Automatic evaluation device and automatic evaluation method for soil improvement material blending test

Abstract

To provide an automatic evaluation device and an automatic evaluation method capable of automatically carrying out a blending test on soil improvement material with high accuracy.SOLUTION: An automatic evaluation device for a blending test on soil improvement material comprises a calculation device 11, an automatic measuring device 14, a sample production device 15, and a sample evaluation device 17. The calculation device 11 sets a blending condition of samples with multi-blending different in at least one or both of a test soil amount and a soil improvement material additive amount based on physical properties of the test soil and a target improved value on objective soil to be improved to transmit the blending condition to the automatic measuring device 14. The automatic measuring device 14 measures the test soil and the soil improvement material based on the blending condition of the sample of multi-blending set with the calculation device 11 to send the same to the sample production device 15. The sample production device 15 mixes the measured test soil and soil improvement material to mold the mixed product and prepare samples of multi-blending. The sample evaluation device 17 evaluates the sample of multi-blending.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an automatic evaluation device and an automatic evaluation method for a blending test using a soil improvement material. [Background technology]

[0002] When carrying out ground improvement work, it is common to conduct laboratory mix tests using soil improvement materials on the target soil to determine the amounts of soil improvement materials and water to be added on site. For laboratory mix tests, soil collected on site is passed through a 9.5mm sieve for uniaxial compression tests and a 37.5mm sieve for CBR tests to ensure uniformity. Depending on the soil's condition, the soil is mixed in a mixer to achieve a uniform state. The soil's moisture content and wet density are also measured, and these values ​​are used in the laboratory mix test. The amount of water required to add (indoor mix table) is calculated based on the soil, solidification material, and on-site construction method. The amounts added according to the indoor mix table are measured and mixed in a mixer to create solidified soil. This solidified soil is then packed into a formwork to prepare a test specimen. The strength of the test specimen is then measured to determine the amounts of soil improvement materials, water, etc. needed to achieve the target improvement value for the target site.

[0003] The specimens used in this indoor mix test are prepared according to the Geotechnical Society's standard "Method for preparing specimens without compaction of stabilized soil" (JGS0821-2020) or the Cement Association's standard test method "Strength test method for improved soils using cement-based solidification materials" (JCAS L-01:2006). The former, also known as the tapping method, involves filling a mold with solidified soil and striking the mold against a floor or other surface to remove air bubbles. This method is suitable for relatively soft solidified soil that forms a ball-like or string-like shape. The latter, also known as the rammer method, involves compacting the solidified soil using the energy generated by the fall of a rammer to prepare a specimen. This method is used when the solidified soil is relatively hard and difficult to prepare a specimen using the tapping method. Patent Document 1 discloses a method for selecting and preparing a specimen, which makes it easy to determine whether the tapping method or the rammer method is appropriate for preparing specimens based on the soil characteristics. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-127647 Summary of the Invention [Problem to be solved by the invention]

[0005] Mixing tests using soil improvement materials are an extremely important task for determining the amount of soil improvement material to be used in ground improvement work. Therefore, studies have been conducted to improve the accuracy of mixing tests using soil improvement materials. However, the preparation of test specimens is done manually, and there is a need to reduce the burden on workers, such as the risk of tendonitis and the risk of fingers getting caught in the rammer. It is also necessary to reduce variability due to the skill and ability of workers and to prevent human error, such as measuring the strength of the wrong test specimen.

[0006] This invention has been made in consideration of the above-mentioned circumstances, and aims to provide an automatic evaluation device and an automatic evaluation method for blending tests using soil improvement materials that can reduce the burden on workers in blending tests using soil improvement materials and obtain highly accurate results. [Means for solving the problem]

[0007] In order to solve the above problems, the automatic evaluation device for a blending test using a soil improvement material of the present invention is an automatic evaluation device for a blending test using a soil improvement material, which performs a blending test using test soil and a soil improvement material collected in advance from a land to be improved based on a target improvement value of the land to be improved, and has a calculation device, an automatic weighing device, a test piece preparation device, and a test piece evaluation device, and the calculation device determines at least the amount of the test soil and the amount of the soil improvement material to be added based on the physical properties of the test soil and the target improvement value of the land to be improved. The automatic weighing device sets the blending conditions for the multiple blends of test specimens, one or both of which are different, and transmits the information to the automatic weighing device. The automatic weighing device weighs the test soil and the soil improvement material based on the blending conditions for the multiple blends of test specimens set by the calculation device, and transports them to the test specimen preparation device. The test specimen preparation device kneads the weighed test soil and the soil improvement material, molds the resulting mixture, and prepares the multiple blends of test specimens. The test specimen evaluation device is configured to evaluate the multiple blends of test specimens.

[0008] According to the automatic evaluation device of the present invention configured as described above, the calculation device automatically measures the test soil and soil improvement material using the automatic weighing device and prepares test specimens using the test specimen preparation device based on the physical properties of the test soil and the target improvement values ​​of the soil improvement target area, thereby reducing the burden on workers during the blending test. Furthermore, since the calculation device is used to set the blending conditions for multiple blends of test specimens, highly accurate blending test results can be obtained. Furthermore, highly accurate blending settings can be made.

[0009] Here, in the automatic evaluation device for blending tests using soil improvement materials of the present invention, the physical properties of the test soil are wet density and water content, and the device may be configured to further include a physical property measuring device that measures the wet density and water content of the test soil and transfers the obtained measurement data to the calculation device. In this case, the physical property measuring device measures the wet density and water content of the test soil and inputs the obtained measured values ​​into the calculation device, thereby further reducing the burden on the operator.

[0010] Furthermore, the automatic evaluation device for blending tests using soil improvement materials of the present invention may further be configured to include a classification device that classifies the test soil, adjusts the particle size of the test soil, and supplies it to the automatic weighing device. In this case, the classification device adjusts the particle size of the test soil and supplies it to the automatic weighing device, further reducing the burden on the operator.

[0011] In addition, in the automatic evaluation device for blending tests using soil improvement materials of the present invention, the classification device may have a test soil classifier for uniaxial compressive strength tests and a test soil classifier for CBR tests, the specimen preparation device may have a mold for molding specimens for uniaxial compressive strength tests and a mold for molding specimens for CBR tests, the specimen evaluation device may have a uniaxial compressive strength testing machine and a CBR testing machine, and the calculation device may be configured to select either the uniaxial compressive strength test or the CBR test as the evaluation method for the specimen and send the information to the classification device, the specimen preparation device, and the specimen evaluation device. In this case, the target improvement value for the soil improvement target area can be set using either the unconfined compressive strength or the CBR value, making it possible to respond to the improvement of various soil improvement target areas.

[0012] Furthermore, in the automatic evaluation device for blending tests using soil improvement materials of the present invention, the test specimen preparation device can switch the test specimen preparation method between either the tapping method or the rammer method, and can be configured to pour a mixture of the test soil and the soil improvement material, which has the same blend as the test specimen to be prepared, into a cylinder placed on a flow table, and then vertically lift and remove the cylinder, leaving only the mixture on the flow table, measure the flow value of the mixture by a flow test in accordance with JIS R 5201:2015 (Physical testing methods for cement), and select the tapping method if the flow value is equal to or greater than a predetermined value, and select the rammer method if the flow value is less than the predetermined value. In this case, the test specimen can be prepared under optimal conditions to suit the test soil, which increases the accuracy of the mix test.

[0013] Furthermore, the automatic evaluation device for blending tests using soil improvement materials of the present invention may further be configured to have a curing device that cures the test specimens prepared by the test specimen preparation device and transports the cured test specimens to the test specimen evaluation device. In this case, the work from preparing the specimen to evaluating the specimen can be automated, further reducing the burden on the worker.

[0014] Furthermore, the automatic evaluation device for blending tests using soil improvement materials of the present invention may further be configured to have a report creation device that creates a report that describes the physical properties of the test soil, the blending conditions of the test specimen, and the strength of the test specimen. In this case, the report creation device creates the report, which further reduces the burden on the worker and eliminates errors due to data transcription errors.

[0015] In addition, in the automatic evaluation device for blending tests using soil improvement materials of the present invention, the calculation device may have an artificial intelligence processing unit, and the artificial intelligence processing unit may be configured to set blending conditions for multiple blends of test specimens based on the physical properties of the test soil, the target improvement value of the soil improvement target area, and big data. In this case, the computing device uses big data to set the blending conditions for the test specimen, further increasing the accuracy of the blending test.

[0016] The automatic evaluation method for blending tests using soil improvement materials of the present invention is an automatic evaluation method using the automatic evaluation device for blending tests using soil improvement materials of the present invention described above, and includes the following steps: a step of inputting a target improvement value for the soil improvement site into the calculation device; a setting step in which the calculation device sets blending conditions for multiple blends of test specimens, where at least one or both of the amount of the test soil and the amount of the soil improvement material added are different, based on the physical properties of the test soil and the target improvement value for the soil improvement site, and transmits the information to the automatic weighing device; a weighing step in which the automatic weighing device weighs the test soil and the soil improvement material based on the blending conditions for the multiple blends of test specimens set by the calculation device, and transports them to the test specimen preparation device; a test specimen preparation step in which the test specimen preparation device kneads the weighed test soil and the soil improvement material, and shapes the resulting mixture to prepare the test specimens of multiple blends; and an evaluation step in which the test specimen evaluation device evaluates the test specimens of multiple blends.

[0017] According to the automatic evaluation method of the present invention configured in this manner, an automatic evaluation device for blending tests using the soil improvement material of the present invention is used, which reduces the burden on workers and allows for highly accurate results to be obtained. [Effects of the Invention]

[0018] According to the present invention, it is possible to provide an automatic evaluation device and an automatic evaluation method for blending tests using soil improvement materials, which can reduce the burden on workers in blending tests using soil improvement materials and obtain highly accurate results. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a block diagram showing an automatic evaluation device for a blending test using a soil improvement material according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing an automatic evaluation device for a blending test using a soil improvement material according to one embodiment of the present invention.

[0021] As shown in Figure 1, automatic evaluation device 10 includes a calculation device 11, a physical property measurement device 12, a classification device 13, an automatic weighing device 14, a specimen preparation device 15, a curing device 16, a specimen evaluation device 17, and a report creation device 18. Automatic evaluation device 10 includes test soil tank 1, which stores test soil collected in advance from a site to be improved, soil improvement material tank 2, which stores soil improvement material to be used for improving the soil at the site to be improved, and water tank 3, which stores water. As the soil improvement material, various compounds used as soil improvement materials, such as cement, cement-based solidification material, and quicklime, can be used.

[0022] The computing device 11 is connected to a physical property measuring device 12 and sets the mix conditions for multiple mixes of test specimens, where at least one or both of the amount of test soil and the amount of soil improvement material added differs, based on the physical properties of the test soil and the target improvement value of the soil improvement target area. The information (the number of test specimens to be prepared and the mix of each test specimen) is transmitted to an automatic weighing device 14. Furthermore, the computing device 11 determines whether the test specimens should be evaluated by a uniaxial compressive strength test or a CBR test, depending on whether the target improvement value of the soil improvement target area is uniaxial compressive strength or CBR value. The information (the test specimen evaluation method) is transmitted to a classification device 13, a test specimen preparation device 15, and a test specimen evaluation device 17. Furthermore, the computing device 11 sets the curing conditions for the test specimens. The conditions are transmitted to a curing device 16. The computing device 11 may be a computer connected to each device via communication means, or it may be a cloud server.

[0023] The computing device 11 has an artificial intelligence processing unit, which may be configured to set the mixing conditions for multiple test specimens based on the physical properties of the test soil, the target improvement values ​​of the soil improvement site, and big data 4. The big data 4 may include accumulated data on the type of soil, physical properties, unconfined compressive strength, CBR, etc. from previous indoor mixing tests, the physical properties of the test soil at the soil improvement site, and the strength of improved soil using test soil from around the soil improvement site. The computing device 11 may be a computer or a cloud server.

[0024] The physical property measuring device 12 measures the physical properties of the test soil to be used in the calculation device 11, and transfers the obtained measurement data to the calculation device 11. The physical properties of the test soil are, for example, wet density and moisture content. The physical property measuring device 12 of this embodiment is configured to automatically collect test soil from the test soil tank 1 and measure the wet density and moisture content. The wet density is the value (m / V) obtained by dividing the mass m of the test soil specimen by the volume V. In this embodiment, a container with a volume V is prepared, and the wet density is calculated from the amount of test soil filled into this container (mass m) and the volume V of the container. The moisture content is calculated by dividing the dry mass (m d ) to the mass of water contained in the test soil (m w ) expressed as a percentage (m w / m d In this embodiment, the weight loss (mass of water (m w )) and the mass of the soil after drying (dry mass (m d )) and calculate the water content.

[0025] The classification device 13 is connected to the test soil tank 1 and uses a test soil classifier to adjust the particle size of the test soil removed from the test soil tank 1, and supplies the soil to the automatic weighing device 14. The classification device 13 has a test soil classifier for the uniaxial compressive strength test and a test soil classifier for the CBR test. The classification device 13 selects a test soil classifier and adjusts the particle size of the test soil according to information sent from the calculation device 11. A sieve with 9.5 mm openings can be used as the test soil classifier for the uniaxial compressive strength test. A sieve with 37.5 mm openings can be used as the test soil classifier for the CBR test.

[0026] The automatic weighing device 14 is connected to the classifying device 13, the soil improvement material tank 2, and the water tank 3. The automatic weighing device 14 is equipped with a measuring instrument, and weighs the test soil transported from the classifying device 13, the soil improvement material taken out from the soil improvement material tank 2, and the water taken out from the water tank 3 in predetermined volume ratios based on the blending conditions for multiple blends of test specimens set by the computing device 11. The automatic weighing device 14 has a conveyor that transports the weighed test soil, soil improvement material, and water to the test specimen preparation device 15. A belt conveyor, for example, can be used as the conveyor.

[0027] The specimen preparation device 15 is connected to the automatic weighing device 14, kneads the test soil, soil improvement material, and water sent from the automatic weighing device 14, and molds the resulting mixture to prepare specimens of multiple blends. The specimen preparation device 15 has a conveyor that transports the prepared specimens to the curing device 16. The specimen preparation device 15 has a mold for forming specimens for the uniaxial compressive strength test and a mold for forming specimens for the CBR test. The specimen preparation device 15 selects a mold and prepares the specimens according to the information sent from the computing device 11.

[0028] The specimen preparation device 15 can switch the specimen preparation method between the tapping method and the rammer method. Furthermore, the specimen preparation device 15 is configured to perform a preliminary test to determine whether to use the tapping method or the rammer method. The preliminary test is performed as follows: A mixture having the same composition as the specimen to be prepared is poured into a cylinder placed on a flow table. The cylinder is then vertically lifted and removed, leaving only the mixture on the flow table. The flow value of the mixture is then measured using a flow test in accordance with JIS R 5201:2015 (Physical Testing Methods for Cement). If the flow value is equal to or greater than a predetermined value, the tapping method is selected; if the flow value is less than the predetermined value, the rammer method is selected. The predetermined value for the flow value is, for example, 110 mm. The steps of determining whether the flow value is equal to or greater than a predetermined value, selecting the tapping method if the flow value is equal to or greater than the predetermined value, and selecting the rammer method if the flow value is less than the predetermined value may be performed by the computing device 11.

[0029] The curing device 16 cures the specimen prepared by the specimen preparation device 15. The curing device 16 is capable of adjusting the temperature and humidity, and adjusts the temperature and humidity according to information transmitted from the computing device 11. The curing device 16 also has a transport device that transports the cured specimen to the specimen evaluation device 17 when the specimen reaches a predetermined test material age.

[0030] The specimen evaluation device 17 evaluates the strength of the specimen after curing. The specimen evaluation device 17 has a uniaxial compressive strength testing machine and a CBR testing machine. The specimen evaluation device 17 measures the strength of the specimen using the uniaxial compressive strength testing machine or the CBR testing machine in accordance with information transmitted from the computing device 11. The specimen evaluation device 17 has a transmitter that transmits the measurement results to the computing device 11.

[0031] The report creation device 18 creates a report that describes information such as the physical properties of the test soil (for example, wet density and water content), the mixture conditions of the specimen, the strength of the specimen at a specified age, etc. The report creation device 18 creates the report according to the information transmitted from the computing device 11.

[0032] Next, an automatic evaluation method using the automatic evaluation device 10 of this embodiment will be described. First, an operator stores test soil, soil improvement material, and water in the test soil tank 1, soil improvement material tank 2, and water tank 3, respectively, of the automatic evaluation device 10. The operator also inputs the target improvement value of the soil improvement target area into the calculation device 11. The target improvement value can be, for example, the unconfined compressive strength (kN / m 2 ) or CBR (%). When the target improvement value of the soil improvement site is input to the calculation device 11, the automatic evaluation device 10 performs the physical property measurement process, setting process, classification process, weighing process, specimen preparation process, curing process, evaluation process, and report creation process.

[0033] The physical property measurement process is performed by the physical property measurement device 12. The physical property measurement device 12 automatically samples the test soil stored in the test soil tank 1, measures the wet density and water content, and transmits the results to the calculation device 11.

[0034] The setting process is performed by the computing device 11. The computing device 11 sets the mix conditions for multiple test specimen mixes, with at least one or both of the test soil amount and the soil improvement agent amount, based on the wet density and water content of the test soil and the target improvement value of the soil improvement target area. The computing device 11 sets the mix conditions for the test soil, soil improvement agent, and water so that, for example, an optimal mix, which is estimated to have the optimal ratio of test soil to soil improvement agent, and multiple test specimen mixes with lower and higher soil improvement agent ratios compared to the optimal mix can be obtained. The information (the number of test specimens to be prepared and the mix conditions for each test specimen) is sent to the automatic weighing device 14. The computing device 11 also determines the test specimen evaluation method (either an unconfined compressive strength test or a CBR test) based on the target improvement value of the soil improvement target area. The information is sent to the classification device 13, the test specimen preparation device 15, and the test specimen evaluation device 17. The computing device 11 also sets the test specimen curing conditions. The conditions are transmitted to the curing device 16.

[0035] The classification process is carried out by the classifier 13. The classifier 13 adjusts the particle size of the test soil taken out from the test soil tank 1 using a test soil classifier. The test soil classifier is selected for either the uniaxial compressive strength test or the CBR test according to information sent from the computing device 11. The test soil whose particle size has been adjusted by the classifier 13 is transported to the automatic weighing device 14.

[0036] The weighing process is carried out by an automatic weighing device 14. The automatic weighing device 14 weighs the test soil transported from the classifying device 13, the soil improvement material taken out from the soil improvement material tank 2, and the water taken out from the water tank 3 in a predetermined volume ratio according to the information transmitted from the computing device 11. The weighed test soil, soil improvement material, and water are transported to a test specimen preparation device 15.

[0037] The test specimen preparation process is carried out by the test specimen preparation device 15. The test specimen preparation device 15 mixes the test soil, soil improvement material, and water transported from the automatic weighing device 14, and then places the resulting mixture in a predetermined mold and forms it to prepare test specimens of multiple compositions. The mold is selected according to information sent from the computing device 11, either for forming test specimens for uniaxial compressive strength tests or for CBR tests. The method of preparing the test specimens (tapping method, rammer method) is also determined by a preliminary test.

[0038] The curing process is carried out by a curing device 16. The curing device 16 cures the specimen transported from the specimen preparation device 15 for a predetermined period in an environment adjusted to a predetermined temperature and humidity in accordance with information transmitted from the computing device 11. The cured specimen is demolded from the formwork by an automatic demolding device and transported to a specimen evaluation device 17.

[0039] The evaluation process is carried out by the specimen evaluation device 17. The specimen evaluation device 17 evaluates the strength of the specimen transported from the curing device 16. The testing machine used by the specimen evaluation device 17 is selected to be either a uniaxial compressive strength testing machine or a CBR testing machine according to information sent from the computing device 11. The obtained strength measurement results are sent to the computing device 11.

[0040] The report creation process is performed by the report creation device 18. The calculation device 11 transmits information such as the physical properties of the test soil, the mixture conditions of the test specimen, and the strength of the test specimen to the report creation device 18. The report creation device 18 creates a report in accordance with the information transmitted from the calculation device 11. The report may be output on paper or distributed to electronic media.

[0041] The supervisor (including the client) can determine the amount of soil improvement material to be added to the area to be improved based on information such as the test specimen's composition conditions (amount of soil improvement material added) and strength of the test specimen in the prepared report.

[0042] According to the automatic evaluation device 10 of this embodiment configured as described above, the test soil, soil improvement material, and water measured by the automatic weighing device 14 based on the physical properties of the test soil and the target improvement values ​​of the soil improvement target area are automatically transported to the test specimen preparation device 15 to be used as test specimens in the calculation device 11, thereby reducing the burden on workers in the blending test. In addition, the calculation device 11 is used to set the blending conditions for multiple blends of test specimens, so highly accurate blending test results can be obtained.

[0043] The automated evaluation system 10 of this embodiment includes a physical property measuring device 12 that measures the wet density and moisture content of the test soil and inputs the obtained measurements into a calculation device 11, thereby further reducing the burden on the operator and enabling highly accurate mix setting. The automated evaluation system 10 of this embodiment also includes a classifying device 13 that classifies the test soil, adjusts the particle size of the test soil, and supplies it to an automatic weighing device, thereby further reducing the operator's burden. The automated evaluation system 10 of this embodiment can evaluate the strength of the test specimen using a uniaxial compressive strength tester and a CBR tester, allowing the target improvement value for the soil improvement target site to be set using either uniaxial compressive strength or CBR values, thereby enabling various soil improvement methods to be accommodated. Furthermore, the automated evaluation system 10 of this embodiment includes a test specimen preparation device 15 that can switch between the tapping method and the rammer method, allowing the test specimen to be prepared under optimal conditions for the test soil, thereby improving the accuracy of the mix test. Furthermore, the automated evaluation device 10 of this embodiment further includes a curing device 16 that cures the specimens prepared by the specimen preparation device 15 and transports the cured specimens to the specimen evaluation device 17. This automates the process from specimen preparation to specimen evaluation, further reducing the burden on the operator. Furthermore, the automated evaluation device 10 of this embodiment further includes a report creation device 18, further reducing the burden on the operator and eliminating errors due to data transcription errors. Furthermore, in the automated evaluation device 10 of this embodiment, the calculation device 11 includes an artificial intelligence processing unit that sets the blending conditions for multiple blends of specimens based on the physical properties of the test soil, the target improvement values ​​of the soil improvement target area, and the big data 4, thereby further improving the accuracy of the blending test.

[0044] According to the automatic evaluation method using the automatic evaluation device 10 of this embodiment, it is possible to obtain highly accurate results of the blending test because the above-mentioned automatic evaluation device 10 is used. Furthermore, a report can be obtained by storing test soil, soil improvement material, and water in the test soil tank 1, soil improvement material tank 2, and water tank 3 of the automatic evaluation device 10, respectively, and inputting the target improvement value of the soil improvement target area into the calculation device 11, thereby significantly reducing the burden on workers.

[0045] Although the embodiment of the present invention has been described above, the present invention is not limited to this and can be modified as appropriate within the scope of the technical idea of ​​the invention. For example, in the automatic evaluation device 10 of this embodiment, test soil, soil improvement material, and water are mixed together to prepare a test specimen, but the present invention is not limited to this. If the soil at the soil improvement target site contains a lot of moisture and water is not used at the soil improvement target site, there is no need to use water in the automatic evaluation device 10 either.

[0046] Furthermore, although the automatic evaluation device 10 of this embodiment measures the physical properties of the test soil using the physical property measuring device 12, the present invention is not limited to this. Instead of using the physical property measuring device 12, an operator may measure the physical properties of the test soil and input the obtained physical property values ​​into the calculation device 11.

[0047] Furthermore, although the automatic evaluation device 10 of this embodiment adjusts the particle size of the soil removed from the test soil tank 1 using the classification device 13, the classification work may be performed by an operator. Furthermore, the automatic evaluation device 10 of this embodiment has a curing device 16 that cures the specimen prepared in the specimen preparation device 15 and transports the cured specimen to the specimen evaluation device 17, but the work of transporting the specimen from the specimen preparation device 15 to the curing device 16 and the work of transporting the specimen from the curing device 16 to the specimen evaluation device 17 may be performed by an operator.

[0048] Although the automatic evaluation device 10 of this embodiment is configured to be compatible with both the uniaxial compressive strength test and the CBR test, it may be configured to be compatible with only one of them. Furthermore, although the specimen preparation device 15 of the automatic evaluation device 10 of this embodiment is configured to be compatible with both the tapping method and the rammer method, it may be configured to be compatible with only one of them. [Explanation of symbols]

[0049] 1 Test soil tank 2. Soil improvement material tank 3. Water tank 4. Big Data 10 Automatic evaluation equipment 11 Arithmetic unit 12 Physical property measuring equipment 13 Classifier 14 Automatic weighing device 15. Test specimen preparation equipment 16 Curing device 17. Test piece evaluation equipment 18 Report writing device

Claims

1. An automatic evaluation device for soil improvement material blending tests that uses test soil and soil improvement materials collected in advance from a soil improvement target site based on a target improvement value of the soil improvement target site, The apparatus includes a calculation device, an automatic weighing device, a specimen preparation device, and a specimen evaluation device, The calculation device sets the mixture conditions for a plurality of test specimens, each of which has a different amount of test soil and / or a different amount of added soil improvement material, based on the physical properties of the test soil and the target improvement value of the soil improvement target area, and transmits the information to the automatic weighing device. The automatic weighing device weighs the test soil and the soil improvement material based on the blending conditions of the multiple blends of the test specimens set by the arithmetic device, and transports them to the test specimen preparation device; The test specimen preparation device mixes the measured test soil and the soil improvement material, and shapes the resulting mixture to prepare the test specimens of multiple blends; The test specimen evaluation device is an automatic evaluation device for soil improvement material blending tests that evaluates test specimens of multiple blends.

2. The automatic evaluation device for blending tests using soil improvement materials as described in claim 1, wherein the physical properties of the test soil are wet density and water content, and further comprises a physical property measuring device that measures the wet density and water content of the test soil and transfers the obtained measurement data to the computing device.

3. 3. The automatic evaluation device for a blending test using a soil improvement material according to claim 1, further comprising a classifying device that classifies the test soil, adjusts the particle size of the test soil, and supplies the test soil to the automatic weighing device.

4. The classification device includes a test soil classifier for a uniaxial compressive strength test and a test soil classifier for a CBR test, The test specimen preparation device has a mold for forming a test specimen for a uniaxial compressive strength test and a mold for forming a test specimen for a CBR test, The specimen evaluation device includes a uniaxial compressive strength testing machine and a CBR testing machine, The automatic evaluation device for a mixing test using soil improvement materials as described in claim 3, wherein the calculation device selects either a uniaxial compressive strength test or a CBR test as the evaluation method for the test specimen, and transmits the information to the classification device, the test specimen preparation device, and the test specimen evaluation device.

5. The specimen preparation device can switch the specimen preparation method between a tapping method and a rammer method, 5. The automatic evaluation device for blending tests using soil improvement materials according to claim 1, wherein a mixture of the test soil and the soil improvement material having the same blend as that of the test specimen to be prepared is poured into a cylinder placed on a flow table, and the cylinder is pulled up vertically and removed, leaving only the mixture on the flow table. The device measures the flow value of the mixture by a flow test in accordance with JIS R 5201:2015 (Physical testing methods for cement), and selects the tapping method if the flow value is equal to or greater than a predetermined value, and selects the rammer method if the flow value is less than the predetermined value.

6. An automatic evaluation device for a blending test using a soil improvement material described in any one of claims 1 to 5, further comprising a curing device that cures the test specimen prepared by the test specimen preparation device and transports the cured test specimen to the test specimen evaluation device.

7. An automatic evaluation device for a blending test using a soil improvement material described in any one of claims 1 to 6, further comprising a report creation device that creates a report that describes the physical properties of the test soil, the blending of the test specimen, and the strength of the test specimen.

8. The calculation device has an artificial intelligence processing unit, and the artificial intelligence processing unit sets the mixing conditions of the test specimens with multiple mixtures based on the physical properties of the test soil, the target improvement value of the soil improvement target area, and big data. An automatic evaluation device for mixing tests using soil improvement materials described in any one of claims 1 to 7.

9. An automatic evaluation method using an automatic evaluation device for a blending test using the soil improvement material according to any one of claims 1 to 8, A step of inputting a target improvement value of the soil improvement target land into the arithmetic device; A setting process in which the computing device sets the mixing conditions for multiple test specimens with different amounts of the test soil and / or the amount of the soil improvement agent added based on the physical properties of the test soil and the target improvement value of the soil improvement target area, and transmits the information to the automatic weighing device. a weighing step in which the automatic weighing device weighs the test soil and the soil improvement material based on the blending conditions of the multiple blends of the test specimens set by the arithmetic device, and transports them to the test specimen preparation device; a test piece preparation step in which the test piece preparation device kneads the weighed test soil and the soil improvement material, and shapes the resulting mixture to prepare test pieces of a plurality of blends; an evaluation step in which the specimen evaluation device evaluates the specimens of multiple formulations.

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