CN115626789A - Low-carbon anti-permeability grouting material for filling back of TBM tunnel lining and preparation method thereof - Google Patents
Low-carbon anti-permeability grouting material for filling back of TBM tunnel lining and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/06—Oxides, Hydroxides
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00724—Uses not provided for elsewhere in C04B2111/00 in mining operations, e.g. for backfilling; in making tunnels or galleries
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/70—Grouts, e.g. injection mixtures for cables for prestressed concrete
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to a solid waste base low-carbon anti-permeability back grouting material and a preparation method thereof. The solid waste base grouting material comprises the following components in parts by weight: 200-320 parts of base material; 18.5-57 parts of special densifier; 140-200 parts of water. The base material comprises the following components in parts by weight: 20-40 parts of ordinary portland cement, 30-60 parts of mineral powder, 80-180 parts of fly ash, 30-70 parts of furnace slag, 25-60 parts of bentonite and 20-30 parts of biomass ash. The special densifier comprises the following components: silica fume, nano SiO2, a defoaming agent and sunflower stalk ash. According to the invention, the filling and compacting effect is formed by doping the superfine mineral material into the cement-based material, the material compacting degree is further improved by regulating and controlling the content of air bubbles in a material system and the alkalinity of a pore solution, the high added value utilization of various bulk solid wastes is realized, and the grouting material at the back of the tunnel lining is prepared and obtained. The material is used for grouting behind tunnel linings of urban subways TBM, can realize safety and greenness of back filling of tunnel linings, can change a filling layer into a functional layer, and greatly improves the anti-permeability performance of a tunnel structure.
Description
Technical Field
The invention belongs to the technical field of tunnel lining back grouting materials for urban subway TBM tunnels, and particularly relates to a low-carbon anti-permeability grouting material for back filling of a TBM tunnel lining and a preparation method thereof.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
The TBM construction method has been widely used in tunnel construction. However, the TBM construction process also faces the risk of segment dislocation, crack and water leakage, which brings a series of difficulties and challenges to the TBM construction. In the TBM tunneling process, the excavation diameters of the cutter head and the shield body are usually slightly larger than the ring forming diameter of the duct piece, so that when the duct piece is separated from the shield tail, if the bottom of the duct piece is not filled in time, the duct piece sinks under the action of gravity, the tunnel line which cannot be recovered is changed, and serious risks are brought to construction safety.
The TBM tunnel lining back grouting is a technology for timely filling the pea gravel hole in the annular gap between the duct piece and the surrounding rock after the duct piece is separated from the shield tail by a distance through a hoisting hole in the center of the duct piece and a matched grouting system. The back grouting of the tunnel lining can timely glue the scattered pea gravel into a pea gravel cementing body with certain strength, and the pea gravel cementing body is cemented with the duct piece and the surrounding rock together to bear force together to form a self-stabilizing structure, thereby ensuring the early stability of the duct piece lining, further reducing the ground subsidence and ensuring the safety of the surrounding environment. In addition, the stone body hardened by the grouting slurry behind the back is a first layer of protective ring after the TBM tunnel is lined, and the impermeability of the whole tunnel structure is greatly improved.
The commonly used tunnel lining back grouting material is ordinary portland cement single-liquid slurry, and cement has the defects of slow setting and hardening, high water precipitation rate, high hydration heat and large carbon emission, so that the structure is easy to crack, the impermeability is greatly reduced, and the treatment effect of the seepage water engineering is seriously influenced.
Disclosure of Invention
In order to solve the problems, the invention provides a low-carbon anti-permeability grouting material for filling the back of a TBM tunnel lining, and a preparation method and application thereof. The low-carbon anti-permeability grouting material can further improve the anti-permeability effect of grouting at the back of the tunnel lining and reduce the carbon emission of the grouting material. The low-carbon impervious grouting material has the advantages of good impermeability, good stability, high strength and the like, and is beneficial to realizing clean production and high value-added utilization of industrial solid wastes.
In order to solve the above technical problems, the present invention provides the following technical solutions.
First aspect of the invention: the special densifier for TBM tunnel lining back grouting material is provided, and comprises the following components: silica fume, nano SiO 2 Defoaming agent and sunflower stalk ash.
The invention researches a novel low-carbon anti-permeability back grouting material, and is applied to the engineering to realize safe and efficient construction, energy conservation and emission reduction of tunnels.
The second aspect of the invention provides a preparation method of a special densifier for TBM tunnel lining back grouting material, which comprises the following steps:
mixing silica fume, nano SiO 2 Mixing the defoaming agent and sunflower stalk ash for 2-3 min.
The invention provides a TBM tunnel lining back grouting material, which comprises the following raw materials in parts by weight: 200-320 parts of base material; 18.5-57 parts of a special densifier; 140-200 parts of water;
the base material comprises the following raw materials in parts by weight: 20-40 parts of ordinary portland cement, 30-60 parts of mineral powder, 80-180 parts of fly ash, 30-70 parts of furnace slag, 25-60 parts of bentonite and 20-30 parts of biomass ash.
The invention provides a preparation method of a TBM tunnel lining back grouting material, which comprises the following steps:
weighing various raw materials according to the weight ratio;
mixing ordinary portland cement, mineral powder, fly ash, furnace slag, bentonite and biomass ash uniformly for 3min at a ratio of 600-800rpm/min to prepare a matrix material;
uniformly mixing the matrix material, the special densifier and water in proportion at 600-800rpm/min for 3min to prepare the low-carbon anti-permeability grouting material for filling the back of the TBM tunnel lining.
In a fifth aspect of the invention, the application of the TBM tunnel lining back grouting material in impervious filling is provided.
The invention has the beneficial effects that:
(1) The invention provides a special densifier aiming at the problem of poor impermeability of a solid waste base cementing material system. On one hand, the filling and compacting effects of the special densifier can fill the gaps of the solid waste base cementing material, so that the compactness of the solidified body is improved; on the other hand, active SiO in the special densifier 2 Under alkaline environment with the base materialThe reaction further improves the compaction degree of a cementing system, greatly enhances the impermeability of the grouting material, and plays a role in protecting the tunnel lining segment.
(2) The invention aims to carry out high added value utilization on industrial solid wastes, prepares the industrial solid wastes into the TBM tunnel lining back grouting material, and greatly reduces the using amount of cement while meeting the performance requirements, thereby greatly reducing the carbon emission of a material system and being beneficial to realizing the aims of carbon peak reaching and carbon neutralization.
(3) By utilizing the industrial solid wastes with high added value, the problem of environmental pollution caused by the accumulation of a large amount of solid wastes is greatly relieved, and green environmental protection is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic representation of a TBM behind-the-wall barrier grouting.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The invention provides a low-carbon anti-permeability grouting material for filling the back of a TBM tunnel lining and a preparation method thereof. The invention is applied to grouting behind the lining of a TBM tunnel, as shown in figure 1, the number of circles from the outermost circle in figure 1 represents the stratum outside the tunnel, the circle adjacent to the stratum represents the cementing body filled between the pipe piece and the stratum, the grouting material and the pea gravel are included, the third circle represents the pipe piece of the tunnel, and the innermost circle represents the tunnel.
In a first aspect, the present invention provides a material densifier comprising the following components: silica fume, nano SiO 2 Defoaming agent and sunflower stalk ash.
The silicon ash is silicon smelted in ferrosilicon plants and metal plantsThe superfine silicon powder material is collected from the smoke dust during the preparation of ferroalloy or metallic silicon. The annual output of the silica fume is large, and if the silica fume can not be reasonably utilized, the silica fume is directly discharged into the environment, so that the environment is seriously polluted. If the silica fume is used as an admixture for grouting behind the lining of the TBM tunnel, on one hand, the use amount of cement can be saved, the cost is reduced, and the environmental pollution is effectively reduced; on the other hand, the silica fume not only can play a role in filling, but also has good activity, and reacts with a matrix material in an alkaline environment, so that the compactness of a cementing system is further improved, the impermeability of the grouting material is greatly enhanced, and the tunnel lining segment is protected. Nano SiO 2 Similar to silica fume, the active SiO provided by the method can fully fill the gaps of the material due to extremely small particle size 2 The slurry has chemical reaction with the matrix material, so that the compactness of the grouting material is improved, and the impermeability of the material is further improved; the defoaming agent used in the invention is a powder defoaming agent, the chemical components are mineral oil and polyethylene glycol, and the defoaming agent mainly has the function of reducing the surface tension of the liquid in a suspension system, thereby greatly reducing bubbles or foams in the system and reducing the porosity of a cementing material; the sunflower stalk ash is ash produced after sunflower stalks are combusted, and has high K 2 And the content of O is usually more than or equal to 35 percent, so that alkaline substances can be slowly released into the mixed suspension to promote long-term hydration and continuous densification of the material, and in addition, calcium silicon oxide in the sunflower stalk ash is beneficial to forming a hydration product C-S-H in a material system, which has positive influence on the compactness of the material.
In some embodiments, silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 6-20:2-8:0.5-2:10-30.
In some embodiments, silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 6:2:0.5:10.
Further, silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 8:8:2:20.
Further, silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 20:6:1:30。
further, silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 12:2:2:25.
Further, silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 16:4:1.5:20.
In some embodiments, the defoamer is a silicone powder defoamer.
In a second aspect, the invention provides a preparation method of the material densifier, which comprises the following steps:
mixing silica fume, nano SiO 2 Mixing the defoaming agent and the sunflower stalk ash according to a certain proportion, and uniformly stirring to obtain the sunflower stalk ash.
In a third aspect, the invention provides a base material, which comprises the following components in parts by weight: 20-40 parts of ordinary portland cement, 30-60 parts of mineral powder, 80-180 parts of fly ash, 30-70 parts of furnace slag, 25-60 parts of bentonite and 20-30 parts of biomass ash.
Wherein a small amount of ordinary portland cement is mainly responsible for early strength in the system, slag, fly ash and mineral powder are used as mineral admixture to play a secondary hydration role in the system, bentonite plays a role in improving the stability of the material, and biomass ash has high K 2 The content of O can be used as an alkali source to play an alkali excitation role, and the activity of the mineral admixture is further excited.
The industrial solid wastes such as furnace slag, fly ash, mineral powder, biomass ash and the like have potential gelling activity, and amorphous glass bodies contained in the industrial solid wastes can be subjected to secondary hydration under an alkaline environment and cause volume micro-expansion of the agglomerated stone bodies. The addition proportion of the bentonite is not suitable to be too large, and the excessive bentonite can increase the free water of a system, so that the strength and the impermeability are reduced. The bentonite can absorb water molecules, so that the molecular distance is increased, the bentonite particles are expanded, and the later-stage volume retraction problem of the slurry concretion body can be effectively relieved; once the bentonite particles absorb water, the charges in the molecules are saturated, and water molecules can be prevented from passing through the saturated charges, so that the bentonite is ensured to have extremely low water permeability, and the bentonite has an excellent waterproof barrier effect, and the impermeability of a grouting material behind the lining of the TBM tunnel is further improved. The solid waste material is used as an industrial byproduct, and the carbon emission caused by the production of the solid waste material is greatly reduced compared with that of a cement material. The carbon emission of the matrix material containing solid wastes is reduced by about 80 percent compared with that of cement on average, and the method conforms to the low-carbon, green and sustainable development concept.
The four reasons for solid waste were chosen:
the slag contains active aluminosilicate, so the slag has a secondary hydration function. The slag is used as mineral admixture for TBM tunnel lining back grouting, so that the problem of large amount of stacked slag can be relieved, the pollution to the environment can be reduced, and good economic benefit and environmental benefit are achieved.
The mineral powder has high activity, can obtain the strength similar to that of cement when being excited by an alkali exciting agent alone, is a mineral admixture with the most wide application, and is widely applied to concrete and various cement products. The chemical components of the mineral powder mainly comprise CaO and SiO 2 And Al 2 O 3 Similar to cement, the additive can greatly improve the strength and the impermeability of a system when being added into a grouting material.
The fly ash is fly ash generated during the combustion of coal powder in a thermal power plant, the content of active amorphous glass body of the fly ash exceeds half of the self weight, secondary hydration can be generated in an alkaline environment, and the later strength of the material is further improved. In addition, the fly ash has finer particles, and can fill gaps among mixed particles, so that the compactness of the material is improved.
Biomass ash is a solid byproduct generated in the biomass combustion process, and is generally used as a base material of an alkali-activated system because the biomass ash is rich in SiO 2 CaO and Al 2 O 3 . At the same time, the biomass ash has a high K 2 The content of O and high alkalinity can excite the vitreous body in the solid waste to play a potential hydration role.
In a fourth aspect, the invention provides a TBM tunnel lining back grouting material, which comprises the following components in parts by weight: 200-320 parts of the base material; 18.5-57 parts of the special densifier; 140-200 parts of water.
In some embodiments, the silica fume in the densifier is 1.2% to 4% by mass of the back slip material.
The average grain size of the silica fume is very small, and the silica fume can increase the compactness of the system and greatly improve the anti-permeability performance of the material when being added into a gelling system. However, when the silica fume content is greater than 4%, the free water content in the system is greatly reduced, water needs to be added into the system to maintain the same fluidity, the water-cement ratio of the slurry is increased, and the mechanical property and the impermeability of the slurry are obviously reduced. And by combining the early test result, the mass fraction of the silica fume in the material system is more reasonable from 1.2 percent to 4 percent.
In some embodiments, the nano-SiO in the densifier 2 The mass percentage of the back grouting material is 0.4-1.6%.
Nano SiO 2 The particle size of the particles is extremely small, the average particle size is nano-scale, and a small amount of the particles can form good gradation with a gelling system and silica fume, so that the integral compactness of the material is greatly improved. However, nano SiO 2 The excessive addition of the water-soluble organic acid can result in the increase of water demand of a system, and further influences the performance of the material. Earlier stage research shows that the nanometer SiO of TBM tunnel lining back grouting material 2 The content should not be higher than 1.6%.
In some embodiments, the defoamer in the densifier is present in the back grouting material in a mass percentage of 0.1% to 0.4%.
The defoamer can improve the porosity and mechanical property of the cement-based material, and a large amount of bubbles can be mixed in the freshly mixed slurry after stirring, conveying and wall filling, so that the porosity, mechanical property and impermeability of the material are improved. The defoaming agent is uniformly dispersed in the material system to reduce the surface tension of the suspension, and then bubbles in the system are discharged out of the material. When the mixing amount of the defoaming agent is more than 0.4%, the improvement effect of the defoaming agent on a system is not obvious, and the continuous increase can cause the waste of additives and influence the economy. Therefore, considering the comprehensive performance and economy of the material, the defoaming agent content of the TBM tunnel lining back grouting material is not higher than 0.4%.
In some embodiments, the sunflower stalk ash in the densification agent is present in the back slip casting material in an amount of 2% to 6% by weight.
The sunflower stalk ash is ash produced after sunflower stalks are combusted, and has high K 2 The content of O is usually more than or equal to 35 percent, so that alkaline substances can be slowly released into the mixed suspension liquid, and the long-term hydration and continuous densification of the material are promoted. In addition, calcium silicon oxide in the sunflower stalk ash is beneficial to the formation of hydration products C-S-H in a material system, which has positive influence on the compactness of the material. Sunflower stalk ash medium K 2 The release rate of O is slow, the densification effect on the material mainly occurs in the late stage of hydration, and therefore, the early strength of the material system is influenced by the excessively high content. Therefore, the early-stage performance and the long-term performance of the material are comprehensively considered, and the sunflower stalk ash content of the TBM tunnel lining back grouting material is proper to be 2-6%.
In some embodiments, the TBM tunnel lining back grouting material comprises the following components in parts by weight: 200 parts of base material, 6 parts of silica fume and nano SiO 2 2 parts of defoaming agent, 0.5 part of sunflower stalk ash and 140 parts of water.
In some embodiments, the TBM tunnel lining back grouting material comprises the following components in parts by weight: 200 parts of base material, 8 parts of silica fume and nano SiO 2 8 parts of defoaming agent, 2 parts of sunflower stalk ash and 200 parts of water.
In some embodiments, the TBM tunnel lining back grouting material comprises the following components in parts by weight: 260 parts of base material, 20 parts of silica fume and nano SiO 2 6 parts of defoaming agent 1 part, 30 parts of sunflower stalk ash and 170 parts of water.
In some embodiments, the TBM tunnel lining back grouting material comprises the following components in parts by weight: 320 parts of base material, 12 parts of silica fume and nano SiO 2 2 parts of defoaming agent, 2 parts of sunflower stalk ash and 170 parts of water.
In some embodiments, the TBM tunnel lining back grouting material comprises the following components in parts by weight: 320 parts of base material, 16 parts of silica fume and nano SiO 2 4 parts of defoaming agent, 1.5 parts of sunflower stalk ash and 200 parts of water.
In a fifth aspect, the invention provides a preparation method of the TBM tunnel lining back grouting material, which comprises the following steps:
weighing various raw materials according to the weight ratio;
uniformly mixing ordinary portland cement, mineral powder, fly ash, furnace slag, bentonite and biomass ash in proportion for 3min to prepare a grouting matrix material;
uniformly mixing the matrix material, the special densifier and water in proportion for 3min to prepare the TBM tunnel lining back grouting material.
In some embodiments, the particle size of the base material and sunflower stalk ash is less than 37 μm, the average particle size of the silica ash is 0.1-0.15 μm, and the SiO is nanometer 2 Has an average particle diameter of 20nm and a solid content of the defoaming agent of not less than 99%. The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.
In the following examples, silica fume was purchased from denna zernike new materials, inc.
Nanosilica was purchased from Shanghai Chaowei nanotechnology, inc.
The defoaming agent is an organic silicon powder defoaming agent and is purchased from Jinan Xinglong chemical Co.
Sunflower stalk ash was purchased from Zheng, henan.
Example 1
A TBM tunnel lining back grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the base material to the fineness of less than 37 mu m by using a planetary ball mill, screening by using a screening machine, and performing an experiment for later use;
step two: weighing raw materials according to the mass fraction, wherein the raw materials comprise 200 parts of base material, 6 parts of silica fume and nano SiO 2 2 parts of defoaming agent, 0.5 part of sunflower stalk ash and 140 parts of water.
The base material comprises the following components in parts by weight: 20 parts of ordinary portland cement, 45 parts of mineral powder, 80 parts of fly ash, 30 parts of furnace slag, 25 parts of bentonite and 20 parts of biomass ash.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3min at the speed of 600-800 rpm/min.
Step four: and pouring the stirred material into a corresponding mold, maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃, and testing the working performance of the material at the age of 28d and 180d respectively.
The TBM tunnel lining back grouting material prepared in the embodiment is subjected to tests on impermeability, porosity and mechanical property of a slurry stone body, and the test results are shown in tables 1-1 and 1-2:
TABLE 1-1 calculus body impermeability and porosity of TBM Tunnel Lining Back grouting Material
The impervious pressure reflects the ability of the material to resist water pressure, the permeability coefficient indicates the ability of the aggregate to penetrate water, and the porosity reflects the degree of compaction of the aggregate. The higher the permeation resistance pressure is, the stronger the water pressure resistance of the material is; the larger the permeability coefficient is, the larger the porosity of the material is, and the stronger the water permeability is; lower porosity indicates a denser material. The experimental result shows that the addition of a large amount of active mineral admixture and a special densifier promotes the secondary hydration effect and the pore filling effect of the material, the 28d seepage pressure resistance and the permeability coefficient of the stone body under the mixture ratio are superior to those of the conventional cement slurry, and the porosity of the stone body is lower; due to the continuous excitation effect of the sunflower stalk ash, the 180d permeability coefficient of the calculus bodies is reduced by 21.0 percent compared with 28d, which shows that the calculus bodies are continuously hydrated and densified in the age of 28d to 180 d.
TABLE 1-2 mechanical properties of stone of TBM tunnel lining back grouting material
The compressive and flexural strength reflects the ability of the stone body to resist external force damage. The compressive strength indicates the vertical pressure resistance of the stone body, and the flexural strength indicates the bending moment resistance of the stone body. The result shows that as a small amount of the antifoaming agent and the biomass ash are added, the 28d compressive and flexural strength of the stone-forming body under the proportion is stronger, the flexural-compression ratio is 0.28, and compared with the traditional cement-based material, the grouting material has higher flexural-compression ratio; due to the continuous excitation effect of the sunflower stalk ash, the 180d compressive strength of the concretion body is increased by 12.1% compared with 28d, which indicates that the concretion body is continuously hydrated in the age of 28d to 180 d.
Example 2
A TBM tunnel lining back grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the base material by using a planetary ball mill until the fineness is less than 37 mu m, screening by using a screening machine and then carrying out an experiment for later use;
step two: weighing raw materials according to the mass fraction, wherein the raw materials comprise 200 parts of base material, 8 parts of silica fume and nano SiO 2 8 parts of defoaming agent, 2 parts of sunflower stalk ash and 200 parts of water.
The base material comprises the following components in parts by weight: 40 parts of ordinary portland cement, 30 parts of mineral powder, 180 parts of fly ash, 70 parts of furnace slag, 40 parts of bentonite and 30 parts of biomass ash.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3min at the speed of 600-800 rpm/min.
Step four: and pouring the stirred material into a corresponding mold, maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃, and testing the working performance of the material at the age of 28d and 180d respectively.
The TBM tunnel lining back grouting material prepared in the embodiment is subjected to tests on impermeability, porosity and mechanical property of a slurry stone body, and the test results are shown in tables 2-1 and 2-2:
TABLE 2-1 calculus body impermeability of TBM Tunnel Lining Back grouting materials
The result shows that the cement-water ratio of the slurry is higher, the doping amount of the densifier is smaller, and a material system is difficult to form a very compact material, so the 28d seepage resistance pressure of the stone body is smaller, the 28d permeability coefficient is larger, and the 28d porosity is higher; due to the continuous excitation of the sunflower stalk ash with higher content, the 180d permeability coefficient of the stone body is reduced by 35.2 percent compared with 28d, which shows that the stone body is continuously hydrated and densified in the age of 28d to 180 d.
TABLE 2-2 mechanical properties of stone of TBM tunnel lining back grouting material
The result shows that the compression strength and the breaking strength of the material are low because the water-cement ratio of the slurry is high and the doping amount of the densifier is small, and the material system is difficult to form a very compact material; in addition, due to the addition of a large amount of defoaming agent and biomass ash, the compression ratio of the material is about 0.32, and compared with the traditional grouting material, the material has higher compression ratio and higher toughness; due to the continuous excitation effect of the high-content sunflower stalk ash, the 180d compressive strength of the stone body is increased by 20.1% compared with 28d, which shows that the stone body is continuously hydrated in the age of 28d to 180d and has a large hydration degree.
Example 3
A TBM tunnel lining back grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the base material to the fineness of less than 37 mu m by using a planetary ball mill, screening by using a screening machine, and performing an experiment for later use;
step two: weighing raw materials in parts by mass, wherein the raw materials comprise 260 parts of base material, 20 parts of silica fume and nano SiO 2 6 parts of defoaming agent, 1 part of sunflower stalk ash and 170 parts of water.
The base material comprises the following components in parts by weight: 30 parts of ordinary portland cement, 45 parts of mineral powder, 130 parts of fly ash, 50 parts of furnace slag, 40 parts of bentonite and 25 parts of biomass ash.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3min at the speed of 600-800 rpm/min.
Step four: and pouring the stirred material into a corresponding mold, maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃, and testing the working performance of the material at the age of 28d and 180d respectively.
The TBM tunnel lining back grouting material prepared in the embodiment is subjected to tests on impermeability, porosity and mechanical property of a slurry stone body, and the test results are shown in tables 3-1 and 3-2:
TABLE 3-1 calculus body impermeability of TBM Tunnel Lining Back grouting Material
The result shows that the 28d seepage-resistant pressure is larger, the 28d permeability coefficient is smaller and the 28d porosity is lower because more densifiers are added, more common portland cement is contained in the base material, the hydration degree of the material is higher, and the porosity of the stone-bonded body is less; because the sunflower stalk ash with higher content is added in the system, the sunflower stalk ash can continuously release alkaline substances KOH into pore solution, promote the long-term hydration and continuous densification of the material, and reduce the 180d permeability coefficient of the stone body by 40.6 percent compared with 28 d.
TABLE 3-2 mechanical properties of stone of TBM tunnel lining back grouting material
The result shows that more densifier is added with the ordinary portland cement in the matrix material, so that the hydration degree of the material is higher, the pores of the stone-forming body are less, and the 28d compressive and flexural strength is higher; in addition, as the defoaming agent with higher content is added, the bending pressure of the calculus body under the mixture ratio is higher and is 0.31; because the sunflower stalk ash with higher content is added in the system, the sunflower stalk ash can continuously release an alkaline substance KOH into a pore solution, so that the long-term hydration and continuous densification of the material are promoted, and the 180d compressive strength of the stone body is increased by 23.4 percent compared with 28 d.
Example 4
A TBM tunnel lining back grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the base material by using a planetary ball mill until the fineness is less than 37 mu m, screening by using a screening machine and then carrying out an experiment for later use;
step two: weighing raw materials according to the mass fraction, wherein the raw materials comprise 320 parts of base material, 12 parts of silica fume and nano SiO 2 2 parts of defoaming agent, 2 parts of sunflower stalk ash and 170 parts of water.
The base material comprises the following components in parts by weight: 20 parts of ordinary portland cement, 30 parts of mineral powder, 100 parts of fly ash, 30 parts of furnace slag, 25 parts of bentonite and 30 parts of biomass ash.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3min at the speed of 600-800 rpm/min.
Step four: and pouring the stirred material into a corresponding mold, maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃, and testing the working performance of the material at the age of 28d and 180d respectively.
The TBM tunnel lining back grouting material prepared in the embodiment is subjected to tests on impermeability, porosity and mechanical property of a slurry stone body, and the test results are shown in tables 4-1 and 4-2:
TABLE 4-1 calculus body impermeability of TBM Tunnel Lining Back grouted materials
The results show that the material has high permeation pressure resistance, low permeability coefficient and porosity due to low water-cement ratio, high densifier doping amount and low bentonite doping amount, and the material has high hydration degree and compact internal structure; due to the continuous excitation effect of the sunflower stalk ash, the 180d permeability coefficient of the stone bodies is reduced by 43.6% compared with 28d, which shows that the stone bodies are continuously hydrated and densified in the age of 28d to 180 d.
TABLE 4-2 mechanical properties of stone of TBM tunnel lining back grouting material
The results show that the material has very high compression strength and rupture strength due to the low water cement ratio, high densifier doping amount and low bentonite doping amount; in addition, as a large amount of defoaming agent is added, the compression ratio of the stone-forming body in the proportion is 0.32, and compared with the traditional grouting material, the material has higher compression ratio and higher toughness; due to the continuous excitation effect of the sunflower stalk ash, the 180d compressive strength of the stone bodies is increased by 26.0 percent compared with 28d, which shows that the stone bodies are continuously hydrated in the age of 28d to 180 d.
Example 5
A TBM tunnel lining back grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the base material to the fineness of less than 37 mu m by using a planetary ball mill, screening by using a screening machine, and performing an experiment for later use;
step two: weighing raw materials in parts by mass, wherein the raw materials comprise 320 parts of base material, 16 parts of silica fume and nano SiO 2 4 parts of defoaming agent, 1.5 parts of sunflower stalk ash and 200 parts of water.
The base material comprises the following components in parts by weight: 40 parts of ordinary portland cement, 60 parts of mineral powder, 130 parts of fly ash, 50 parts of furnace slag, 60 parts of bentonite and 25 parts of biomass ash.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3min at the speed of 600-800 rpm/min.
Step four: and pouring the stirred material into a corresponding mold, maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃, and testing the working performance of the material at the age of 28d and 180d respectively.
The TBM tunnel lining back grouting material prepared in the embodiment is subjected to tests on impermeability, porosity and mechanical property of a slurry stone body, and the test results are shown in tables 5-1 and 5-2:
TABLE 5-1 calculus body impermeability of TBM Tunnel Lining Back grouting Material
The result shows that the 28d anti-permeability performance of the material is more excellent due to the high mixing amount of the densifier and the ordinary portland cement; however, the higher water-cement ratio and the bentonite mixing amount cause adverse effects on the hydration degree and the internal structure compactness of the material, so that the anti-permeability performance of the material is reduced; due to the continuous excitation of the sunflower stalk ash with higher content, the 180d permeability coefficient of the stone body is reduced by 34.1 percent compared with 28d, which shows that the stone body is continuously hydrated and densified in the age of 28d to 180 d.
TABLE 5-2 mechanical properties of stone of TBM tunnel lining back grouting material
The result shows that the 28d compressive rupture strength of the material is excellent due to the high mixing amount of the densifier and the ordinary portland cement; however, the higher water-cement ratio and the bentonite mixing amount have adverse effects on the hydration degree and the internal structure compactness of the material, so that the mechanical property of the material is reduced; due to the continuous excitation effect of the high-content sunflower stalk ash, the 180d compressive strength of the stone body is increased by 20.9 percent compared with 28d, which shows that the stone body is continuously hydrated in the age of 28d to 180d and has larger hydration degree.
From examples 1-5, it can be known that 8-12% by mass of the special densifier can significantly improve the anti-permeability pressure and mechanical properties of the material concretion body, and reduce the permeability coefficient and porosity of the concretion body. Silica fume and nano SiO 2 Can form good gradation with a gelling system, and improve the integral compactness of the material; defoamingThe agent can discharge bubbles in a system out of the material, so that the pore content of the material is reduced; the sunflower stalk ash can continuously release alkaline substances KOH into the pore solution, and the hydration of the system is promoted, so that the compressive strength and the permeability coefficient of the material after 28d are improved. The mixing amount of cement, various mineral admixtures, the mixing amount of a special densifier and the water-cement ratio are all important factors influencing the compactness degree and the working performance of the material calculus body. In conclusion, the grouting material disclosed by the invention has better anti-permeability performance and mechanical property, and can be used as a grouting material at the back of a TBM tunnel lining.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A special densifier for TBM tunnel lining back grouting material is characterized by comprising the following components: silica fume, nano SiO 2 Defoaming agent and sunflower stalk ash; wherein, the silica fume and the nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 6-16:2-8:0.5-2:10-30.
2. The special densifier according to claim 1, wherein silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 6;
or, silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 8; or, silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 20;
or, silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 12; or, silica fume, nano SiO 2 The mass ratio of the defoaming agent to the sunflower stalk ash is as follows: 16:4:1.5:20.
3. The specialized densifier according to claim 1, wherein the defoamer is a silicone powder defoamer.
4. The preparation method of the special densifier according to any one of claims 1 to 3, wherein silica fume, nano SiO 2 Mixing the defoaming agent and sunflower stalk ash for 2-3 min.
5. The TBM tunnel lining back grouting material is characterized by comprising the following raw materials in parts by weight: 200-320 parts of base material; 18.5 to 57 portions of special densifier as claimed in any one of claims 1 to 3; 140-200 parts of water;
the base material comprises the following raw materials in parts by weight: 20-40 parts of ordinary portland cement, 30-60 parts of mineral powder, 80-180 parts of fly ash, 30-70 parts of furnace slag, 25-60 parts of bentonite and 20-30 parts of biomass ash.
6. The TBM tunnel lining back grouting material as claimed in claim 5, wherein the mass percentage of silica fume in the densifier in the back grouting material is 1.2% -4%;
or, nano SiO in densifier 2 The mass percentage of the back grouting material is 0.4-1.6%.
7. The TBM tunnel lining back grouting material as claimed in claim 5, wherein the mass percentage of the defoaming agent in the densifier in the back grouting material is 0.1% -0.4%;
or the sunflower stalk ash in the densifier accounts for 2-6% of the back grouting material by mass percent.
8. The TBM tunnel lining back grouting material of claim 5, wherein the TBM tunnel lining back grouting material comprises the following components in parts by weight: 200 parts of base material, 6 parts of silica fume and nano SiO 2 2 parts of defoaming agent, 0.5 part of sunflower stalk ash and 140 parts of water;
or, the TBM tunnel lining back grouting materialThe material comprises the following components in parts by weight: 200 parts of base material, 8 parts of silica fume and nano SiO 2 8 parts of defoaming agent, 2 parts of sunflower stalk ash and 200 parts of water;
or the TBM tunnel lining back grouting material comprises the following components in parts by weight: 260 parts of base material, 20 parts of silica fume and nano SiO 2 6 parts of defoaming agent 1 part, 30 parts of sunflower stalk ash and 170 parts of water;
or the TBM tunnel lining back grouting material comprises the following components in parts by weight: 320 parts of base material, 12 parts of silica fume and nano SiO 2 2 parts of defoaming agent, 2 parts of sunflower stalk ash and 170 parts of water;
or the TBM tunnel lining back grouting material comprises the following components in parts by weight: 320 parts of base material, 16 parts of silica fume and nano SiO 2 4 parts of defoaming agent, 1.5 parts of sunflower stalk ash and 200 parts of water.
9. The preparation method of the TBM tunnel lining back grouting material as claimed in claim 5, characterized by comprising the following steps:
weighing various raw materials according to the weight ratio;
mixing ordinary portland cement, mineral powder, fly ash, furnace slag, bentonite and biomass ash uniformly for 3min at a ratio of 600-800rpm/min to prepare a matrix material;
uniformly mixing the base material, the special densifier and water in proportion at 600-800rpm/min for 3min to prepare the low-carbon anti-permeability grouting material for filling the back of the lining of the TBM tunnel.
10. The TBM tunnel lining back grouting material of claim 5, in impervious filling.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116217173A (en) * | 2023-03-07 | 2023-06-06 | 北京交通大学 | Novel high-performance green grouting water-blocking material, preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120022005A (en) * | 2010-08-25 | 2012-03-09 | (주)두영티앤에스 | Repairing mortar having high wear resistance, high shock resistance and high salt damage prevention and a process for repairing tunnel using the same |
| CN102757206A (en) * | 2012-08-10 | 2012-10-31 | 安徽省煤田地质局第一勘探队 | Mine fracture grouting material and usage method thereof |
| CN108424063A (en) * | 2018-05-31 | 2018-08-21 | 宁波联城住工科技有限公司 | A kind of fly ash-based geopolymer high-strength grout and preparation method thereof |
| CN112759336A (en) * | 2021-02-05 | 2021-05-07 | 山东大学 | Performance optimizing agent, matrix material, solid waste grouting material, and preparation method and application thereof |
| CN113998945A (en) * | 2021-10-26 | 2022-02-01 | 中交第三航务工程局有限公司南京分公司 | Micro-expansion and strong anti-permeability cement-based grouting material and preparation method thereof |
| CN114230224A (en) * | 2021-12-21 | 2022-03-25 | 青岛市地铁六号线有限公司 | Low-carbon anti-permeability type full-solid waste grouting material and preparation method and application thereof |
| CN114573278A (en) * | 2022-03-23 | 2022-06-03 | 北京华阳众信建材有限公司 | Shield grouting material and preparation method thereof |
-
2022
- 2022-10-20 CN CN202211287281.4A patent/CN115626789B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120022005A (en) * | 2010-08-25 | 2012-03-09 | (주)두영티앤에스 | Repairing mortar having high wear resistance, high shock resistance and high salt damage prevention and a process for repairing tunnel using the same |
| CN102757206A (en) * | 2012-08-10 | 2012-10-31 | 安徽省煤田地质局第一勘探队 | Mine fracture grouting material and usage method thereof |
| CN108424063A (en) * | 2018-05-31 | 2018-08-21 | 宁波联城住工科技有限公司 | A kind of fly ash-based geopolymer high-strength grout and preparation method thereof |
| CN112759336A (en) * | 2021-02-05 | 2021-05-07 | 山东大学 | Performance optimizing agent, matrix material, solid waste grouting material, and preparation method and application thereof |
| CN113998945A (en) * | 2021-10-26 | 2022-02-01 | 中交第三航务工程局有限公司南京分公司 | Micro-expansion and strong anti-permeability cement-based grouting material and preparation method thereof |
| CN114230224A (en) * | 2021-12-21 | 2022-03-25 | 青岛市地铁六号线有限公司 | Low-carbon anti-permeability type full-solid waste grouting material and preparation method and application thereof |
| CN114573278A (en) * | 2022-03-23 | 2022-06-03 | 北京华阳众信建材有限公司 | Shield grouting material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王宝民: "《纳米二氧化碳高性能混凝土性能及机理》", 辽宁科学技术出版社, pages: 130 - 131 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116217173A (en) * | 2023-03-07 | 2023-06-06 | 北京交通大学 | Novel high-performance green grouting water-blocking material, preparation method and application thereof |
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