CN114524661B - Tunnel temperature field model test stratum similar material and preparation method thereof - Google Patents
Tunnel temperature field model test stratum similar material and preparation method thereof Download PDFInfo
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- CN114524661B CN114524661B CN202210177215.5A CN202210177215A CN114524661B CN 114524661 B CN114524661 B CN 114524661B CN 202210177215 A CN202210177215 A CN 202210177215A CN 114524661 B CN114524661 B CN 114524661B
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- 239000000463 material Substances 0.000 title claims abstract description 138
- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000004576 sand Substances 0.000 claims abstract description 46
- 239000002689 soil Substances 0.000 claims abstract description 44
- 239000011435 rock Substances 0.000 claims abstract description 36
- 230000002528 anti-freeze Effects 0.000 claims abstract description 34
- 238000002156 mixing Methods 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000007710 freezing Methods 0.000 claims abstract description 21
- 238000003756 stirring Methods 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 238000005303 weighing Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 9
- 230000008014 freezing Effects 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 5
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 3
- 125000003827 glycol group Chemical group 0.000 claims 1
- 238000012546 transfer Methods 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 39
- 239000000203 mixture Substances 0.000 description 13
- 239000000243 solution Substances 0.000 description 8
- 238000011160 research Methods 0.000 description 6
- 239000002253 acid Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 230000000979 retarding effect Effects 0.000 description 4
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 4
- 229920002748 Basalt fiber Polymers 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009746 freeze damage Effects 0.000 description 2
- 239000010438 granite Substances 0.000 description 2
- 235000010288 sodium nitrite Nutrition 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- -1 basalt Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Classifications
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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
- C04B30/00—Compositions for artificial stone, not containing binders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
-
- 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
- C04B2111/00991—Uses not provided for elsewhere in C04B2111/00 for testing
-
- 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
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The application discloses a tunnel temperature field model test stratum similar material and a preparation method thereof, wherein the tunnel temperature field model test stratum similar material comprises the following raw materials in parts by mass: 5 to 7 parts of basalt, 1 to 3 parts of sand, 3 to 5 parts of soil and 0.5 to 1.5 parts of antifreeze. Weighing basalt, sand and soil according to a proportion; mixing the basalt, the sand and the soil uniformly; adding the anti-freezing liquid and fully stirring; putting the mixed materials into a 130-10 mm circular forming die, and tamping and forming; and (4) placing the formed mold into a curing box, curing for 24 hours, and demoulding to obtain the similar material of the surrounding rock for the tunnel temperature field model test. The heat transfer rule that similar materials are the same as actual surrounding rocks can be realized, the heat conductivity coefficient of the similar materials can be changed by changing the material proportion, so that the method is suitable for the thermodynamic properties of the surrounding rocks of different tunnels, and the possibility is provided for simulating the spatial-temporal evolution rule of the temperature field of the tunnel in a real cold region.
Description
Technical Field
The invention relates to the technical field of tunnel model tests in cold regions, in particular to a tunnel temperature field model test stratum similar material and a preparation method thereof.
Background
With the increase of the number of the tunnels in the cold region, the problem of tunnel freeze injury is increasingly serious. In northwest and northeast regions of China, after the tunnel runs through in a cold region, strong heat transfer occurs between air-lining, lining and surrounding rock in the tunnel, so that the structure is cracked, water is leaked, and the drain pipe is blocked by ice. The tunnel can not be used for 8-9 months due to the freezing damage problem of part of tunnels, which has serious negative effect on the transportation of China. Therefore, the research on the evolution rule of the tunnel temperature field in the cold region has important application value for preventing and controlling the freeze injury. The model test is a scientific research method based on a similar theory, a proportional model similar model test is adopted to research the evolution law of the tunnel temperature field, and the experimental result is popularized and applied to the analysis of the actual tunnel engineering temperature field in the cold region, so that some problems of preventing and controlling the freezing injury of the tunnel in the cold region can be effectively solved.
At present, most of surrounding rock materials adopted in model test research of a cold region tunnel temperature field are original tunnel surrounding rocks and concrete materials. However, the original tunnel surrounding rock material has the problems of high remote sampling cost and the porosity of broken rocks is far larger than the actual situation, and the similar concrete material has the defects of single experiment times, no contribution to the reuse of other equipment, low material reuse and the like; therefore, it is necessary to establish a preparation method of the similar material of the tunnel temperature field model test stratum, and further establish a similar material of the surrounding rock which has the advantages of simple quality matching, quick forming, easy material acquisition, low cost and secondary utilization of the mixture.
Chinese patent CN 202011181069.0 discloses a high-strength sulfate corrosion-resistant concrete and a preparation method thereof. Comprises the following components in percentage by mass: 18-22% of Portland cement, 6-10% of modified basalt fiber, 5-8% of silica powder, 15-20% of river sand, 20-25% of granite broken stone, 0.5-1.0% of sodium nitrite antifreezing agent, 1.0-1.5% of polycarboxylic acid retarding water reducing agent and the balance of water. The concrete preparation method is that the polycarboxylic acid retarding water reducer is added into water and stirred to be dissolved to prepare the polycarboxylic acid retarding water reducer aqueous solution; adding portland cement, river sand and granite broken stone into a stirrer, and carrying out dry stirring to obtain a dry stirring material; pouring the polycarboxylic acid retarding and water reducing agent aqueous solution into a dry-mixed material for wet mixing, then adding the modified basalt fiber, the silicon powder and the sodium nitrite, and uniformly stirring to obtain the modified basalt fiber modified concrete. The concrete prepared by the invention has good mechanical property and sulfate corrosion resistance.
Disclosure of Invention
The technical problem to be solved is as follows: the technical problem to be solved by the application is that the existing concrete similar material is single in experiment times, not beneficial to reuse of other equipment, low in material recycling and the like, and the tunnel temperature field model test stratum similar material and the preparation method thereof are provided.
The technical scheme is as follows:
in order to solve the technical problem, the technical scheme adopted by the application is as follows:
a tunnel temperature field model test stratum similar material comprises the following raw materials in parts by mass: 5-7 parts of basalt, 1-3 parts of sand, 3-5 parts of soil and 0.5-1.5 parts of antifreeze, wherein the freezing point of the antifreeze is-40 ℃.
A preparation method of a similar material of a tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: determining the heat conductivity coefficient range of the similar materials of the tunnel temperature field model test stratum according to the actual thermodynamic parameters of the tunnel surrounding rock in the cold region;
the second step: determining the material ratio of basalt, sand, soil and antifreeze liquid through the heat conductivity coefficient range of the similar materials of the tunnel temperature field model test stratum;
the third step: weighing basalt, sand, soil and antifreeze;
the fourth step: the basalt, the sand and the soil are stirred and mixed uniformly, then the antifreeze solution is added, and the mixture is stirred and mixed uniformly;
the fifth step: putting the mixed materials into a forming die, tamping, forming, maintaining for 24 hours, and naturally drying after demolding;
and a sixth step: and (4) measuring the heat conductivity coefficient of the similar material of the tunnel temperature field model test stratum in the fifth step by using a heat conductivity coefficient tester to obtain the heat conductivity coefficient of the similar material of the surrounding rock for the tunnel temperature field model test in the cold region.
As a preferred technical scheme of the invention: the particle size of the basalt is less than 10mm.
As a preferred technical scheme of the invention: the particle size of the sand is less than 2.36mm.
As a preferred technical scheme of the invention: the particle size of the soil is less than 1.16mm.
As a preferred technical scheme of the invention: the anti-freezing liquid is prepared from deionized water and an anti-freezing agent according to the weight ratio of 7:3, and mixing the components in proportion.
As a preferred technical scheme of the invention: the antifreezing agent adopts glycol solution.
As a preferred technical scheme of the invention: the tunnel temperature field model test stratum similar material comprises the following raw materials in parts by weight: 7 parts of basalt, 3 parts of sand, 3 parts of soil and 1.5 parts of antifreeze liquid.
As a preferred technical scheme of the invention: the stirring adopts the model as follows: a KOMAX22MM screw rod (hexagonal handle) multifunctional stirrer, load power 4600, rated frequency 50HZ, rated voltage 220V and rotating speed 400-2000 r/min.
Principle explanation: the concrete is used as a surrounding rock similar material, and is mainly composed of a cold environment, a tunnel lining structure (concrete) and a surrounding rock structure when a cold region tunnel surrounding rock temperature field model test is carried out. The concrete is used as a formula to simulate a surrounding rock structure, and the most intuitive defects are that the concrete is easy to solidify and form and has no repeatability, the material is wasted after the experiment is finished, the secondary utilization cannot be realized, meanwhile, the heat conductivity coefficient range of the concrete structure is relatively fixed, and the requirement of the heat conductivity coefficient of most tunnel surrounding rocks cannot be met by changing the mixture ratio; on the other hand can bury a large amount of sensors of depth in the country rock, when adopting the concrete, the sensor can be destroyed to the pressure that the concrete solidifies, and the similar material of country rock in adopting this application compromises that the mixture quality is simple, the shaping is fast, the material easily obtains, with low costs, but mixture reutilization.
Has the beneficial effects that: compared with the prior art, the tunnel temperature field model test stratum similar material and the preparation method thereof have the following technical effects:
1. according to the tunnel temperature field model test stratum similar material, basalt, soil and sand which are easy to obtain, low in cost and good in heat conductivity coefficient stability are used as raw materials, and the proportion of different surrounding rock heat conductivity coefficients can be realized; the freezing point of the material can be reduced to-40 ℃ by combining with the anti-freezing liquid, so that the heat conductivity coefficient of the similar material in a tunnel temperature field model test in a cold region can be ensured not to be frozen along with the reduction of the temperature, the heat conductivity coefficient of the similar material is changed, and the stability of the heat conductivity coefficient of the similar material is ensured.
2. The tunnel temperature field model test stratum similar material can be used for simulating medium materials of surrounding rocks of tunnel temperature fields in different cold regions, and the problem that the tunnel surrounding rock heat conductivity coefficient similar material is difficult to simulate is solved. The heat conductivity coefficient of the similar material basically covers the heat conductivity coefficient requirement of the existing cold region tunnel surrounding rock, compared with the previous research, the heat conductivity coefficient simulation method has the advantages of truly simulating the cold region tunnel temperature field evolution process, simultaneously considering the advantages of simple material matching, quick forming, easy acquisition of the material, low cost, secondary utilization of the mixture and the like, and the obtained temperature field similar model test research result is more accurate.
3. The method can be used for matching similar materials with different cold region tunnel surrounding rock heat conductivity coefficients to simulate the evolution law of the cold region tunnel temperature field.
4. Compared with the existing concrete material, the cold region tunnel surrounding rock similar material provided by the invention has the advantages of simple material formula, quick forming, easy material acquisition, low cost and secondary utilization of the mixture.
5. The preparation method of the similar material is simple, the thermodynamic property is stable, the similar material is easy to pour, the heat conductivity coefficient of the material can be changed by adjusting the material proportion on the premise of not influencing the overall property, and the possibility is provided for simulating the surrounding rocks with different heat conductivity coefficients.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The particle size of the basalt used in the embodiment of the invention is less than 10mm, the particle size of the sand is less than 2.36mm, the particle size of the soil is less than 1.16mm, the freezing point of the antifreeze solution is-40 ℃, and the antifreeze solution is prepared by mixing deionized water and an antifreeze glycol solution according to the weight ratio of 7:3, and mixing the components in proportion. The stirring adopts the types as follows: a KOMAX22MM screw rod (hexagonal handle) multifunctional stirrer, load power 4600, rated frequency 50HZ, rated voltage 220V and rotating speed 400-2000 r/min.
Example 1
A tunnel temperature field model test stratum similar material comprises the following raw materials in parts by weight: 5 parts of basalt, 1 part of sand, 3 parts of soil and 0.5 part of antifreeze liquid.
A preparation method of a similar material of a tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: weighing 5 parts of basalt, 1 part of sand, 3 parts of soil and 0.5 part of antifreeze according to the mass part ratio;
the second step is that: mixing three materials of basalt, sand and soil and uniformly mixing in a stirrer;
the third step: adding the anti-freezing liquid, and fully stirring;
the fourth step: putting the mixed material into a forming die, and tamping and forming;
the fifth step: curing the formed material for 24 hours, then demoulding, and naturally drying after demoulding;
and a sixth step: and (5) measuring the heat conductivity coefficient of the similar material in the fifth step by using a heat conductivity coefficient tester.
The heat conductivity coefficient of the similar material of the surrounding rock with the mixture ratio is 2.17 W.m -1 ·℃ -1 。
Example 2
A tunnel temperature field model test stratum similar material comprises the following raw materials in parts by mass: 6 parts of basalt, 2 parts of sand, 3 parts of soil and 1 part of antifreeze liquid.
A preparation method of a similar material of a tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: weighing 6 parts of basalt, 2 parts of sand, 3 parts of soil and 1 part of antifreeze according to the mass part ratio;
the second step is that: mixing three materials of basalt, sand and soil and uniformly mixing in a stirrer;
the third step: adding the anti-freezing liquid, and fully stirring;
the fourth step: putting the mixed material into a forming die, and tamping and forming;
the fifth step: curing the formed material for 24 hours, then demoulding, and naturally drying after demoulding;
and a sixth step: and (5) measuring the heat conductivity of the similar material in the fifth step by using a heat conductivity tester.
The heat conductivity coefficient of the surrounding rock similar material with the mixture ratio is 2.70 W.m -1 ·℃ -1 。
Example 3
A tunnel temperature field model test stratum similar material comprises the following raw materials in parts by weight: 7 parts of basalt, 3 parts of sand, 3 parts of soil and 1.5 parts of antifreeze liquid.
A preparation method of a similar material of a tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: weighing 7 parts of basalt, 3 parts of sand, 3 parts of soil and 1.5 parts of antifreeze according to the mass part ratio;
the second step is that: mixing three materials of basalt, sand and soil and uniformly mixing in a stirrer;
the third step: adding the anti-freezing liquid, and fully stirring;
the fourth step: putting the mixed material into a forming die, and tamping and forming;
the fifth step: curing the formed material for 24 hours, then demoulding, and naturally drying after demoulding;
and a sixth step: and (5) measuring the heat conductivity coefficient of the similar material in the fifth step by using a heat conductivity coefficient tester.
The heat conductivity coefficient of the similar material of the surrounding rock with the proportion is 2.02 W.m -1 ·℃ -1 。
Example 4
A tunnel temperature field model test stratum similar material comprises the following raw materials in parts by weight: 6 parts of basalt, 1 part of sand, 4 parts of soil and 1.5 parts of antifreeze liquid.
A preparation method of a similar material of a tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: weighing 6 parts of basalt, 1 part of sand, 4 parts of soil and 1.5 parts of antifreeze according to the mass part ratio;
the second step is that: mixing three materials of basalt, sand and soil and uniformly mixing in a stirrer;
the third step: adding the anti-freezing liquid, and fully stirring;
the fourth step: putting the mixed materials into a forming die, and tamping and forming;
the fifth step: curing the formed material for 24 hours, then demoulding, and naturally drying in air;
and a sixth step: and (5) measuring the heat conductivity coefficient of the similar material in the fifth step by using a heat conductivity coefficient tester.
The heat conductivity coefficient of the surrounding rock similar material with the mixture ratio is 1.93 W.m -1 ·℃ -1 。
Example 5
A tunnel temperature field model test stratum similar material comprises the following raw materials in parts by weight: 7 parts of basalt, 2 parts of sand, 4 parts of soil and 0.5 part of antifreeze liquid.
A preparation method of a similar material of a tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: weighing 7 parts of basalt, 2 parts of sand, 4 parts of soil and 0.5 part of antifreeze according to the mass part ratio;
the second step is that: mixing three materials of basalt, sand and soil and uniformly mixing in a stirrer;
the third step: adding the anti-freezing liquid, and fully stirring;
the fourth step: putting the mixed materials into a forming die, and tamping and forming;
the fifth step: curing the formed material for 24 hours, then demoulding, and naturally drying after demoulding;
and a sixth step: and (5) measuring the heat conductivity coefficient of the similar material in the fifth step by using a heat conductivity coefficient tester.
The similar material of the surrounding rock with the proportionThe thermal conductivity coefficient of the material is 2.66 W.m -1 ·℃ -1 。
Example 6
A tunnel temperature field model test stratum similar material comprises the following raw materials in parts by mass: 5 parts of basalt, 3 parts of sand, 4 parts of soil and 1 part of antifreeze liquid.
A preparation method of a similar material of a tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: weighing 5 parts of basalt, 3 parts of sand, 4 parts of soil and 1 part of antifreeze according to the mass part ratio;
the second step is that: mixing three materials of basalt, sand and soil and uniformly mixing in a stirrer;
the third step: adding the anti-freezing liquid, and fully stirring;
the fourth step: putting the mixed materials into a forming die, and tamping and forming;
the fifth step: curing the formed material for 24 hours, then demoulding, and naturally drying in air;
and a sixth step: and (5) measuring the heat conductivity coefficient of the similar material in the fifth step by using a heat conductivity coefficient tester.
The heat conductivity coefficient of the similar material of the surrounding rock with the mixture ratio is 1.69 W.m -1 ·℃ -1 。
Example 7
A tunnel temperature field model test stratum similar material comprises the following raw materials in parts by weight: 7 parts of basalt, 1 part of sand, 5 parts of soil and 1 part of antifreeze liquid.
A preparation method of a similar material of a tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: weighing 7 parts of basalt, 1 part of sand, 5 parts of soil and 1 part of antifreeze solution according to the mass part ratio;
the second step is that: mixing three materials of basalt, sand and soil and uniformly mixing in a stirrer;
the third step: adding the anti-freezing liquid, and fully stirring;
the fourth step: putting the mixed materials into a forming die, and tamping and forming;
the fifth step: curing the formed material for 24 hours, then demoulding, and naturally drying after demoulding;
and a sixth step: and (5) measuring the heat conductivity coefficient of the similar material in the fifth step by using a heat conductivity coefficient tester.
The heat conductivity coefficient of the similar material of the surrounding rock with the mixture ratio is 2.72 W.m -1 ·℃ -1 。
Example 8
A tunnel temperature field model test stratum similar material comprises the following raw materials in parts by weight: 5 parts of basalt, 2 parts of sand, 5 parts of soil and 1.5 parts of antifreeze liquid.
A preparation method of a similar material of a tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: weighing 5 parts of basalt, 2 parts of sand, 5 parts of soil and 1.5 parts of antifreeze according to the mass part ratio;
the second step is that: mixing three materials of basalt, sand and soil and uniformly mixing in a stirrer;
the third step: adding the anti-freezing liquid, and fully stirring;
the fourth step: putting the mixed materials into a forming die, and tamping and forming;
the fifth step: curing the formed material for 24 hours, then demoulding, and naturally drying after demoulding;
and a sixth step: and (5) measuring the heat conductivity coefficient of the similar material in the fifth step by using a heat conductivity coefficient tester.
The heat conductivity coefficient of the surrounding rock similar material with the proportion is 1.97 W.m -1 ·℃ -1 。
Example 9
A tunnel temperature field model test stratum similar material comprises the following raw materials in parts by mass: 6 parts of basalt, 3 parts of sand, 5 parts of soil and 0.5 part of antifreeze liquid.
A preparation method of a similar material of a tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: weighing 6 parts of basalt, 3 parts of sand, 5 parts of soil and 0.5 part of antifreeze according to the mass part ratio;
the second step is that: mixing three materials of basalt, sand and soil and uniformly mixing in a stirrer;
the third step: adding the anti-freezing solution, and fully stirring;
the fourth step: putting the mixed material into a forming die, and tamping and forming;
the fifth step: curing the formed material for 24 hours, then demoulding, and naturally drying in air;
and a sixth step: and (5) measuring the heat conductivity coefficient of the similar material in the fifth step by using a heat conductivity coefficient tester.
The heat conductivity coefficient of the similar material of the surrounding rock with the mixture ratio is 2.60 W.m -1 ·℃ -1 。
The thermal conductivity coefficients of similar materials of the invention in different proportions are shown in table 1.
TABLE 1
Although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. The preparation method of the similar material of the tunnel temperature field model test stratum is characterized in that the similar material of the tunnel temperature field model test stratum comprises the following raw materials in parts by weight: 5 to 7 parts of basalt, 1 to 3 parts of sand, 3 to 5 parts of soil and 0.5 to 1.5 parts of antifreeze, wherein the freezing point of the antifreeze is-40 ℃; the preparation method of the similar material of the tunnel temperature field model test stratum comprises the following steps:
the first step is as follows: determining the range of the thermal conductivity coefficient of the similar material of the tunnel temperature field model test stratum according to the actual thermodynamic parameters of the tunnel surrounding rock in the cold region;
the second step is that: determining the material ratio of basalt, sand, soil and antifreeze liquid through the heat conductivity coefficient range of the similar materials of the tunnel temperature field model test stratum;
the third step: weighing basalt, sand, soil and antifreeze;
the fourth step: stirring and mixing the basalt, the sand and the soil uniformly, adding the antifreeze solution, and stirring and mixing uniformly;
the fifth step: putting the mixed materials into a forming die, tamping, forming, maintaining for 24 hours, and naturally drying after demolding;
and a sixth step: and (5) measuring the heat conductivity coefficient of the similar material of the tunnel temperature field model test stratum in the fifth step by using a heat conductivity coefficient tester to obtain the heat conductivity coefficient of the similar material of the surrounding rock for the tunnel temperature field model test in the cold region.
2. The method for preparing the similar material of the tunnel temperature field model test stratum according to claim 1, characterized in that: the particle size of the basalt is less than 10mm.
3. The method for preparing the stratum-like material for the tunnel temperature field model test according to claim 1, characterized in that: the particle size of the sand is less than 2.36mm.
4. The method for preparing the stratum-like material for the tunnel temperature field model test according to claim 1, characterized in that: the particle size of the soil is less than 1.16mm.
5. The method for preparing the stratum-like material for the tunnel temperature field model test according to claim 1, characterized in that: the anti-freezing liquid is prepared from deionized water and an anti-freezing agent according to the weight ratio of 7:3, mixing the components in proportion.
6. The method for preparing the stratum similar material for the tunnel temperature field model test according to claim 5, characterized by comprising the following steps: the antifreezing agent is glycol solution.
7. The preparation method of the tunnel temperature field model test stratum similar material according to claim 1, wherein the tunnel temperature field model test stratum similar material comprises the following raw materials in parts by weight: 7 parts of basalt, 3 parts of sand, 3 parts of soil and 1.5 parts of antifreeze liquid.
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| CN103043986A (en) * | 2013-01-25 | 2013-04-17 | 中国科学院武汉岩土力学研究所 | Rock soil similar material and preparation method thereof |
| CN107445567A (en) * | 2016-05-30 | 2017-12-08 | 中国矿业大学(北京) | A kind of analog material for simulating heterogeneous country rock and preparation method thereof |
| CN113860819A (en) * | 2021-10-21 | 2021-12-31 | 交通运输部公路科学研究所 | Sulfate erosion preventing concrete and proportioning optimization method and application |
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| CN103043986A (en) * | 2013-01-25 | 2013-04-17 | 中国科学院武汉岩土力学研究所 | Rock soil similar material and preparation method thereof |
| CN107445567A (en) * | 2016-05-30 | 2017-12-08 | 中国矿业大学(北京) | A kind of analog material for simulating heterogeneous country rock and preparation method thereof |
| CN113860819A (en) * | 2021-10-21 | 2021-12-31 | 交通运输部公路科学研究所 | Sulfate erosion preventing concrete and proportioning optimization method and application |
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| 周期性风温下围岩温度场模拟实验的可行性研究;郭开元等;《煤炭技术》;20160310(第03期);第180-182页 * |
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