bentonite; the preparation method of the modified bentonite includes: by weight, mix 6 - 8 parts of glacial acetic acid and 80 - 100 parts of deionized water evenly, then add 2 - 4 parts of chitosan and stir for 1 - 3 h, then add 4 - 6 parts of dimethyldiallylammonium chloride, stir and react at 50 - 60 °C for 20 - 30 min, after the reaction is completed, cool to room temperature, add 80 - 100 parts of acetone, centrifuge, wash the precipitate with absolute ethanol, and dry to obtain quaternized chitosan; mix 2 - 4 parts of glacial acetic acid and 90 - 100 parts of deionized water evenly, then add 4 - 6 parts of bentonite and 2 - 4 parts of the quaternized chitosan and stir for 40 - 60 min, filter, wash, and dry to obtain the modified bentonite.

[0012] Chitosan is introduced into the modified bentonite. By effectively adsorbing on the surface of bentonite particles, it prevents the agglomeration between particles, helps to improve the dispersibility of bentonite, and thus improves the overall fluidity of the grouting material; at the same time, the modified bentonite grouting material usually exhibits better thixotropy, with a reduced viscosity when shear force is applied, facilitating flow and effectively improving the fluidity of the grouting material.

[0013] As a preferred technical solution of the present invention, the silica fume is amino-functionalized silica fume; the preparation method of the amino-functionalized silica fume includes: by weight, add 4 - 6 parts of silica fume to 180 - 200 parts of deionized water and ultrasonically disperse for 40 - 60 min, then add 2 - 4 parts of 3-aminopropyltriethoxysilane, adjust the pH to 7.2 - 7.4, stir and react at 70 - 80 °C for 10 - 12 h, after the reaction is completed, centrifuge to obtain a solid, wash with deionized water, and vacuum dry to obtain the amino-functionalized silica fume.

[0014] The dispersibility and activity of silica fume after amino treatment are further improved, which helps to be more evenly distributed in the entire system of grouting materials, further refine the pore structure, reduce the porosity, make the microstructure of the material denser, and improve the density and compressive strength; at the same time, the amino group of silica fume forms a strong chemical bond, and the interfacial bonding enhanced by chemical bonding can effectively reduce the generation and development of microcracks, thereby improving the overall compressive strength of the grouting material.

[0015] As a preferred technical solution of the present invention, the glass fiber is a titanium dioxide-glass fiber composite material; the preparation method of the titanium dioxide-glass fiber composite material comprises: adding 4 to 6 parts of tetrabutyl titanate to 20 to 25 parts of anhydrous ethanol by weight to fully dissolve, then adding 1 to 3 parts of acetylacetone and 10 to 15 parts of deionized water and stirring for 20 to 30 minutes, then adding 6 to 8 parts of nitric acid solution with a molar concentration of 1 mol / L, stirring for 1 to 2 hours to obtain a sol solution; adding 10 to 15 parts of acidified glass fiber and 15 to 20 parts of anhydrous ethanol to 30 to 50 parts of the sol solution, stirring for 50 to 60 minutes, standing for 2 to 4 hours, removing the upper liquid to obtain a precipitate, washing the precipitate with anhydrous ethanol and deionized water in turn, and drying at 70 to 80° C. for 40 to 60 minutes to obtain the titanium dioxide-glass fiber composite material.

[0016] As a preferred technical solution of the present invention, the preparation method of the acidified glass fiber includes: adding 6 to 8 parts of phytic acid by weight to 90 to 100 parts of deionized water to fully dissolve, then adding 10 to 15 parts of glass fiber to soak for 10 to 20 minutes, washing with deionized water after soaking, and drying to obtain the acidified glass fiber.

[0017] As a preferred technical solution of the present invention, the diameter of the glass fiber is 3 to 7 μm.

[0018] In composite materials, titanium dioxide can be filled into the matrix to increase the volume density of the material, thereby reducing the volume shrinkage caused by water evaporation or chemical reactions. Glass fiber can form a network structure inside the material and effectively disperse stress. The two can work synergistically. Titanium dioxide fills the gaps between the fibers to make the entire system denser, and glass fiber provides a framework to help maintain the shape and dimensional stability of the material, effectively reducing the shrinkage rate of the material.

[0019] As a preferred technical solution of the present invention, the defoaming agent is selected from any one of tributyl phosphate, polydimethylsiloxane, and tripolyglycerol monostearate, or a combination of at least two thereof.

[0020] As a preferred technical solution of the present invention, the thickener is selected from any one of hydroxypropyl methylcellulose, polyvinyl pyrrolidone, and polyacrylamide, or a combination of at least two thereof.

[0021] As a preferred technical solution of the present invention, the conditions for the first stirring treatment include: stirring for 6 - 10 min under the condition of 800 - 1000 rpm.

[0022] As a preferred technical solution of the present invention, the conditions for the second stirring treatment include: stirring for 10 - 20 min under the condition of 600 - 800 rpm.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The modified bentonite of the present invention introduces the active substance chitosan. The introduction of chitosan makes the grouting material have better thixotropy, the viscosity decreases when shear force is applied, significantly improving the fluidity of the grouting material; at the same time, chitosan can undergo a crosslinking reaction with the amino groups of amino-functionalized silica fume, and the glass fibers in the titanium dioxide - glass fiber composite will generate active carboxyl groups after acidification, which can combine with chitosan to form amide bonds. In addition, the amino-functionalized silica fume and the carboxyl groups of acidified glass fibers can also combine with each other, thereby constructing a three-dimensional network structure, effectively improving the compressive strength of the grouting material and reducing the shrinkage rate.

[0025] (2) Chitosan is introduced into the modified bentonite of the present invention. By effectively adsorbing on the surface of bentonite particles, it prevents the aggregation between particles, helps to improve the dispersibility of bentonite, thereby improving the overall fluidity of the grouting material; at the same time, the modified bentonite grouting material usually shows better thixotropy, the viscosity decreases when shear force is applied, facilitating flow and effectively improving the fluidity of the grouting material.

[0026] (3) The amino-functionalized silica fume of the present invention has further improved dispersibility and activity after modification, which helps to be more evenly distributed throughout the grouting material system, further refining the pore structure, reducing the porosity, making the microstructure of the material more dense, improving the density and compressive strength; at the same time, the amino groups of silica fume form strong chemical bonds, enhancing the interfacial bonding through chemical bonding, effectively reducing the generation and development of microcracks, thereby improving the overall compressive strength of the grouting material.

[0027] (4) Titanium dioxide in the composite material of the present invention can be filled into the matrix, increasing the volume density of the material, thereby reducing the volume shrinkage caused by water evaporation or chemical reactions. Glass fibers can form a network structure inside the material, effectively dispersing stress; the two can act synergistically. Titanium dioxide fills the gaps between fibers to make the whole system more dense, and glass fibers provide a framework to help maintain the shape and dimensional stability of the material, effectively reducing the shrinkage rate of the material. Detailed implementation manners

[0028] For the convenience of understanding the present invention, the following examples are listed. Those skilled in the art should understand that the said examples are only for helping to understand the present invention and should not be regarded as specific limitations on the present invention.

[0029] The sources of some components in the examples and comparative examples are as follows:

[0030] Cement, product number CA-75, purchased from Zhengzhou Keri (Group) Refractory Materials Co., Ltd.;

[0031] Mineral powder, product number 6-9444, purchased from Lingshou Zhenying Mineral Products Processing Factory;

[0032] Fly ash, product number A01085, purchased from Wuhan Jiyesheng Chemical Co., Ltd.;

[0033] Bentonite, CAS number 1302-78-9, purchased from Shanghai Macklin Biochemical Co., Ltd.;

[0034] Silica fume, product number 1250, purchased from Lingshou Baiyi Mineral Products Processing Factory;

[0035] Glass fiber A, model EMG-250, diameter 5μm, purchased from Nanjing Fiberglass Research and Design Institute;

[0036] Glass fiber B, model T435N, diameter 12μm, purchased from Taishan Fiberglass Co., Ltd.;

[0037] Tributyl phosphate, CAS number 126-73-8, purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0038] Polydimethylsiloxane, CAS number 9006-65-9, purchased from Shanghai Macklin Biochemical Co., Ltd.;

[0039] Polyglycerol monostearate, CAS number 26855-43-6, purchased from Shanghai Macklin Biochemical Co., Ltd.;

[0040] Hydroxypropyl methylcellulose, product number H108814, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0041] Polyvinylpyrrolidone, product number PA73670, purchased from Shanghai Chuangsai Technology Co., Ltd.;

[0042] Polyacrylamide, product number P108471, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0043] Glacial acetic acid, CAS number 64-19-7, purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0044] Chitosan, product number C105799, purchased from Shanghai Aladdin Biochemical Technology Co., Ltd.;

[0045] Dimethyldiallylammonium chloride, CAS No. 7398-69-8, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0046] Acetone, CAS No. 67-64-1, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0047] 3-Aminopropyltriethoxysilane, CAS No. 919-30-2, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0048] Tetrabutyl titanate, product number PA86584, was purchased from Shanghai Chuangsai Technology Co., Ltd.;

[0049] Absolute ethanol, CAS No. 64-17-5, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0050] Acetylacetone, CAS No. 123-54-6, was purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0051] Nitric acid, CAS No. 7697-37-2, was purchased from Sinopharm Chemical Reagent Co., Ltd.

[0052] Preparation of modified bentonite: By weight, 8 parts of glacial acetic acid and 100 parts of deionized water were mixed evenly, then 4 parts of chitosan was added and stirred for 3 h, then 6 parts of dimethyldiallylammonium chloride was added, and the mixture was stirred and reacted at 60 °C for 20 min. After the reaction was completed, it was cooled to room temperature, 100 parts of acetone was added, centrifuged, and the precipitate was washed with absolute ethanol and dried to obtain quaternized chitosan; 4 parts of glacial acetic acid and 100 parts of deionized water were mixed evenly, then 6 parts of bentonite and 4 parts of the quaternized chitosan were added and stirred for 60 min, filtered, washed, and dried to obtain the modified bentonite.

[0053] Preparation of aminated silica fume: By weight, 6 parts of silica fume was added to 200 parts of deionized water and ultrasonically dispersed for 60 min, then 4 parts of 3-aminopropyltriethoxysilane was added, the pH was adjusted to 7.4, and the mixture was stirred and reacted at 80 °C for 10 h. After the reaction was completed, centrifugation was carried out to obtain a solid, which was washed with deionized water and dried under vacuum to obtain the aminated silica fume.

[0054] Preparation of titanium dioxide - glass fiber composite: (1) By weight, 8 parts of phytic acid are added to 100 parts of deionized water and fully dissolved, then 15 parts of glass fiber A (model EMG - 250, diameter 5 μm) are added and soaked for 20 min. After soaking, it is washed with deionized water and dried to obtain acidified glass fiber. (2) By weight, 6 parts of tetrabutyl titanate are added to 25 parts of absolute ethanol and fully dissolved, then 3 parts of acetylacetone and 15 parts of deionized water are added and stirred for 30 min, and then 8 parts of nitric acid solution with a molar concentration of 1 mol / L are added and stirred for 2 h to obtain a sol solution; 15 parts of acidified glass fiber and 20 parts of absolute ethanol are added to 50 parts of the sol solution, stirred and reacted for 60 min, left standing for 4 h, the upper liquid is removed to obtain a precipitate, and the precipitate is washed successively with absolute ethanol and deionized water and dried at 80 °C for 40 min to obtain the titanium dioxide - glass fiber composite.

[0055] Example 1

[0056] This example provides a preparation process of a TBM synchronous grouting material resistant to dynamic water scouring, including the following steps:

[0057] Step S1: By weight, 40 parts of cement, 50 parts of mineral powder, 160 parts of fly ash and 40 parts of modified bentonite are mixed and subjected to a first stirring treatment, stirred at 1000 rpm for 6 min to obtain a matrix material;

[0058] Step S2: By weight, 290 parts of the matrix material, 30 parts of aminated silica fume, 14 parts of titanium dioxide - glass fiber composite, 3 parts of defoamer tributyl phosphate, 3 parts of thickener hydroxypropyl methylcellulose and 180 parts of deionized water are mixed and subjected to a second stirring treatment, stirred at 800 rpm for 10 min to obtain a TBM synchronous grouting material resistant to dynamic water scouring.

[0059] Example 2

[0060] This example provides a preparation process of a TBM synchronous grouting material resistant to dynamic water scouring, including the following steps:

[0061] Step S1: By weight, 30 parts of cement, 40 parts of mineral powder, 100 parts of fly ash and 30 parts of modified bentonite are mixed and subjected to a first stirring treatment, stirred at 800 rpm for 10 min to obtain a matrix material;

[0062] Step S2: Mix 200 parts of the matrix material, 20 parts of aminated silica fume, 12 parts of titanium dioxide - glass fiber composite material, 1 part of defoaming agent polydimethylsiloxane, 1 part of thickening agent polyvinylpyrrolidone, and 160 parts of deionized water for the second stirring treatment, and stir for 20 min under the condition of 600 rpm to obtain the anti - dynamic water scouring TBM synchronous grouting material.

[0063] Example 3

[0064] This example provides a preparation process for an anti - dynamic water scouring TBM synchronous grouting material, including the following steps:

[0065] Step S1: Mix 35 parts of cement, 45 parts of mineral powder, 135 parts of fly ash, and 35 parts of modified bentonite for the first stirring treatment, and stir for 8 min under the condition of 900 rpm to obtain the matrix material;

[0066] Step S2: Mix 250 parts of the matrix material, 25 parts of aminated silica fume, 13 parts of titanium dioxide - glass fiber composite material, 2 parts of defoaming agent triglycerol monostearate, 2 parts of thickening agent polyacrylamide, and 170 parts of deionized water for the second stirring treatment, and stir for 15 min under the condition of 700 rpm to obtain the anti - dynamic water scouring TBM synchronous grouting material.

[0067] Comparative Example 1

[0068] This comparative example provides a preparation process for a grouting material, which is different from Example 1 in that commercially available bentonite is used to replace the modified bentonite, commercially available silica fume is used to replace the aminated silica fume, and glass fiber A is used to replace the titanium dioxide - glass fiber composite material.

[0069] Comparative Example 2

[0070] This comparative example provides a preparation process for a grouting material, which is different from Comparative Example 1 in that the modified bentonite is used to replace the commercially available bentonite.

[0071] Comparative Example 3

[0072] This comparative example provides a preparation process for a grouting material, which is different from Comparative Example 1 in that the aminated silica fume is used to replace the commercially available silica fume.

[0073] Comparative Example 4

[0074] This comparative example provides a preparation process for a grouting material, which is different from Comparative Example 1 in that the titanium dioxide - glass fiber composite material is used to replace the glass fiber A.

[0075] Comparative Example 5

[0076] This comparative example provides a preparation process of a grouting material. The difference from Comparative Example 4 is that glass fiber B is used to replace glass fiber A for the preparation of titanium dioxide - glass fiber composite material.

[0077] Comparative Example 6

[0078] This comparative example provides a preparation process of a grouting material. The difference from Example 1 is that commercially available bentonite is used to replace the modified bentonite.

[0079] Comparative Example 7

[0080] This comparative example provides a preparation process of a grouting material. The difference from Example 1 is that commercially available silica fume is used to replace the aminated silica fume.

[0081] Comparative Example 8

[0082] This comparative example provides a preparation process of a grouting material. The difference from Example 1 is that glass fiber A is used to replace the titanium dioxide - glass fiber composite material.

[0083] The properties of the grouting materials provided in the above examples and comparative examples were tested. The test methods are as follows:

[0084] (1) Fluidity test: The test was carried out referring to the requirements of "GB / T 2419 - 2005 Test Method for Fluidity of Cement Mortar".

[0085] (2) Compressive strength test: The test was carried out referring to the requirements of "DB42 / T 1218 - 2016 Synchronous Grouting Material for Shield Tunnels".

[0086] (3) Shrinkage rate test: The test was carried out referring to the requirements of "DB42 / T 1218 - 2016 Synchronous Grouting Material for Shield Tunnels".

[0087] The above performance test data are shown in Table 1.

[0088] Table 1 Performance Test Results

[0089]

[0090] As can be seen from the above, the present invention prepares the matrix material by using the modified bentonite, and at the same time adds the aminated silica fume and the titanium dioxide - glass fiber composite material to prepare the anti - hydrodynamic scouring TBM synchronous grouting material (Examples 1 - 3), with a fluidity of 201 - 205 mm, a compressive strength (28d) of 9.2 - 9.7 MPa, and a shrinkage rate of 4.1 - 4.6%.

[0091] Compared with Example 1, when using commercially available bentonite to replace the modified bentonite, commercially available silica fume to replace the aminated silica fume, and fiberglass A to replace the titanium dioxide-fiberglass composite material, the fluidity decreases, the compressive strength becomes smaller, and the shrinkage rate increases (Comparative Example 1); compared with Comparative Example 1, when using the modified bentonite to replace the commercially available bentonite, the fluidity increases (Comparative Example 2); compared with Comparative Example 1, when using the aminated silica fume to replace the commercially available silica fume, the compressive strength becomes larger (Comparative Example 3); compared with Comparative Example 1, when using the titanium dioxide-fiberglass composite material to replace fiberglass A, the shrinkage rate decreases (Comparative Example 4); compared with Comparative Example 4, when using fiberglass B to replace fiberglass A for the preparation of the titanium dioxide-fiberglass composite material, since the diameter of fiberglass B is too large and the modification effect is poor, the shrinkage rate increases (Comparative Example 5); compared with Example 1, when using commercially available bentonite to replace the modified bentonite, the fluidity decreases, the compressive strength becomes smaller, and the shrinkage rate increases (Comparative Example 6); compared with Example 1, when using commercially available silica fume to replace the aminated silica fume, the fluidity decreases, the compressive strength becomes smaller, and the shrinkage rate increases (Comparative Example 7); compared with Example 1, when using fiberglass A to replace the titanium dioxide-fiberglass composite material, the fluidity decreases, the compressive strength becomes smaller, and the shrinkage rate increases (Comparative Example 8).

[0092] In summary, the present invention uses the modified bentonite to prepare the matrix material, and at the same time adds the aminated silica fume and the titanium dioxide-fiberglass composite material to prepare the anti-dynamic water scouring TBM synchronous grouting material. Through the synergistic effect of multiple components, it is ensured that the grouting material has good fluidity, while improving the compressive strength and reducing the shrinkage rate.

Claims

1. Preparation process of a TBM synchronous grouting material resistant to scouring by flowing water It is characterized in that it includes the following steps: Step S1: Taking parts by weight, mixing 30 - 40 parts of cement, 40 - 50 parts of mineral powder, 100 - 160 parts of fly ash and 30 - 40 parts of modified bentonite for the first stirring treatment to obtain a matrix material; Step S2: Taking parts by weight, mixing 200 - 290 parts of the matrix material, 20 - 30 parts of aminated silica fume, 12 - 14 parts of titanium dioxide - glass fiber composite material, 1 - 3 parts of defoamer, 1 - 3 parts of thickener and 160 - 180 parts of deionized water for the second stirring treatment to obtain an anti - dynamic water scouring TBM synchronous grouting material; The preparation method of the modified bentonite includes: Taking parts by weight, mixing 6 - 8 parts of glacial acetic acid and 80 - 100 parts of deionized water evenly, then adding 2 - 4 parts of chitosan and stirring for 1 - 3 h, then adding 4 - 6 parts of dimethyldiallylammonium chloride, stirring and reacting at 50 - 60 °C for 20 - 30 min, after the reaction is completed, cooling to room temperature, adding 80 - 100 parts of acetone, centrifuging, washing the precipitate with absolute ethanol, and drying to obtain quaternized chitosan; mixing 2 - 4 parts of glacial acetic acid and 90 - 100 parts of deionized water evenly, then adding 4 - 6 parts of bentonite and 2 - 4 parts of the quaternized chitosan and stirring for 40 - 60 min, filtering, washing, and drying to obtain the modified bentonite; The preparation method of the aminated silica fume includes: Taking parts by weight, adding 4 - 6 parts of silica fume into 180 - 200 parts of deionized water and ultrasonically dispersing for 40 - 60 min, then adding 2 - 4 parts of 3 - aminopropyltriethoxysilane, adjusting the pH to 7.2 - 7.4, stirring and reacting at 70 - 80 °C for 10 - 12 h, after the reaction is completed, centrifuging to obtain a solid, washing with deionized water, and vacuum - drying to obtain the aminated silica fume; The preparation method of the titanium dioxide - glass fiber composite material includes: Taking parts by weight, adding 4 - 6 parts of tetrabutyl titanate into 20 - 25 parts of absolute ethanol and fully dissolving, then adding 1 - 3 parts of acetylacetone and 10 - 15 parts of deionized water and stirring for 20 - 30 min, then adding 6 - 8 parts of nitric acid solution with a molar concentration of 1 mol / L and stirring for 1 - 2 h to obtain a sol solution; adding 10 - 15 parts of acidified glass fiber and 15 - 20 parts of absolute ethanol into 30 - 50 parts of the sol solution, stirring and reacting for 50 - 60 min, standing for 2 - 4 h, removing the upper liquid to obtain a precipitate, washing the precipitate with absolute ethanol and deionized water in sequence, and drying at 70 - 80 °C for 40 - 60 min to obtain the titanium dioxide - glass fiber composite material.

2. According to the preparation process of an anti - dynamic water scouring TBM synchronous grouting material as described in claim 1, it is characterized in that The preparation method of the acidified glass fiber includes: Taking parts by weight, adding 6 - 8 parts of phytic acid into 90 - 100 parts of deionized water and fully dissolving, then adding 10 - 15 parts of glass fiber and soaking for 10 - 20 min, after soaking, washing with deionized water and drying to obtain acidified glass fiber.

3. The preparation process of a TBM synchronous grouting material resistant to scouring by flowing water according to claim 2, characterized in that, the diameter of the glass fiber is 3-7 μm.

4. The preparation process of a TBM synchronous grouting material resistant to scouring by flowing water according to claim 1, characterized in that, the defoaming agent is selected from any one or a combination of at least two of tributyl phosphate, polydimethylsiloxane, and trimeric glycerol monostearate.

5. The preparation process of a TBM synchronous grouting material resistant to scouring by flowing water according to claim 1, characterized in that, the thickening agent is selected from any one or a combination of at least two of hydroxypropyl methylcellulose, polyvinylpyrrolidone, and polyacrylamide.

6. The preparation process of a TBM synchronous grouting material resistant to scouring by flowing water according to claim 1, characterized in that, the conditions of the first stirring treatment include: stirring at 800-1000 rpm for 6-10 min.

7. The preparation process of a TBM synchronous grouting material resistant to scouring by flowing water according to claim 1, characterized in that, the conditions of the second stirring treatment include: stirring at 600-800 rpm for 10-20 min.

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