CN102749278B - Method for testing depth of influence of acid rain on red clay on basis of pH value test - Google Patents
Method for testing depth of influence of acid rain on red clay on basis of pH value test Download PDFInfo
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- CN102749278B CN102749278B CN201210258749.7A CN201210258749A CN102749278B CN 102749278 B CN102749278 B CN 102749278B CN 201210258749 A CN201210258749 A CN 201210258749A CN 102749278 B CN102749278 B CN 102749278B
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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
The technical field of the invention is civil engineering field, and particularly a kind of Acid Rain red clay based on the test of pH value affects degree of depth test method.
Background technology
Red clay, its clay mineral grain is superfine, between clay mineral often with static(al) to attraction,---face, limit---mode of face combination that is face, forms crumb structure, the fine pore in granule is often by planar water is filled.Clay mineral has stable crystallization screen work, and 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 large on the mechanical property impact of red clay.Water chemistry effect between the red clay soil body and water (ion-exchange, redox etc.) is dissolve mineralogical composition, the cementing matter of the soil body or make some composition crystalline deposit, cause the micromechanism such as native porosity, soil particle arrangement mode to change, change soil property proterties, the reason that the natural intensity of the soil body and deformation characteristic are changed.But under infiltration condition, weaken because the passage of free iron oxide makes cementation, the impact of the engineering properties on red clay is obvious.Seepage flow has dissolution to the free oxide in red clay, and then destroys cementing between former granule, affects the physico-mechanical properties of red clay.Under the effect of acid rain, 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: the dissolving of acid rain to difficulty soluble salt particle in red clay, soil body particle diameter is diminished, specific surface area increases, and its property of water-bearing, plasticity and compressibility are increased; The corrosion of acid rain to soil body cementing matter, destroys soil body original structure, 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 affects of Acid Rain red clay, now conventional method be in the outdoor soil body pipe laying to collect acid rain leaching water, also the pilot region soil body to 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 large, need to drop into a large amount of manpower and materials.Therefore, wish to set up indoor test method to overcome the defect of site test.
Summary of the invention
The object of this invention is to provide a kind of Acid Rain red clay based on the test of pH value and affect degree of depth test method.This test method need to complete by a kind of unsaturation soil body leaching and Simulation of Seepage Field device.
Concrete steps are:
(1) a kind of unsaturation soil body leaching and Simulation of Seepage Field device are set, comprise leaching liquor storer, leaching device, soil body leaching simulator and end collection, leaching liquor memory device is in the side surface direction higher than leaching device, and leaching liquor storer bottom is connected to leaching device by the leaching liquor conduit with flowrate control valve; Leaching device and soil body leaching simulator are isodiametric cylindrical structural, and leaching device is set up on soil body leaching simulator; End collection is placed under soil body leaching simulator, to collect pouring fluid.
Described leaching device comprises motor, annular aproll and rainfall simulator, and motor drives rainfall simulator to rotate by rotating shaft, and rainfall simulator is the circular sheet that is covered with aperture, rainfall simulator outside configuration leakproof rubber ring.
Described soil body leaching simulator is two hollow cylinders that semi-circular arch is spliced, and is tightened up and is filled marine glue in case leak-stopping water by physical construction; Every semi-circular arch side arranges longitudinally equidistantly can closed side osculum; Tu Kou is put at soil body leaching simulator top, in order to add in due course the soil body or to observe leaching liquor situation; Soil body leaching simulator bottom arranges soil body penetration base for supporting, adopts the disk with uniform hole to test red clay body to support.
Collection of the described end adopts cylinder design, is connected with soil body leaching simulator bottom by screw socket.
(2) the described analogue means of step (1) is tested in accordance with the following methods: acid rain is loaded on leaching liquor memory device in the side surface direction higher than leaching device, leaching liquor storer bottom opening, acid rain enters the annular aproll of leaching device by the leaching liquor conduit with flowrate control valve, cushion through annular aproll, flow into equably in leaching device with control of acid rain impulse force, under Gravitative Loads, pass the rainfall simulator being rotated by driven by motor, form and continue uniform Simulated Acid Rain rainfall, acid rain is down on the test red clay body in the soil body leaching simulator of leaching device bottom, the closed side osculum arranging in soil body leaching simulator side is collected the side direction acid rain leaching liquor of different depth, and testing its pH value affects the degree of depth to understand Acid Rain red clay, bottom soil body leaching simulator, adopt soil body penetration base for supporting to support testing red clay body, it adopts the disk with uniform hole so that pouring fluid need to be from soil body penetration base for supporting infiltration outflow according to test, soil body leaching simulator is divided into end collection, is sealing after side osculum, and acid rain drenches fluid and arrives end collection by soil body penetration base for supporting, drenches the pH value of fluid and affects the degree of depth to understand Acid Rain red clay thereby can measure.
Different from traditional test method, the present invention uses unsaturation soil body leaching and Simulation of Seepage Field device to carry out shop experiment, and tool has the following advantages:
(1) analogue means that the present invention uses is simple in structure, is easy to safeguard, modular design, can easily change leaching solution and the experiment soil body, can meet the requirement of revision test, uses manpower and material resources sparingly.
(2) the present invention is easy to use, environmental protection and energy saving, owing to adopting double-disk hollow cylinder mechanism, for completed soil body test, only need to open annular fastening device, take out and change the soil body in soil body leaching simulator, easy to use, and instrument adopts powered battery without other energy consumptions, environmental protection and energy saving except motor.
(3) data are more accurate, adopt closed side osculum and end liquor collecting device to facilitate the pouring fluid pH value of the different layers position soil body is tested, and can simulate unsaturated red clay seepage field situation, thereby obtain more accurate and comprehensive data.
Accompanying drawing explanation
Fig. 1 is equipment therefor connection diagram of the present invention.
Fig. 2 is rainfall simulator and leakproof rubber ring schematic diagram in equipment therefor of the present invention.
Mark in figure: 1-leaching liquor storer; 2-leaching liquor conduit; 3-flowrate control valve; 4-motor; 5-annular aproll; 6-leaching device; 7-rainfall simulator; 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 13-; 14-test red clay body.
Embodiment
Embodiment:
(1) a kind of unsaturation soil body leaching and Simulation of Seepage Field device are set, comprise leaching liquor storer, leaching device, soil body leaching simulator and end collection, leaching liquor memory device is in the side surface direction higher than leaching device, and leaching liquor storer bottom is connected to leaching device by the leaching liquor conduit with flowrate control valve; Leaching device and soil body leaching simulator are isodiametric cylindrical structural, and leaching device is set up on soil body leaching simulator; End collection is placed under soil body leaching simulator, to collect pouring fluid.
Described leaching device comprises pouring motor, annular aproll and rainfall simulator, and motor drives rainfall simulator to rotate by rotating shaft, and rainfall simulator is the circular sheet that is covered with aperture, rainfall simulator outside configuration leakproof rubber ring.
Described soil body leaching simulator is two hollow cylinders that semi-circular arch is spliced, and is tightened up and is filled marine glue in case leak-stopping water by physical construction; Every semi-circular arch side arranges longitudinally equidistantly can closed side osculum; Tu Kou is put at soil body leaching simulator top, in order to add in due course the soil body or to observe leaching liquor situation; Soil body leaching simulator bottom arranges soil body penetration base for supporting, adopts the disk with uniform hole to test red clay body to support.
Collection of the described end adopts cylinder design, is connected with soil body leaching simulator bottom by screw socket.
(2) the described analogue means of step (1) is tested according to following principle: acid rain is loaded on leaching liquor memory device in the side surface direction higher than leaching device, leaching liquor storer bottom opening, acid rain enters the annular aproll of leaching device by the leaching liquor conduit with flowrate control valve, cushion through annular aproll, flow into equably in leaching device with control of acid rain impulse force, under Gravitative Loads, pass the rainfall simulator being rotated by driven by motor, form and continue uniform Simulated Acid Rain rainfall, acid rain is down on the test red clay body in the soil body leaching simulator of leaching device bottom, the closed side osculum arranging in soil body leaching simulator side is collected the side direction acid rain leaching liquor of different depth, and testing its pH value affects the degree of depth to understand Acid Rain red clay, bottom soil body leaching simulator, adopt soil body penetration base for supporting to support testing red clay body, it adopts the disk with uniform hole so that pouring fluid need to be from soil body penetration base for supporting infiltration outflow according to test, soil body leaching simulator is divided into end collection, is sealing after side osculum, and acid rain drenches fluid and arrives end collection by soil body penetration base for supporting, thereby the pH value that can drench fluid by measurement affects the degree of depth to understand Acid Rain red clay.
Claims (1)
1. the Acid Rain red clay based on the test of pH value affects a degree of depth test method, it is characterized in that concrete steps are:
(1) a kind of unsaturation soil body leaching and Simulation of Seepage Field device are set, comprise leaching liquor storer, leaching device, soil body leaching simulator and end collection, leaching liquor memory device is in the side surface direction higher than leaching device, and leaching liquor storer bottom is connected to leaching device by the leaching liquor conduit with flowrate control valve; Leaching device and soil body leaching simulator are isodiametric cylindrical structural, and leaching device is set up on soil body leaching simulator; End collection is placed under soil body leaching simulator, to collect pouring fluid;
Described leaching device comprises motor, annular aproll and rainfall simulator, and motor drives rainfall simulator to rotate by rotating shaft, and rainfall simulator is the circular sheet that is covered with aperture, rainfall simulator outside configuration leakproof rubber ring;
Described soil body leaching simulator is two hollow cylinders that semi-circular arch is spliced, and is tightened up and is filled marine glue in case leak-stopping water by physical construction; Every semi-circular arch side arranges longitudinally equidistantly can closed side osculum; Tu Kou is put at soil body leaching simulator top, in order to add in due course the soil body or to observe leaching liquor situation; Soil body leaching simulator bottom arranges soil body penetration base for supporting, adopts the disk with uniform hole to test red clay body to support;
Collection of the described end adopts cylinder design, is connected with soil body leaching simulator bottom by screw socket;
(2) the described analogue means of step (1) is tested in accordance with the following methods: acid rain is loaded on leaching liquor memory device in the side surface direction higher than leaching device, leaching liquor storer bottom opening, acid rain enters the annular aproll of leaching device by the leaching liquor conduit with flowrate control valve, cushion through annular aproll, flow into equably in leaching device with control of acid rain impulse force, under Gravitative Loads, pass the rainfall simulator being rotated by driven by motor, form and continue uniform Simulated Acid Rain rainfall, acid rain is down on the test red clay body in the soil body leaching simulator of leaching device bottom, the closed side osculum arranging in soil body leaching simulator side is collected the side direction acid rain leaching liquor of different depth, and testing its pH value affects the degree of depth to understand Acid Rain red clay, bottom soil body leaching simulator, adopt soil body penetration base for supporting to support testing red clay body, it adopts the disk with uniform hole so that pouring fluid need to be from soil body penetration base for supporting infiltration outflow according to test, soil body leaching simulator is divided into end collection, is sealing after side osculum, and acid rain drenches fluid and arrives end collection by soil body penetration base for supporting, thereby the pH value that can drench fluid by measurement affects the degree of depth to understand Acid Rain red clay.
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| CN108318660A (en) * | 2018-02-05 | 2018-07-24 | 中国矿业大学 | The lower gangue eluviation and immersion experimental rig of multi- scenarios method 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 |
| 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 |