A method and device for quickly estimating specific heat capacity of unsaturated soil

Abstract

The present invention provides a method for quickly estimating the specific heat capacity of unsaturated soil, which comprises: S1, measuring the moisture content of the soil to be tested; S2, determining the specific heat capacity information of the particle groups contained in the soil to be tested and the percentage information of each particle group in the total mass of the soil to be tested; S3, calculating the specific heat capacity of the soil to be tested based on the moisture content, the specific heat capacity information and the percentage information. The present invention simplifies the soil structure into soil particles of different particle groups and water. The mineral components contained in the soil of the same particle group in the same area are similar, and the specific heat capacity is also similar. Therefore, when the specific heat capacity of the soil of different particle groups in the area is determined, the specific heat capacity of the soil of different gradations in the area can be obtained by a simple geotechnical test using the calculation method proposed by the present invention, and it is no longer necessary to re-test the specific heat capacity for different soils. In addition, the test of the specific heat capacity of the sample can be converted into the test of the specific heat capacity of the soil of different particle groups, the sample volume is reduced, the sampling amount is small, and the test is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of soil analysis, in particular to a method and a device for quickly estimating the specific heat capacity of unsaturated soil. Background Art

[0002] Specific heat capacity refers to the energy required to absorb or release a unit mass of soil when its temperature rises or falls by 1°C. It is an indicator to measure the heat absorption or heat dissipation capacity of soil. At present, the specific heat capacity of soil is mainly measured by calorimetry, heating-cooling method, absolute calorimetry, etc.

[0003] The existing technology (Ye Hui. Research on Thermophysical Properties of Unsaturated Reticulated Red Soil [D]. Hefei University of Technology, 2019.) adopts the heating-cooling method, uses water as a standard sample, tests the soil as a whole, and calculates the specific heat capacity of the soil. However, it takes a long time, and commonly used soil specific heat testers such as differential scanning calorimeters are not common and inconvenient to carry, and different soils need to be tested.

[0004] There is also a method for estimating the specific heat capacity of soil in the prior art, which is to obtain an empirical formula for the moisture content or other soil parameters by regressing and fitting the measured data of the specific heat capacity of soil. However, most empirical formulas are only applicable to a certain type of soil, are not universal, and have low calculation accuracy; the weighted average formula also requires the specific heat capacity of the soil skeleton to be measured specifically, and even soils of different gradations composed of the same particle size category need to be retested for the specific heat capacity of the soil skeleton.

[0005] In view of the problems in the prior art, the present invention provides a method and device for quickly estimating the specific heat capacity of unsaturated soil. Summary of the invention

[0006] In order to solve the above problems of the prior art, the present invention provides a method for quickly estimating the specific heat capacity of unsaturated soil, the method comprising the following steps:

[0007] S1. Measure the moisture content of the soil to be tested;

[0008] S2, determining the specific heat capacity information of the particle groups contained in the soil to be tested and the percentage information of each particle group in the total mass of the soil to be tested;

[0009] S3. Calculate the specific heat capacity of the soil to be tested based on the moisture content, the specific heat capacity information and the percentage information.

[0010] According to one embodiment of the present invention, the particle group includes one or any combination of the following: boulder, pebble, coarse gravel, medium gravel, fine gravel, coarse sand, medium sand, fine sand, silt, and clay.

[0011] According to an embodiment of the present invention, the step S2 comprises: obtaining the specific heat capacity information corresponding to each particle group by calorimetry.

[0012] According to one embodiment of the present invention, step S2 comprises: obtaining quality information of each particle group through a screening test.

[0013] According to one embodiment of the present invention, the percentage information is calculated by the following formula:

[0014]

[0015] Among them, p i Indicates the percentage information of the soil with particle group i in the total mass of the soil to be tested; m i It represents the mass information of the soil with particle group i; m represents the total mass of the soil to be tested.

[0016] According to one embodiment of the present invention, the specific heat capacity of the soil to be tested is calculated by the following formula:

[0017]

[0018] Where C represents the specific heat capacity of the soil to be tested; C i represents the specific heat capacity information corresponding to the soil with particle group i; p i represents the percentage information of the soil with particle group i in the total mass of the soil to be tested; w represents the water content; C w Represents the specific heat capacity of water.

[0019] According to another aspect of the present invention, a storage medium is provided, which contains a series of instructions for executing the method steps as described in any one of the above.

[0020] According to another aspect of the present invention, there is also provided a device for quickly estimating the specific heat capacity of unsaturated soil, which executes a method for quickly estimating the specific heat capacity of unsaturated soil as described in any one of the above items, and the device comprises:

[0021] A moisture content module is used to measure the moisture content of the soil to be tested;

[0022] A percentage module is used to determine the specific heat capacity information of the particle groups contained in the soil to be tested and the percentage information of each particle group in the total mass of the soil to be tested;

[0023] A soil specific heat capacity module is used to calculate the soil specific heat capacity of the soil to be tested based on the water content, the specific heat capacity information and the percentage information.

[0024] According to an embodiment of the present invention, the percentage module calculates the percentage information by the following formula:

[0025]

[0026] Among them, p i Indicates the percentage information of the soil with particle group i in the total mass of the soil to be tested; m i It represents the mass information of the soil with particle group i; m represents the total mass of the soil to be tested.

[0027] According to one embodiment of the present invention, the soil specific heat capacity module calculates the soil specific heat capacity of the soil to be tested by the following formula:

[0028]

[0029] Where C represents the specific heat capacity of the soil to be tested; C i represents the specific heat capacity information corresponding to the soil with particle group i; p i represents the percentage information of the soil with particle group i in the total mass of the soil to be tested; w represents the water content; C w Represents the specific heat capacity of water.

[0030] The present invention provides a method and device for quickly estimating the specific heat capacity of unsaturated soil, which has the following advantages: The present invention simplifies the soil structure into soil particles of different particle groups and water. The soils of the same particle group in the same area have similar mineral components and similar specific heat capacities. Therefore, when the specific heat capacity of soils of different particle groups in the area is determined, the specific heat capacity of soils of different gradations in the area can be obtained by a simple geotechnical test using the calculation method proposed by the present invention, and there is no need to re-test the specific heat capacity of different soils. In addition, the test of the specific heat capacity of the sample can be converted into the test of the specific heat capacity of soils of different particle groups, the sample volume is reduced, the sampling amount is small, and the test is more convenient.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0033] Figure 1 A flow chart of a method for quickly estimating specific heat capacity of unsaturated soil according to an embodiment of the present invention is shown; and

[0034] Figure 2The structure block diagram of a device for quickly estimating specific heat capacity of unsaturated soil according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0036] The existing technology (Ye Hui. Research on Thermophysical Properties of Unsaturated Reticulated Red Soil [D]. Hefei University of Technology, 2019.) uses water as a standard sample. It is known that the specific heat capacity of water is 4.2 kJ / (kg·℃). The rock and soil sample heated to a specified temperature is placed in an insulation cylinder filled with a certain amount of water. Thermocouples for real-time temperature monitoring are inserted into the soil sample and water respectively. As the sample temperature drops and the water temperature rises, the temperature will eventually reach equilibrium. Its definition of specific heat capacity is: the heat required or released to increase or decrease the temperature of a unit mass of a substance by 1K (or 1℃), and the value is affected by the ambient temperature.

[0037] The mass is M 1 The test soil sample is heated to a specified temperature and placed in a heat preservation cylinder filled with a specified mass of water. The temperature drop of the sample is the process of heat loss. The heat loss per unit time (△Q / △t) is proportional to the temperature drop rate, and the following formula is obtained:

[0038]

[0039] The temperature of the water gradually rises, similar to the heat release process of the soil sample mentioned above. The heat gained per unit time (△Q / △t) is proportional to the temperature rise rate, and we can get

[0040]

[0041] Where C1 is the temperature of the sample at θ 1 The specific heat capacity of the sample at temperature θ 2 When the heat absorption and release process reaches equilibrium, record the constant temperature of water and sample. At this time, the specific heat capacity, mass and initial temperature of water and the mass and initial temperature of the sample are known, from which the specific heat capacity of the soil sample to be tested can be derived as follows:

[0042]

[0043] Where △T1 is the water temperature rise value; △T2 is the rock and soil sample temperature drop value.

[0044] However, the existing technology (Ye Hui. Research on Thermophysical Properties of Unsaturated Reticulated Red Soil [D]. Hefei University of Technology, 2019.) requires testing the entire soil, and the above-mentioned test process described in the prior art is time-consuming. The commonly used soil specific heat testers such as differential scanning calorimeters are not common and inconvenient to carry, and different soils need to be tested.

[0045] There is also a method for estimating the specific heat capacity of soil in the prior art. The experiment shows that the specific heat of soil has the property of weighted average according to the material composition of the soil, namely the mass of the soil skeleton and water (the content and specific heat of the gas phase filling in the soil are very small and can be ignored).

[0046]

[0047] Where, C is the specific heat capacity of soil; C d is the specific heat capacity of the soil skeleton, w is the mass water content, C w is the specific heat of water, taken as 4.18 kJ / (kg·℃).

[0048] The empirical formula for water content or other soil parameters is obtained by regression fitting the measured data of soil specific heat capacity:

[0049] C=0.1477w+2.6213

[0050] However, most of the empirical formulas in the prior art are only applicable to a certain type of soil, are not universal, and have low calculation accuracy; the weighted average formula also requires special measurement of the specific heat capacity of the soil skeleton. Even soils of different gradations composed of the same particle size category need to be retested for the specific heat capacity of the soil skeleton.

[0051] Figure 1 A flow chart of a method for quickly estimating specific heat capacity of unsaturated soil according to an embodiment of the present invention is shown.

[0052] like Figure 1 As shown, in step S101, the moisture content of the soil to be tested is measured.

[0053] like Figure 1 As shown, in step S102, the specific heat capacity information of the particle groups in the soil to be tested and the percentage information of each particle group in the total mass of the soil to be tested are determined. Specifically, the particle group includes one or any combination of the following: boulders, pebbles, coarse gravel, medium gravel, fine gravel, coarse sand, medium sand, fine sand, silt, and clay.

[0054] Furthermore, the particle size range of boulders is: d>200mm; the particle size range of pebbles is: 200≥d>60mm; the particle size range of coarse gravel is: 60≥d>20mm; the particle size range of medium gravel is: 20≥d>5mm; the particle size range of fine gravel is: 5≥d>2mm; the particle size range of coarse sand is: 2≥d>0.5mm; the particle size range of medium sand is: 0.5≥d>0.25mm; the particle size range of fine sand is: 0.25≥d>0.075mm; the particle size range of silt is: 0.075≥d>0.005mm; the particle size range of clay is: d<0.005mm.

[0055] In one embodiment, step S102 includes: obtaining specific heat capacity information corresponding to each particle group by calorimetry.

[0056] In one embodiment, step S102 includes: obtaining quality information of each particle group through a screening test.

[0057] Specifically, the percentage information is calculated using the following formula:

[0058]

[0059] Among them, p i Indicates the percentage of soil with particle group i in the total mass of the soil to be tested; m i It represents the mass information of the soil with particle group i; m represents the total mass of the soil to be tested.

[0060] like Figure 1 As shown, in step S103, the soil specific heat capacity of the soil to be tested is calculated based on the water content, specific heat capacity information and percentage information.

[0061] In one embodiment, the specific heat capacity of the soil to be tested is calculated by the following formula:

[0062]

[0063] Where C represents the specific heat capacity of the soil to be tested; C i represents the specific heat capacity information of the soil with particle group i; p i Indicates the percentage of the soil with particle group i in the total mass of the soil to be tested; w indicates the water content; C w Represents the specific heat capacity of water.

[0064] In practice, soil is a three-phase body consisting of soil skeleton, water and air. The mass of soil can be expressed by the following formula:

[0065] m=m d +m a +m w (1)

[0066] Where m represents the total mass of the soil to be tested, m d Represents the mass of the soil skeleton, m a Indicates the mass of air, m w Indicates the quality of water;

[0067] The mass of air in the soil to be tested is m a can be ignored, then (1) can be written as

[0068] m=m d +m w (2)

[0069] The soil skeleton is composed of particles of various particle groups. Assume that the mass of soil particles of different particle groups in the soil is m i , then the mass of the soil skeleton can be expressed as:

[0070] m d =Σm i (3)

[0071] The determination of the specific heat capacity of the soil to be tested in the present invention can be converted into the determination of the specific heat capacity of a small amount of soil particles of different particle groups through indoor tests, and the particle groups are divided in the following manner as shown in Table 1:

[0072] Table 1 Soil particle group classification

[0073] Serial number Particle group (i) division Particle size range d / mm 1 Boulder (rock) d>200 2 Pebbles (Crushed Stone) 200≥d>60 3 Coarse gravel 60≥d>20 4 Medium gravel 20≥d>5 5 Fine gravel 5≥d>2 6 coarse sand 2≥d>0.5 7 medium sand 0.5≥d>0.25 8 Fine sand 0.25≥d>0.075 9 Powder 0.075≥d>0.005 10 Clay d<0.005

[0074] The total mass of the soil to be tested can be written as:

[0075] m=Σm i +m w (4)

[0076] The specific heat capacity of soils with different particle groups in the soil area to be tested was measured by calorimetry, as shown in Table 2:

[0077] Table 2 Specific heat capacity of different particle groups

[0078] Serial number Particle group (i) division Specific heat 1 Boulder (rock) <![CDATA[C 1 ]]> 2 Pebbles (Crushed Stone) <![CDATA[C 2 ]]> 3 Coarse gravel <![CDATA[C 3 ]]> 4 Medium gravel <![CDATA[C 4 ]]> 5 Fine gravel <![CDATA[C 5 ]]> 6 coarse sand <![CDATA[C 6 ]]> 7 medium sand <![CDATA[C 7 ]]> 8 Fine sand <![CDATA[C 8 ]]> 9 Powder <![CDATA[C 9 ]]> 10 Clay <![CDATA[C 10 ]]>

[0079] Assuming that the specific heat capacity of the soil to be tested with a mass of m is C, there is the following relationship between C and the specific heat capacity of each particle group and the water content in the soil:

[0080] mC=Σm i C i +m w C w (5)

[0081]

[0082] Among them, C i(i is 1-10) represents the specific heat capacity of soils with different particle groups, which can be directly obtained by querying Table 2; therefore, for soils with different gradations, the present invention can quickly obtain the specific heat capacity of soils through the specific heat capacity of soils with the same regional particle group, C w is the specific heat capacity of water, which is taken as 4.18 kJ / (kg·℃).

[0083] Assume that the percentage of the mass of soil particles of different particle groups in the soil mass is:

[0084]

[0085] Among them, p i It indicates the percentage of soil with particle group i in the total mass of the soil to be tested.

[0086] Assuming that the moisture content of the soil is w, the simplified calculation formula for the specific heat capacity of the soil can be obtained according to equations (6) and (7), where C i It can be directly obtained by looking up Table 2, P i It can be obtained through a simple screening test. There is no need to repeat the specific heat capacity test for soils of different gradations in the same area, which saves the complicated and rigorous test process.

[0087]

[0088] Where C represents the specific heat capacity of the soil to be tested; C i represents the specific heat capacity information of the soil with particle group i; p i Indicates the percentage of the soil with particle group i in the total mass of the soil to be tested; w indicates the water content; C w Represents the specific heat capacity of water.

[0089] The method and device for quickly estimating the specific heat capacity of unsaturated soil provided by the present invention can also be used in conjunction with a computer-readable storage medium, on which a computer program is stored, and the computer program is executed to run a method for quickly estimating the specific heat capacity of unsaturated soil. The computer program can run computer instructions, and the computer instructions include computer program codes, which can be in source code form, object code form, executable file, or some intermediate form, etc.

[0090] Computer-readable storage media may include: any entity or device that can carry computer program code, recording media, USB flash drives, mobile hard disks, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0091] It should be noted that the content contained in computer-readable storage media can be appropriately increased or decreased based on the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, based on legislation and patent practices, computer-readable storage media do not include electrical carrier signals and telecommunications signals.

[0092] Figure 2 The structure block diagram of a device for quickly estimating specific heat capacity of unsaturated soil according to an embodiment of the present invention is shown.

[0093] like Figure 2 As shown, a device 200 for quickly estimating specific heat capacity of unsaturated soil includes: a moisture content module 201, a percentage module 202 and a soil specific heat capacity module 203.

[0094] Specifically, the moisture content module 201 is used to measure the moisture content of the soil to be tested; the percentage module 202 is used to determine the specific heat capacity information of the particle groups contained in the soil to be tested and the percentage information of each particle group in the total mass of the soil to be tested; the soil specific heat capacity module 203 is used to calculate the soil specific heat capacity of the soil to be tested based on the moisture content, specific heat capacity information and percentage information.

[0095] In one embodiment, the particle group includes one or any combination of the following: boulder, pebble, coarse gravel, medium gravel, fine gravel, coarse sand, medium sand, fine sand, silt, and clay.

[0096] Furthermore, the particle size range of boulders is: d>200mm; the particle size range of pebbles is: 200≥d>60mm; the particle size range of coarse gravel is: 60≥d>20mm; the particle size range of medium gravel is: 20≥d>5mm; the particle size range of fine gravel is: 5≥d>2mm; the particle size range of coarse sand is: 2≥d>0.5mm; the particle size range of medium sand is: 0.5≥d>0.25mm; the particle size range of fine sand is: 0.25≥d>0.075mm; the particle size range of silt is: 0.075≥d>0.005mm; the particle size range of clay is: d<0.005mm.

[0097] In one embodiment, the percentage module 202 includes: a first unit, which is used to obtain specific heat capacity information corresponding to each particle group by calorimetry.

[0098] In one embodiment, the percentage module 202 includes: a second unit, which is used to obtain quality information of each particle group through a screening test.

[0099] Specifically, the percentage module 202 calculates the percentage information using the following formula:

[0100]

[0101] Among them, pi Indicates the percentage of soil with particle group i in the total mass of the soil to be tested; m i It represents the mass information of the soil with particle group i; m represents the total mass of the soil to be tested.

[0102] In one embodiment, the soil specific heat capacity module 203 calculates the soil specific heat capacity of the soil to be tested by the following formula:

[0103]

[0104] Where C represents the specific heat capacity of the soil to be tested; C i represents the specific heat capacity information of the soil with particle group i; p i Indicates the percentage of the soil with particle group i in the total mass of the soil to be tested; w indicates the water content; C w Represents the specific heat capacity of water.

[0105] In summary, the method and device for quickly estimating the specific heat capacity of unsaturated soil provided by the present invention have the following advantages: the present invention simplifies the soil structure into soil particles of different particle groups and water. The soils of the same particle group in the same area have similar mineral components and similar specific heat capacities. Therefore, when the specific heat capacity of soils of different particle groups in the area is determined, the specific heat capacity of soils of different gradations in the area can be obtained through simple geotechnical tests using the calculation method proposed by the present invention, and there is no need to re-test the specific heat capacity of different soils. In addition, the test of the specific heat capacity of the sample can be converted into the test of the specific heat capacity of soils of different particle groups, the sample volume is reduced, the sampling amount is small, and the test is more convenient.

[0106] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0107] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0108] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0109] The "one embodiment" or "embodiment" mentioned in the specification means that the specific features, structures or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0110] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0111] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted for facilitating the understanding of the present invention and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A method for quickly estimating the specific heat capacity of unsaturated soil, characterized in that: There is no need to repeatedly test the specific heat capacity of soils with different gradations in the same area, which saves the complicated and strict test process. There is no need to repeatedly test the specific heat capacity of different soil skeletons. The method includes the following steps: S1. Measure the moisture content of the soil to be tested; S2. Determine the specific heat capacity information of the particle groups included in the soil to be tested and the percentage information of each particle group in the total mass of the soil to be tested, wherein the determination of the specific heat capacity of the soil to be tested can be converted into the determination of the specific heat capacity of soil particles of different particle groups through indoor tests, and the particle group includes one or any combination of the following: boulders, pebbles, coarse gravel, medium gravel, fine gravel, coarse sand, medium sand, fine sand, silt, and clay; S3. Calculate the specific heat capacity of the soil to be tested based on the moisture content, the specific heat capacity information and the percentage information; The specific heat capacity of the soil to be tested is calculated by the following formula: Where C represents the specific heat capacity of the soil to be tested; C i represents the specific heat capacity information corresponding to the soil with particle group i, measured by calorimetry; p i represents the percentage information of the soil with particle group i in the total mass of the soil to be tested, obtained through screening test; w represents the moisture content; C w It represents the specific heat capacity of water and is taken as 4.18 kJ / (kg·℃).

2. A method for quickly estimating specific heat capacity of unsaturated soil according to claim 1, characterized in that: The percentage information is calculated by the following formula: Among them, p i Indicates the percentage information of the soil with particle group i in the total mass of the soil to be tested; m i It represents the mass information of the soil with particle group i; m represents the total mass of the soil to be tested.

3. A storage medium, characterized in that: It contains a series of instructions for executing the method steps as claimed in any one of claims 1-2.

4. A device for quickly estimating the specific heat capacity of unsaturated soil, characterized in that: Executing a method for rapidly estimating specific heat capacity of unsaturated soil as claimed in any one of claims 1 to 2, the device comprising: A moisture content module is used to measure the moisture content of the soil to be tested; A percentage module is used to determine the specific heat capacity information of the particle groups contained in the soil to be tested and the percentage information of each particle group in the total mass of the soil to be tested; A soil specific heat capacity module is used to calculate the soil specific heat capacity of the soil to be tested based on the water content, the specific heat capacity information and the percentage information.

5. A device for quickly estimating specific heat capacity of unsaturated soil as claimed in claim 4, characterized in that: The percentage module calculates the percentage information by the following formula: Among them, p i Indicates the percentage information of the soil with particle group i in the total mass of the soil to be tested; m i It represents the mass information of the soil with particle group i; m represents the total mass of the soil to be tested.

6. A device for quickly estimating specific heat capacity of unsaturated soil as claimed in claim 4, characterized in that: The soil specific heat capacity module calculates the soil specific heat capacity of the soil to be tested by the following formula: Where C represents the specific heat capacity of the soil to be tested; C i represents the specific heat capacity information corresponding to the soil with particle group i; p i represents the percentage information of the soil with particle group i in the total mass of the soil to be tested; w represents the water content; C w Represents the specific heat capacity of water.

Images