CN115872676A - Anti-vibration strong-toughness shield tunnel synchronous grouting material and preparation method thereof - Google Patents
Anti-vibration strong-toughness shield tunnel synchronous grouting material and preparation method thereof Download PDFInfo
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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 discloses a vibration-resistant and toughness-resistant synchronous grouting material for a shield tunnel and a preparation method thereof, and the material comprises 400-500 parts of a base material, 5-22.8 parts of a composite toughening additive and 250-350 parts of water, wherein the base material comprises the following components in parts by weight: 30-50 parts of cement, 40-70 parts of mineral powder, 60-100 parts of steel slag powder, 45-85 parts of rice hull ash, 100-180 parts of fly ash and 70-110 parts of machine-made sand; the composite toughening additive comprises the following components in parts by weight: 0.2-1 part of carbon fiber, 0.4-2 parts of steel fiber, 0.2-0.8 part of polypropylene fiber and 4-20 parts of biomass ash. The grouting material has the characteristics of good anti-vibration performance, excellent mechanical property and high pressure-reducing ratio, is favorable for reducing stone cracks, improves the integral mechanical property, durability and impermeability of the shield tunnel, and realizes safe construction operation of the shield tunnel.
Description
Technical Field
The invention belongs to the technical field of shield tunnel synchronous grouting materials, and mainly relates to a vibration-resistant strong-toughness shield tunnel synchronous grouting material and a preparation method thereof.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
At present, a shield construction method is widely adopted in subway construction, synchronous grouting after tunnel lining is an important part for relieving stratum deformation, ensuring uniform stress of a segment lining and improving the integral impermeability of a tunnel, and the quality of the synchronous grouting mainly depends on the performance of a synchronous grouting material. Most of traditional synchronous grouting materials are cement-based mortar, and the problems of insufficient vibration load resistance, weak mechanical property and non-bending resistance to compression exist, so that a mortar stone body cracks under the repeated vibration of train load; in addition, the brittleness of the synchronous grouting material is high, once the synchronous grouting material deforms under the action of external load, the internal structure is damaged, the residual strength after the synchronous grouting material is damaged is extremely low, the mechanical property and the impermeability of a grout stone body are greatly reduced due to the two reasons, the integral structural strength, the waterproof property and the service life of the tunnel are further influenced, and the effect of synchronous grouting engineering is very small. Therefore, the research and development of the high-toughness vibration-resistant synchronous grouting material has important significance for reducing the cracks of the stone body, improving the mechanical property and durability of the stone body and ensuring the long-term safe construction and operation safety of the tunnel.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a vibration-resistant tough shield tunnel synchronous grouting material and a preparation method thereof. The grouting material has the characteristics of good vibration resistance, excellent mechanical property and high pressure-reduction ratio, is favorable for reducing stone body cracks, improves the integral mechanical property, durability and impermeability of the shield tunnel, and realizes safe construction and operation of the shield tunnel.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the invention provides a synchronous grouting material for an anti-vibration strong-toughness shield tunnel, which comprises 400-500 parts of a base material, 5-22.8 parts of a composite toughening additive and 250-350 parts of water, wherein,
the matrix material comprises the following components in parts by weight: 30-50 parts of cement, 40-70 parts of mineral powder, 60-100 parts of steel slag powder, 45-85 parts of rice hull ash, 100-180 parts of fly ash and 70-110 parts of machine-made sand;
the composite toughening additive comprises the following components in parts by weight: 0.2-1 part of carbon fiber, 0.4-2 parts of steel fiber, 0.2-0.8 part of polypropylene fiber and 4-20 parts of biomass ash.
In a second aspect, the invention provides a preparation method of the anti-vibration strong toughness shield tunnel synchronous grouting material, which comprises the following steps:
uniformly mixing all components of the base material in proportion to obtain a grouting base material;
uniformly mixing all components of the composite toughening additive in proportion to obtain the composite toughening additive;
and uniformly mixing the grouting base material, the composite toughening additive and water in proportion to obtain the grouting material.
The beneficial effects achieved by one or more of the embodiments of the invention described above are as follows:
ordinary portland cement is the most commonly used material in construction engineering and has the advantages of high strength, small drying shrinkage, good wear resistance and excellent durability. The main chemical components of ordinary portland cement are CaO and SiO 2 、Al 2 O 3 And Fe 2 O 3 Can form a compact space network structure by reacting with water, and macroscopically shows excellent mechanicsAnd (4) performance.
The mineral powder is the material with the highest comprehensive utilization value in bulk solid wastes and contains a large amount of active SiO 2 And Al 2 O 3 . Active SiO 2 And Al 2 O 3 Has hydraulicity under the excitation of alkaline substances, and improves the structural strength of a material system. Therefore, the alkaline environment generated by the cement reaction can promote the strength of the mineral powder, and the matching use effect of the alkaline environment and the mineral powder is better.
The steel slag is the main industrial waste slag in the industrial steel making process, the steel slag powder is a material of the steel slag after mechanical grinding and activation, has good activity in the middle and later periods, can be gradually released in an alkaline environment, further improves the effective hydrated mineral content of a material system, reduces the porosity of the material system, and improves the mechanical property and durability of the material.
The rice hull ash is residue left after the combustion of rice hulls or rice husks and is in a loose porous structure, so that the rice hull ash has a large specific surface area and volcanic ash activity. The rice hull ash has certain alkalinity and contains a large amount of SiO 2 Therefore, the silicon source is a reliable alkali source and a silicon source of the grouting material. In addition, the rice hull ash can be uniformly distributed in the gaps of the cementing material, so that the toughness, the impermeability and the durability of the material are improved.
The fly ash is an industrial waste widely applied to the building material industry and contains rich SiO 2 And Al 2 O 3 And the metal oxides can play secondary hydration, filling effect and lubricating effect in the cement-based material, so that the workability and the working performance of the cementing material are improved.
Machine-made sand is sand processed by a sand making machine and other accessory equipment. Due to environmental protection and economic factors, machine-made sand is often used in mortar and concrete industries to replace river sand, and the machine-made sand is preferably used as aggregate in the system.
The traditional shield tunnel synchronous grouting material has the problems of insufficient vibration load resistance, weak mechanical property, non-bending resistance in compression resistance and the like in practical engineering application, and brings potential safety hazards to tunnel engineering. The composite toughening additive of the material of the invention can be very goodTo solve the above problems: the carbon fiber is an inorganic fiber with high strength and high modulus, the tensile strength and the flexural strength of a material system can be obviously enhanced by using the carbon fiber in the cement-based material, however, the tensile strain of the carbon fiber is smaller, and the ductility of the composite material system is not obviously improved by using the carbon fiber alone; the steel fiber is an inorganic fiber with high mechanical strength, high flexibility and usability, can be used in a cement-based material to obviously improve the compressive strength and toughness of a material system, can enable a brittle material to generate a multi-joint cracking behavior, and can absorb more energy under both static load and dynamic load, so that the capacity of the material system for resisting vibration load and impact is improved; the polypropylene fiber is an organic fiber with high flexibility and low hardness, and the toughness and the impact resistance of a material system can be improved by adding the polypropylene fiber into the cement-based material, so that the ductility of the material system is improved; the biomass ash contains rich SiO 2 CaO and Al 2 O 3 The active ingredients in the matrix material can be increased, which in turn increases the compressive and flexural strength of the material system, and in addition, the biomass ash usually exhibits high alkalinity because it contains a high K 2 The content of O can excite mineral powder, steel slag powder, rice hull ash and fly ash in the matrix material, play the potential hydration effect of solid wastes and improve the mechanical property of a material system. In conclusion, the composite toughening additive can improve the mechanical property, toughness and energy absorption characteristic of the grouting material, enhances the toughness of the material under dynamic loads such as vibration load, impact and the like, and realizes safe and efficient filling of the lined wall of the shield tunnel.
The composite toughening admixture endows the matrix material with high toughness and improves the capability of the grouting material for resisting vibration load. The method is favorable for improving the overall mechanical property, durability and impermeability of the shield tunnel and realizing the long-term safe construction and operation of the tunnel.
The operation method is simple, has certain economic advantages compared with the traditional materials, is green and environment-friendly, and is easy to popularize.
The invention utilizes a large amount of solid waste resources with high added value, prepares the solid waste resources into high-performance grouting materials, and is used for filling the subway shield tunnel wall.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of shield synchronous grouting according to an embodiment of the present invention;
fig. 2 is a sectional view of a shield synchronous grouting system according to an embodiment of the present invention.
Wherein, 1, tunnel, 2, shield shell, 3, synchronous grouting material, 4 represent the tunnel section of jurisdiction, 5, synchronous grouting system, 6, stratum.
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.
In a first aspect, the invention provides a synchronous grouting material for an anti-vibration strong-toughness shield tunnel, which comprises 400-500 parts of a base material, 5-22.8 parts of a composite toughening additive and 250-350 parts of water, wherein,
the matrix material comprises the following components in parts by weight: 30-50 parts of cement, 40-70 parts of mineral powder, 60-100 parts of steel slag powder, 45-85 parts of rice hull ash, 100-180 parts of fly ash and 70-110 parts of machine-made sand;
the composite toughening additive comprises the following components in parts by weight: 0.2-1 part of carbon fiber, 0.4-2 parts of steel fiber, 0.2-0.8 part of polypropylene fiber and 4-20 parts of biomass ash.
When the high-toughness synchronous grouting material is actually applied, the long-acting work of a grout stone body can be realized, and the integral mechanical property, durability and impermeability of the shield tunnel are improved.
In some embodiments, the mass ratio of carbon fibers, steel fibers, polypropylene fibers and biomass ash is 0.2.
In some embodiments, the mass percentage of the carbon fibers in the composite toughening additive in the synchronous grouting material is 0.03-0.15%.
Research shows that the carbon fiber is a fiber with high strength and high modulus, and the use of the carbon fiber in the cement-based material can obviously enhance the tensile strength and the flexural strength of the material system and improve the energy absorption of the material. And the too high content of carbon fiber can cause the porosity of the cementing material to be obviously increased, thereby causing the great reduction of the impermeability and compressive strength of the material. Combining the research conditions at home and abroad and the early test results, the mass percentage of the carbon fiber in the composite toughening additive in the synchronous grouting material is more reasonable from 0.03 to 0.15 percent.
In some embodiments, the mass percentage of the steel fibers in the composite toughening additive in the synchronous grouting material is 0.06% -0.3%.
Steel fiber is a fiber with high mechanical strength, high flexibility and usability, which can significantly improve the compressive strength and toughness of the material system when used in cement-based materials. Meanwhile, the steel fiber can enable the brittle material to generate multi-joint cracking behavior, and can absorb more energy under both static load and dynamic load, so that the capability of resisting vibration load and impact of a material system is improved. However, if the content of the steel fiber is too high, the number of pores of the cement material is greatly increased, resulting in dual reduction of mechanical properties and durability. Combining the research conditions at home and abroad and the early test results, the mass percentage of the steel fibers in the composite toughening additive in the synchronous grouting material is more reasonable and is 0.06% -0.3%.
In some embodiments, the polypropylene fiber in the composite toughening additive accounts for 0.03 to 0.15 percent of the mass of the synchronous grouting material.
The polypropylene fiber is an organic fiber with high flexibility and low hardness, and the addition of the polypropylene fiber in the cement-based material can improve the toughness and impact resistance of the material system and improve the ductility of the material system. The polypropylene fiber has a low elastic modulus and is often used in combination with high stiffness fibers. Combining the research conditions at home and abroad and the early test results, the mass percentage of the polypropylene fiber in the composite toughening additive in the synchronous grouting material is more reasonable and is 0.03-0.15%.
In some embodiments, the mass percentage of the biomass ash in the composite toughening additive in the synchronous grouting material is 0.6-3%.
The biomass ash contains abundant oxides including SiO 2 CaO and Al 2 O 3 Can increase active ingredients in the matrix material, further improve the mechanical property and durability of the material system, and in addition, the biomass ash usually shows high alkalinity because the biomass ash contains high K 2 The content of O can excite mineral powder, steel slag powder, rice hull ash and fly ash in the matrix material, play the potential hydration effect of solid wastes and improve the performance of a material system. The addition of the biomass ash enables hydration products such as C-A-S-H, C- (K) -A-S-H and the like to be generated in se:Sub>A material system, and has se:Sub>A positive effect on improving the toughness of the material. According to the early-stage test result, the mass percentage of the biomass ash in the composite toughening additive in the synchronous grouting material is reasonable from 0.6% to 3%.
In some embodiments, the anti-vibration strong-toughness shield tunnel synchronous grouting material comprises the following components in parts by weight: 500 parts of matrix material, 0.2 part of carbon fiber, 0.4 part of steel fiber, 0.4 part of polypropylene fiber, 4 parts of biomass ash and 350 parts of water;
or, comprises the following components: 400 parts of a base material, 0.4 part of carbon fiber, 0.8 part of steel fiber, 0.2 part of polypropylene fiber, 8 parts of biomass ash and 300 parts of water;
or, comprises the following components: 450 parts of matrix material, 0.8 part of carbon fiber, 1.2 parts of steel fiber, 0.6 part of polypropylene fiber, 16 parts of biomass ash and 250 parts of water;
or, comprises the following components: 500 parts of matrix material, 0.4 part of carbon fiber, 2 parts of steel fiber, 0.4 part of polypropylene fiber, 20 parts of biomass ash and 300 parts of water;
or, comprises the following components: 400 parts of a base material, 1 part of carbon fiber, 1.6 parts of steel fiber, 1 part of polypropylene fiber, 8 parts of biomass ash and 350 parts of water;
or, comprises the following components: 450 parts of matrix material, 0.6 part of carbon fiber, 1 part of steel fiber, 0.8 part of polypropylene fiber, 14 parts of biomass ash and 250 parts of water.
Preferably, in the synchronous grouting material, the particle size of the powder is less than 37 microns, the particle size of the machine-made sand is 0.15-2.36mm, and the average length of the fiber is 3mm.
In a second aspect, the invention provides a preparation method of the anti-vibration strong toughness shield tunnel synchronous grouting material, which comprises the following steps:
uniformly mixing all components of the base material in proportion to obtain a grouting base material;
uniformly mixing all components of the composite toughening additive in proportion to obtain the composite toughening additive;
and uniformly mixing the grouting base material, the composite toughening additive and water in proportion to obtain the grouting material.
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, carbon fibers were purchased from Shanghai Shuo composite technologies, inc.
Steel fibers were purchased from tai an sonze composites, inc.
Polypropylene fibers were purchased from newcastle force engineering materials, inc.
Biomass ash was purchased from zheng, han, he.
Example 1
A vibration-resistant tough shield tunnel synchronous grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the powder 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 mass fraction, wherein the raw materials comprise 500 parts of base material, 0.2 part of carbon fiber, 0.4 part of steel fiber, 0.4 part of polypropylene fiber, 4 parts of biomass ash and 350 parts of water.
The base material comprises the following components in parts by weight: 30 parts of ordinary portland cement, 70 parts of mineral powder, 80 parts of steel slag powder, 85 parts of rice husk ash, 140 parts of fly ash and 90 parts of machine-made sand.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3-5 minutes at 600-800 rpm/min.
Step four: and pouring the stirred materials into a corresponding mold, and maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃ for 28 days.
The anti-vibration and high-toughness synchronous grouting material for the shield tunnel prepared in this embodiment is subjected to compressive strength and flexural strength tests, the toughness index of the material is analyzed, and the compressive strength of the material after being circularly vibrated for 2000 times is tested by a mechanical vibrator, as shown in table 1:
TABLE 1 Properties of anti-vibration strong toughness shield tunnel synchronous grouting material
Example 2
A vibration-resistant tough shield tunnel synchronous grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the powder 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 mass fraction, wherein the raw materials comprise 400 parts of base material, 0.4 part of carbon fiber, 0.8 part of steel fiber, 0.2 part of polypropylene fiber, 8 parts of biomass ash and 300 parts of water.
The base material comprises the following components in parts by weight: 50 parts of ordinary portland cement, 55 parts of mineral powder, 100 parts of steel slag powder, 65 parts of rice husk ash, 180 parts of fly ash and 70 parts of machine-made sand.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3-5 minutes at 600-800 rpm/min.
Step four: and pouring the stirred material into a corresponding mold, and maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃ for 28 days.
The anti-vibration strong toughness shield tunnel synchronous grouting material prepared in the embodiment is subjected to compression strength and bending strength tests, the toughness index of the material is analyzed, and the compression strength of the material after 2000 times of cyclic vibration is tested by a mechanical vibrator, as shown in table 2:
TABLE 2 product performance of anti-vibration strong toughness shield tunnel synchronous grouting material
Example 3
A vibration-resistant tough shield tunnel synchronous grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the powder 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 mass fraction, wherein the raw materials comprise 450 parts of matrix material, 0.8 part of carbon fiber, 1.2 parts of steel fiber, 0.6 part of polypropylene fiber, 16 parts of biomass ash and 250 parts of water.
The base material comprises the following components in parts by weight: 40 parts of ordinary portland cement, 40 parts of mineral powder, 80 parts of steel slag powder, 85 parts of rice hull ash, 100 parts of fly ash and 110 parts of machine-made sand.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3-5 minutes at 600-800 rpm/min.
Step four: and pouring the stirred material into a corresponding mold, and maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃ for 28 days.
The anti-vibration strong toughness shield tunnel synchronous grouting material prepared in the embodiment is subjected to compression strength and bending strength tests, the toughness index of the material is analyzed, and the compression strength of the material after 2000 times of cyclic vibration is tested by a mechanical vibrator, as shown in table 3:
TABLE 3 Properties of anti-vibration strong toughness shield tunnel synchronous grouting material
Example 4
A vibration-resistant tough shield tunnel synchronous grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the powder 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 mass fraction, wherein the raw materials comprise 500 parts of base material, 0.4 part of carbon fiber, 2 parts of steel fiber, 0.4 part of polypropylene fiber, 20 parts of biomass ash and 300 parts of water.
The base material comprises the following components in parts by weight: 50 parts of ordinary portland cement, 40 parts of mineral powder, 60 parts of steel slag powder, 45 parts of rice hull ash, 140 parts of fly ash and 70 parts of machine-made sand.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3-5 minutes at 600-800 rpm/min.
Step four: and pouring the stirred materials into a corresponding mold, and maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃ for 28 days.
The anti-vibration strong toughness shield tunnel synchronous grouting material prepared in the embodiment is subjected to compression strength and bending strength tests, the toughness index of the material is analyzed, and the compression strength of the material after 2000 times of cyclic vibration is tested by a mechanical vibrator, as shown in table 4:
TABLE 4 Properties of anti-vibration strong toughness shield tunnel synchronous grouting material
Example 5
A vibration-resistant tough shield tunnel synchronous grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the powder 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 mass fraction, wherein the raw materials comprise 400 parts of base material, 1 part of carbon fiber, 1.6 parts of steel fiber, 1 part of polypropylene fiber, 8 parts of biomass ash and 350 parts of water.
The base material comprises the following components in parts by weight: 30 parts of ordinary portland cement, 55 parts of mineral powder, 100 parts of steel slag powder, 65 parts of rice husk ash, 180 parts of fly ash and 110 parts of machine-made sand.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3-5 minutes at 600-800 rpm/min.
Step four: and pouring the stirred materials into a corresponding mold, and maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃ for 28 days.
The anti-vibration strong toughness shield tunnel synchronous grouting material prepared in the embodiment is subjected to compression strength and bending strength tests, the toughness index of the material is analyzed, and the compression strength of the material after 2000 times of cyclic vibration is tested by a mechanical vibrator, as shown in table 5:
TABLE 5 Properties of anti-vibration strong toughness shield tunnel synchronous grouting material
Example 6
A vibration-resistant tough shield tunnel synchronous grouting material and a preparation method thereof comprise the following steps:
the method comprises the following steps: grinding the powder 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 mass fraction, wherein the raw materials comprise 450 parts of matrix material, 0.6 part of carbon fiber, 1 part of steel fiber, 0.8 part of polypropylene fiber, 14 parts of biomass ash and 250 parts of water.
The base material comprises the following components in parts by weight: 40 parts of ordinary portland cement, 70 parts of mineral powder, 60 parts of steel slag powder, 45 parts of rice hull ash, 100 parts of fly ash and 90 parts of machine-made sand.
Step three: the weighed raw materials are placed in a stirrer to be fully stirred for 3-5 minutes at 600-800 rpm/min.
Step four: and pouring the stirred materials into a corresponding mold, and maintaining the mold in an environment with the humidity of 90% and the temperature of 25 ℃ for 28 days.
The anti-vibration strong toughness shield tunnel synchronous grouting material prepared in the embodiment is subjected to compression strength and bending strength tests, the toughness index of the material is analyzed, and the compression strength of the material after 2000 times of cyclic vibration is tested by a mechanical vibrator, as shown in table 6:
TABLE 6 product performance of anti-vibration strong toughness shield tunnel synchronous grouting material
From examples 1-6, it can be seen that the amount of cement, the amount of each mineral admixture, the amount of the composite toughening admixture and the water-cement ratio are all important factors affecting the compressive strength of the stone body of the material. The composite toughening additive with the mass percentage of 0.6-3% can obviously improve the compression ratio and the toughness index of the stone body of the material and improve the capability of the stone body to resist vibration load. In conclusion, the grouting material disclosed by the invention has better mechanical properties and toughness, and the strength reduction rate is less than 5% under the action of multiple cyclic vibration loads, so that the grouting material can be used as a synchronous grouting material for a shield tunnel.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a synchronous slip casting material of strong toughness shield tunnel of anti-vibration which characterized in that: comprises 400 to 500 portions of base material, 5 to 22.8 portions of composite toughening additive and 250 to 350 portions of water, wherein,
the matrix material comprises the following components in parts by weight: 30-50 parts of cement, 40-70 parts of mineral powder, 60-100 parts of steel slag powder, 45-85 parts of rice hull ash, 100-180 parts of fly ash and 70-110 parts of machine-made sand;
the composite toughening additive comprises the following components in parts by weight: 0.2-1 part of carbon fiber, 0.4-2 parts of steel fiber, 0.2-0.8 part of polypropylene fiber and 4-20 parts of biomass ash.
2. The anti-vibration strong toughness shield tunnel synchronous grouting material according to claim 1, characterized in that: in the composite toughening admixture, the mass ratio of carbon fibers, steel fibers, polypropylene fibers and biomass ash is 0.2.
3. The anti-vibration strong toughness shield tunnel synchronous grouting material according to claim 1, characterized in that: the mass percentage of the carbon fiber in the composite toughening additive in the synchronous grouting material is 0.03-0.15%.
4. The anti-vibration strong toughness shield tunnel synchronous grouting material as claimed in claim 1, wherein: the mass percentage of the steel fiber in the composite toughening additive in the synchronous grouting material is 0.06-0.3%.
5. The anti-vibration strong toughness shield tunnel synchronous grouting material according to claim 1, characterized in that: the mass percentage of the polypropylene fiber in the composite toughening additive in the synchronous grouting material is 0.03-0.15%.
6. The anti-vibration strong toughness shield tunnel synchronous grouting material according to claim 1, characterized in that: the mass percentage of the biomass ash in the composite toughening additive in the synchronous grouting material is 0.6-3%.
7. The anti-vibration strong toughness shield tunnel synchronous grouting material according to claim 1, characterized in that: the anti-vibration strong-toughness shield tunnel synchronous grouting material comprises the following components in parts by weight: 500 parts of a base material, 0.2 part of carbon fiber, 0.4 part of steel fiber, 0.4 part of polypropylene fiber, 4 parts of biomass ash and 350 parts of water;
or, comprises the following components: 400 parts of a base material, 0.4 part of carbon fiber, 0.8 part of steel fiber, 0.2 part of polypropylene fiber, 8 parts of biomass ash and 300 parts of water;
or, comprises the following components: 450 parts of matrix material, 0.8 part of carbon fiber, 1.2 parts of steel fiber, 0.6 part of polypropylene fiber, 16 parts of biomass ash and 250 parts of water;
or, comprises the following components: 500 parts of a base material, 0.4 part of carbon fiber, 2 parts of steel fiber, 0.4 part of polypropylene fiber, 20 parts of biomass ash and 300 parts of water;
or, comprises the following components: 400 parts of a base material, 1 part of carbon fiber, 1.6 parts of steel fiber, 1 part of polypropylene fiber, 8 parts of biomass ash and 350 parts of water;
or, comprises the following components: 450 parts of matrix material, 0.6 part of carbon fiber, 1 part of steel fiber, 0.8 part of polypropylene fiber, 14 parts of biomass ash and 250 parts of water.
8. The anti-vibration strong toughness shield tunnel synchronous grouting material according to any one of claims 1-7, characterized in that: in the synchronous grouting material, the particle size of the powder is less than 37 mu m, the particle size of the machine-made sand is 0.15-2.36mm, and the average length of the fiber is 3mm.
9. The preparation method of the anti-vibration strong toughness shield tunnel synchronous grouting material of any one of claims 1 to 8, which is characterized by comprising the following steps: the method comprises the following steps:
uniformly mixing all components of the matrix material according to a proportion to obtain a grouting matrix material;
uniformly mixing all components of the composite toughening additive in proportion to obtain the composite toughening additive;
and uniformly mixing the grouting base material, the composite toughening additive and water in proportion to obtain the grouting material.
10. The preparation method of the anti-vibration strong toughness shield tunnel synchronous grouting material according to claim 9, characterized by comprising the following steps: the components of the matrix material are proportioned according to the proportion and are uniformly mixed for 2 minutes at 600-800 rpm/min; uniformly mixing the base material, the composite toughening additive and water according to the proportion at 600-800rpm/min for 3-5 minutes to obtain the grouting material.
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN109503089A (en) * | 2019-01-07 | 2019-03-22 | 中铁十四局集团大盾构工程有限公司 | A kind of anti-water dispersion pulp liquid and preparation method thereof for shield synchronization slip casting |
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