JP2020134282A - Solidification material content measuring device, measuring method and measuring program - Google Patents

Abstract

To measure a solidification material content in object soil with high accuracy.SOLUTION: A solidification material content measuring device comprises: an initial temperature acquisition section 161 which acquires initial temperatures of hydrochloric acids 320 and 420 and respective object soils 300 and 400; a reaction temperature acquisition section 163 which acquires reaction temperatures M and V of the respective object soils 300 and 400 when agitated with agitators 30 and 35; regression analysis sections 164, 165 and 166 which determine a maximum temperature from the reaction temperature M obtained when the object soil 300 is mixed and agitated with the hydrochloric acid 320 and different amounts of a solidification material 340, calculate a temperature rise Q of the object soil 300 on the basis of the maximum temperature and the initial temperature, and form a regression formula from the temperature rise Q and a solidification material content S; and a content calculation section 167 which determines the maximum temperature from the reaction temperature V obtained when the object soil 400 for main measurement is mixed and agitated with the hydrochloric acid 420, calculates a temperature rise W of the object soil 400 for main measurement on the basis of the maximum temperature and the initial temperature, and calculates a solidification material content Y on the basis of the temperature rise W and the regression formula.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to a solidifying material content measuring device, a measuring method, and a measuring program.

Conventionally, in ground improvement work and the like, various techniques for measuring the solidifying material content (for example, cement content) of the target soil collected at the site have been proposed. As a technique of this type, for example, in Patent Document 1, hydrochloric acid is added to a target soil containing cement, and the cement content of the target soil is measured based on the temperature rise of the target soil due to the heat of reaction between the cement and hydrochloric acid. A technique using the hydrochloric acid dissolution method is disclosed.

Japanese Unexamined Patent Publication No. 08-054385

By the way, the heat of reaction between the solidifying material and hydrochloric acid is easily affected by the ambient temperature. Therefore, when the measurement based on the above-mentioned hydrochloric acid dissolution method is performed, for example, in a low temperature environment, the rise in the reaction temperature is suppressed to a low level, so that the solidifying material content is measured to be smaller than the actual content. There is.

An object of the present disclosure technique is to provide a measuring device, a measuring method, and a measuring program capable of measuring the solidified material content of the target soil with high accuracy.

The solidifying material content measuring device of the present disclosure obtains the hydrochloric acid added to the target soil and the target soil for the main measurement, and the initial temperature of the target soil and the target soil for the main measurement before the addition of the hydrochloric acid, respectively. A temperature acquisition unit, a stirrer capable of stirring at least the target soil to which the hydrochloric acid is added and the target soil for the main measurement, and the reaction temperature of the target soil and the target soil for the main measurement to be agitated by the stirrer. When the hydrochloric acid and different amounts of the solidifying material are added to at least two or more of the target soils and stirred by the stirrer, the reaction temperature is acquired by the reaction temperature acquisition unit. The maximum temperature is determined from the reaction temperature, the rising temperature of the target soil is calculated based on the maximum temperature and the initial temperature of the target soil, and the rising temperature and the solidifying material content of the target soil are subjected to regression analysis. The maximum temperature is obtained from the reaction temperature acquired by the reaction temperature acquisition unit when the hydrochloric acid is added to the soil to be measured and stirred by the stirrer, and the regression analysis unit that creates a regression equation by doing so. At the same time as determining, the rising temperature of the target soil for measurement is calculated based on the maximum temperature and the initial temperature of the target soil for measurement, and the solidifying material content is determined based on the rising temperature and the regression equation. It is characterized by including a content calculation unit for calculation.

Further, the initial temperature acquisition unit further acquires the initial temperature of water to be added to the target soil, and obtains the initial temperature.
The regression analysis unit sets the rising temperature of the two or more target soils to the maximum temperature of the two or more target soils, the hydrochloric acid acquired by the initial temperature acquisition unit, the two or more target soils, and the above. It is preferable to calculate based on each initial temperature of water.

Further, the regression analysis unit applies the initial temperature of the two or more target soils acquired by the initial temperature acquisition unit, the specific heat of the hydrochloric acid, the specific heat of the two or more target soils, and the two or more target soils. It is preferable to calculate the rising temperature of the two or more target soils by subtracting the pre-stirring temperature calculated based on the specific heat of the solidifying material to be added from the maximum temperature of the two or more target soils. ..

Further, it is preferable that at least the measurement unit including the stirrer and at least the regression analysis unit and the control unit including the content calculation unit are separately configured.

The method for measuring the content of the solidifying material of the present disclosure includes a first step of acquiring the initial temperature of the target soil to be added to the target soil and the target soil before the addition of the hydrochloric acid, and at least the initial temperature obtained in the first step. To the two or more target soils, the hydrochloric acid whose initial temperature was obtained in the first step and different amounts of the solidifying material are added and stirred, and the reaction temperatures of the two or more target soils to be stirred are measured. Then, based on the second step of determining the maximum temperature of the measured reaction temperature, the maximum temperature determined in the second step, and the initial temperature measured in the first step, the above two or more. The third step of creating a regression equation by calculating the rising temperature of the target soil and reverting the rising temperature and the solidifying material content of the target soil, the hydrochloric acid added to the target soil for measurement, and The fourth step of acquiring the initial temperature of the target soil for main measurement before the addition of hydrochloric acid, and the initial temperature of the target soil for main measurement for which the initial temperature was acquired in the fourth step were acquired in the fourth step. The fifth step of adding the hydrochloric acid and stirring, measuring the reaction temperature of the target soil for measurement to be stirred, and determining the maximum temperature from the measured reaction temperature, and the fifth step were determined. Based on the maximum temperature and the initial temperature measured in the fourth step, the rising temperature of the target soil for the main measurement is calculated, and the solidifying material content is calculated based on the rising temperature and the regression equation. It is characterized by including a sixth step of calculation.

In the measurement program of the present disclosure, the computer of the measuring device for measuring the solidified material content is added to the target soil and the target soil for the main measurement, and the target soil before the addition of the hydrochloric acid and the target soil for the main measurement. The initial temperature acquisition unit for acquiring the initial temperature, at least the target soil to which the hydrochloric acid is added, and the target soil for the main measurement are stirred by a stirrer, and the target soil and the target soil for the main measurement are stirred. When the hydrochloric acid and different amounts of solidifying material are added to at least two or more target soils and stirred by the stirrer, the reaction temperature acquisition unit acquires the reaction temperature of each of the above. The maximum temperature is determined from the reaction temperature to be obtained, the rising temperature of the target soil is calculated based on the maximum temperature and the initial temperature of the target soil, and the rising temperature and the solidifying material content of the target soil are calculated. A regression analysis unit that creates a regression equation by performing regression analysis, the maximum temperature from the reaction temperature acquired by the reaction temperature acquisition unit when the hydrochloric acid is added to the target soil for measurement and stirred by the stirrer. Is determined, the rising temperature of the target soil for measurement is calculated based on the maximum temperature and the initial temperature of the target soil for measurement, and the solidifying material content is calculated based on the rising temperature and the regression equation. It is characterized in that it functions as a content calculation unit that calculates.

According to the technique of the present disclosure, the solidifying material content of the target soil can be measured with high accuracy.

It is a schematic whole block diagram which shows the measuring apparatus which concerns on this embodiment. It is a schematic exploded perspective view of the measurement unit which concerns on this embodiment. It is a schematic diagram explaining the procedure of the calibration curve preparation test performed before this measurement test. It is a schematic diagram explaining the procedure of this measurement test. It is a schematic functional block diagram which shows the data processing part which concerns on this embodiment, and the related peripheral structure. (A) is a schematic diagram showing an example of an internal calibration curve graph, and (B) is a schematic diagram showing an example of an externally divided calibration curve graph. It is a figure explaining the flow of the method of measuring the solidifying material content which concerns on this embodiment.

Hereinafter, the solidifying material content measuring device, the measuring method, and the measuring program according to the present embodiment will be described with reference to the attached drawings. The same parts have the same reference numerals, and their names and functions are also the same. Therefore, detailed explanations about them will not be repeated.

[overall structure]
FIG. 1 is a schematic overall configuration diagram showing a measuring device 1 according to the present embodiment, and FIG. 2 is a schematic exploded perspective view of the measuring unit 10 according to the present embodiment.

As shown in FIG. 1, the measuring device 1 includes a measuring unit 10 and a control unit 100. The measurement unit 10 and the control unit 100 are preferably provided separately and are connected to each other via a cable 80 so as to be communicable with each other. The connection between the measurement unit 10 and the control unit 100 may be either wired or wireless.

[Measurement unit]
As shown in FIGS. 1 and 2, the measuring unit 10 includes a heat insulating container 11, a pedestal portion 12 that supports the heat insulating container 11, a stirrer main body 20 mounted on the upper surface of the pedestal portion 12, and a hydrochloric acid container. It includes 40 (see FIG. 1) and four temperature sensors 51, 52, 53, 54 (see FIG. 1).

The heat insulating container 11 is a bottomed tubular container having an open upper end, and accommodates the target soil to be measured. The heat-retaining container 11 preferably has a double-cylinder structure, so that the heat-retaining effect of the target soil contained therein can be obtained. The capacity of the heat insulating container 11 is about 300 mL, the height H is about 147 mm, and the opening diameter D is about 74 mm.

The pedestal portion 12 is formed of, for example, a corrosion-resistant vinyl chloride resin or the like in a substantially rectangular plate shape, and a substantially cylindrical support cylinder portion 13 (shown in FIG. 2) is provided at the substantially central portion thereof. There is. The inner diameter of the support cylinder portion 13 is formed to be substantially the same as the outer diameter of the heat insulating container 11, and the heat insulating container 11 is seated and supported by the pedestal portion 12 by fitting the heat insulating container 11 into the support cylinder portion 13. It has become so. A pair of positioning protrusions 14 and 15 projecting upward are provided at a predetermined portion of the pedestal portion 12 (near the corner portion in the illustrated example). The long side L1 of the pedestal portion 12 is about 200 mm, and the short side L2 is about 170 mm. The number of the positioning protrusions 14 and 15 is not limited to two in the illustrated example, and may be three or more.

The stirrer main body 20 is provided on the base portion 21, the strut portion 24 extending upward from the base portion 21, the grip portion 26 extending upward from the base portion 21 substantially parallel to the strut portion 24, and the upper portion of the strut portion 24. The lid 28, the stirring motor 30, and the stirring fins 35 are provided.

The base portion 21 is made of, for example, a corrosion-resistant vinyl chloride resin or the like and is formed in a substantially rectangular plate shape having substantially the same shape as the pedestal portion 12, and is seated on the upper surface of the pedestal portion 12. A through hole 21A (shown in FIG. 2) having a diameter larger than that of the heat insulating container 11 is provided in a substantially central portion of the base portion 21. Further, a pair of positioning holes 22 and 23 (shown in FIG. 2) are formed through the portions (near the corners in the illustrated example) corresponding to the positioning protrusions 14 and 15 of the base portion 21. When the stirrer body 20 is placed on the pedestal 12, the positioning protrusions 14 and 15 are inserted into the positioning holes 22 and 23 so that the stirrer body 20 can be easily aligned with the pedestal 12. It has become like. Regarding the arrangement of the positioning protrusions 14 and 15 and the positioning holes 22 and 23, the positioning holes may be arranged on the pedestal portion 12 side and the positioning projections may be arranged on the base portion 21 side.

The strut portion 24 is made of, for example, a corrosion-resistant vinyl chloride resin or the like, and is formed in a substantially cylindrical shape having a diameter larger than that of the heat insulating container 11 and the support cylinder portion 13 (shown in FIG. 2). Further, the height (axial length) of the support column portion 24 is formed to be longer than the height of the heat insulating container 11. Inside the support column 24, a heat insulating container 11 supported by the pedestal portion 12 is housed. The cylinder wall portion of the support column 24 is provided with a heat insulating container 11 housed inside and an opening window 25 for making the stirring fins 35 visible.

The grip portion 26 is made of, for example, a corrosion-resistant vinyl chloride resin or the like, and has a substantially cylindrical shape that is easy for an operator to grip. The lower end side of the grip portion 26 is fixed to the base portion 21, and the upper end side of the grip portion 26 is connected to the base portion 21 via a plate member 27. The grip portion 26 is erected in parallel with the support column portion 24 at a predetermined interval so that the operator can easily handle the stirrer main body portion 20 by gripping the grip portion 26. Has been done.

The lid portion 28 is formed of, for example, a corrosion-resistant vinyl chloride resin or the like in a disk shape having substantially the same diameter as the strut portion 24, and closes the upper end opening of the strut portion 24. A stirring motor 30 (a part of the stirrer of the present disclosure) is fixed to a substantially central portion of the upper surface of the lid portion 28 so that the output shaft protrudes into the strut portion 24. The stirring motor 30 is driven by electric power supplied from the battery 120 of the control unit 100, which will be described later, via the cable 80. When the measurement unit 10 and the control unit 100 are connected by wireless communication, a battery for the stirring motor 30 may be provided separately in the stirring machine main body 20.

A stirring rod 33 extending downward is integrally rotatably connected to the output shaft of the stirring motor 30. Further, a stirring fin 35 (a part of the stirrer of the present disclosure) is integrally rotatably fixed to the lower end of the stirring rod 33. When the stirrer main body 20 is placed on the pedestal portion 12 that supports the heat insulating container 11, the stirring fins 35 are inserted into the target soil in the heat insulating container 11. When the stirring motor 30 is driven in this state, the target soil in the heat insulating container 11 is stirred as the stirring fins 35 rotate.

In the present embodiment, the height H of the measuring unit 10 including the pedestal portion 12, the stirrer main body portion 20, and the stirring motor 30 is about 260 mm. The depth D of the measurement unit 10 is about 200 mm, which corresponds to the long side of the pedestal portion 12, and the width W of the measurement unit 10 is about 170 mm, which corresponds to the short side of the pedestal portion 12. That is, the entire measurement unit 10 is configured in a compact portable size that can be easily carried by an operator and can be easily carried to the site.

The four temperature sensors 51, 52, 53, 54 include a hydrochloric acid temperature sensor 51 (an example of an initial temperature acquisition unit), a soil temperature sensor 52 (an example of an initial temperature acquisition unit), and a water temperature sensor 53 (an example of an initial temperature acquisition unit). It is composed of an initial temperature acquisition unit) and a reaction heat temperature sensor 54 (an example of the reaction temperature acquisition unit). Each of these sensors 51 to 54 is electrically connected to the control unit 100, and the detected temperature is transmitted to the control unit 100 in real time. Of these sensors 51 to 54, at least the sensor portion of the hydrochloric acid temperature sensor 51 and the reaction heat temperature sensor 54 is coated with a resin in order to prevent corrosion by hydrochloric acid.

The reaction heat temperature sensor 54 is detachably provided with respect to the stirrer main body 20. Specifically, a sensor insertion hole 29 (shown in FIG. 2) through which the sensor portion of the heat of reaction temperature sensor 54 is inserted is formed through the lid portion 28 of the stirrer main body portion 20. The temperature sensor 54 for heat of reaction has a stirrer main body portion by inserting the sensor portion into the sensor insertion hole 29 and seating a base end portion having a diameter larger than that of the sensor portion on the peripheral edge of the sensor insertion hole 29 of the lid portion 28. Attached to 20. The sensor portion of the reaction heat temperature sensor 54 is inserted into the target soil in the heat insulating container 11 while being attached to the stirrer main body portion 20.

[Controller unit]
The control unit 100 includes an accommodation box 101, an input display panel 110, a battery 120 as a power source, a data processing unit 160, and an external storage device 170 such as an SD memory card or a USB memory. The battery 120 may be omitted if the control unit 100 includes a power plug (not shown) that can be connected to an external power supply device (for example, 100V).

The storage box 101 is, for example, a stainless steel box-shaped body having six surfaces closed in order to protect the battery 120, the data processing unit 160, the external storage device 170, etc. arranged inside, and an input display is displayed on the upper surface thereof. The panel 110 is attached. The height H of the storage box 101 is about 200 mm, the depth D is about 300 mm, and the width W is about 400 mm, and it is formed in a portable size that can be easily carried by an operator.

The input display panel 110 is a touch-operated display connected to the data processing unit 160. The input display panel 110 functions as an input device for inputting various information and instructions to the data processing unit 160, and also serves as a display device for displaying the input contents to the data processing unit 160 and the calculation result by the data processing unit 160. Also works. The input function of the input display panel 110 may be configured by a separate keyboard, mouse, or the like.

The data processing unit 160 is, for example, a processing device that performs calculations such as a computer, and is a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), an input port, and the like, which are connected to each other by a bus or the like. Equipped with an output port, etc., to execute a measurement program. Details of various arithmetic processes performed by the data processing unit 160 will be described later.

[Measurement test procedure]
Next, a calibration curve preparation test using the measuring device 1 according to the present embodiment and a test procedure of this measurement test will be described with reference to FIGS. 3 and 4. In the following, the target soil used for the calibration curve preparation test is simply referred to as "target soil 300", and the target soil used for this measurement test is referred to as "measurement target soil 400".

[Calibration curve preparation test]
FIG. 3 is a schematic diagram illustrating the procedure of the calibration curve preparation test performed before the main measurement test. In the calibration curve preparation test, the target soil 300 collected at the site and the solidifying material 340 actually used at the site (for example, cement that reacts with hydrochloric acid, lime, water glass, etc.) were used, and the target soil after addition of hydrochloric acid was used. This is a step of creating a calibration curve (for example, a first-order regression equation) by performing regression analysis of the rising temperature and the content of the solidifying material. To prepare the calibration curve, for example, for a plurality of test cases 1 to 5 shown in Table 1 below, hydrochloric acid 320, water 310, and solidifying material 340 are added to each target soil 300, and these are added and then stirred. This is performed by measuring the reaction temperature M of each target soil 300 at that time. In the present disclosure, in the calibration curve preparation test, preferably, the target soil 300 that does not contain the solidifying material 340 is collected and used at the site, but the target soil 300 includes the solidifying material 340 at the site. Do not rule out being.

As shown in FIG. 3A, in step 1, the soil temperature sensor 52 was attached to the target soil 300 before addition of hydrochloric acid collected at the site, and the water temperature sensor 53 was attached to water 310 before addition. The hydrochloric acid temperature sensor 51 is inserted into the hydrochloric acid (in the hydrochloric acid container 40) 320, and the initial temperature J of the target soil 300, the initial temperature I of the water 310, and the initial temperature L of the hydrochloric acid 320 are measured, respectively. The measurement of each initial temperature J, I, L is started by the operator pressing the "measurement start button" on the input display panel 110. The initial temperatures J, I, and L measured by the temperature sensors 51, 52, and 53 are transmitted to the data processing unit 160, which will be described in detail later.

Next, in step 2 shown in FIG. 3 (B), the amount of solidifying material H (g), the amount of water O (g), and the amount of soil N (g) shown in Table 1 above are collected and placed in the heat insulating container 11, preferably. , Target soil 300 → solidifying material 340 → water 310. For example, in the case of the test case 5, 10.0 g of the solidifying material, 9.0 g of water, and 81.0 g of soil are collected and placed in the heat insulating container 11. When the target soil 300, the solidifying material 340, and the water 310 are placed in the heat insulating container 11, the soil mass is preferably crushed by stirring with a spatula or the like.

Next, in step 3 shown in FIG. 3C, 100 mL of hydrochloric acid 320 packaged in the hydrochloric acid container 40 is added into the heat insulating container 11 and lightly mixed with a spatula or the like so that any lumps of soil are crushed. Here, since a specified amount of 100 mL of hydrochloric acid 320 is pre-packaged in the hydrochloric acid container 40, it is possible to omit the weighing work of the operator and improve the work efficiency and safety. Become.

Next, in step 4 shown in FIG. 3D, the heat insulating container 11 is set in the measuring unit 10, and the temperature sensor 54 for heat of reaction is inserted into the heat insulating container 11. After inserting the reaction heat temperature sensor 54, when the "stirring start button" of the input display panel 110 is pressed, the stirring motor 30 is driven to start the measurement of the reaction temperature M. After that, the same operation as in steps 1 to 4 is repeated for the other test cases 1 to 4. The determination of the maximum temperature M _Max of each test case 1 to 5, the calculation of the rising temperature Q, and the generation of the calibration curve graphs g1 and g2 are automatically processed by the data processing unit 160, which will be described in detail later.

[Main measurement test]
FIG. 4 is a schematic diagram illustrating the procedure of this measurement test. This measurement test is a test for measuring the solidified material content of the measurement target soil 400 collected at the site based on the calibration curve graphs g1 and g2 prepared in the above-mentioned calibration curve preparation test. Since the measurement result of the solidifying material content may be 0 (zero) in the measurement target soil 400 used in this measurement test, it does not matter whether or not the solidifying material is actually contained.

As shown in FIG. 4A, in step 1, the soil temperature sensor 52 was used for the measurement target soil 400 collected at the site, and the hydrochloric acid was used for hydrochloric acid (in the hydrochloric acid container 40) 420 before addition. Each of the temperature sensors 51 is inserted, and the initial temperature T of the target soil 400 for measurement and the initial temperature U of hydrochloric acid 420 are measured, respectively. The measurement of the initial temperatures T and U is started, for example, by the operator pressing the "measurement start button" on the input display panel 110. The initial temperatures T and U measured by the temperature sensors 51 and 52 are transmitted to the data processing unit 160 whose details will be described later.

Next, in step 2 shown in FIG. 4 (B), 100 g of the measurement target soil 400 was collected and placed in the heat insulating container 11, and 100 mL of hydrochloric acid 420 packaged in the hydrochloric acid container 40 was added into the heat insulating container 11. Then, lightly mix with a spatula or the like and crush any lumps of soil. Here, since the specified amount of 100 mL of hydrochloric acid 420 is pre-packaged in the hydrochloric acid container 40, it is possible to omit the weighing work of the operator and improve the work efficiency and safety. Become.

Next, in step 3 shown in FIG. 4C, the heat insulating container 11 is set in the measuring unit 10, and the temperature sensor 54 for heat of reaction is inserted into the heat insulating container 11. After inserting the reaction heat temperature sensor 54, when the "stirring start button" of the input display panel 110 is pressed, the stirring motor 30 is driven to start the measurement of the reaction temperature V. When the maximum temperature V _Max reaction temperature V is determined, the temperature increase W from highest-temperature V _Max is calculated, solidifying material amount Y is calculated based on a calibration curve graph g1, g2. The determination of the maximum temperature _VMax , the calculation of the rising temperature W, and the calculation of the solidifying material content Y are automatically processed by the data processing unit 160, which will be described in detail later.

[Data processing unit]
FIG. 5 is a schematic functional block diagram showing the data processing unit 160 and related peripheral configurations. By executing the measurement program, the data processing unit 160 includes an initial temperature acquisition unit 161, a storage unit 162, a reaction temperature acquisition unit 163, a maximum temperature determination unit 164 (a part of the regression analysis unit of the present disclosure), and an internal calibration curve generation. It functions as a device including a unit 165 (regression analysis unit of the present disclosure), an external calibration curve generation unit 166 (regression analysis unit of the present disclosure), and a solidifying material content calculation unit 167 (content calculation unit of the present disclosure).

When the operator presses the "measurement start button" on the display operation panel 110 in the procedure 1 of the calibration curve preparation test described above, the initial temperature acquisition unit 161 receives the target soil 300 from the temperature sensors 51, 52, 53. The initial temperature J, the initial temperature I of water 310, and the initial temperature L of hydrochloric acid 320 are obtained, respectively. Further, when the operator presses the "measurement start button" on the display operation panel 110 in the procedure 1 of the main measurement test described above, the initial temperature acquisition unit 161 receives the measurement target soil 400 from the temperature sensors 51 and 52. The initial temperature T and the initial temperature U of hydrochloric acid 420 are obtained, respectively. The initial temperatures J, I, L, T, and U acquired by the initial temperature acquisition unit 161 are transmitted to the storage unit 162.

The storage unit 162 stores the initial temperatures J, I, L, T, and U transmitted from the initial temperature acquisition unit 161, respectively. Further, the storage unit 162 stores the maximum temperatures M _Max and V _Max determined by the maximum temperature determination unit 164 in the above-mentioned calibration curve preparation test and the main measurement test, respectively. Further, the storage unit 162 has an internal calibration curve graph g1 generated by the internal calibration curve generation unit 165 and an external calibration curve generated by the external calibration curve generation unit 166 in the above-mentioned calibration curve creation test. Each graph g2 is stored. Further, the storage unit 162 stores the rising temperature W and the solidifying material content Y of the measurement target soil 400 calculated by the solidifying material content calculation unit 167 in the above-mentioned main measurement test, respectively. All or a part of these data stored in the storage unit 162 is also configured to be storable in the external storage device 170.

When the operator presses the "stirring start button" of the display operation panel 110 in the above-mentioned calibration curve preparation test or the main measurement test, the reaction temperature acquisition unit 163 drives the stirring motor 30 and each target soil 300. , 400 reaction temperatures M and V are acquired in real time by the reaction heat temperature sensor 54. The reaction temperatures M and V acquired by the reaction temperature acquisition unit 164 are transmitted in real time to the maximum temperature determination unit 164. The stirring motor 30 driven by the reaction temperature acquisition unit 163 is automatically stopped when the maximum temperature determination unit 164 determines the maximum temperatures M _Max and V _Max .

The maximum temperature determination unit 164 is based on the reaction temperatures M and V of the target soils 300 and 400 transmitted in real time from the reaction temperature acquisition unit 163 in the above-mentioned calibration curve preparation test or the main measurement test. The temperatures M _Max and V _Max are determined, respectively. Specifically, the reaction temperatures M and V of the target soils 300 and 400 to which hydrochloric acid is added and stirred increase with the passage of time as shown by reference numeral M (V) in FIG. 5, and the maximum temperature. When it reaches, it decreases thereafter. The maximum temperature determination unit 164 detects the point where the reaction temperature M (V) starts to drop, and acquires the maximum temperature value before the reaction temperature M (V) starts to drop, thereby obtaining these maximum temperatures M. _Max and V _Max are determined respectively. The maximum temperatures M _Max and V _Max determined by the maximum temperature determination unit 164 are transmitted to the storage unit 162.

The internal calibration curve generation unit 165 calculates the rising temperature Q and the solidifying material content S of each target soil 300 corresponding to the test cases 1 to 5 in Table 1 above, and regresses these to perform a first-order regression line. The formula (Y = aX + b) is obtained to generate an internally divided calibration curve graph g1 (see FIG. 6 (A)). Here, the internal division is the amount of solidifying material (kg / m3) contained in the solidified material mixed soil: 1 m3, and is mainly used for plant kneading and the like. Whether or not to select the internal division is configured so that the operator can select by pressing the "internal division selection button" on the input display panel 110. Hereinafter, the details of the procedure for generating the internal calibration curve graph g1 will be described.

First, the internal calibration curve generator 165 subtracts the temperature E before stirring from the maximum temperature M _Max for the rising temperature Q of each target soil 300 corresponding to the test cases 1 to 5 in Table 1 below (1). Calculate according to each.

Q = M _Max −E = M _Max − ((H × F × K) + (O × 4.2 × I) + (N × P × J) + (100 × G × L)) / ((H ×) F) + (O × 4.2) + (N × P) + (100 × G)) ・ ・ ・ (1)

In formula (1), the denominator of the temperature E before stirring is the heat capacity (J / ° C) of the target soil, hydrochloric acid, water, and solidifying material before stirring, and the molecule is the target soil, hydrochloric acid, water, and solidifying material before stirring. The amount of heat (J). I is the initial temperature of water (° C.), J is the initial temperature of soil (° C.), and L is the initial temperature of hydrochloric acid (° C.), which are the values obtained by each temperature sensor 51 to 53 in the calibration curve preparation test. .. H is the amount of solidifying material (g), O is the amount of water (g), and N is the amount of soil (g). F is the specific heat (J / g) of the solidifying material, and for example, 1.2 is preset as a default value. The specific heat F of the solidifying material may be set to an arbitrary value. K is the solidifying material temperature (° C.), and for example, 20 (° C.) is preset as a default value. The solidifying material temperature K may be set to an arbitrary value. G is the specific heat of hydrochloric acid (J / mL), and 2.9 is preset as a default value. The specific heat G of hydrochloric acid may be set to an arbitrary value. P is the specific heat (J / g) of the soil, and is obtained from a mathematical formula (P = 0.8 × 100 / (100 + A) + 4.2 × A / (100 + A)) including the water content ratio A (%) of the soil. For the water content ratio A (%), for example, a known value from the Japanese Geotechnical Society may be used.

Next, the internal calibration curve generation unit 165 calculates the solidifying material content S of each target soil 300 according to the following mathematical formula (2).

S = H × 1000 / (H / C + N × 100 / (100 + A) / B + N × A / (100 + O)) ・ ・ ・ (2)

In the formula (2), the solidifying material amount H (g), the soil amount N (g), the water amount O (g), and the water content ratio A (%) are the same as those in the formula (1). B is the particle density (g / cm3) of the soil, and for example, a known value of the Japanese Geotechnical Society or the like may be used. C is the particle density (g / cm3) of the solidifying material, and for example, in the case of blast furnace cement, 3.05 is preset. Since it is possible to use special cement, the particle density C of the solidifying material may be set to an arbitrary value.

The internal division calibration curve generation unit 165 has the horizontal axis (X axis) for the rising temperatures Q1 to Q5 calculated according to the above formula (1) and the vertical axis (Y) for the solidifying material contents S1 to S5 calculated according to the above formula (2). Axis), and by performing regression analysis on these, the first-order regression linear equation (Y = aX + b) is obtained, and the internally divided calibration curve graph g1 (see FIG. 6 (A)) is generated, and the temporary regression linear equation (Y) is generated. = AX + b) The square of the correlation coefficient (R ² ) is calculated. These in split calibration graph g1, primary regression line equation (Y = aX + b) and, of the correlation coefficient squared ^{(R 2),} as well is stored in the storage unit 162, is displayed on the display operation panel 110.

If any of the rising temperatures Q1 to Q5 and the solidifying material contents S1 to S5 deviate significantly from the straight line of the internal calibration curve graph g1, the procedure shown in FIG. 3 above shows the corresponding test cases 1 to 5. The measurement should be repeated according to the above. If the square of the correlation coefficient (R ² ) deviates from the desired value, the calibration curve preparation test may be repeated according to the procedure shown in FIG.

The external calibration curve generator 166 calculates the rising temperature Q and the solidifying material content S of each target soil 300 corresponding to the test cases 1 to 5 in Table 1 above, and regresses these to perform a first-order regression line. The formula (Y = a'X + b) is obtained to generate an external calibration curve graph g2 (see FIG. 6B). Here, the outer split is the amount of solidifying material (kg / m3) added to the raw soil: 1 m3, and is mainly used in the in-situ stirring method. Whether or not to select the external allocation is configured so that the operator can select by pressing the "external allocation selection button" on the input display panel 110. The details of the procedure for generating the external calibration curve graph g2 will be described below.

First, the external calibration curve generator 166 subtracts the temperature E before stirring from the maximum temperature M _Max for the rising temperature Q of each target soil 300 corresponding to the test cases 1 to 5 in Table 1 above (1). Calculate according to each.

Next, the external calibration curve generation unit 166 calculates the solidifying material content S of each target soil 300 according to the following mathematical formula (3).

S = H × 1000 / N × Z ・ ・ ・ (3)

In the formula (3), the solidifying material amount H (g) and the soil amount N (g) are the same as those in the formula (1) or (2). Z (g / cm3) is the wet density of the ground, and for example, a known value of the Japanese Geotechnical Society may be used.

The external calibration curve generation unit 166 has the horizontal axis (X axis) for the rising temperatures Q1 to Q5 calculated according to the above formula (1) and the vertical axis (Y) for the solidifying material contents S1 to S5 calculated according to the above formula (3). Axis), and by performing regression analysis on these, the first-order regression linear equation (Y = a'X + b) is obtained, and the external calibration curve graph g2 (see FIG. 6 (B)) is generated, and the temporary regression linear equation is generated. Calculate the square (R ² ) of the correlation coefficient of (Y = a'X + b). These outer split calibration curve graph g2, primary regression line equation (Y = a'X + b) and the square of the correlation coefficient ^{(R 2),} as well is stored in the storage unit 162, is displayed on the display operation panel 110.

If any of the rising temperatures Q1 to Q5 and the solidifying material contents S1 to S5 deviate significantly from the straight line of the external calibration curve graph g2, the procedure shown in FIG. 3 above shows the corresponding test cases 1 to 5. The measurement should be repeated according to the above. If the square of the correlation coefficient (R ² ) deviates from the desired value, the calibration curve preparation test may be repeated according to the procedure shown in FIG.

The solidifying material content calculation unit 167 is a measurement target after stirring based on the initial temperature T of the measurement target soil 400 and the initial temperature U of hydrochloric acid 420 measured in the above-mentioned main measurement test (see FIG. 4). The rising temperature W of the soil 400 to be measured is calculated according to the following mathematical formula (4), which is obtained by subtracting the pre-stirring temperature E'from the maximum temperature V _{Max of the} soil 400.

W = V _Max −E'= V _Max − ((100 × P × T) + (100 × G × U)) / ((100 × P) + (100 × G)) ... (4)

In the formula (4), the specific heat P (J / g) of soil and the specific heat G (J / mL) of hydrochloric acid are the same as those of the above formula (1), and the description thereof will be omitted.

The solidifying material content calculation unit 167 uses the internal division calibration curve graph g1 for internal division and external division for external division based on the rising temperature W of the measurement target soil 400 calculated according to the above formula (4). By referring to the calibration curve graph g2 and reading the value on the Y-axis corresponding to the rising temperature W on the X-axis, the solidifying material content Y of the soil 400 for measurement is automatically calculated. The solidifying material content Y calculated by the solidifying material content calculating unit 167 is displayed on the input display panel 110 and stored in the storage unit 162.

Next, the flow of the method for measuring the solidifying material content according to the present embodiment will be described with reference to FIG. 7.

In step S10, the inner division or the outer division is selected. If it is an internal split, the process proceeds to step S20, and if it is an external split, the process proceeds to step S40.

If the process proceeds to step S20, that is, if it is an internal division, the following condition values are input from the display operation panel 110.
(1) Soil water content ratio A
(2) Soil particle density B
(3) Particle density C of solidifying material
(4) Specific heat F of solidifying material
(5) Specific heat G of hydrochloric acid
(6) Specific heat of soil P
(7) Amount of solidifying material H
(8) Soil volume N
(9) Amount of water O
(10) Amount of solidifying material K

If the process proceeds to step S40, that is, if it is an external split, the following condition values are input from the display operation panel 110.
(1) Soil water content ratio A
(2) Soil particle density B
(3) Particle density C of solidifying material
(4) Specific heat F of solidifying material
(5) Specific heat G of hydrochloric acid
(6) Specific heat of soil P
(7) Amount of solidifying material H
(8) Soil volume N
(9) Amount of water O
(10) Amount of solidifying material K
(11) Wet density Z of the ground

Next, in step S21 and step S41 (first step of the present disclosure), the initial temperature J of the target soil 300, the initial temperature I of water 310, and the initial temperature L of hydrochloric acid 320 are measured.

Next, in step S22 and step S42 (second step of the present disclosure), water 310, a solidifying material 340, and hydrochloric acid 320 are added to the target soil 300 to drive the stirring motor 30 and for heat of reaction. The reaction temperature M is measured by the temperature sensor 54, and the maximum temperature M _Max of the reaction temperature M is determined.

Next, in step S23 and step S43 (third step of the present disclosure), the initial temperatures J, I, L of the target soil 300, water 310, and hydrochloric acid 320, and the specific heats P and G of soil 300 and hydrochloric acid 320 are used. By calculating the pre-stirring temperature E and subtracting the pre-stirring temperature E from the maximum temperature M _Max , the rising temperature Q of the target soil 300 is calculated, and the rising temperature Q and the solidifying material content S of the target soil 300 are calculated. Calibration curve graphs g1 and g2 are generated by regression analysis.

Next, in step S24 and step S44 (fourth step of the present disclosure), the initial temperature T of the measurement target soil 400 and the initial temperature U of hydrochloric acid 420 are measured.

Next, in step S25 and step S45 (fifth step of the present disclosure), hydrochloric acid 420 is added to the measurement target soil 400 to drive the stirring motor 30, and the reaction temperature V is driven by the reaction heat temperature sensor 54. Is measured, and the maximum temperature V _Max of the reaction temperature V is determined.

Finally, in steps S26 and S46 (sixth step of the present disclosure), the initial temperatures T and U of the measurement target soil 400 and hydrochloric acid 420, and the specific heats P and G of the measurement target soil 400 and hydrochloric acid 420 are set. 'calculates the stirring temperature before E from the highest temperature V _Max' stirring temperature before E based by subtracting, calculates the temperature rise W of the measurement target earth 400, a calibration value corresponding to the temperature rise W By reading from the line graphs g1 and g2, the solidifying material content Y of the target soil 400 for measurement is automatically calculated, and the measurement is completed. In principle, the calibration curve preparation test according to steps S20 to S23 and steps S40 to 43 described above is performed only once until a large change occurs in the measurement environment (for example, air temperature) or the soil quality at the site. During that time, the measurement test according to steps S24 to S26 and steps S44 to 46 can be repeated.

According to the present embodiment described in detail above, in the calibration line preparation test, the initial temperatures J, I, and L of the target soil 300, water 310, and hydrochloric acid 320 are measured in advance, and these initial temperatures J, I, and L are the targets. The pre-stirring temperature E is calculated based on the specific heats P, G, and F of the soil 300, hydrochloric acid 320, and the solidifying material 340, and the maximum temperature when the solidifying material 340 and hydrochloric acid 320 are added to the target soil 300 and stirred. By subtracting the pre-stirring temperature E from M _Max, the rising temperature Q of the target soil 300 is calculated. Further, in this measurement test, the initial temperatures T and U of the measurement target soil 400 and the hydrochloric acid 420 are measured in advance, and these initial temperatures T and U and the specific heats P and G of the measurement target soil 400 and the hydrochloric acid 420 are set. The pre-stirring temperature E'is calculated based on this, and the rising temperature W of the measurement target soil 400 is calculated by subtracting the pre-stirring temperature _E'from the maximum temperature V _Max when hydrochloric acid 420 is added and stirred. It is configured in. This makes it possible to calculate the rising temperatures Q and W of each target soil 300 and 400 in consideration of the influence of the ambient temperature, and the calibration curve graphs g1 and g2 can be calculated even in a low temperature environment or a high temperature environment. The production accuracy can be improved, and further, the measurement accuracy of the solidifying material content Y can be effectively improved.

Further, since the measurement unit 10 using hydrochloric acid and the control unit 100 including the data processing unit 160 and the like which are vulnerable to corrosion are separately configured, the data processing unit 160 and the like are corroded by hydrochloric acid and cause a failure. It can be effectively prevented.

In addition, by making the measurement unit 10 and the control unit 100 a compact and portable size that can be easily carried by the operator, it is easy to carry them in to the site, secure an installation space, and even carry them out from the site. Efficiency can be reliably improved.

Further, by forming the measuring unit 10 using hydrochloric acid with a corrosion-resistant vinyl chloride resin or the like, the frequency of maintenance and the maintenance cost can be effectively reduced.

Further, by pre-packaging the hydrochloric acid 320 and 420 to be added to the target soils 300 and 400 in the hydrochloric acid container 40, it is possible to omit the weighing work of the operator and improve the work efficiency and safety. be able to.

It should be noted that the present disclosure is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the gist of the present disclosure.

For example, the calculation formulas for the rising temperatures Q and W and the solidifying material content Y are not limited to the above formulas (1) to (4), and other formulas, model formulas, and the like may be used. Further, the application of the present disclosure is not limited to cement and lime, and can be widely applied to other solidifying materials capable of reacting with hydrochloric acid.

1 Measuring device 10 Measuring unit 11 Heat insulation container 12 Pedestal part 20 Stirrer body 21 Base part 24 Strut part 26 Grip part 28 Lid part 30 Stirring motor 35 Stirring fin 40 Hydrochloric acid container 51 Hydrochloric acid temperature sensor 51
52 Soil temperature sensor 53 Water temperature sensor 54 Reaction heat temperature sensor 100 Control unit 101 Storage box 110 Input display panel 120 Battery 160 Data processing unit 161 Initial temperature acquisition unit 162 Storage unit 163 Reaction temperature acquisition unit 164 Maximum temperature determination unit 165 Internal calibration curve generator 166 External calibration curve generator 167 Solidifying material content calculation unit 170 External storage device

Claims (6)

An initial temperature acquisition unit that acquires hydrochloric acid added to the target soil and the target soil for the main measurement, and the initial temperatures of the target soil and the target soil for the main measurement before the addition of the hydrochloric acid, respectively.
A stirrer capable of stirring at least the target soil to which the hydrochloric acid has been added and the target soil for the present measurement, respectively.
A reaction temperature acquisition unit that acquires the reaction temperatures of the target soil and the target soil for measurement, which are agitated by the stirrer, respectively.
The maximum temperature is determined from the reaction temperature acquired by the reaction temperature acquisition unit when the hydrochloric acid and different amounts of the solidifying material are added to at least two or more target soils and stirred by the stirrer. Regression analysis for creating a regression equation by calculating the rising temperature of the target soil based on the maximum temperature and the initial temperature of the target soil, and performing regression analysis of the rising temperature and the solidifying material content of the target soil. Department and
The maximum temperature is determined from the reaction temperature acquired by the reaction temperature acquisition unit when the hydrochloric acid is added to the soil to be measured and stirred by the stirrer, and the maximum temperature and the object to be measured are measured. It is characterized by including a content calculation unit that calculates the rising temperature of the target soil for measurement based on the initial temperature of the soil and calculates the solidifying material content based on the rising temperature and the regression equation. A device for measuring the content of solidifying material. The initial temperature acquisition unit further acquires the initial temperature of water to be added to the target soil.
The regression analysis unit sets the rising temperature of the two or more target soils to the maximum temperature of the two or more target soils, the hydrochloric acid acquired by the initial temperature acquisition unit, the two or more target soils, and the above. The solidifying material content measuring device according to claim 1, which is calculated based on each initial temperature of water. The regression analysis unit adds the initial temperature of the two or more target soils acquired by the initial temperature acquisition unit, the specific heat of the hydrochloric acid, the specific heat of the two or more target soils, and the two or more target soils. Claim 1 or 2 for calculating the rising temperature of the two or more target soils by subtracting the pre-stirring temperature calculated based on the specific heat of the solidifying material from the maximum temperature of the two or more target soils, respectively. The measuring device for the solidifying material content described in 1. The solidifying material according to any one of claims 1 to 3, wherein at least the measuring unit including the stirrer, at least the regression analysis unit, and the control unit including the content calculation unit are separately configured. Content measuring device. Hydrochloric acid to be added to the target soil, and the first step of acquiring the initial temperature of the target soil before the addition of hydrochloric acid, and
To at least two or more target soils whose initial temperature was obtained in the first step, the hydrochloric acid whose initial temperature was obtained in the first step and different amounts of solidifying material are added and stirred, and the mixture is stirred. The second step of measuring the reaction temperature of two or more target soils and determining the maximum temperature of the measured reaction temperature, and
Based on the maximum temperature determined in the second step and the initial temperature measured in the first step, the rising temperature of the two or more target soils is calculated, and the rising temperature and the target soil are calculated. The third step of creating a regression equation by regression analysis of the solidifying material content, and
Hydrochloric acid to be added to the target soil for measurement, and the fourth step of acquiring the initial temperature of the target soil for measurement before the addition of hydrochloric acid, and
The hydrochloric acid whose initial temperature was obtained in the fourth step is added to the measurement target soil whose initial temperature was obtained in the fourth step and stirred, and the reaction temperature of the measurement target soil to be stirred is measured. The fifth step of measuring and determining the maximum temperature from the measured reaction temperature,
Based on the maximum temperature determined in the fifth step and the initial temperature measured in the fourth step, the rising temperature of the target soil for the present measurement is calculated, and the rising temperature and the regression equation are used. A method for measuring the solidifying material content, which comprises a sixth step of calculating the solidifying material content based on the above. A computer for measuring equipment that measures the content of solidifying material,
An initial temperature acquisition unit that acquires hydrochloric acid added to the target soil and the target soil for the main measurement, and the initial temperatures of the target soil and the target soil for the main measurement before the addition of the hydrochloric acid, respectively.
A reaction temperature acquisition unit that agitates at least the target soil to which hydrochloric acid has been added and the target soil for main measurement with a stirrer, and acquires the reaction temperatures of the target soil for measurement and the target soil for main measurement to be agitated.
The maximum temperature is determined from the reaction temperature acquired by the reaction temperature acquisition unit when the hydrochloric acid and different amounts of the solidifying material are added to at least two or more target soils and stirred by the stirrer. Regression analysis for creating a regression equation by calculating the rising temperature of the target soil based on the maximum temperature and the initial temperature of the target soil, and performing regression analysis of the rising temperature and the solidifying material content of the target soil. Department,
The maximum temperature is determined from the reaction temperature acquired by the reaction temperature acquisition unit when the hydrochloric acid is added to the soil to be measured and stirred by the stirrer, and the maximum temperature and the object to be measured are measured. It is characterized by functioning as a content calculation unit that calculates the rising temperature of the target soil for this measurement based on the initial temperature of the soil and calculates the solidifying material content based on the rising temperature and the regression equation. Measurement program.

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