CN109596485B - Test device and test method for observing swelling soil montmorillonite dissolution filling process - Google Patents
Test device and test method for observing swelling soil montmorillonite dissolution filling process Download PDFInfo
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- CN109596485B CN109596485B CN201811257022.0A CN201811257022A CN109596485B CN 109596485 B CN109596485 B CN 109596485B CN 201811257022 A CN201811257022 A CN 201811257022A CN 109596485 B CN109596485 B CN 109596485B
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- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 229910052901 montmorillonite Inorganic materials 0.000 title claims abstract description 60
- 239000002689 soil Substances 0.000 title claims abstract description 56
- 238000012360 testing method Methods 0.000 title claims abstract description 44
- 238000005429 filling process Methods 0.000 title claims abstract description 34
- 230000008961 swelling Effects 0.000 title claims abstract description 28
- 238000004090 dissolution Methods 0.000 title claims abstract description 23
- 238000010998 test method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 151
- 238000003860 storage Methods 0.000 claims abstract description 32
- 239000000126 substance Substances 0.000 claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 239000002699 waste material Substances 0.000 claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000002244 precipitate Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 11
- 238000011049 filling Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 238000002441 X-ray diffraction Methods 0.000 claims description 3
- 238000007605 air drying Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims description 3
- 230000000704 physical effect Effects 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims 6
- 238000001035 drying Methods 0.000 claims 1
- 208000010392 Bone Fractures Diseases 0.000 description 8
- 206010017076 Fracture Diseases 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 230000008595 infiltration Effects 0.000 description 6
- 238000001764 infiltration Methods 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001687 destabilization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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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
- G01N15/04—Investigating sedimentation of particle suspensions
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Abstract
The invention discloses a test device and a test method for observing a swelling soil montmorillonite dissolution filling process. The water permeable plate divides the model box into a water storage tank and a seepage test cavity; the model side slope is arranged in the seepage test cavity, and a V-shaped groove is formed in the slope surface; the V-shaped fracture model is inserted in the V-shaped groove and comprises a V-shaped bracket and qualitative filter paper; the intelligent dynamic water supply system comprises a water supply device, a water inlet valve, a water level sensor, a water drain valve and a waste liquid collecting box; the water inlet valve is arranged at the top of the water storage tank and is connected with the water inlet device; the drain valve is arranged at the bottom of the model box and is connected with the waste liquid collecting box; the water level sensor is used for detecting the water level of the water storage tank and is connected with the water supply device. The invention can continuously observe the filling process of the substances in the original fissure surface of the expansive soil under the seepage condition for a long time, and can collect, detect and analyze the substances in real time.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a test device and a test method for observing a swelling soil montmorillonite dissolution filling process.
Background
The multi-fissility is one of the important characteristics of expansive soils. Through geological survey on site, it is found that primary cracks generated by non-swelling deformation exist between strata of a partially expanded land area, the cracks are often inosculated with the landform, and the extending direction of the cracks has a certain rule. Through research, the primary cracks in the expansive soil stratum are cracks with fillers with a certain thickness, the components of the fillers on the crack surfaces are different from those of the soil on the two sides, the natural density is low, the water content is high, the strength is far lower than that of the soil on the crack surfaces on the two sides, and the side slope slides along the crack surfaces.
The cracks are key factors influencing the stability of the expansive soil slope, the montmorillonite dissolved matters in the cracks have obvious influence on the properties of the cracks, and if the dynamic filling process of the montmorillonite dissolved matters in the cracks can be simulated, the long-term instability mechanism of the expansive soil slope can be researched.
The invention is designed based on the above, and can observe the filling process of the swelling soil montmorillonite dissolved substance for a long time under the seepage condition, and collect and analyze the filling substance on the crack surface, thereby researching the dynamic filling process of the swelling soil montmorillonite dissolved substance.
Disclosure of Invention
The present invention is made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a test apparatus for observing a swelling soil montmorillonite dissolution and filling process, which can continuously observe a filling process of a substance in a primary fracture surface of swelling soil under a seepage condition for a long period of time, and can collect, detect and analyze the substance in real time.
In order to solve the technical problems, the invention adopts the technical scheme that:
a test device for observing the swelling soil montmorillonite dissolution filling process comprises a model box, a model side slope, a V-shaped crack model, a permeable plate and an intelligent dynamic water supply system.
The model box is of a cuboid structure, and the permeable plate is inserted in the model box and is parallel to the width side edge of the model box; the water permeable plate divides the model box into a water storage tank and a seepage test cavity, and the volume of the seepage test cavity is larger than that of the water storage tank.
The model side slope is arranged in the seepage test cavity, the horizontal distance of the model side slope is equal to the length of the seepage test cavity, and the slope top side of the model side slope is attached to the water permeable plate.
A V-shaped groove is formed in the slope surface of one side, close to the toe, of the model slope.
The V-shaped fracture model is inserted in the V-shaped groove and comprises a V-shaped bracket and qualitative filter paper; two side plates of the V-shaped bracket are uniformly provided with water permeable holes; qualitative filter paper is placed on the inner wall surface of the V-shaped bracket close to the side of the slope foot for collecting montmorillonite dissolved substances.
The intelligent dynamic water supply system comprises a water supply device, a water inlet valve, a water level sensor, a water drain valve and a waste liquid collecting box.
The water inlet valve is arranged at the top of the water storage tank and is connected with the water inlet device through a hose.
The drain valve is arranged at the bottom of the model box close to the toe and is connected with the waste liquid collecting box through a hose.
The water level sensor is used for detecting the water level of the water storage tank and is connected with the water supply device.
The water supply device is connected with the waste liquid collecting box through a water absorbing hose.
The model box is made of organic glass, and a reinforcing device is arranged on the outer side of the model box.
The reinforcing device comprises channel steel and a threaded pull rod; the channel-section steels are symmetrically arranged on the outer side of the length side of the model box in groups, and the threaded pull rods are arranged at the top and the bottom of each group of channel-section steels and used for fastening and connecting the two channel-section steels in each group.
The slope ratio of the model side slope is 1: 2-1: 4.
The distance between the V-shaped groove and the slope toe is 300 mm.
The invention also provides a test method for observing the swelling soil montmorillonite dissolution filling process, which can continuously observe the filling process of substances in the swelling soil primary fissure surface under the seepage condition for a long time and can collect, detect and analyze the substances in real time.
A test method for observing the swelling soil montmorillonite dissolution filling process comprises the following steps.
Step 1, preparing soil materials of the model slope: and (3) air-drying the expansive soil taken back on site, smashing, sieving, adding water to set water content, uniformly mixing, and sealing to form the model slope soil material.
And 3, laying the V-shaped fracture model, which comprises the following steps.
Step 31, preparing a V-shaped groove: and (3) taking out soil bodies on the slope surface of the model side slope prepared in the step (2) and close to the slope toe according to the size of the prefabricated crack to form a V-shaped groove.
Step 32, inserting the V-shaped support: and inserting the V-shaped support provided with the water permeable holes into the formed V-shaped groove to ensure that the V-shaped support is in complete contact with soil bodies on two sides.
Step 33, qualitative filter paper placement: qualitative filter paper is placed on the inner wall surface of the V-shaped bracket close to the side of the slope foot for collecting montmorillonite dissolved substance.
And 4, carrying out seepage test, comprising the following steps.
Step 41, water storage: and opening the water supply device, and storing water in the water storage tank through the water inlet valve.
Step 42, forming a stable seepage field: water in the water storage tank permeates into the model slope through the permeable plate, and the water inlet speed is controlled through the water level sensor, so that the water body in the water storage tank is kept at a stable water level, and a stable seepage field is formed in the model slope; in the seepage process, the montmorillonite dissolved out from the V-shaped groove is adsorbed on the qualitative filter paper.
Step 43, collecting seepage wastewater: and opening the drain valve, connecting the drain valve with the waste liquid collecting box through a hose, and discharging the waste water seeped out from the downstream of the model slope.
In step 7, the physical properties analyzed include grain composition, limit moisture content, and free expansion rate.
In step 7, the chemical properties of the mineral components are analyzed by X-ray diffraction.
In step 6, after each montmorillonite precipitate is collected, weighing is carried out, and a curve of time and montmorillonite precipitate amount is established.
The invention has the following beneficial effects:
1. the invention considers the dynamic filling process of the swelling soil montmorillonite dissolved substance under the seepage effect for the first time. The test device can simulate and observe the filling process of the swelling soil montmorillonite dissolved substance for a long time and continuously. Has pioneering significance for researching the filling process of the montmorillonite dissolved substance in the expansive soil slope. The experimental results can be used for analyzing the filling process of montmorillonite in cracks in the expansive soil slope and researching the long-term instability mechanism of the expansive soil slope.
2. In the test process, the precipitation component and the montmorillonite content in the cracks are tested at certain intervals under the conditions of controlling certain water level difference, seepage water flow temperature, the montmorillonite content of the test slope expansive soil and the like.
3. This testing device passes through water level inductor response catch basin water level, and when the water level dropped to predetermineeing the water level, the accessible water supply installation collected the water in the waste liquid collecting tank and circulated the moisturizing to keep stable seepage flow condition realizes intelligent dynamic control, has the advantage of simplifying experimental operation flow, accurate control test condition, water economy resource.
4. In the test process, factors such as the temperature of the seepage water flow, the difference of water heads of upstream and downstream, the montmorillonite content of the slope expansive soil and the like are changed, and the sedimentation rate and the form change of montmorillonite dissolved substances in cracks are tested. So as to analyze the source and filling rule of the filler in the cracks in the actual expansive soil slope.
5. The device is fixed with the threaded pull rod through the channel steel, and the device has the advantages of simple integral structure, no special requirement, low cost, convenience in disassembly and assembly and capability of being repeatedly used.
Drawings
FIG. 1 is a schematic view showing the structure of a test apparatus for observing the swelling soil montmorillonite dissolution filling process according to the present invention.
FIG. 2 shows a schematic structural diagram of a V-shaped fracture model in the present invention.
Fig. 3 shows a schematic structure diagram of the intelligent dynamic water supply system in the invention.
Among them are: 1: foot seat, 2: drain valve, 3: mold box, 4 channel steel: ,5: model slope, 6: qualitative filter paper, 7: v-fracture model, 8: threaded pull rod, 9: porous plate, 10: water level sensor, 11: reservoir, 12: water inlet valve, 13: water supply device, 14: and a waste liquid collecting box.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
As shown in figure 1, the test device for observing the swelling soil montmorillonite dissolution filling process comprises a model box 3, a model slope 5, a V-shaped crack model 7, a water permeable plate 9 and an intelligent dynamic water supply system.
The model box is of a cuboid structure and is preferably made of transparent organic glass materials. The mold box preferably has a length of 1000mm, a width of 120mm and a height of 250 mm. The wall thickness of the mold box is preferably 12 mm.
The bottom of the model box is provided with a foot seat 1, and the outer side of the model box is preferably provided with a reinforcing device.
The reinforcing device preferably comprises a channel steel 4 and a threaded pull rod 8; the channel-section steels are symmetrically arranged on the outer side of the length side of the model box in groups, and the threaded pull rods are arranged at the top and the bottom of each group of channel-section steels and used for fastening and connecting the two channel-section steels in each group.
The channel steel is preferably 5#, and the channel steel is preferably in size: the waist height is 50mm, the leg width is 37mm, the waist thickness is 4.5mm, and the channel steel height is 300 mm. In this application, the channel-section steel is preferred 4, and 4 channel-section steels are respectively symmetrical to be arranged in each third department about the mold box, and trompil about the channel-section steel is fixed by two screw thread pull rods, can dismantle the channel-section steel according to the demand in the testing process.
The permeable plate is inserted in the model box and is parallel to the width side of the model box. The permeable plate is uniformly distributed with drilled holes, the size diameter of each hole is preferably 1mm, the interval is 2mm, and the wall thickness of the permeable plate is preferably 8 mm.
The water permeable plate divides the model box into a water storage tank 11 and a seepage test cavity, and the volume of the seepage test cavity is larger than that of the water storage tank. The size of the water storage tank is preferably as follows: the length is 60mm, the width is 120mm, and the height is 250 mm. The water storage tank can continuously supply water for the seepage test cavity.
The slope ratio of the model side slope is preferably 1: 2-1: 4, and more preferably 1: 3. The internal seepage diameters of the model slopes with different slope ratios are different, so that the dissolution filling process in the model slopes is influenced, and the change of the dissolution filling substance on the fracture properties influences the result of slope stability analysis.
The model side slope is arranged in the seepage test cavity, the horizontal distance of the model side slope is equal to the length of the seepage test cavity, and the slope top side of the model side slope is attached to the water permeable plate.
A V-shaped groove is formed in the slope surface of one side, close to the toe, of the model slope, and the distance between the V-shaped groove and the toe is preferably 300 mm. The included angle of the V-shaped groove can be changed and set as required.
The V-shaped fracture model is inserted into the V-shaped groove and comprises a V-shaped bracket and qualitative filter paper 6 as shown in figure 2.
The V type support is preferably formed by connecting two square stainless steel aluminum plates, and the included angle formed by the two square stainless steel aluminum plates is preferably changed according to the requirement.
The width of the square stainless steel aluminum plate is preferably 100mm, the length of the square stainless steel aluminum plate is preferably 100mm, the wall thickness of the square stainless steel aluminum plate is preferably 1mm, and water permeable holes with the diameter of preferably 0.1mm are uniformly distributed on the square stainless steel aluminum plate.
Qualitative filter paper is placed on the inner wall surface of the V-shaped bracket close to the side of the slope foot and is used for collecting montmorillonite dissolved matters brought out by the soil body through leaching.
As shown in fig. 3, the intelligent dynamic water supply system includes a water supply device 13, a water inlet valve 12, a water level sensor 10, a drain valve 2 and a waste liquid collection tank 14.
The water inlet valve is arranged at the top of the water storage tank and is connected with the water inlet device through a hose.
The drain valve has 2 preferably, all sets up in the mold box bottom that is close to the toe, and the drain valve is connected with the waste liquid collecting box through the hose.
The water level sensor is preferably located in the water storage tank and used for detecting the water level of the water storage tank, and the water level sensor is connected with the water supply device.
The water supply device is connected with the waste liquid collecting box through a water absorbing hose.
When the water level in the water storage tank drops, the water supply device can automatically pump water from the waste liquid collecting tank and inject the water into the water storage tank until the water level reaches a preset water level, so that stable seepage in the model side slope is maintained, and a set of complete intelligent dynamic water supply system is formed.
A test method for observing the swelling soil montmorillonite dissolution filling process comprises the following steps.
Step 1, preparing soil materials of the model slope: and (3) air-drying the expansive soil taken back on site, breaking the expansive soil, preferably sieving the expansive soil by using a 5mm sieve, adding water to the set optimal water content, uniformly mixing, preferably sealing for 24 hours, and forming the model slope soil material.
And 3, laying the V-shaped fracture model, which comprises the following steps.
Step 31, preparing a V-shaped groove: and (3) taking out soil bodies on the slope surface of the model side slope prepared in the step (2) and close to the slope toe according to the size of the prefabricated crack to form a V-shaped groove. The distance between the V-shaped groove and the toe is preferably 300 mm.
Step 32, inserting the V-shaped support: and inserting the V-shaped support provided with the water permeable holes into the formed V-shaped groove to ensure that the V-shaped support is in complete contact with soil bodies on two sides.
Step 33, qualitative filter paper placement: qualitative filter paper is placed on the inner wall surface of the V-shaped bracket close to the side of the slope foot for collecting montmorillonite dissolved substance. The qualitative filter paper size preferably conforms to the wall size of the V-groove.
And 4, carrying out seepage test, comprising the following steps.
Step 41, water storage: and opening the water supply device, and storing water in the water storage tank through the water inlet valve.
Step 42, forming a stable seepage field: water in the water storage tank permeates into the model slope through the permeable plate, and the water inlet speed is controlled through the water level sensor, so that the water body in the water storage tank is kept at a stable water level, and a stable seepage field is formed in the model slope; in the seepage process, the montmorillonite dissolved out from the V-shaped groove is adsorbed on the qualitative filter paper.
Step 43, collecting seepage wastewater: and opening the drain valve, connecting the drain valve with the waste liquid collecting box through a hose, and discharging the waste water seeped out from the downstream of the model slope.
And after each montmorillonite precipitate is collected, preferably weighing, and establishing a curve of time and montmorillonite precipitate amount for researching the dynamic filling process and the long-term destabilization mechanism of the expansive soil slope.
The dynamic filling process in the invention is to establish the function of the change of the dissolved matter components along with the time through the test, and the quantitative relation of the change of the strength and the slope stability along with the time can be established by combining the subsequent strength test of the samples with different material contents.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.
Claims (10)
1. A test device for observing the swelling soil montmorillonite dissolution filling process is characterized in that: the system comprises a model box, a model side slope, a V-shaped crack model, a permeable plate and an intelligent dynamic water supply system;
the model box is of a cuboid structure, and the permeable plate is inserted in the model box and is parallel to the width side edge of the model box; the water permeable plate divides the model box into a water storage tank and a seepage test cavity, and the volume of the seepage test cavity is larger than that of the water storage tank;
the model side slope is arranged in the seepage test cavity, the horizontal distance of the model side slope is equal to the length of the seepage test cavity, and the slope top side of the model side slope is attached to the water permeable plate;
a V-shaped groove is formed in the slope surface of one side of the model slope, which is close to the toe;
the V-shaped fracture model is inserted in the V-shaped groove and comprises a V-shaped bracket and qualitative filter paper; two side plates of the V-shaped bracket are uniformly provided with water permeable holes; qualitative filter paper is placed on the inner wall surface of the V-shaped bracket close to the side of the slope foot and is used for collecting montmorillonite dissolved substances;
the intelligent dynamic water supply system comprises a water supply device, a water inlet valve, a water level sensor, a water drain valve and a waste liquid collecting box;
the water inlet valve is arranged at the top of the water storage tank and is connected with the water supply device through a hose;
the drain valve is arranged at the bottom of the model box close to the toe and is connected with the waste liquid collecting box through a hose;
the water level sensor is used for detecting the water level of the water storage tank and is connected with the water supply device.
2. The test apparatus for observing a swelling clay montmorillonite dissolution filling process according to claim 1, characterized in that: the water supply device is connected with the waste liquid collecting box through a water absorbing hose.
3. The test apparatus for observing a swelling soil montmorillonite dissolution filling process according to claim 1 or 2, characterized in that: the model box is made of organic glass, and a reinforcing device is arranged on the outer side of the model box.
4. The test apparatus for observing a swelling clay montmorillonite dissolution filling process according to claim 3, characterized in that: the reinforcing device comprises channel steel and a threaded pull rod; the channel-section steels are symmetrically arranged on the outer side of the length side of the model box in groups, and the threaded pull rods are arranged at the top and the bottom of each group of channel-section steels and used for fastening and connecting the two channel-section steels in each group.
5. The test apparatus for observing a swelling clay montmorillonite dissolution filling process according to claim 1, characterized in that: the slope ratio of the model side slope is 1: 2-1: 4.
6. The test apparatus for observing a swelling clay montmorillonite dissolution filling process according to claim 1, characterized in that: the distance between the V-shaped groove and the slope toe is 300 mm.
7. A test method for observing the swelling soil montmorillonite dissolution filling process is characterized in that: the method comprises the following steps:
step 1, preparing soil materials of the model slope: air-drying the expansive soil taken back on site, smashing, sieving, adding water to set water content, uniformly mixing and sealing to form a model slope soil material;
step 2, preparing a model slope: filling and compacting the model side slope soil material prepared in the step 1 in a seepage test cavity in a layered manner, and after filling of each layer is finished, roughening the surface of each layer to bond the layers into a whole; wherein, the top side of the model side slope is tightly attached to the water permeable plate;
step 3, laying a V-shaped fracture model, comprising the following steps:
step 31, preparing a V-shaped groove: taking out soil bodies on the slope surface of the model side slope prepared in the step 2 and close to the slope toe according to the size of the prefabricated crack to form a V-shaped groove;
step 32, inserting the V-shaped support: inserting a V-shaped bracket provided with water permeable holes into the formed V-shaped groove to ensure that the V-shaped bracket is completely contacted with soil bodies on two sides;
step 33, qualitative filter paper placement: placing qualitative filter paper on the inner wall surface of the V-shaped bracket close to the side of the slope leg for collecting montmorillonite dissolved substances;
and 4, carrying out seepage test, comprising the following steps:
step 41, water storage: opening the water supply device, and storing water in the water storage tank through the water inlet valve;
step 42, forming a stable seepage field: water in the water storage tank permeates into the model slope through the permeable plate, and the water inlet speed is controlled through the water level sensor, so that the water body in the water storage tank is kept at a stable water level, and a stable seepage field is formed in the model slope; in the seepage process, montmorillonite dissolved out from the V-shaped groove is adsorbed on qualitative filter paper;
step 43, collecting seepage wastewater: opening a drain valve, connecting the drain valve with a waste liquid collecting box through a hose, and discharging the waste water seeped out from the downstream of the model slope;
step 5, observing a saturation line: observing the position of a saturation line in the side slope of the model, and starting to record the seepage time after the saturation line is stable;
step 6, collecting montmorillonite precipitate: taking out the qualitative filter paper in the V-shaped bracket according to a set time interval and replacing the qualitative filter paper with new qualitative filter paper; then, drying the qualitative filter paper taken out of the V-shaped bracket and collecting montmorillonite precipitate;
step 7, analyzing the properties of the montmorillonite precipitate: the montmorillonite precipitate collected in step 6 was subjected to physical and chemical property analysis.
8. The test method for observing the swelling clay montmorillonite dissolution filling process according to claim 7, characterized in that: in step 7, the physical properties analyzed include grain composition, limit moisture content, and free expansion rate.
9. The test method for observing the swelling soil montmorillonite dissolution filling process according to claim 7 or 8, characterized in that: in step 7, the chemical properties of the mineral components are analyzed by X-ray diffraction.
10. The test method for observing the swelling clay montmorillonite dissolution filling process according to claim 7, characterized in that: in step 6, after each montmorillonite precipitate is collected, weighing is carried out, and a curve of time and montmorillonite precipitate amount is established.
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| CN103884632A (en) * | 2014-02-20 | 2014-06-25 | 环境保护部南京环境科学研究所 | Field monitoring system for infiltration property of wild hillside soil |
| CN103954740A (en) * | 2014-04-11 | 2014-07-30 | 中国科学院武汉岩土力学研究所 | Expansive-soil slope hygroscopic deformation model experiment method and system |
| CN204882547U (en) * | 2015-08-12 | 2015-12-16 | 河海大学 | Side slope model test device is consolidated to grouting |
| CN205049563U (en) * | 2015-10-15 | 2016-02-24 | 袁晓龙 | Landslide area ground material multi -parameter monitoring system |
| CN206594160U (en) * | 2017-02-17 | 2017-10-27 | 山西省交通科学研究院 | Experimental rig applied to slope soil water translocation and deformation |
| CN207675761U (en) * | 2018-01-09 | 2018-07-31 | 浙江工业职业技术学院 | A kind of geotechnical engineering slope model test case |
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| CN103884632A (en) * | 2014-02-20 | 2014-06-25 | 环境保护部南京环境科学研究所 | Field monitoring system for infiltration property of wild hillside soil |
| CN103954740A (en) * | 2014-04-11 | 2014-07-30 | 中国科学院武汉岩土力学研究所 | Expansive-soil slope hygroscopic deformation model experiment method and system |
| CN204882547U (en) * | 2015-08-12 | 2015-12-16 | 河海大学 | Side slope model test device is consolidated to grouting |
| CN205049563U (en) * | 2015-10-15 | 2016-02-24 | 袁晓龙 | Landslide area ground material multi -parameter monitoring system |
| CN206594160U (en) * | 2017-02-17 | 2017-10-27 | 山西省交通科学研究院 | Experimental rig applied to slope soil water translocation and deformation |
| CN207675761U (en) * | 2018-01-09 | 2018-07-31 | 浙江工业职业技术学院 | A kind of geotechnical engineering slope model test case |
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| 干湿循环作用下纤维加筋膨胀土的裂隙及强度特性研究;顾欣 等;《南京工业大学学报（自然科学版）》;20160531;第38卷(第3期);全文 * |
| 湿干循环下压实膨胀土裂隙扩展规律研究;黎伟 等;《岩土工程学报》;20140731;第36卷(第7期);全文 * |
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