CN102749278A - Method for testing depth of influence of acid rain on red clay on the basis of pH value test - Google Patents
Method for testing depth of influence of acid rain on red clay on the basis of pH value test Download PDFInfo
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- CN102749278A CN102749278A CN2012102587497A CN201210258749A CN102749278A CN 102749278 A CN102749278 A CN 102749278A CN 2012102587497 A CN2012102587497 A CN 2012102587497A CN 201210258749 A CN201210258749 A CN 201210258749A CN 102749278 A CN102749278 A CN 102749278A
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Abstract
The invention discloses a method for testing depth of an influence of acid rain on red clay on the basis of pH value test. An unsaturated soil leaching and seepage field simulating device is arranged and comprises a leaching solution storage device, a leaching device, a soil leaching simulator and a base solution collector, wherein the leaching solution storage device is placed in a position higher than a side surface direction of the leaching device; the bottom of the leaching solution storage device is connected to the leaching device by a leaching solution conduit with a flow control valve; the leaching device and the soil leaching simulator are diameter-equivalent cylindrical structures; and the leaching device is erected above the soil leaching simulator; and the base solution collector is placed below the soil leaching simulator and used for collecting a leaching solution and testing a pH value of the leaching solution so as to obtain the depth of the influence of the acid rain on the red clay. The method for testing the depth of the influence of the acid rain on the red clay on the basis of pH value test, disclosed by the invention, has the advantages of simplicity in operation and more accurate data; and the situation of an unsaturated soil leaching and seepage field can be simulated, so that more accurate and comprehensive data are obtained through testing the pH value of the leaching solution.
Description
Technical field
Technical field is the civil engineering field under the present invention, and particularly a kind of acid rain effect red clay based on the test of pH value influences degree of depth test method.
Background technology
Red clay, its clay mineral grain is superfine, between the clay mineral often with static(al) to attraction, the mode that---face, limit---face that is face combines forms crumb structure, the fine pore in granule is often filled by planar water.Clay mineral has stable crystallization screen work, and the particulate group is formed firm crumb structure, and this " unity " acts on, and has improved the intensity of the soil body.The free oxide that content is few is very big to the mechanical property influence of red clay.Water chemistry effect between the red clay soil body and the water (ion-exchange, redox etc.) is mineralogical composition, the cementing matter of the dissolving soil body or makes some composition crystalline deposit; Cause micromechanisms such as native porosity, soil particle arrangement mode to change; Change the soil property proterties, the reason that natural intensity of the soil body and deformation characteristic are changed.But it is under the infiltration condition,, obvious to the influence of the engineering properties of red clay because the passage of free iron oxide makes cementation weaken.Seepage flow has dissolution to the free oxide in the red clay, and then destroys the gluing between former, influences the physico-mechanical properties of red clay.Under the effect of acid rain, the red clay engineering geological property changes, and causes its property of water-bearing, plasticity and compressibility to increase, and density, shearing strength and bearing capacity reduce.Cause this dysgenic mechanism mainly to be: acid rain diminishes soil body particle diameter to the dissolving of difficulty soluble salt particle in the red clay, and specific surface area increases, and its property of water-bearing, plasticity and compressibility are increased; Acid rain destroys soil body original structure to the corrosion of soil body cementing matter, thereby reduces the shearing strength of the soil body; Acid rain makes the soil body produce ion exchange, has changed the original double electrical layers of grogs, causes the engineering geological property of the soil body to change.
In order to study the degree of depth that influences of acid rain effect red clay; Method now commonly used be in the outdoor soil body pipe laying to collect acid rain leaching water; Also will the pilot region soil body be surrounded and prevent that side direction runs off, though such test can reflect the actual conditions of the soil body, but research process is too tediously long; Workload is big, needs to drop into lot of manpower and material resources.Therefore, hope to set up indoor test method to overcome the defective of site test.
Summary of the invention
The purpose of this invention is to provide a kind of acid rain effect red clay and influence degree of depth test method based on the test of pH value.This test method need be accomplished by a kind of unsaturation soil body leaching and seepage field analogue means.
Concrete steps are:
(1) a kind of unsaturation soil body leaching and seepage field analogue means are set; Comprise leaching liquor storer, leaching device, soil body leaching simulator and end collection; The leaching liquor memory device is in the side surface direction that is higher than the leaching device, and leaching liquor storer bottom is connected to the leaching device through the leaching liquor conduit of band flowrate control valve; Leaching device and soil body leaching simulator are isodiametric cylindrical structural, and the leaching device is set up on the soil body leaching simulator; End collection places under the soil body leaching simulator, drenches fluid to collect.
Said leaching device comprises motor, annular aproll and rainfall simulation device, and motor drives the rainfall simulation device through rotating shaft and rotates, and the rainfall simulation device is the circular sheet that is covered with aperture, rainfall simulation device outside configuration leakproof rubber ring.
Said soil body leaching simulator is two hollow cylinders that semi-circular arch is spliced, and tightens up and fills marine glue in case leak-stopping water through physical construction; But every semi-circular arch side is provided with vertical equidistance closed side osculum; Tu Kou is put at soil body leaching simulator top, in order to add the soil body in due course or to observe the leaching liquor situation; Soil body leaching simulator bottom is provided with the soil body penetration base for supporting, and the disk that adopts band to be uniformly distributed with hole is tested the red clay body to support.
Collection of the said end adopts cylinder design, is connected with soil body simulator bottom through screw socket.
(2) the said analogue means of step (1) is made an experiment according to following method: acid rain is loaded on the leaching liquor memory device in the side surface direction that is higher than the leaching device; Leaching liquor storer bottom opening; Acid rain gets into the annular aproll of leaching device through the leaching liquor conduit of band flowrate control valve; Cushion through annular aproll; Flow into equably with control acid rain impulse force and under the deadweight effect, to pass the rainfall simulation device that is rotated by driven by motor in the leaching device, form and continue uniform Simulated Acid Rain rainfall, acid rain is reduced on the test red clay body in the soil body leaching simulator of leaching device bottom; The closed side osculum that is provided with in soil body leaching simulator side is collected the side direction acid rain leaching liquor of different depth, and testing its pH value influences the degree of depth to understand acid rain effect red clay; Soil body leaching simulator bottom employing soil body penetration base for supporting supports test red clay body, and it adopts band to be uniformly distributed with the disk of hole so that the pouring fluid can be from soil body penetration base for supporting infiltration outflow according to the test needs; Soil body leaching simulator is divided into end collection, and after having sealed the side osculum, acid rain drenches fluid and arrives end collection through the soil body penetration base for supporting, influences the degree of depth thereby can measure the pH value of drenching fluid to understand acid rain effect red clay.
Different with traditional test method, the present invention uses unsaturation soil body leaching and seepage field analogue means to carry out shop experiment, has following advantage:
(1) analogue means of the present invention's use is simple in structure, is easy to safeguard, the leaching solution and the experiment soil body can be easily changed in modular design, can satisfy the requirement of revision test, use manpower and material resources sparingly.
(2) the present invention is easy to use, and environmental protection and energy saving are owing to adopt double-disk hollow cylinder mechanism; For completed soil body test; Only need open annular fastening device, take out and change the soil body in the soil body leaching simulator, easy to use; And instrument does not have other energy consumptions, environmental protection and energy saving except that motor adopts powered battery.
(3) data are more accurate, adopt closed side osculum and end liquor collecting device to make things convenient for the pouring fluid pH value of the different layers position soil body is tested, and can simulate unsaturation red clay seepage field situation, thereby obtain more accurate and comprehensive data.
Description of drawings
Fig. 1 connects synoptic diagram for equipment therefor of the present invention.
Fig. 2 is rainfall simulation device and leakproof rubber ring synoptic diagram in the equipment therefor of the present invention.
Mark among the figure: 1-leaching liquor storer; 2-leaching liquor conduit; The 3-flowrate control valve; The 4-motor; 5-annular aproll; 6-leaching device; 7-rainfall simulation device; 8-leakproof rubber ring; 9-soil body leaching simulator; 10-puts Tu Kou; 11-side osculum; 12-soil body penetration base for supporting; Collection at the bottom of the 13-; 14-test red clay body.
Embodiment
Embodiment:
(1) a kind of unsaturation soil body leaching and seepage field analogue means are set; Comprise leaching liquor storer, leaching device, soil body leaching simulator and end collection; The leaching liquor memory device is in the side surface direction that is higher than the leaching device, and leaching liquor storer bottom is connected to the leaching device through the leaching liquor conduit of band flowrate control valve; Leaching device and soil body leaching simulator are isodiametric cylindrical structural, and the leaching device is set up on the soil body leaching simulator; End collection places under the soil body leaching simulator, drenches fluid to collect.
Said leaching device comprises pouring motor, annular aproll and rainfall simulation device, and motor drives the rainfall simulation device through rotating shaft and rotates, and the rainfall simulation device is the circular sheet that is covered with aperture, rainfall simulation device outside configuration leakproof rubber ring.
Said soil body leaching simulator is two hollow cylinders that semi-circular arch is spliced, and tightens up and fills marine glue in case leak-stopping water through physical construction; But every semi-circular arch side is provided with vertical equidistance closed side osculum; Tu Kou is put at soil body leaching simulator top, in order to add the soil body in due course or to observe the leaching liquor situation; Soil body leaching simulator bottom is provided with the soil body penetration base for supporting, and the disk that adopts band to be uniformly distributed with hole is tested the red clay body to support.
Collection of the said end adopts cylinder design, is connected with soil body simulator bottom through screw socket.
(2) the said analogue means of step (1) is made an experiment according to following principle: acid rain is loaded on the leaching liquor memory device in the side surface direction that is higher than the leaching device; Leaching liquor storer bottom opening; Acid rain gets into the annular aproll of leaching device through the leaching liquor conduit of band flowrate control valve; Cushion through annular aproll; Flow into equably with control acid rain impulse force and under the deadweight effect, to pass the rainfall simulation device that is rotated by driven by motor in the leaching device, form and continue uniform Simulated Acid Rain rainfall, acid rain is reduced on the test red clay body in the soil body leaching simulator of leaching device bottom; The closed side osculum that is provided with in soil body leaching simulator side is collected the side direction acid rain leaching liquor of different depth, and testing its pH value influences the degree of depth to understand acid rain effect red clay; Soil body leaching simulator bottom employing soil body penetration base for supporting supports test red clay body, and it adopts band to be uniformly distributed with the disk of hole so that the pouring fluid can be from soil body penetration base for supporting infiltration outflow according to the test needs; Soil body leaching simulator is divided into end collection, and after having sealed the side osculum, acid rain drenches fluid and arrives end collection through the soil body penetration base for supporting, thereby can influence the degree of depth to understand acid rain effect red clay through measuring the pH value of drenching fluid.
Claims (1)
1. the acid rain effect red clay based on the test of pH value influences degree of depth test method, it is characterized in that concrete steps are:
(1) a kind of unsaturation soil body leaching and seepage field analogue means are set; Comprise leaching liquor storer, leaching device, soil body leaching simulator and end collection; The leaching liquor memory device is in the side surface direction that is higher than the leaching device, and leaching liquor storer bottom is connected to the leaching device through the leaching liquor conduit of band flowrate control valve; Leaching device and soil body leaching simulator are isodiametric cylindrical structural, and the leaching device is set up on the soil body leaching simulator; End collection places under the soil body leaching simulator, drenches fluid to collect;
Said leaching device comprises motor, annular aproll and rainfall simulation device, and motor drives the rainfall simulation device through rotating shaft and rotates, and the rainfall simulation device is the circular sheet that is covered with aperture, rainfall simulation device outside configuration leakproof rubber ring;
Said soil body leaching simulator is two hollow cylinders that semi-circular arch is spliced, and tightens up and fills marine glue in case leak-stopping water through physical construction; But every semi-circular arch side is provided with vertical equidistance closed side osculum; Tu Kou is put at soil body leaching simulator top, in order to add the soil body in due course or to observe the leaching liquor situation; Soil body leaching simulator bottom is provided with the soil body penetration base for supporting, and the disk that adopts band to be uniformly distributed with hole is tested the red clay body to support;
Collection of the said end adopts cylinder design, is connected with soil body simulator bottom through screw socket;
(2) the said analogue means of step (1) is made an experiment according to following method: acid rain is loaded on the leaching liquor memory device in the side surface direction that is higher than the leaching device; Leaching liquor storer bottom opening; Acid rain gets into the annular aproll of leaching device through the leaching liquor conduit of band flowrate control valve; Cushion through annular aproll; Flow into equably with control acid rain impulse force and under the deadweight effect, to pass the rainfall simulation device that is rotated by driven by motor in the leaching device, form and continue uniform Simulated Acid Rain rainfall, acid rain is reduced on the test red clay body in the soil body leaching simulator of leaching device bottom; The closed side osculum that is provided with in soil body leaching simulator side is collected the side direction acid rain leaching liquor of different depth, and testing its pH value influences the degree of depth to understand acid rain effect red clay; Soil body leaching simulator bottom employing soil body penetration base for supporting supports test red clay body, and it adopts band to be uniformly distributed with the disk of hole so that the pouring fluid can be from soil body penetration base for supporting infiltration outflow according to the test needs; Soil body leaching simulator is divided into end collection, and after having sealed the side osculum, acid rain drenches fluid and arrives end collection through the soil body penetration base for supporting, thereby can influence the degree of depth to understand acid rain effect red clay through measuring the pH value of drenching fluid.
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Cited By (4)
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| CN103969419A (en) * | 2013-02-04 | 2014-08-06 | 中国科学院南京地理与湖泊研究所 | Indoor simulation system applied to pollutant migration process researches under artificial rainfall |
| CN105954168A (en) * | 2016-04-15 | 2016-09-21 | 华北水利水电大学 | Testing apparatus for high-temporal-spatial-resolution observation of three-dimensional seepage field of unsaturated soil |
| CN107063939A (en) * | 2017-06-07 | 2017-08-18 | 西南民族大学 | A kind of experimental method of zinc metallurgy CHARACTERISTICS OF TAILINGS SAND heavy metal release simulation |
| CN109709002A (en) * | 2019-02-28 | 2019-05-03 | 湖北理工学院 | A kind of device and method infiltrating the vertical release of pollutant based on simulation unsaturation |
Families Citing this family (1)
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| CN108318660B (en) * | 2018-02-05 | 2020-12-04 | 中国矿业大学 | Coal gangue leaching and soaking test device under multi-field coupling effect |
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| CN105954168B (en) * | 2016-04-15 | 2021-04-13 | 华北水利水电大学 | High-space-time resolution unsaturated soil three-dimensional seepage field observation test device |
| CN107063939A (en) * | 2017-06-07 | 2017-08-18 | 西南民族大学 | A kind of experimental method of zinc metallurgy CHARACTERISTICS OF TAILINGS SAND heavy metal release simulation |
| CN109709002A (en) * | 2019-02-28 | 2019-05-03 | 湖北理工学院 | A kind of device and method infiltrating the vertical release of pollutant based on simulation unsaturation |
| CN109709002B (en) * | 2019-02-28 | 2024-03-19 | 湖北理工学院 | Device and method based on simulation of vertical release of unsaturated infiltration pollutants |
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Application publication date: 20121024 Assignee: Guilin Guoda Mineral Exploration Co.,Ltd. Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2022450000023 Denomination of invention: Test method for influence depth of acid rain on red clay based on pH value test Granted publication date: 20140514 License type: Common License Record date: 20221117 Application publication date: 20121024 Assignee: Guangxi Keming Engineering Survey and Design Co.,Ltd. Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2022450000079 Denomination of invention: Test method for influence depth of acid rain on red clay based on pH value test Granted publication date: 20140514 License type: Common License Record date: 20221118 |
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