CN115112858B - Test method for accelerating soil consolidation settlement through magnetic field - Google Patents
Test method for accelerating soil consolidation settlement through magnetic field Download PDFInfo
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- CN115112858B CN115112858B CN202210503611.2A CN202210503611A CN115112858B CN 115112858 B CN115112858 B CN 115112858B CN 202210503611 A CN202210503611 A CN 202210503611A CN 115112858 B CN115112858 B CN 115112858B
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- 239000002689 soil Substances 0.000 title claims abstract description 119
- 238000007596 consolidation process Methods 0.000 title claims abstract description 29
- 238000010998 test method Methods 0.000 title claims abstract description 13
- 238000012669 compression test Methods 0.000 claims abstract description 91
- 239000002184 metal Substances 0.000 claims abstract description 82
- 229910052751 metal Inorganic materials 0.000 claims abstract description 82
- 238000012360 testing method Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0236—Other environments
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Abstract
The invention relates to a test method for accelerating soil consolidation settlement through a magnetic field, which comprises the following steps: s1, burying a metal wire in a soil body to be subjected to a compression test in a spiral mode, enabling joints at two ends of the metal wire to be left outside the soil body to be subjected to the compression test, and enabling parts of the metal wire except the joints at the two ends to form a spiral coil in the soil body to be subjected to the compression test; s2, placing the soil body to be subjected to the compression test, in which the metal wire is buried, in a magnetic field; and S3, connecting the connectors at the two ends of the metal wire, which are left outside the soil body to be subjected to the compression test, with a direct current power supply, and switching on a direct current power supply switch to carry out a consolidation test on the soil body to be subjected to the compression test so as to obtain a test result.
Description
Technical Field
The invention relates to the technical field of geotechnical model tests, in particular to a test method for accelerating soil consolidation settlement through a magnetic field.
Background
In geotechnical engineering, stress caused by self weight of soil body is dominant, mechanical properties of soil change along with the change of stress, and conventional small-size model test can not reproduce the properties of prototype because stress caused by self weight of soil body is far smaller than that of prototype. One way to solve this problem is to increase the dead weight of the model to make it equivalent to the prototype. At present, a centrifugal test is generally adopted to carry out a small-size geotechnical test. However, the centrifugal test is costly, complicated, and has geographical limitations.
Disclosure of Invention
First, the technical problem to be solved
In view of the defects and shortcomings of the prior art, the invention provides a test method for accelerating soil consolidation settlement through a magnetic field, which solves the technical problem of high cost of using the existing centrifugal test.
(II) technical scheme
In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps:
the embodiment of the invention provides a test method for accelerating soil consolidation settlement through a magnetic field, which comprises the following steps:
s1, burying a metal wire in a soil body to be subjected to a compression test in a spiral mode, enabling joints at two ends of the metal wire to be left outside the soil body to be subjected to the compression test, and enabling parts of the metal wire except the joints at the two ends to form a spiral coil in the soil body to be subjected to the compression test;
S2, placing the soil body to be subjected to the compression test, in which the metal wire is buried, in a magnetic field;
and S3, connecting the connectors at the two ends of the metal wire, which are left outside the soil body to be subjected to the compression test, with a direct current power supply, and switching on a direct current power supply switch to carry out a consolidation test on the soil body to be subjected to the compression test so as to obtain a test result.
Preferably, the method comprises the steps of,
In S1, specifically, the metal wire is uniformly buried in the soil body to be subjected to the compression test in a spiral manner in a clockwise direction, so that the joints at both ends of the metal wire remain outside the soil body to be subjected to the compression test, and the parts of the metal wire except the joints at both ends form a spiral coil in the soil body to be subjected to the compression test.
Preferably, the method comprises the steps of,
The metal wire is an iron wire.
Preferably, the method comprises the steps of,
The spiral coil formed by the joint parts except the two ends of the metal wire in the soil body to be subjected to the compression test is provided with a plurality of turns of coils;
wherein, any two adjacent turns of coils have a preset distance.
Preferably, the S2 specifically includes:
and placing a first fixed magnet on the top of the soil body to be subjected to the compression test, which is buried with the metal wire, so that the soil body to be subjected to the compression test, which is buried with the metal wire, is positioned in a first magnetic field generated by the first fixed magnet placed on the top of the soil layer.
Preferably, the S2 specifically includes:
placing a second fixed magnet on the top of the soil body to be subjected to the compression test, which is buried with the metal wire, so that the soil body to be subjected to the compression test, which is buried with the metal wire, is positioned in a second magnetic field generated by the second fixed magnet placed on the top of the soil layer;
and placing a third fixed magnet at the bottom of the soil body to be subjected to the compression test, which is buried with the metal wire, so that the soil body to be subjected to the compression test, which is buried with the metal wire, is positioned in a third magnetic field generated by the third fixed magnet placed at the bottom of the soil layer.
Preferably, the method comprises the steps of,
The second fixed magnet and the third fixed magnet are integrated.
Preferably, the method comprises the steps of,
The step S3 specifically comprises the following steps:
Respectively connecting the connectors at two ends of the metal wire into the positive electrode and the negative electrode of a direct current power supply according to a first preset rule, switching on a direct current power supply switch, and carrying out a consolidation test on the soil body to be subjected to the compression test to obtain a test result;
The first preset rule is as follows:
After the direct-current power switch is turned on, the magnetic field generated by the top of the spiral coil formed by the joint parts except the two ends of the metal wire in the soil body to be subjected to the compression test is repelled from the first magnetic field.
Preferably, the method comprises the steps of,
The step S3 specifically comprises the following steps:
respectively connecting the connectors at the two ends of the metal wire into the positive electrode and the negative electrode of a direct current power supply according to a second preset rule, switching on a direct current power supply switch, and carrying out a consolidation test on the soil body to be subjected to the compression test to obtain a test result;
the second preset rule is as follows:
After the direct current power switch is turned on, the magnetic field generated by the joint parts of the metal wire except the two ends forms the top of the spiral coil in the soil body to be subjected to the compression test is repelled with the second magnetic field, and the magnetic field generated by the joint parts of the metal wire except the two ends forms the bottom of the spiral coil in the soil body to be subjected to the compression test is repelled with the third magnetic field.
Preferably, the method comprises the steps of,
The test results include: and the consolidation coefficient and the compression modulus of the soil body to be subjected to the compression test.
(III) beneficial effects
The beneficial effects of the invention are as follows: according to the test method for accelerating soil consolidation settlement through the magnetic field, the metal wire is buried in the soil to be subjected to the compression test in a spiral mode, so that the joints at the two ends of the metal wire are left outside the soil to be subjected to the compression test, and the parts of the metal wire except the joints at the two ends form a spiral coil in the soil to be subjected to the compression test; then, placing the soil body to be subjected to the compression test, in which the metal wire is buried, in a magnetic field; finally, connecting the two ends of the metal wire outside the soil body to be subjected to the compression test to be connected with a direct current power supply, and switching on a direct current power supply switch to carry out a consolidation test on the soil body to be subjected to the compression test to obtain test results.
Drawings
FIG. 1 is a flow chart of a test method for accelerating soil consolidation settlement by a magnetic field;
FIG. 2 is a schematic structural diagram of a test method for accelerating soil consolidation settlement by a magnetic field in an embodiment of the invention;
Fig. 3 is another schematic structural diagram of a test method for accelerating soil consolidation settlement by a magnetic field according to the embodiment of the invention.
[ Reference numerals description ]
1: A first fixed magnet;
2: soil body to be subjected to compression test;
3: a metal wire;
4: a joint;
5: u-shaped magnet.
Detailed Description
The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.
In order that the above-described aspects may be better understood, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Referring to fig. 1 and 2, the embodiment provides a test method for accelerating soil consolidation settlement by a magnetic field, which includes:
S1, burying a metal wire 3 in a soil body 2 to be subjected to a compression test in a spiral mode, enabling joints 4 at two ends of the metal wire 3 to be left outside the soil body 2 to be subjected to the compression test, and enabling parts of the metal wire 3 except for the joints 4 at two ends to form spiral coils in the soil body 2 to be subjected to the compression test.
S2, placing the soil body 2 to be subjected to the compression test, in which the metal wire 3 is buried, in a magnetic field.
And S3, connecting the connectors at the two ends of the metal wire 3, which are left outside the soil body 2 to be subjected to the compression test, with a direct current power supply, and switching on a direct current power supply switch to carry out the consolidation test on the soil body 2 to be subjected to the compression test so as to obtain a test result.
In practical application of the present embodiment, in S1, specifically, the metal wire 3 is uniformly buried in the clockwise direction in the soil body 2 to be subjected to the compression test in a spiral form, the two end joints 4 of the metal wire 3 are left outside the soil body 2 to be subjected to the compression test, and the metal wire 3 forms a spiral coil in the soil body 2 to be subjected to the compression test except for the part of the two end joints 4.
In a practical application of this embodiment, the metal wire 3 is an iron wire.
In the practical application of the embodiment, the spiral coil formed by the metal wire 3 except the joint 4 parts at the two ends in the soil body 2 to be subjected to the compression test is provided with a plurality of turns.
Wherein, any two adjacent turns of coils have a preset distance. That is, the spiral coil formed in the soil body 2 to be subjected to the compression test except for the joint 4 portions at both ends of the metal wire 3 has a predetermined degree of density.
The method of this embodiment is to embed a metal wire 3 (the metal wire 3 has a certain tensile capability, and will not break when the soil is deformed) in a spiral form in a soil body 2 to be subjected to a compression test, the embedding position and embedding density are set according to the test requirement, then a fixed magnet is placed on top of the soil body 2 to be subjected to the compression test, the metal wire 3 is electrified with direct current, a large number of spiral coils will exhibit a certain magnetism according to the effect of current magnetic field, and the soil body 2 to be subjected to the compression test will be subjected to the repulsive force of the fixed magnetic poles according to the principle of homopolar repulsion, so that the compression speed will be increased correspondingly.
Referring to fig. 2, in practical application of the present embodiment, S2 specifically includes:
As shown in fig. 2, a first fixed magnet 1 is placed on top of the soil body 2 to be subjected to the compression test, in which the metal wire 3 is buried, so that the soil body 2 to be subjected to the compression test is placed in a first magnetic field generated by the first fixed magnet 1 placed on top of the soil layer.
Referring to fig. 3, in practical application of the present embodiment, S2 specifically includes:
and placing a second fixed magnet on the top of the soil body 2 to be subjected to the compression test, which is buried with the metal wire 3, so that the soil body 2 to be subjected to the compression test, which is buried with the metal wire 3, is positioned in a second magnetic field generated by the second fixed magnet placed on the top of the soil layer.
And placing a third fixed magnet at the bottom of the soil body 2 to be subjected to the compression test, which is buried with the metal wire 3, so that the soil body 2 to be subjected to the compression test, which is buried with the metal wire 3, is positioned in a third magnetic field generated by the third fixed magnet placed at the bottom of the soil layer.
Referring to fig. 3, in practical application of the present embodiment, the second fixed magnet and the third fixed magnet are integrated magnets. Specifically, the magnet that the second fixed magnet and the third fixed magnet are integrated is a U-shaped magnet 5.
In practical application of this embodiment, the step S3 specifically includes:
Respectively connecting the connectors 4 at the two ends of the metal wire 3 into the positive electrode and the negative electrode of a direct current power supply according to a first preset rule, switching on a direct current power supply switch, and carrying out a consolidation test on the soil body 2 to be subjected to the compression test to obtain a test result;
The first preset rule is as follows:
After the direct current power switch is turned on, the magnetic field generated by the top of the spiral coil formed by the metal wire 3 except the joints 4 at the two ends in the soil body 2 to be subjected to the compression test is repelled from the first magnetic field.
In practical application of this embodiment, the step S3 specifically includes:
And respectively connecting the connectors 4 at the two ends of the metal wire 3 into the positive electrode and the negative electrode of the direct current power supply according to a second preset rule, switching on a direct current power supply switch, and carrying out a consolidation test on the soil body 2 to be subjected to the compression test to obtain a test result.
The second preset rule is as follows:
After the direct current power switch is turned on, the magnetic field generated by the metal wire 3 except the joint 4 at the two ends forms the top of the spiral coil in the soil body 2 to be subjected to the compression test is repelled with the second magnetic field, and the magnetic field generated by the metal wire 3 except the joint 4 at the two ends forms the bottom of the spiral coil in the soil body 2 to be subjected to the compression test is repelled with the third magnetic field.
In a practical application of this embodiment, the test result includes: the consolidation coefficient and compression modulus of the soil body 2 to be subjected to the compression test.
Under the acceleration of electromagnetic force action, the soil body 2 to be subjected to the compression test realizes the similarity of stress and in-situ of the soil body, so that the stress condition of the site soil body is simulated more truly and accurately, and finally test results consistent with the site test, such as consolidation coefficient, compression modulus and the like, are obtained.
In the test method for accelerating the consolidation and settlement of the soil body through the magnetic field in the embodiment, the metal wire 3 is buried in the soil body 2 to be subjected to the compression test in a spiral mode, so that the joints 4 at the two ends of the metal wire 3 are left outside the soil body 2 to be subjected to the compression test, and the parts of the metal wire 3 except the joints 4 at the two ends form spiral coils in the soil body 2 to be subjected to the compression test; then, placing the soil body to be subjected to the compression test, in which the metal wire is buried, in a magnetic field; finally, the metal wire 3 is left at the two ends of the soil body 2 to be subjected to the compression test, the two ends of the soil body 2 to be subjected to the compression test are connected with a direct current power supply, a direct current power supply switch is turned on, the soil body 2 to be subjected to the compression test is subjected to the consolidation test, and test results are obtained. The device is simple in composition and easy to realize, and the test cost is greatly saved. Moreover, the requirement of the test object is low, and the one-time test time is short.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.
In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the invention.
Claims (6)
1. The test method for accelerating soil consolidation settlement through a magnetic field is characterized by comprising the following steps of:
s1, burying a metal wire in a soil body to be subjected to a compression test in a spiral mode, enabling joints at two ends of the metal wire to be left outside the soil body to be subjected to the compression test, and enabling parts of the metal wire except the joints at the two ends to form a spiral coil in the soil body to be subjected to the compression test;
In S1, a metal wire is buried in a soil body to be subjected to a compression test in a clockwise uniform spiral manner, so that joints at two ends of the metal wire are left outside the soil body to be subjected to the compression test, and a spiral coil is formed in the soil body to be subjected to the compression test except for the joints at the two ends of the metal wire;
the spiral coil formed by the joint parts except the two ends of the metal wire in the soil body to be subjected to the compression test is provided with a plurality of turns of coils;
wherein, a preset distance is reserved between any two adjacent turns of coils;
S2, placing the soil body to be subjected to the compression test, in which the metal wire is buried, in a magnetic field;
s3, connecting the connectors at the two ends of the metal wire, which are left outside the soil body to be subjected to the compression test, with a direct current power supply, and switching on a direct current power supply switch to carry out a consolidation test on the soil body to be subjected to the compression test so as to obtain a test result;
The step S2 specifically comprises the following steps:
Placing a first fixed magnet on the top of the soil body to be subjected to the compression test, which is buried with the metal wire, so that the soil body to be subjected to the compression test, which is buried with the metal wire, is positioned in a first magnetic field generated by the first fixed magnet placed on the top of the soil layer;
or, the S2 specifically includes:
placing a second fixed magnet on the top of the soil body to be subjected to the compression test, which is buried with the metal wire, so that the soil body to be subjected to the compression test, which is buried with the metal wire, is positioned in a second magnetic field generated by the second fixed magnet placed on the top of the soil layer;
and placing a third fixed magnet at the bottom of the soil body to be subjected to the compression test, which is buried with the metal wire, so that the soil body to be subjected to the compression test, which is buried with the metal wire, is positioned in a third magnetic field generated by the third fixed magnet placed at the bottom of the soil layer.
2. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The metal wire is an iron wire.
3. The method of claim 2, wherein the step of determining the position of the substrate comprises,
The second fixed magnet and the third fixed magnet are integrated.
4. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The step S3 specifically comprises the following steps:
Respectively connecting the connectors at two ends of the metal wire into the positive electrode and the negative electrode of a direct current power supply according to a first preset rule, switching on a direct current power supply switch, and carrying out a consolidation test on the soil body to be subjected to the compression test to obtain a test result;
The first preset rule is as follows:
After the direct-current power switch is turned on, the magnetic field generated by the top of the spiral coil formed by the joint parts except the two ends of the metal wire in the soil body to be subjected to the compression test is repelled from the first magnetic field.
5. The method of claim 1, wherein the step of determining the position of the substrate comprises,
The step S3 specifically comprises the following steps:
respectively connecting the connectors at the two ends of the metal wire into the positive electrode and the negative electrode of a direct current power supply according to a second preset rule, switching on a direct current power supply switch, and carrying out a consolidation test on the soil body to be subjected to the compression test to obtain a test result;
the second preset rule is as follows:
After the direct current power switch is turned on, the magnetic field generated by the joint parts of the metal wire except the two ends forms the top of the spiral coil in the soil body to be subjected to the compression test is repelled with the second magnetic field, and the magnetic field generated by the joint parts of the metal wire except the two ends forms the bottom of the spiral coil in the soil body to be subjected to the compression test is repelled with the third magnetic field.
6. The method according to claim 4 or 5, wherein,
The test results include: and the consolidation coefficient and the compression modulus of the soil body to be subjected to the compression test.
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| CN202210503611.2A CN115112858B (en) | 2022-05-09 | 2022-05-09 | Test method for accelerating soil consolidation settlement through magnetic field |
| PCT/CN2022/131901 WO2023216539A1 (en) | 2022-05-09 | 2022-11-15 | Test method for accelerating soil consolidation settlement by means of magnetic field |
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| CN202210503611.2A CN115112858B (en) | 2022-05-09 | 2022-05-09 | Test method for accelerating soil consolidation settlement through magnetic field |
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| CN106840878A (en) * | 2017-01-23 | 2017-06-13 | 重庆科技学院 | Device based on electromagnetism loading measurement Consolidation Deformation of Soil |
| CN110095334A (en) * | 2019-04-09 | 2019-08-06 | 三峡大学 | A kind of experimental provision and method using Ampere force simulation rock stress condition |
| CN111855745A (en) * | 2020-06-10 | 2020-10-30 | 东南大学 | Electromagnetic type geotechnical engineering hypergravity simulation device and operation method |
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| WO2023216539A1 (en) | 2023-11-16 |
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