CN111380906A - Refinement method for converting phase change latent heat of frozen soil into equivalent specific heat - Google Patents

Refinement method for converting phase change latent heat of frozen soil into equivalent specific heat Download PDF

Info

Publication number
CN111380906A
CN111380906A CN202010234198.5A CN202010234198A CN111380906A CN 111380906 A CN111380906 A CN 111380906A CN 202010234198 A CN202010234198 A CN 202010234198A CN 111380906 A CN111380906 A CN 111380906A
Authority
CN
China
Prior art keywords
temperature
frozen soil
formula
heat
soil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010234198.5A
Other languages
Chinese (zh)
Other versions
CN111380906B (en
Inventor
陈之祥
郭晓霞
邵龙潭
李顺群
高凌霞
田筱剑
张翻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dalian University of Technology
Original Assignee
Dalian University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dalian University of Technology filed Critical Dalian University of Technology
Priority to CN202010234198.5A priority Critical patent/CN111380906B/en
Publication of CN111380906A publication Critical patent/CN111380906A/en
Application granted granted Critical
Publication of CN111380906B publication Critical patent/CN111380906B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00Investigating or analyzing materials by the use of thermal means
    • G01N25/20Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00Investigating or analyzing materials by the use of thermal means
    • G01N25/005Investigating or analyzing materials by the use of thermal means by investigating specific heat
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10Complex mathematical operations
    • G06F17/18Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Data Mining & Analysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Chemical & Material Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Computational Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Pure & Applied Mathematics (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Operations Research (AREA)
  • Probability & Statistics with Applications (AREA)
  • Algebra (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Databases & Information Systems (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Bioinformatics & Computational Biology (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Evolutionary Biology (AREA)

Abstract

A refinement method for converting the phase change latent heat of frozen soil into equivalent specific heat is characterized in that the change rate of the unfrozen water content and the phase change latent heat of the frozen soil are determined by a calculus method through fitting a change curve of the unfrozen water content along with the temperature of the frozen soil; on the basis, a curve equation of the transformation latent heat to specific heat to phase change along with the temperature change is determined by assuming that a transformation latent heat to specific heat curve of the phase change is parallel to a change curve of the unfrozen water content along with the frozen soil temperature, and then the transformation latent heat to specific heat of any temperature point is determined. The method considers the correlation between the latent heat of phase change of the frozen soil and the content of unfrozen water, reflects the evolution trend of the phase change heat along with the negative temperature, reduces the test quantity of the soil samples at the intermediate temperature point, and improves the consistency evolution relation between the latent heat of phase change and the specific heat. The actual measurement and calculation show that the prediction accuracy of the calculation method is improved by 45.72% on average and can be improved by 189.7% to the maximum extent compared with the literature method. The most real equivalent specific heat value can be obtained to the maximum extent by improving the precision, and a basis is provided for the refined prediction of the frozen soil temperature field.

Description

Refinement method for converting phase change latent heat of frozen soil into equivalent specific heat
Technical Field
The invention belongs to the field of determination of calculation parameters of a frozen soil temperature field, and relates to a fine method for converting phase change latent heat of frozen soil into equivalent specific heat, which can be used for converting the phase change latent heat of the frozen soil into equivalent specific heat of a soil body.
Background
The heat propagation form in frozen earth is divided into sensible heat and latent heat. Sensible heat refers to the heat required by the temperature rise or decrease of frozen soil without phase change; for example, the soil body at 10 ℃ is raised to 15 ℃. Latent heat refers to the heat required for the melting of ice in frozen earth or the freezing of liquid water. In most cases, particularly under negative temperature conditions, both sensible and latent heat transfer modes exist in frozen earth. Influenced by the nonlinear change of the content of unfrozen water in the freezing and thawing process of the soil body, and the latent heat of phase change is changed along with the nonlinear change of the unfrozen water. Therefore, sensible heat and latent heat exist simultaneously in the process of lowering or raising the temperature of the frozen soil.
Generally, the specific heat of the mixture can be determined by adopting a mass weighted average calculation method, so that the specific heat of the frozen soil mixture can be directly determined on the premise that the compositions of various phases of the frozen soil and the specific heat value thereof are known. And sensible heat and latent heat in the frozen soil can be separately considered through latent heat calculation. In the conventional temperature field calculation software, only one latent heat release interval can be set, and the latent heat is evenly distributed to each section in the interval, which is inconsistent with the non-linear change of the unfrozen water content of the frozen soil with the negative temperature. Therefore, some studies try to convert the latent heat of the frozen soil into equivalent specific heat, and then substitute the equivalent specific heat into temperature field simulation software for calculation. For example, patent No. 2018105205434 discloses a method for calculating the phase change latent heat of frozen earth into equivalent specific heat, which is to divide the latent heat in a certain temperature interval by the length of the temperature interval as the average specific heat of the temperature interval, and then to take the weighted calculation value of the average specific heat of two adjacent intervals as the specific heat of the temperature points of the two adjacent intervals. The method is characterized in that the heat in the interval is averaged and does not accord with the nonlinear change of latent heat along with the temperature, and two unequal specific heat values exist at the temperature points of adjacent intervals, so that certain error exists in the calculation. Therefore, a refinement method for converting the phase change latent heat of the frozen soil into the equivalent specific heat is needed to be provided, so as to meet the actual phase change latent heat change of the frozen soil and improve the prediction precision of the temperature field.
Disclosure of Invention
The invention aims to provide a refining method for converting phase change latent heat of frozen soil into equivalent specific heat, so as to be beneficial to determining the equivalent specific heat of the frozen soil.
In order to achieve the purpose, the invention provides a refining method for converting the phase change latent heat of frozen soil into equivalent specific heat, which comprises the following steps:
1) fitting the mass percent content W of unfrozen water of frozen soiluThe change curve along with the frozen soil temperature T is in the form of a formula (1), and the formula (1) is as follows:
Wu=aebT+K (1)
in the formula, WuIs the content of unfrozen water of frozen soil in percentage by mass; a. b and K are fitting coefficients; e is a natural constant; t is the frozen soil temperature in units of;
2) obtaining the mass percent content W of the unfrozen water by respectively calculating the derivative of the frozen soil temperature T at two ends of the formula (1)uRate of change W with frozen soil temperature Tu', i.e.:
W′u=abebT(2)
in the formula, Wu' is the content W of unfrozen water in mass percentuRate of change with frozen soil temperature T; a. b is a fitting coefficient; e is a natural constant; t is the frozen soil temperature in units of;
3) the change dQ of the latent heat of the frozen soil is expressed by a formula (3), wherein the formula (3) is as follows:
Figure RE-GDA0002489092570000021
in the formula, dQ is the variation of the latent heat of the frozen soil, and the unit is kJ/kg; l is phase change heat of water, and the unit is kJ/kg; rhodIs the dry density of the soil sample in kg/m3(ii) a Rho is the density of the soil sample and has the unit of kg/m3(ii) a a. b is a fitting coefficient; e is a natural constant; dT is the temperature variation of the frozen soil, and the unit is;
4) the negative temperature interval [ Tn~Tj]Total amount of latent heat Q in segmentj~nExpressed as:
Figure RE-GDA0002489092570000022
in the formula, Qj~nIs a negative temperature interval [ Tn~Tj]The total latent heat in the section is kJ/kg, where 0 > Tj>Tn(ii) a L is phase transition heat of water, kJ/kg; rhodIs the dry density of the soil sample in kg/m3(ii) a Rho is the density of the soil sample and has the unit of kg/m3(ii) a a. b is a fitting coefficient; t isn、TjIs a negative temperature interval [ Tn~Tj]The boundary temperature of (c); e is a natural constant; dT is the frozen soil temperature variation in units of ℃.
5) Arranged in space with a curve CLThe mass percent of the water in the frozen soil is WuThe change curves along with the frozen soil temperature T are parallel, then the curve CLExpressed as:
CL=aebT+I (5)
in the formula, CLIs a curve in space; a. b is a fitting coefficient; e is a natural constant; i is a fitting constant; t is the frozen soil temperature in units of;
6) let equation (6) hold, equation (6) is:
Figure RE-GDA0002489092570000031
in the formula, Tn、TjIs a negative temperature interval [ Tn~Tj]In ° C, where 0 > Tj> Tn(ii) a a. b is a fitting coefficient; e is a natural constant; i is a fitting constant; t is the frozen soil temperature in units of; dT is the temperature variation of the frozen soil, and the unit is;
7) solving the value of I by using a formula (6), substituting I into a formula (5), and respectively enabling T to be TiWherein T isn<Ti<TjThen temperature interval [ Tn~Tj]Temperature point T in zoneiOrdinate C ofL(i)Can be determined, then CL(i)I.e. the temperature point TiThe phase change of (a) induces a latent heat equivalent specific heat value.
8) Frozen earth at temperature point TiThe equivalent specific heat C at that time is calculated by the formula (7), and the formula (7) is:
C=CL(i)+Csms+Cimi+Cwmw(7)
wherein C is frozen soil at temperature point TiThe equivalent specific heat in kJ/(kg. DEG C); cL(i)Is a temperature point TiThe phase change of (A) induces a latent heat equivalent specific heat value in kJ/(kg. DEG C); cs、Ci、CwThe specific heat values of soil particles, ice and water are respectively expressed in kJ/(kg DEG C); w is as、wi、wwRespectively frozen earth at temperature point TiThe mass percent ratio content of soil particles, ice and unfrozen water is expressed in unit.
According to the method, the true specific heat of the frozen soil can be converted into the equivalent specific heat of the frozen soil, and a foundation is laid for calculating the temperature field of the frozen soil.
The invention has the beneficial effects that: the provided method takes the correlation between the phase change latent heat of the frozen soil and the content of unfrozen water into consideration, reflects the evolution trend of the phase change heat along with negative temperature, reduces the test quantity of soil samples at intermediate temperature points, and improves the consistency evolution relation between the phase change latent heat and the specific heat. The actual measurement and calculation show that the prediction accuracy of the calculation method is improved by 45.72% on average compared with the literature method, and can be improved by 189.7% to the maximum extent. The most real equivalent specific heat value can be obtained to the maximum extent by improving the precision, and a basis is provided for the refined prediction of the frozen soil temperature field.
Drawings
FIG. 1 is a graph of temperature versus various parameters.
Detailed Description
A refinement method for converting the phase change latent heat of the frozen soil into the equivalent specific heat of the invention is described with reference to fig. 1.
The invention discloses a refinement method principle for converting phase change latent heat of frozen soil into equivalent specific heat, which comprises the following steps: determining the change rate of the unfrozen water content and the phase change latent heat of the frozen soil by a calculus method by fitting a change curve of the unfrozen water content along with the temperature of the frozen soil; on the basis, a curve equation of the transformation latent heat to specific heat to phase change along with the temperature change is determined by assuming that a transformation latent heat to specific heat curve of the phase change is parallel to a change curve of the unfrozen water content along with the frozen soil temperature, and then the transformation latent heat to specific heat of any temperature point is determined.
The invention provides a calculation method for converting phase change latent heat of frozen soil into equivalent specific heat, which comprises the following steps:
1) fitting the mass percent content W of unfrozen water of frozen soiluThe variation curve with the frozen soil temperature T is in the form of formula (8), as shown in FIG. 1, formula (8) is:
Wu=aebT+K (8)
in the formula, WuIs the content of unfrozen water of frozen soil in percentage by mass; a. b and K are fitting coefficients; e is a natural constant; t is the frozen soil temperature in units of;
2) the derivative of the frozen soil temperature T is respectively obtained at two ends of the formula (8), and the mass percent content W of the unfrozen water can be obtaineduRate of change W with frozen soil temperature Tu', i.e. that
W′u=abebT(9)
In the formula, Wu' is the content W of unfrozen water in mass percentuRate of change with frozen soil temperature T; a. b is a fitting coefficient; e is natureA constant; t is the frozen soil temperature in units of;
3) the change dQ of the latent heat of the frozen soil can be expressed by the formula (10), and the formula (10) is:
Figure RE-GDA0002489092570000051
in the formula, dQ is the variation of the latent heat of the frozen soil, and the unit is kJ/kg; l is phase change heat of water, and the unit is kJ/kg; rhodIs the dry density of the soil sample in kg/m3(ii) a Rho is the density of the soil sample and has the unit of kg/m3(ii) a a. b is a fitting coefficient; e is a natural constant; dT is the temperature variation of the frozen soil, and the unit is;
4) the negative temperature interval [ Tn~Tj](0>Tj>Tn) Total amount of latent heat Q in segmentj~nExpressed as:
Figure RE-GDA0002489092570000052
in the formula, Qj~nIs a negative temperature interval [ Tn~Tj](0>Tj>Tn) The total latent heat in the section is kJ/kg; l is phase transition heat of water, kJ/kg; rhodIs the dry density of the soil sample in kg/m3(ii) a Rho is the density of the soil sample and has the unit of kg/m3(ii) a a. b is a fitting coefficient; t isn、TjIs a negative temperature interval [ Tn~Tj](0>Tj>Tn) The boundary temperature of (c); e is a natural constant; dT is the frozen soil temperature variation in units of ℃.
5) Arranged in space with a curve CLThe mass percent of the water in the frozen soil is WuThe curves are parallel with the change of the frozen soil temperature T, and as shown in figure 1, the curve C isLCan be expressed as:
CL=aebT+I (12)
in the formula, CLIs a curve in space; a. b is a fitting coefficient; e is a natural constant; i is a fitting constant; t is the frozen soil temperature in units of;
6) let equation (13) hold, equation (13) is:
Figure RE-GDA0002489092570000053
in the formula, Tn、TjIs a negative temperature interval [ Tn~Tj](0>Tj>Tn) The boundary temperature of (c); a. b is a fitting coefficient; e is a natural constant; i is a fitting constant; t is the frozen soil temperature in units of; dT is the temperature variation of the frozen soil, and the unit is;
7) solving the value of I by using a formula (13), substituting I into a formula (12) and respectively enabling T to be Ti(Tn<Ti<Tj) Then temperature interval [ Tn~Tj]Temperature point T in zoneiOrdinate C ofL(i)Can be determined, then CL(i)I.e. the temperature point TiThe phase change of (a) induces a latent heat equivalent specific heat value.
8) Frozen earth at temperature point TiThe equivalent specific heat C at that time can be calculated by equation (14), equation (14) being:
C=CL(i)+Csms+Cimi+Cwmw(14)
wherein C is frozen soil at temperature point TiThe equivalent specific heat in kJ/(kg. DEG C); cL(i)Is a temperature point TiThe phase change of (A) induces a latent heat equivalent specific heat value in kJ/(kg. DEG C); cs、Ci、CwThe specific heat values of soil particles, ice and water are respectively expressed in kJ/(kg DEG C); w is as、wi、wwRespectively frozen earth at temperature point TiThe mass percent ratio content of soil particles, ice and unfrozen water is expressed in unit. According to the method, the true specific heat of the frozen soil can be converted into the equivalent specific heat of the frozen soil, and a foundation is laid for calculating the temperature field of the frozen soil.
Example (b): the dry density of the sample was 1.8g/cm using the method of the present application, the mass weighted average method and the method provided by the conventional transformation method (patent 2018105205434)3,dsIs 2.72The specific heat value of the saturated mealy clay is determined, and the calculation result is shown in table 1.
TABLE 1 calculation of the conversion of the latent heat of phase change of certain frozen soils into equivalent specific heat
Figure RE-GDA0002489092570000061
Calculated value C by comparison with the conventional transformation method in Table 1kAnd the calculation value of the refinement method for converting the phase change latent heat of the frozen soil into the equivalent specific heat is found to be improved by 45.72 percent and the maximum prediction precision is improved by 189.7 percent compared with the average prediction precision of the conventional method at the temperature of between 5 ℃ below zero and 20 ℃ below zero.
The above description is only for the purpose of illustration in conjunction with the present calculation process, and it will be apparent to those skilled in the art that various changes and modifications may be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. A refinement method for converting phase change latent heat of frozen soil into equivalent specific heat is characterized by comprising the following steps:
1) fitting the mass percent content W of unfrozen water of frozen soiluThe change curve along with the frozen soil temperature T is in the form of a formula (1), and the formula (1) is as follows:
Wu=aebT+K (1)
in the formula, WuIs the content of unfrozen water of frozen soil in percentage by mass; a. b and K are fitting coefficients; e is a natural constant; t is the frozen soil temperature in units of;
2) obtaining the mass percent content W of the unfrozen water by respectively calculating the derivative of the frozen soil temperature T at two ends of the formula (1)uRate of change W with frozen soil temperature Tu', i.e.:
W'u=abebT(2)
in the formula, Wu' is the content W of unfrozen water in mass percentuRate of change with frozen soil temperature T; a. b is a fitting coefficient; e is a natural constant; t is the temperature of the frozen soilThe position is as follows;
3) the change dQ of the latent heat of the frozen soil is expressed by a formula (3), wherein the formula (3) is as follows:
Figure FDA0002430418260000011
in the formula, dQ is the variation of the latent heat of the frozen soil, and the unit is kJ/kg; l is phase change heat of water, and the unit is kJ/kg; rhodIs the dry density of the soil sample in kg/m3(ii) a Rho is the density of the soil sample and has the unit of kg/m3(ii) a a. b is a fitting coefficient; e is a natural constant; dT is the temperature variation of the frozen soil, and the unit is;
4) the negative temperature interval [ Tn~Tj]Total amount of latent heat Q in segmentj~nExpressed as:
Figure FDA0002430418260000012
in the formula, Qj~nIs a negative temperature interval [ Tn~Tj]The total latent heat in the section is kJ/kg, where 0 > Tj>Tn(ii) a L is phase transition heat of water, kJ/kg; rhodIs the dry density of the soil sample in kg/m3(ii) a Rho is the density of the soil sample and has the unit of kg/m3(ii) a a. b is a fitting coefficient; t isn、TjIs a negative temperature interval [ Tn~Tj]The boundary temperature of (c); e is a natural constant; dT is the temperature variation of the frozen soil, and the unit is;
5) arranged in space with a curve CLThe mass percent of the water in the frozen soil is WuThe change curves along with the frozen soil temperature T are parallel, then the curve CLExpressed as:
CL=aebT+I (5)
in the formula, CLIs a curve in space; a. b is a fitting coefficient; e is a natural constant; i is a fitting constant; t is the frozen soil temperature in units of;
6) let equation (6) hold, equation (6) is:
Figure FDA0002430418260000021
in the formula, Tn、TjIs a negative temperature interval [ Tn~Tj]In ° C, where 0 > Tj>Tn(ii) a a. b is a fitting coefficient; e is a natural constant; i is a fitting constant; t is the frozen soil temperature in units of; dT is the temperature variation of the frozen soil, and the unit is;
7) solving the value of I by using a formula (6), substituting I into a formula (5), and respectively enabling T to be TiWherein T isn<Ti<TjThen temperature interval [ Tn~Tj]Temperature point T in zoneiOrdinate C ofL(i)Can be determined, then CL(i)I.e. the temperature point TiThe phase change of (a) induces a latent heat equivalent specific heat value;
8) frozen earth at temperature point TiThe equivalent specific heat C at that time is calculated by the formula (7), and the formula (7) is:
C=CL(i)+Csms+Cimi+Cwmw(7)
wherein C is frozen soil at temperature point TiThe equivalent specific heat in kJ/(kg. DEG C); cL(i)Is a temperature point TiThe phase change of (A) induces a latent heat equivalent specific heat value in kJ/(kg. DEG C); cs、Ci、CwThe specific heat values of soil particles, ice and water are respectively expressed in kJ/(kg DEG C); w is as、wi、wwRespectively frozen earth at temperature point TiThe mass percent ratio content of soil particles, ice and unfrozen water is expressed in unit;
according to the method, the true specific heat of the frozen soil can be converted into the equivalent specific heat of the frozen soil, and the temperature field of the frozen soil can be further researched.
CN202010234198.5A 2020-03-30 2020-03-30 Refinement method for converting phase change latent heat of frozen soil into equivalent specific heat Active CN111380906B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010234198.5A CN111380906B (en) 2020-03-30 2020-03-30 Refinement method for converting phase change latent heat of frozen soil into equivalent specific heat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010234198.5A CN111380906B (en) 2020-03-30 2020-03-30 Refinement method for converting phase change latent heat of frozen soil into equivalent specific heat

Publications (2)

Publication Number Publication Date
CN111380906A true CN111380906A (en) 2020-07-07
CN111380906B CN111380906B (en) 2021-08-17

Family

ID=71221855

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010234198.5A Active CN111380906B (en) 2020-03-30 2020-03-30 Refinement method for converting phase change latent heat of frozen soil into equivalent specific heat

Country Status (1)

Country Link
CN (1) CN111380906B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113533421A (en) * 2021-07-15 2021-10-22 安徽水安建设集团股份有限公司 Frozen soil heat conductivity coefficient test correction method

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5261490A (en) * 1991-03-18 1993-11-16 Nkk Corporation Method for dumping and disposing of carbon dioxide gas and apparatus therefor
US20040120772A1 (en) * 2001-10-24 2004-06-24 Vinegar Harold J. Isolation of soil with a low temperature barrier prior to conductive thermal treatment of the soil
US20110166843A1 (en) * 2007-08-24 2011-07-07 Sheng-Yuan Hsu Method For Modeling Deformation In Subsurface Strata
CN102135513A (en) * 2011-01-04 2011-07-27 刘波 Method for testing content of unfrozen water in frozen earth
CN104458430A (en) * 2014-11-05 2015-03-25 大连理工大学 Multifunctional unsaturated soil consolidation apparatus and test method
CN104792818A (en) * 2015-04-07 2015-07-22 河南大学 Method for calculating specific heat at clay freezing stage by performing energy substitution on phase-change latent heat of water in soil
CN105044147A (en) * 2015-07-10 2015-11-11 中国矿业大学 Near-phase change zone frozen soil thermal conductivity coefficient determination device and method
CN105241920A (en) * 2015-11-06 2016-01-13 天津城建大学 Method for determining content of unfrozen water in soil freezing process by using specific heat calculation
CN107966473A (en) * 2017-12-08 2018-04-27 天津城建大学 Model Permafrost Thermal calculation method of parameters based on the theory of similarity
CN108549617A (en) * 2018-04-18 2018-09-18 天津城建大学 A kind of frozen soil latent heat of phase change computational methods considering unfrozen water content nonlinear change
CN108931553A (en) * 2018-05-28 2018-12-04 天津城建大学 A kind of calculation method that frozen soil latent heat of phase change is converted to equivalent specific heat
CN109507234A (en) * 2019-01-02 2019-03-22 大连理工大学 A kind of thermal conductivity of frozen soils test modification method based on heat-pole method
CN110208314A (en) * 2019-06-14 2019-09-06 大连理工大学 A kind of frozen soil specific heat mixing calorimetric test device and its implementation method considering latent heat of phase change
CN110777737A (en) * 2019-10-16 2020-02-11 天津大学 Anti-freezing core wall phase change clay for winter construction process and construction method thereof

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5261490A (en) * 1991-03-18 1993-11-16 Nkk Corporation Method for dumping and disposing of carbon dioxide gas and apparatus therefor
US20040120772A1 (en) * 2001-10-24 2004-06-24 Vinegar Harold J. Isolation of soil with a low temperature barrier prior to conductive thermal treatment of the soil
EP1438462A2 (en) * 2001-10-24 2004-07-21 Shell Oil Company Isolation of soil with a frozen barrier prior to conductive thermal treatment of the soil
US20110166843A1 (en) * 2007-08-24 2011-07-07 Sheng-Yuan Hsu Method For Modeling Deformation In Subsurface Strata
CN102135513A (en) * 2011-01-04 2011-07-27 刘波 Method for testing content of unfrozen water in frozen earth
CN104458430A (en) * 2014-11-05 2015-03-25 大连理工大学 Multifunctional unsaturated soil consolidation apparatus and test method
CN104792818A (en) * 2015-04-07 2015-07-22 河南大学 Method for calculating specific heat at clay freezing stage by performing energy substitution on phase-change latent heat of water in soil
CN105044147A (en) * 2015-07-10 2015-11-11 中国矿业大学 Near-phase change zone frozen soil thermal conductivity coefficient determination device and method
CN105241920A (en) * 2015-11-06 2016-01-13 天津城建大学 Method for determining content of unfrozen water in soil freezing process by using specific heat calculation
CN107966473A (en) * 2017-12-08 2018-04-27 天津城建大学 Model Permafrost Thermal calculation method of parameters based on the theory of similarity
CN108549617A (en) * 2018-04-18 2018-09-18 天津城建大学 A kind of frozen soil latent heat of phase change computational methods considering unfrozen water content nonlinear change
CN108931553A (en) * 2018-05-28 2018-12-04 天津城建大学 A kind of calculation method that frozen soil latent heat of phase change is converted to equivalent specific heat
CN109507234A (en) * 2019-01-02 2019-03-22 大连理工大学 A kind of thermal conductivity of frozen soils test modification method based on heat-pole method
CN110208314A (en) * 2019-06-14 2019-09-06 大连理工大学 A kind of frozen soil specific heat mixing calorimetric test device and its implementation method considering latent heat of phase change
CN110777737A (en) * 2019-10-16 2020-02-11 天津大学 Anti-freezing core wall phase change clay for winter construction process and construction method thereof

Non-Patent Citations (6)

* Cited by examiner, † Cited by third party
Title
FUCHS M 等: "An analysis of sensible and latent heat flow in a partially frozen unsaturated soil", 《SOIL SCIENCE SOCIETY OF AMERICA JOURNAL》 *
刘晓燕等: "冻土地区土壤水热耦合温度场的分析", 《低温建筑技术》 *
戚春香等: "漠河地区多年冻土地基温度场附面层参数研究", 《中国民航大学学报》 *
王凯等: "正冻黏土瞬态温度场计算方法改进与试验验证", 《深圳大学学报(理工版)》 *
肖朝昀 等: "上海人工冻结土层热物理参数", 《福建工程学院学报》 *
高凌霞: "黄土湿陷性的微结构效应及其评价方法研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113533421A (en) * 2021-07-15 2021-10-22 安徽水安建设集团股份有限公司 Frozen soil heat conductivity coefficient test correction method
CN113533421B (en) * 2021-07-15 2024-03-19 安徽水安建设集团股份有限公司 Frozen soil heat conductivity coefficient test correction method

Also Published As

Publication number Publication date
CN111380906B (en) 2021-08-17

Similar Documents

Publication Publication Date Title
CN104792818B (en) The clay that native reclaimed water latent heat of phase change is carried out into energy replacement freezes stage specific heat computational methods
Romanovsky et al. Thawing of the active layer on the coastal plain of the Alaskan Arctic
CN111380906B (en) Refinement method for converting phase change latent heat of frozen soil into equivalent specific heat
Rui et al. Field experimental study of the characteristics of heat and water transfer during frost heaving
Sang et al. Assessing the freezing process of early age concrete by resistivity method
CN107402227A (en) The computational methods of soil body mineral thermal conductivity factor
CN106885752A (en) The assay method of periclase weight/mass percentage composition in cement
CN106841290A (en) Suitable for the thermal conductivity factor computational methods of saturation chiltern frozen soil
Benoit et al. Freezing and thawing effects on drainage
Larsen Hydraulic roughness of ice covers
Herz et al. Microclimate within coarse debris of talus slopes in the alpine periglacial belt and its effect on permafrost
Rapp Effect of calcium chloride on Portland cements and concretes
CN108549617B (en) Frozen soil phase change latent heat calculation method considering non-linear change of unfrozen water content
Grübl et al. Rapid ice formation in hardened cement paste, mortar and concrete due to supercooling
Gadzhiev et al. Thermal and electrical properties of gadolinium sulfides at high temperatures
Genxu et al. Impacts of changes in vegetation cover on soil water heat coupling in an alpine meadow of the Qinghai-Tibet Plateau, China
CN109753625B (en) Climate elasticity solving method considering soil water content change
CN106885753A (en) The method that minusing determines periclase degree of hydration in cement
Liu et al. The influence of thermophysical properties of frozen soil on the temperature of the cast-in-place concrete pile in a negative temperature environment
CN109900733B (en) Test method for initial damage of bubble mixed light soil
Sun et al. Temperature Control for Mass Concrete Construction of Wentang Bridge 5# Pier Pile Cap in Winter Construction
CN115058932B (en) Roadbed for frozen soil road section and construction method thereof
Wei et al. Experiment on the freezing temperature of silty clay modified by fly ash and crumb rubber
CN104629714A (en) Formula and preparation method of high temperature emulsified acid
CN117925214B (en) High condensate oil resistant antifreezing foam discharging agent and preparation method and application thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant