CN115096763A - Concrete internal water flow microscopic analysis method based on double-pore transmission theory - Google Patents
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- 239000011148 porous material Substances 0.000 title claims abstract description 163
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 105
- 239000004567 concrete Substances 0.000 title claims abstract description 92
- 230000005540 biological transmission Effects 0.000 title claims abstract description 53
- 238000007431 microscopic evaluation Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004458 analytical method Methods 0.000 claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 238000005206 flow analysis Methods 0.000 claims abstract description 8
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims abstract description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 5
- 238000009792 diffusion process Methods 0.000 claims description 21
- 230000007704 transition Effects 0.000 claims description 18
- 239000002002 slurry Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 230000004907 flux Effects 0.000 claims description 4
- 239000002105 nanoparticle Substances 0.000 claims description 4
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 abstract description 4
- 230000000737 periodic effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001351 cycling effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
- G01N15/0886—Mercury porosimetry
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Abstract
The invention discloses a concrete internal water flow microscopic analysis method based on a double-pore transmission theory, which comprises the following steps of: step a, measuring the internal porosity and pore size distribution data of the concrete by using a micro-testing means mercury intrusion method, and establishing a parameter distribution model of the internal pore size of the concrete; b, dividing the inner pores of the concrete into large pores and small pores; c, respectively determining the porosity of large and small pores according to the established parameter distribution model of the size of the pores in the concrete; step d, deducing and establishing a water transmission double-pore model; step e, determining a moisture transmission boundary condition; step f, establishing a concrete mesoscopic analysis model; and g, combining the established 'double-pore' model for water transmission and the concrete microscopic analysis model to carry out the internal water flow analysis of the concrete. The method can accurately analyze the water transmission and distribution rule in the concrete, and can be effectively applied to the durability analysis of the coastal reinforced concrete structure.
Description
Technical Field
The invention relates to the technical field of concrete structure durability analysis, in particular to a microscopic analysis method for concrete internal water flow based on a double-pore transmission theory.
Background
The concrete is a porous material, and the concrete mainly comprises slurry, aggregate and an interface transition region, wherein the slurry and the interface transition region are in the presence of pores, moisture can be transmitted in the pores, corrosive media such as chloride ions and the like flow along with the moisture, namely the pores are an important factor influencing the durability of a concrete structure, and the transmission mechanism of the moisture in the concrete needs to be revealed from a microscopic view point.
It should be noted that the durability of the existing concrete structure is mainly based on macro-scale analysis, and the existing macro-scale analysis generally analyzes the internal pores of the concrete as a whole, and ignores the different physical and mechanical properties inside the pores with different sizes.
Disclosure of Invention
The invention aims to provide a concrete internal water flow microscopic analysis method based on a double-pore transmission theory, which can effectively solve the microscopic problem which cannot be revealed by the existing macroscopic analysis, can accurately analyze the water transmission and distribution rule in the concrete, can accurately reveal the distribution condition of an unsaturated area in the concrete under the change of boundary water, and can be effectively suitable for developing the durability analysis of a coastal reinforced concrete structure.
In order to achieve the above object, the present invention is achieved by the following technical solutions.
The microscopic analysis method for the concrete internal water flow based on the double-pore transmission theory is characterized by comprising the following steps:
step a, measuring the internal porosity and pore size distribution data of the concrete by using a micro-testing means mercury intrusion method, and establishing a parameter distribution model of the internal pore size of the concrete;
b, dividing the internal pores of the concrete into macropores and micropores according to the measured size distribution condition of the internal pores of the concrete, wherein the macropores represent macropores with micron-sized dimensions, and the micropores represent micropores with nano-sized dimensions;
step c, respectively determining the porosity of large pores and the porosity of small pores based on the classification standards of the large pores and the small pores and according to the established parameter distribution model of the size of the pores in the concrete;
d, deducing and establishing a water transmission double-pore model according to a Darcy law and considering the existence of substance exchange between the large pores and the small pores;
e, determining a water transmission boundary condition, and replacing a direct water saturation boundary condition with a flux boundary condition;
step f, establishing a concrete microscopic analysis model considering the slurry, the aggregate and the interface transition area, and respectively endowing the slurry, the aggregate and the interface transition area with different water diffusion coefficients, wherein the water is considered to be incapable of being transmitted in the aggregate, namely the water diffusion coefficient of the aggregate is zero, and the water diffusion coefficient of the slurry and the water diffusion coefficient of the interface transition area are determined through a water diffusion test; performing mesh division based on general finite element software according to the established concrete mesoscopic analysis model;
and g, combining the established 'double-pore' model for water transmission and the concrete microscopic analysis model, carrying out internal water flow analysis on the concrete to obtain the internal water transmission and distribution rule of the concrete, and revealing the influence of the aggregate and the interface transition region on the water transmission behavior.
In the step c, the porosities with different sizes are obtained through integral calculation, and the integral formula is as follows:
in the formula (1), the first and second groups of the compound,
in order to be a porosity factor, the pore size of the porous material,
in order to correspond to the maximum pore diameter of the pores,
as a function of pore size distribution density.
In step d, after determining the porosity of the large pores and the porosity of the small pores, the water saturation is used as a variable and a water transmission "double-pore" model is deduced and established, wherein the water transmission "double-pore" model is shown as the following formula:
in equation (2):
1 the porosity of the macropores is the ratio of,
2 is the porosity of the small pores and is,
the degree of water saturation of the macropores,
is the degree of moisture saturation of the small pores,
the water diffusion coefficient of the macropores is,
is the water diffusion coefficient of the small pores,
is water density and
=1000kg/m 3 ，
the water exchange rate of large and small pore spaces.
Wherein, the water exchange rate of large and small pore spaces
The expression is as follows:
in the formula (3), the first and second groups,
the average pore pressure is a large pore average,
the small pore mean pore pressure;
is constant when
When the value is 0, no material exchange occurs between pores, and when the value is 0
Infinite value indicates very fast material exchange between pores, and
the values were determined by moisture transport testing.
Wherein the large pore mean pore pressure in the formula (3)
Small pore average pore pressure
The expression is as follows:
in the formula (4), the first and second groups,
in order to correspond to the pressure of the gas in the pores,
corresponding to the water pressure in the pores.
Wherein the content of the first and second substances,
、
the relationship between them is expressed as the following formula:
in the formula (5), the first and second groups,
is capillary pressure.
In the step g, flow analysis of the water in the concrete is carried out in a constant drying mode and a 24-hour periodic dry-wet circulation mode respectively, rectangular change and sinusoidal change are considered in the 24-hour periodic dry-wet circulation mode respectively to obtain the water transmission and distribution rules in the concrete in different modes, and the influences of regional distribution of the unsaturated region in the concrete along with the change of time and the aggregate and interface transition region on the water transmission behavior are revealed.
The invention has the beneficial effects that: the invention discloses a concrete internal water flow microscopic analysis method based on a double-pore transmission theory, which comprises the following steps of: step a, measuring internal porosity and pore size distribution data of concrete by using a micro-testing means mercury intrusion method, and establishing a parameter distribution model of the size of the internal pores of the concrete; b, dividing the internal pores of the concrete into macropores and micropores according to the measured size distribution condition of the internal pores of the concrete, wherein the macropores represent macropores with micron-sized dimensions, and the micropores represent micropores with nano-sized dimensions; step c, respectively determining the porosity of large pores and the porosity of small pores based on the classification standards of the large pores and the small pores and according to the established parameter distribution model of the size of the pores in the concrete; d, deducing and establishing a water transmission double-pore model according to a Darcy law and considering the existence of substance exchange between the large pores and the small pores; step e, determining a water transmission boundary condition, and replacing a direct water saturation boundary condition with a flux boundary condition; step f, establishing a concrete microscopic analysis model considering slurry, aggregate and an interface transition area, and carrying out grid division based on general finite element software; and g, combining the established 'double-pore' model for water transmission and the concrete microscopic analysis model to carry out the internal water flow analysis of the concrete. Through the steps, the microscopic analysis method for concrete internal water flow based on the theory of double-pore transmission can effectively solve the microscopic problem which cannot be revealed by the existing macroscopic analysis, can accurately analyze the internal water transmission and distribution rule of the concrete, can accurately reveal the distribution condition of the unsaturated area in the concrete under the condition of boundary water change, and can be effectively suitable for developing the durability analysis of the coastal reinforced concrete structure.
Drawings
The invention will be further described with reference to the drawings, to which, however, the embodiments do not constitute any limitation.
FIG. 1 is a diagram of the internal porosity of concrete.
FIG. 2 is a schematic representation of a moisture transport "double pore" model.
FIG. 3 is a schematic representation of the mean pressure of unsaturated pores.
FIG. 4 is a schematic of the liquid pressure in an unsaturated pore.
FIG. 5 is a concrete microscopic model diagram.
FIG. 6 is a graph showing changes in the saturation of water on the surface of concrete.
Fig. 7 is a graph of the internal water saturation distribution of concrete in a 24 hour cycle dry-wet cycle mode (rectangular variation).
Fig. 8 is a cloud of water saturation distribution inside concrete with 24-hour cycle dry-wet (rectangular change).
Fig. 9 is a 24 hour period dry wet cycle (sinusoidal variation) concrete internal moisture saturation profile.
Fig. 10 is a cloud of moisture saturation profiles within concrete over a 24 hour period of dry-wet cycling (sinusoidal variation).
Detailed Description
The present invention will be described below with reference to specific embodiments.
The microscopic analysis method for the concrete internal water flow based on the double-pore transmission theory is characterized by comprising the following steps:
step a, measuring the internal porosity and pore size distribution data of the concrete by using a micro-testing means mercury intrusion method, and establishing a parameter distribution model of the internal pore size of the concrete;
b, dividing the internal pores of the concrete into macropores and micropores according to the measured size distribution condition of the internal pores of the concrete, wherein the macropores represent macropores with micron-sized dimensions, and the micropores represent micropores with nano-sized dimensions;
step c, respectively determining the porosity of large pores and the porosity of small pores based on the classification standards of the large pores and the small pores and according to the established parameter distribution model of the size of the pores in the concrete; specifically, the porosities with different sizes are obtained through integral calculation, and the integral formula is as follows:
in the formula (1), the first and second groups,
in order to be a porosity factor, the pore size of the porous material,
in order to correspond to the maximum pore diameter of the pores,
as a function of pore size distribution density;
d, deducing and establishing a water transmission double-pore model according to Darcy law and considering the existence of substance exchange between the large pores and the small pores;
e, determining a water transmission boundary condition, and replacing a direct water saturation boundary condition with a flux boundary condition;
step f, establishing a concrete microscopic analysis model considering the slurry, the aggregate and the interface transition area, and respectively endowing the slurry, the aggregate and the interface transition area with different water diffusion coefficients, wherein the water is considered to be incapable of being transmitted in the aggregate, namely the water diffusion coefficient of the aggregate is zero, and the water diffusion coefficient of the slurry and the water diffusion coefficient of the interface transition area are determined through a water diffusion test; performing mesh division based on general finite element software according to the established concrete mesoscopic analysis model;
and g, combining the established 'double-pore' model for water transmission and the concrete microscopic analysis model, carrying out internal water flow analysis on the concrete to obtain the internal water transmission and distribution rule of the concrete, and revealing the influence of the aggregate and the interface transition region on the water transmission behavior.
It should be noted that, in step d, after determining the porosity of the large pores and the porosity of the small pores, the moisture saturation is used as a variable and a moisture transport "dual-pore" model is derived and established, and the moisture transport "dual-pore" model is shown by the following formula:
in equation (2):
1 the porosity of the macropores is the ratio of,
2 is the porosity of the small pores and is,
is the degree of water saturation of the macropores,
is the degree of moisture saturation of the small pores,
the water diffusion coefficient of the macropores is,
is the water diffusion coefficient of the small pores,
is water density and
=1000kg/m 3 ，
the water exchange rate of large and small pore spaces.
For the large and small pore water exchange rate in the formula (2)
And the expression is as follows:
in the formula (3), the first and second groups,
the average pore pressure is a large pore average,
the small pore mean pore pressure;
is constant when
When the value is 0, no material exchange occurs between pores, and when the value is 0
Infinite values indicate very fast material exchange between pores, and
the values were determined by moisture transport testing.
Average pore pressure for macropores in equation (3)
Small pore average pore pressure
The expression is as follows:
in the formula (4), the first and second groups of the compound,
in order to correspond to the gas pressure in the pores,
is the water pressure in the corresponding pore; in addition, the first and second substrates are,
、
the relationship between them is expressed as the following formula:
in the case of the formula (5),
is capillary pressure.
Specifically, in the step g, the flow analysis of the water in the concrete is carried out in a constant drying mode and a 24-hour periodic dry-wet circulation mode respectively, rectangular change and sinusoidal change are considered in the 24-hour periodic dry-wet circulation mode respectively to obtain the water transmission and distribution rules in the concrete in different modes, and the influences of the regional distribution of the unsaturated region in the concrete along with the change of time and the aggregate and interface transition region on the water transmission behavior are revealed.
Through the steps, the microscopic analysis method for concrete internal water flow based on the theory of double-pore transmission can effectively solve the microscopic problem which cannot be revealed by the existing macroscopic analysis, can accurately analyze the water transmission and distribution rule in the concrete, can accurately reveal the distribution condition of the unsaturated area in the concrete under the change of boundary water, and can be effectively suitable for developing the durability analysis of the coastal reinforced concrete structure.
The above description is only a preferred embodiment of the present invention, and it should not be understood that the present invention is limited to the details of the embodiment and the range of applications, which can be changed by those skilled in the art according to the spirit of the present invention.
Claims (7)
1. The concrete internal water flow microscopic analysis method based on the double-pore transmission theory is characterized by comprising the following specific steps:
step a, measuring internal porosity and pore size distribution data of concrete by using a micro-testing means mercury intrusion method, and establishing a parameter distribution model of the size of the internal pores of the concrete;
b, dividing the internal pores of the concrete into macropores and micropores according to the measured size distribution condition of the internal pores of the concrete, wherein the macropores represent macropores with micron-sized dimensions, and the micropores represent micropores with nano-sized dimensions;
step c, respectively determining the porosity of large pores and the porosity of small pores based on the classification standards of the large pores and the small pores and according to the established parameter distribution model of the size of the pores in the concrete;
d, deducing and establishing a water transmission double-pore model according to a Darcy law and considering the existence of substance exchange between the large pores and the small pores;
step e, determining a water transmission boundary condition, and replacing a direct water saturation boundary condition with a flux boundary condition;
step f, establishing a concrete microscopic analysis model considering the slurry, the aggregate and the interface transition area, and respectively endowing the slurry, the aggregate and the interface transition area with different water diffusion coefficients, wherein the water is considered to be incapable of being transmitted in the aggregate, namely the water diffusion coefficient of the aggregate is zero, and the water diffusion coefficient of the slurry and the water diffusion coefficient of the interface transition area are determined through a water diffusion test; carrying out mesh division based on general finite element software according to the established concrete meso-scale analysis model;
and g, combining the established 'double-pore' model for water transmission and the concrete microscopic analysis model, carrying out internal water flow analysis on the concrete to obtain the internal water transmission and distribution rule of the concrete, and revealing the influence of the aggregate and the interface transition region on the water transmission behavior.
2. The concrete internal water flow microscopic analysis method based on the double-pore transmission theory as claimed in claim 1, wherein in the step c, the porosities with different sizes are obtained through integral calculation, and the integral formula is as follows:
in the formula (1), the first and second groups,
in order to be a porosity factor, the pore size of the porous material,
in order to correspond to the maximum pore diameter of the pores,
as a function of pore size distribution density.
3. The concrete internal moisture flow mesoscopic analysis method based on the double-pore transmission theory as claimed in claim 2, wherein in the step d, after the porosity of large pores and the porosity of small pores are determined, a moisture saturation degree is used as a variable and a moisture transmission "double-pore" model is deduced and established, wherein the moisture transmission "double-pore" model is shown as the following formula:
in equation (2):
1 the porosity of the macropores is the ratio of,
2 is the porosity of the small pores and is,
is the degree of water saturation of the macropores,
is the degree of moisture saturation of the small pores,
the water diffusion coefficient of the macropores is,
is the water diffusion coefficient of the small pores,
is water density and
=1000kg/m 3 ，
the water exchange rate of large and small pore spaces.
4. The concrete internal moisture flow microscopic analysis method based on the double-pore transmission theory as claimed in claim 3, wherein: water exchange rate of large and small pore
The expression is as follows:
in the formula (3), the first and second groups,
the average pore pressure of the large pores is obtained,
the small pore mean pore pressure;
is constant when
When the value is 0, no material exchange occurs between pores, and when the value is 0
Infinite values indicate very fast material exchange between pores, and
the values were determined by moisture transport testing.
5. The concrete internal water flow microscopic analysis method based on the double-pore transmission theory as claimed in claim 4, wherein: average pore pressure of macropores in the above formula (3)
Small pore average pore pressure
The expression is as follows:
in the formula (4), the first and second groups,
in order to correspond to the pressure of the gas in the pores,
corresponding to the water pressure in the pores.
6. The method of claim 5The microscopic analysis method for the internal water flow of the concrete based on the double-pore transmission theory is characterized by comprising the following steps:
、
the relationship between them is expressed as the following formula:
in the formula (5), the first and second groups,
is capillary pressure.
7. The concrete internal water flow microscopic analysis method based on the double-pore transmission theory as claimed in claim 1, wherein: in the step g, the flow analysis of the internal water of the concrete is carried out in a constant drying mode and a 24-hour period dry-wet circulation mode respectively, rectangular change and sinusoidal change are considered in the 24-hour period dry-wet circulation mode respectively to obtain the internal water transmission and distribution rules of the concrete in different modes, and the influences of the area distribution of the internal unsaturated area of the concrete along with the change of time and the aggregate and interface transition area on the water transmission behavior are revealed.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050027499A1 (en) * | 2003-07-29 | 2005-02-03 | Bernard Bourbiaux | Method for modelling compositional and/or multiphase transfers between the porous matrix and the fractures of a multilayer porous medium |
| CN109243544A (en) * | 2018-09-03 | 2019-01-18 | 哈尔滨工业大学 | Concrete inner transmission matter calculation method under environment and material physical chemistry essential |
| US20200320239A1 (en) * | 2019-04-04 | 2020-10-08 | IFP Energies Nouvelles | Method of exploiting a fractured oil reservoir having a heterogeneous pore size |
| AU2021104861A4 (en) * | 2020-08-03 | 2021-09-30 | Southwest Petroleum University | Simulation method of unsteady-state gas-water two-phase seepage flow in gas reservoir based on pore-fracture dual media |
| CN113552037A (en) * | 2021-06-03 | 2021-10-26 | 浙江大学 | Device and method for testing dual-porosity seepage parameters of garbage |
-
2022
- 2022-05-31 CN CN202210607910.0A patent/CN115096763A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050027499A1 (en) * | 2003-07-29 | 2005-02-03 | Bernard Bourbiaux | Method for modelling compositional and/or multiphase transfers between the porous matrix and the fractures of a multilayer porous medium |
| CN109243544A (en) * | 2018-09-03 | 2019-01-18 | 哈尔滨工业大学 | Concrete inner transmission matter calculation method under environment and material physical chemistry essential |
| US20200320239A1 (en) * | 2019-04-04 | 2020-10-08 | IFP Energies Nouvelles | Method of exploiting a fractured oil reservoir having a heterogeneous pore size |
| AU2021104861A4 (en) * | 2020-08-03 | 2021-09-30 | Southwest Petroleum University | Simulation method of unsteady-state gas-water two-phase seepage flow in gas reservoir based on pore-fracture dual media |
| CN113552037A (en) * | 2021-06-03 | 2021-10-26 | 浙江大学 | Device and method for testing dual-porosity seepage parameters of garbage |
Non-Patent Citations (8)
| Title |
|---|
| JADOON, K. Z., ET AL.: "Estimation of Soil Hydraulic Parameters in the Field by Integrated Hydrogeophysical Inversion of Time-Lapse Ground-Penetrating Radar Data", VADOSE ZONE JOURNAL, vol. 11, no. 4, 30 November 2012 (2012-11-30), pages 1 - 17 * |
| PENG, J. X., ET AL.: "Influence of cracks on chloride diffusivity in concrete: A five-phase mesoscale model approach", CONSTRUCTION AND BUILDING MATERIALS, vol. 197, 30 November 2018 (2018-11-30), pages 587 - 596 * |
| 孙国文等: "现代混凝土传输行为与其微结构之间关系的研究方法及其进展", 材料导报, vol. 32, no. 17, 30 September 2018 (2018-09-30), pages 3010 - 3021 * |
| 延永东等: "干湿交替作用下氯离子在开裂混凝土中的输运规律", 中南大学学报(自然科学版), vol. 44, no. 05, 31 May 2013 (2013-05-31), pages 2060 - 2067 * |
| 徐宗恒等: "土壤优先流研究现状与发展趋势", 土壤, vol. 44, no. 06, 31 December 2012 (2012-12-31), pages 905 - 914 * |
| 朱战伟等: "高性能混凝土氯离子渗透性细观数值模拟", 交通科学与工程, vol. 34, no. 2, 30 June 2018 (2018-06-30), pages 18 - 25 * |
| 熊建银等: "多孔建材中VOC扩散系数的两尺度模型", 工程热物理学报, vol. 29, no. 12, 31 December 2008 (2008-12-31), pages 2091 - 2093 * |
| 詹小军等: "降雨条件下残积土的优先渗流机理分析", 广西大学学报(自然科学版), vol. 43, no. 01, 28 February 2018 (2018-02-28), pages 261 - 268 * |
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