CN118017240A - Microwave sintering device and method for collapsible loess - Google Patents
Microwave sintering device and method for collapsible loess Download PDFInfo
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- CN118017240A CN118017240A CN202410414270.0A CN202410414270A CN118017240A CN 118017240 A CN118017240 A CN 118017240A CN 202410414270 A CN202410414270 A CN 202410414270A CN 118017240 A CN118017240 A CN 118017240A
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- 238000009768 microwave sintering Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005245 sintering Methods 0.000 claims abstract description 74
- 230000005855 radiation Effects 0.000 claims abstract description 21
- 238000012360 testing method Methods 0.000 claims description 73
- 230000007062 hydrolysis Effects 0.000 claims description 3
- 238000006460 hydrolysis reaction Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 230000005672 electromagnetic field Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a microwave sintering device and a microwave sintering method for collapsible loess, wherein the microwave sintering device comprises a circular waveguide slot antenna array, wherein the circular waveguide slot antenna array is vertically inserted into a loess foundation to be treated; the circular waveguide slot antenna array comprises a plurality of circular waveguide slot antennas which are linearly arranged; each circular waveguide slot antenna comprises a circular waveguide, and a radiation slot is formed in the side wall of the circular waveguide; the circular waveguide is used for transmitting electromagnetic waves in a TM 01 mode; the radiation gap is used for radiating electromagnetic waves in the circular waveguide into the loess foundation to be treated outside the circular waveguide; the invention realizes the sintering and solidification of collapsible loess in the loess foundation to be treated, has faster sintering speed, higher sintering efficiency and better sintering result; can effectively improve the sintering range and further improve the microwave sintering efficiency of collapsible loess.
Description
Technical Field
The invention belongs to the technical field of microwave antennas, and particularly relates to a microwave sintering device and method for collapsible loess.
Background
In actual civil engineering, due to the collapsibility of loess, after a collapsible loess foundation is soaked by water, the foundation bearing capacity of the collapsible loess foundation is obviously reduced, and the ground deformation and the damage of an upper building structure are caused; therefore, the collapsible loess foundation needs to be reinforced to avoid the occurrence of engineering safety accidents.
At present, the reinforcement treatment for collapsible loess foundation is mainly a thermal reinforcement method; the traditional heat strengthening method is to directly sinter and strengthen collapsible loess by utilizing heat energy through heat conduction and heat radiation modes, and has the defects of long sintering heating time, high energy consumption, serious environmental heat loss and low heat utilization rate.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a microwave sintering device and a microwave sintering method for collapsible loess, which are used for solving the technical problems of long sintering heating time, high energy consumption, serious environmental heat dissipation and low heat utilization rate of the traditional heat reinforcement method.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a microwave sintering device for collapsible loess, which comprises a circular waveguide slot antenna array, wherein the circular waveguide slot antenna array is vertically inserted into a loess foundation to be treated;
the circular waveguide slot antenna array comprises a plurality of circular waveguide slot antennas which are linearly arranged;
Each circular waveguide slot antenna comprises a circular waveguide, and a radiation slot is formed in the side wall of the circular waveguide; the circular waveguide is used for transmitting electromagnetic waves in a TM 01 mode; the radiation gap is used for radiating electromagnetic waves in the circular waveguide into the loess foundation to be treated outside the circular waveguide.
Further, the distance between two adjacent circular waveguide slot antennas is half of the wavelength of the electromagnetic wave of the TM 01 mode.
Further, the device also comprises a microwave electromagnetic energy source, a power divider and a plurality of coaxial feeder lines;
The output end of the microwave electromagnetic energy source is connected with the input end of the power divider, and the power divider is provided with a plurality of output ports; one end of each coaxial feeder is connected to a plurality of output ports of the power divider, and the other end of each coaxial feeder is correspondingly connected with each circular waveguide slot antenna.
Further, the device also comprises a wave absorbing structure; the wave absorbing structure is arranged between the circular waveguide slot antenna array and an operator and is used for absorbing electromagnetic waves radiated outwards by the circular waveguide slot antenna array.
Further, the radiation slot comprises a plurality of slot groups, and the slot groups are uniformly arranged along the length direction of the circular waveguide; each gap group comprises a plurality of gaps, and the plurality of gaps are uniformly distributed on the same circumference of the circular waveguide.
The invention also provides a microwave sintering method for collapsible loess, which utilizes the microwave sintering device for collapsible loess;
The microwave sintering method for collapsible loess comprises the following steps:
an antenna placement test hole is formed in the loess foundation to be treated;
Vertically inserting one circular waveguide slot antenna in a circular waveguide slot antenna array into the antenna placement test hole; performing a sintering test on collapsible loess around the antenna placement test hole by using a circular waveguide slot antenna inserted in the antenna placement test hole;
after the sintering test is finished, sampling the sintered collapsible loess to obtain a sintered collapsible loess sample; carrying out a sintering test result test on the sintered collapsible loess sample to obtain a sintering test result;
Comparing the sintering test result with a preset sintering result, and if the sintering test result meets the requirement, opening a plurality of antenna arrangement holes on two sides of the antenna arrangement test hole;
respectively inserting the remaining circular waveguide slot antennas in the circular waveguide slot antenna array into a plurality of antenna mounting holes;
and sintering the loess foundation to be treated by using all the circular waveguide slot antennas in the circular waveguide slot antenna array according to the sintering test requirement.
Further, the hole depth of the antenna placement test hole or the antenna placement hole is adapted to the length of the circular waveguide slot antenna, and the aperture of the antenna placement test hole or the antenna placement hole is matched with the outer diameter of the circular waveguide slot antenna.
Further, the sum of the numbers of the antenna placement test holes and the antenna placement holes is the same as the number of the circular waveguide slot antennas in the circular waveguide slot antenna array.
Further, the sintering test results comprise the compressive strength, the shearing resistance and the hydrolysis time of the sintered collapsible loess sample.
Furthermore, the working frequency of the circular waveguide slot antenna is 2.45GHz, and the inside of the circular waveguide slot antenna is filled with air.
Compared with the prior art, the invention has the beneficial effects that:
According to the microwave sintering device for collapsible loess, provided by the invention, electromagnetic waves are radiated into the loess foundation to be treated by utilizing the radiation slots on each circular waveguide slot antenna in the circular waveguide slot antenna array, and the arrangement state of polar molecules in the loess foundation to be treated deflects along with the direction of an electromagnetic field under the action of the electromagnetic waves, so that a large amount of heat is generated by overcoming the original relative acting force, and the sintering and curing of the collapsible loess in the loess foundation to be treated are realized; compared with the traditional heat-strengthening sintering, the method has the advantages of higher sintering speed, higher sintering efficiency and better sintering result; secondly, a plurality of circular waveguide slot antennas are linearly arranged to form a circular waveguide slot antenna array, and on the basis of ensuring that two adjacent circular waveguide slot antennas do not generate a coherent superposition effect, the sintering range can be effectively improved, and further the microwave sintering efficiency of collapsible loess is improved.
Further, the distance between two adjacent circular waveguide slot antennas is set to be half of the wavelength of electromagnetic waves transmitted in the circular waveguide, so that the occurrence of coherent superposition cancellation phenomenon between the two adjacent circular waveguide slot antennas can be avoided, the distance between the two adjacent circular waveguide slot antennas is used as an effective sintering range, the maximum sintering coverage can be met, and the sintering energy consumption is greatly reduced.
Furthermore, a microwave electromagnetic energy source is adopted and is combined with a power divider and a coaxial feed line to feed the circular waveguide slot antennas, so that each circular waveguide slot antenna can radiate electromagnetic energy uniformly to the periphery.
Further, the wave absorbing structure is arranged between the circular waveguide slot antenna array and the operator, so that the effective protection of the operator is achieved.
Drawings
Fig. 1 is a top view of a microwave sintering apparatus for collapsible loess according to example 1;
Fig. 2 is a schematic structural diagram of a circular waveguide slot antenna in embodiment 1;
Fig. 3 is a flowchart of a microwave sintering method for collapsible loess according to example 2.
Wherein, 100, the circular waveguide slot antenna; 101. a circular waveguide; 102. a radiation slit.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the following specific embodiments are used for further describing the invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The embodiment 1 provides a microwave sintering device for collapsible loess, which comprises a feed structure, a circular waveguide slot antenna array, a wave absorbing structure and temperature detection equipment; the output end of the feed structure is connected with the circular waveguide slot antenna array and is used for feeding microwave electromagnetic energy to the circular waveguide slot antenna array; the circular waveguide slot antenna array is vertically inserted into the loess foundation to be treated, and is used for radiating microwave electromagnetic energy outwards into the loess foundation to be treated and sintering collapsible loess in the loess foundation to be treated; the wave absorbing structure is arranged between the circular waveguide slot antenna array and an operator and is used for absorbing electromagnetic waves radiated outwards by the circular waveguide slot antenna array so as to avoid the electromagnetic waves from damaging the operator; the temperature detection device is buried around the circular waveguide slot antenna 100 in the circular waveguide slot antenna array and is used for detecting the sintering temperature of collapsible loess in the loess foundation to be treated in real time.
As shown in fig. 1-2, the circular waveguide slot antenna array includes a plurality of circular waveguide slot antennas 100 that are linearly arranged, each circular waveguide slot antenna 100 includes a circular waveguide 101, and the circular waveguide 101 is vertically inserted into a loess foundation to be processed; the distance between two adjacent circular waveguide slot antennas 100 is half of the wavelength lambda of the electromagnetic wave transmitted in the circular waveguide 101; that is, the minimum distance between the outer surfaces of two adjacent circular waveguides 101 is half the wavelength λ of the electromagnetic wave transmitted in the circular waveguide 101.
The circular waveguide 101 is used for transmitting electromagnetic waves in a TM 01 (TRANSVERSE MAGNETIC) mode, a radiation gap 102 is formed in the side wall of the circular waveguide 101, and the radiation gap 102 is used for radiating the electromagnetic waves in the circular waveguide 101 into a loess foundation to be treated outside the circular waveguide 101; the radiation slot 102 includes a plurality of slot groups, and the plurality of slot groups are uniformly arranged along the length direction of the circular waveguide 101; each gap group comprises a plurality of gaps, and the plurality of gaps are uniformly distributed on the same circumference of the circular waveguide 101; the TM 01 (TRANSVERSE MAGNETIC 01) mode is the first mode of the transverse wave modes (TRANSVERSE MAGNETIC mode, TM).
The feed structure comprises a microwave electromagnetic energy source, a power divider and a plurality of coaxial feeder lines, and the output end of the microwave electromagnetic energy source is connected with the input end of the power divider; the power divider is provided with a plurality of output ports and is used for converting one path of microwave electromagnetic energy output by the microwave electromagnetic energy source into a plurality of paths of microwave electromagnetic signals with the same output; one end of each of the coaxial feeder lines is connected to a plurality of output ports of the power divider, and the other end of each of the coaxial feeder lines is correspondingly connected with a plurality of circular waveguide slot antennas 100; specifically, the coaxial feeder is inserted into a preset position at the top end of the circular waveguide 101, so as to excite an electromagnetic wave in TM 01 mode in the circular waveguide 101.
The wave absorbing structure adopts a wave absorbing plate, and the wave absorbing plate is arranged between the circular waveguide slot antenna array and an operator so as to absorb electromagnetic waves radiated outwards by the circular waveguide slot antenna array and avoid the electromagnetic waves from damaging the operator.
The operating frequency of the circular waveguide slot antenna 100 is 2.45GHz, and the inside of the circular waveguide slot antenna 100 is filled with air.
Working principle:
The microwave sintering device for collapsible loess according to embodiment 1 vertically inserts a plurality of circular waveguide slot antennas 100 in a circular waveguide slot antenna array into a loess foundation to be treated, and irradiates electromagnetic waves to the collapsible loess around the circular waveguide slot antennas 100 by using each circular waveguide slot antenna 100 in the circular waveguide slot antenna array; specifically, electromagnetic waves are radiated into the loess foundation to be treated by using the radiation slots 102 on each circular waveguide slot antenna 100, and electromagnetic energy of the electromagnetic waves is converted into heat energy due to the loss of the collapsible loess in the loess foundation to be treated on the electromagnetic waves, so that the collapsible loess around the circular waveguide slot antennas 100 is heated; the circular waveguide slot antennas 100 are linearly arranged to form a circular waveguide slot antenna array, so that collapsible loess in a larger area can be uniformly heated, a sintering area is effectively increased, and further the sintering treatment efficiency of a loess foundation is improved.
Example 2
As shown in fig. 3, embodiment 2 provides a microwave sintering method for collapsible loess, comprising the steps of:
Step 1, an antenna placement test hole is formed in a loess foundation to be treated. The aperture of the antenna placement test hole is adapted to the outer diameter of the circular waveguide slot antenna 100 in the circular waveguide slot antenna array described in embodiment 1, and the aperture depth of the antenna placement test hole is adapted to the length of the circular waveguide slot antenna 100 in the circular waveguide slot antenna array described in embodiment 1.
And 2, taking one circular waveguide slot antenna 100 in the circular waveguide slot antenna array as a test antenna, and vertically inserting the test antenna into the antenna placement test hole.
And 3, arranging temperature detection equipment in the loess foundation to be treated, and arranging a wave absorbing plate in the direction of an operator. The temperature detection equipment is uniformly arranged around the test antenna and is used for detecting the sintering temperature of collapsible loess in the loess foundation to be treated in the sintering test process; preferably, the temperature detection device employs a temperature detection sensor, and the tolerance temperature of the temperature detection sensor is at least 600 ℃.
Step 4, inserting one end of a coaxial feeder into a preset position at the top end of the test antenna, and connecting the other end of the coaxial feeder with the output end of the microwave electromagnetic energy source; then, a switch circuit protection and an electric protection are arranged.
And step 5, starting the microwave electromagnetic energy source according to the preset test parameter requirements, and performing a sintering test on collapsible loess around the antenna placement test hole by using the test antenna.
Step 6, after the sintering test of the collapsible loess around the antenna arrangement test hole is finished, sampling the sintered collapsible loess to obtain a sintered collapsible loess sample; and testing the sintering test result of the sintered collapsible loess sample to obtain a sintering test result. Specifically, layering around the antenna arrangement test hole to obtain a sintered collapsible loess sample, and performing mechanical property test on the sintered collapsible loess sample to obtain a sintering test result; the sintering test results comprise the compressive strength, the shearing resistance and the hydrolysis time of the sintered collapsible loess sample.
And 7, comparing the sintering test result with a preset sintering result. If the sintering test result meets the requirement, jumping to the step 8; otherwise, carrying out the sintering test again on the return to the step 1; specifically, comparing the sintering test result with a preset sintering result, if the sintering test result is within a preset threshold range of the sintering result, the sintering test result meets the requirements, and jumping to the step 8; otherwise, returning to the step 1 to carry out the sintering test again; when the sintering test is performed again, the sintering test is performed again according to the operation steps of steps 1-5 after the structural parameters of the circular waveguide slot antenna 100 and the preset test parameter requirements in step 5 are readjusted.
And 8, arranging a plurality of antenna arranging holes on two sides of the antenna arranging test hole. The number of the antenna mounting holes is the same as the number of the remaining circular waveguide slot antennas 100 in the circular waveguide slot antenna array; that is, the sum of the numbers of the antenna arrangement test holes and the antenna arrangement holes is the same as the number of the circular waveguide slot antennas 100 in the circular waveguide slot antenna array; likewise, the aperture of the antenna mounting hole is adapted to the outer diameter of the circular waveguide slot antenna 100, and the hole depth of the antenna mounting hole is adapted to the length of the circular waveguide slot antenna 100.
And 9, respectively inserting the remaining circular waveguide slot antennas 100 in the circular waveguide slot antenna array into a plurality of antenna mounting holes.
And 10, arranging temperature detection sensors around all the circular waveguide slot antennas 100, and arranging a wave absorbing plate in the direction of an operator.
Step 11, all circular waveguide slot antennas 100 are connected to the output end of the microwave electromagnetic energy source by using the power divider and the coaxial feeder.
And 12, restarting the microwave electromagnetic energy source according to the preset test parameter requirements, and sintering the loess foundation to be treated by utilizing all the circular waveguide slot antennas 100 in the circular waveguide slot antenna array.
In the microwave sintering method for collapsible loess according to embodiment 2, one of the circular waveguide slot antennas 100 in the circular waveguide slot antenna array is used as a test antenna, and a sintering test is performed on the loess foundation to be treated to obtain the sintering result of collapsible loess in the space where the circular waveguide slot antenna 100 radiates outwards; by detecting the mechanical properties of the sintered collapsible loess sample, whether the feeding and placement of the circular waveguide slot antenna 100 are reasonable or not is checked according to the test result of the sintering test, the accuracy of the sintering process is ensured, and the sintering process time is effectively reduced.
According to the microwave sintering device and method for collapsible loess, the plurality of circular waveguide slot antennas 100 which are linearly arranged are combined to form the circular waveguide slot antenna array and are vertically inserted into the loess foundation to be treated, electromagnetic waves are radiated into the collapsible loess of the loess foundation to be treated by using the circular waveguide slot antenna array, so that the collapsible loess is sintered, uniform heating of the collapsible loess in a larger volume area is realized, the sintering temperature can be greatly reduced, and the sintering time can be shortened; the circular waveguide slot antenna 100 adopts a principle that a radiation slot 102 is formed on a circular waveguide 101, electromagnetic waves in the circular waveguide 101 radiate to the outside space through the radiation slot 102, the electromagnetic waves are radiated in collapsible loess around the circular waveguide slot antenna, and heat is generated by the collapsible loess under the action of an electromagnetic field, so that the purpose of sintering the collapsible loess is achieved; the circular waveguide slot antenna array has the characteristics of simple structure, easy manufacture and installation and higher radiation efficiency and directivity.
In the invention, the circular waveguide slot antenna 100 is designed in a standing wave array mode, namely, a plurality of slot groups are uniformly distributed on the same circumference of the circular waveguide 101 in the length direction of the circular waveguide 101, so that the circular waveguide slot antenna 100 can realize annular uniform radiation, namely, electromagnetic waves are radiated to the outside space in a side-emitting array mode; secondly, the circular waveguide slot antenna 100 is fed by adopting a coaxial feeder, the coaxial feeder can excite TM 01 mode electromagnetic waves in the circular waveguide slot antenna 100, and TM 01 mode electromagnetic waves can realize a uniform annular radiation effect through radiation slots 102 formed in the side wall of the circular waveguide 101; by arranging the wave absorbing plate between the circular waveguide slot antenna array and the operator, the wave absorbing plate is used for absorbing electromagnetic waves radiated by the circular waveguide slot antenna 100 to the direction of the operator, and effective protection of the operator is achieved.
According to the invention, the circular waveguide slot antenna array is vertically inserted into the loess foundation to be treated, the microwave radiation is used for sintering loess instead of the traditional heat reinforcement sintering method, heat is generated under the action of an electromagnetic field of soil body, uniform heating in a larger volume area can be realized, sintering temperature can be greatly reduced, sintering time is shortened, construction period is saved, sintering efficiency is greatly improved, and good economic benefit can be brought.
The above embodiment is only one of the implementation manners capable of implementing the technical solution of the present invention, and the scope of the claimed invention is not limited to the embodiment, but also includes any changes, substitutions and other implementation manners easily recognized by those skilled in the art within the technical scope of the present invention.
Claims (10)
1. The microwave sintering device for collapsible loess is characterized by comprising a circular waveguide slot antenna array, wherein the circular waveguide slot antenna array is vertically inserted into a loess foundation to be treated;
The circular waveguide slot antenna array comprises a plurality of circular waveguide slot antennas (100) which are linearly arranged;
Each circular waveguide slot antenna (100) comprises a circular waveguide (101), and a radiation slot (102) is formed in the side wall of the circular waveguide (101); the circular waveguide (101) is used for transmitting electromagnetic waves in TM 01 modes; the radiation gap (102) is used for radiating electromagnetic waves in the circular waveguide (101) into the loess foundation to be treated outside the circular waveguide (101).
2. The microwave sintering device for collapsible loess according to claim 1, characterized in that a space between adjacent two of said circular waveguide slot antennas (100) is half of a wavelength of an electromagnetic wave of said TM 01 mode.
3. The microwave sintering device for collapsible loess as set forth in claim 1, further comprising a microwave electromagnetic energy source, a power divider and a plurality of coaxial feed lines;
the output end of the microwave electromagnetic energy source is connected with the input end of the power divider, and the power divider is provided with a plurality of output ports; one ends of the coaxial feeder lines are respectively connected to the output ports of the power divider, and the other ends of the coaxial feeder lines are respectively connected with the circular waveguide slot antennas (100).
4. The microwave sintering device for collapsible loess as set forth in claim 1, further comprising a wave absorbing structure; the wave absorbing structure is arranged between the circular waveguide slot antenna array and an operator and is used for absorbing electromagnetic waves radiated outwards by the circular waveguide slot antenna array.
5. The microwave sintering device for collapsible loess according to claim 1, characterized in that the radiation slit (102) comprises a plurality of slit groups, which are uniformly arranged along the length direction of the circular waveguide (101); each gap group comprises a plurality of gaps, and the plurality of gaps are uniformly distributed on the same circumference of the circular waveguide (101).
6. A microwave sintering method for collapsible loess, characterized in that the microwave sintering device for collapsible loess as set forth in any one of claims 1-5 is utilized;
The microwave sintering method for collapsible loess comprises the following steps:
an antenna placement test hole is formed in the loess foundation to be treated;
Vertically inserting one circular waveguide slot antenna (100) in a circular waveguide slot antenna array into the antenna placement test hole; performing a sintering test on collapsible loess around the antenna installation test hole by using a circular waveguide slot antenna (100) inserted into the antenna installation test hole;
after the sintering test is finished, sampling the sintered collapsible loess to obtain a sintered collapsible loess sample; carrying out a sintering test result test on the sintered collapsible loess sample to obtain a sintering test result;
Comparing the sintering test result with a preset sintering result, and if the sintering test result meets the requirement, opening a plurality of antenna arrangement holes on two sides of the antenna arrangement test hole;
Respectively inserting the remaining circular waveguide slot antennas (100) in the circular waveguide slot antenna array into a plurality of antenna mounting holes;
And sintering the loess foundation to be treated by using all circular waveguide slot antennas (100) in the circular waveguide slot antenna array according to the sintering test requirement.
7. The microwave sintering method for collapsible loess according to claim 6, characterized in that the antenna mounting test hole or the hole depth of the antenna mounting hole is adapted to the length of the circular waveguide slot antenna (100), and the aperture of the antenna mounting test hole or the antenna mounting hole is matched to the outer diameter of the circular waveguide slot antenna (100).
8. The microwave sintering method for collapsible loess as set forth in claim 6, characterized in that the sum of the number of the antenna mounting test holes and the number of the antenna mounting holes is the same as the number of circular waveguide slot antennas (100) in the circular waveguide slot antenna array.
9. The method according to claim 6, wherein the sintering test results include compression strength, shear resistance and hydrolysis time of the sintered collapsible loess sample.
10. The microwave sintering method for collapsible loess according to claim 6, wherein the operating frequency of the circular waveguide slot antenna (100) is 2.45GHz, and the inside of the circular waveguide slot antenna (100) is filled with air.
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