CN111272979A - Saline soil water and salt migration test device and method thereof - Google Patents
Saline soil water and salt migration test device and method thereof Download PDFInfo
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- CN111272979A CN111272979A CN202010128797.9A CN202010128797A CN111272979A CN 111272979 A CN111272979 A CN 111272979A CN 202010128797 A CN202010128797 A CN 202010128797A CN 111272979 A CN111272979 A CN 111272979A
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Abstract
The invention relates to a test device and a method for water and salt migration of saline soil, wherein the device comprises a model box filled with test soil, the top of the model box is open, and a precipitation device is arranged above the model box; a vertical rotating device is arranged in the center of the bottom of the model box, and the top end of the rotating device is hinged to the bottom surface of the model box; vertical telescopic support frames are arranged around the bottom of the model box. The invention utilizes the rainfall device to simulate different rainfall working conditions under natural conditions, utilizes the sponge water absorption infiltration roadbed to simulate the winter snow accumulation and water infiltration of the road, can truly simulate the rainfall infiltration of the roadbed in the saline soil area, and provides a reliable test platform for the test research of the water and salt migration rule in the roadbed.
Description
Technical Field
The invention relates to the technical field of indoor tests of water and salt migration of saline soil, in particular to a device and a method for testing water and salt migration of saline soil.
Background
The saline soil as a special soil is widely distributed in China, is a special soil with environmental sensitivity, and the engineering property of the saline soil changes along with the change of water and temperature. In the road construction of the salinized soil distribution area, the route inevitably passes through the salinized soil road section, and various technical problems related to the characteristics of the salinized soil engineering are met. The current "highway subgrade design Specification" (JTG D30-2015) stipulates that weak saline soil and medium saline soil can be conditionally selected as subgrade fillers in the subgrade construction process.
When the salinized soil is used as a roadbed filler, the salinized soil roadbed moisture and salt migration have great influence on the strength and stability of the roadbed in a natural precipitation environment. In order to ensure the normal work of the saline soil subgrade, the water and salt migration rule of the saline soil subgrade and the intensity attenuation rule of the saline soil after the water and salt migration need to be studied in depth.
Related technical researches on high-grade highway construction in salinized soil areas in China are still in a starting stage, and an indoor water and salt migration test device and an operation method thereof for water and salt migration rule test researches on salinized soil are not available.
Disclosure of Invention
The invention aims to provide a saline soil water and salt migration test device and a method thereof, which are used for simulating roadbed rainfall infiltration in a saline soil area and carrying out test research on a water and salt migration rule in a roadbed.
The technical scheme adopted by the invention is as follows:
salinized soil water salt migration test device, its characterized in that:
the device comprises a model box filled with test soil, the top of the model box is open, and a precipitation device is arranged above the model box;
a vertical rotating device is arranged in the center of the bottom of the model box, and the top end of the rotating device is hinged to the bottom surface of the model box; vertical telescopic support frames are arranged around the bottom of the model box.
The model box is an organic glass box body and is supported by a frame type iron frame.
The organic glass box body is divided into an upper layer and a lower layer, the upper layer and the lower layer comprise upper organic glass and lower organic glass, and the joint is sealed through a sealing strip.
The glass of the organic glass box body is provided with a scale.
The bottom edge of the organic glass box body is provided with a drain hole.
The precipitation device comprises a precipitation nozzle, a water tank is connected to the precipitation device through a water pipe, and a liquid turbine flowmeter and a booster pump are sequentially arranged on the water pipe.
The rotating device comprises a vertical fixed support frame, and a rotating part is arranged at the top of the fixed support frame;
the rotating part is a spherical hinge and is hinged to the bottom surface of the model box.
The telescopic support frame is a telescopic rod component and comprises an outer rod and an inner rod.
The surface of the test soil is covered with sponge.
The test method for water and salt migration of the saline soil is characterized by comprising the following steps:
the method comprises the following steps:
the method comprises the following steps: obtaining the optimal water content and the maximum dry density of the test soil sample through a compaction test;
step two: filling the test samples in layers, filling the test soil samples into a model box according to the required compaction degree by a height control method, wherein the thickness of each layer is 5cm, and determining whether the upper organic glass plate needs to be spliced and assembled according to the height of the roadbed model; when a water and salt migration test of a local roadbed slope model is carried out, filling a soil sample according to requirements, and rotating a model box to a corresponding inclination angle;
step three: adjusting the water outlet speed of the precipitation nozzle according to the precipitation type required by the test so as to reach the specified precipitation amount in the specified time, and discharging the redundant water out of the model box through the water discharge hole; adjusting the precipitation spray head to be at a proper height;
step four: when the migration of the snow melt water into the seepage water and the salt in winter needs to be simulated, covering a layer of sponge above the roadbed model;
step five: uniformly dewatering the soil sample roadbed model within a set time by using the dewatering device so as to perform a water and salt migration test under the condition of dewatering infiltration;
step six: after the dewatering process is finished, standing the soil sample for a period of time until the moisture and the salt in the soil sample roadbed model are stable;
step seven: and taking a plurality of soil samples at different positions of the same height of the roadbed model every 5cm, measuring the water content and the salt content of the soil samples, and taking the average value as the water content and the salt content of the soil samples at the height after water and salt migration.
The invention has the following advantages:
the invention utilizes the rainfall device to simulate different rainfall working conditions under natural conditions, utilizes the sponge water absorption infiltration roadbed to simulate the winter snow accumulation and water infiltration of the road, can truly simulate the rainfall infiltration of the roadbed in the saline soil area, and provides a reliable test platform for the test research of the water and salt migration rule in the roadbed.
Drawings
Fig. 1 is a schematic diagram of a water-salt migration test of a monolithic roadbed model.
Fig. 2 is a schematic diagram of a water-salt migration test of a local roadbed slope model.
In the figure:
11-a model box, 111-an iron stand, 112-upper organic glass, 113-lower organic glass and 114-a scale;
12-rotating means, 121-fixed support, 122-telescopic support, 123-rotating means;
13-precipitation device, 131-precipitation nozzle, 132-liquid turbine flowmeter, 133-booster pump 134-water tank;
14-sponge.
Detailed Description
The present invention will be described in detail with reference to specific embodiments.
The invention relates to a test device for water and salt migration of saline soil, which comprises a model box 11 filled with test soil, wherein the top of the model box 11 is open, and a dewatering device 13 is arranged above the model box; a vertical rotating device 12 is arranged at the center of the bottom of the model box 11, and the top end of the rotating device 12 is hinged to the bottom surface of the model box 11; vertical telescopic supports 122 are provided around the bottom of the model box 11. The surface of the test soil is covered with the sponge 14, and the sponge absorbs water and permeates into the roadbed, so that the infiltration of snow and molten water in winter of the road can be simulated.
The model box 11 is an organic glass box body, has a wall thickness of 20mm, and is supported by a frame-type iron frame 111. For convenient experimental operation, the organic glass box body divides two-layer down, including top organic glass 112 and below organic glass 113, and the junction is sealed through the sealing strip, prevents that the junction from leaking. The glass of the organic glass box body is provided with a scale 114, so that the compactness of the test soil sample can be conveniently controlled by the height. The bottom edge of the organic glass box body is provided with drain holes for draining redundant water, and the interval between the drain holes is 20mm, and the aperture is 5 mm.
The precipitation device 13 comprises a precipitation nozzle 131, which is connected to a water tank 134 through a water pipe, and a liquid turbine flowmeter 132 and a booster pump 133 are sequentially arranged on the water pipe. The height and the precipitation speed of the rainfall sprayer can be adjusted. The purpose of setting up liquid turbine flowmeter is for the precipitation of accurate measurement test in-process, and the cooperation of adjustable shower nozzle and flowmeter can simulate different precipitation types like this, satisfies the experimental requirement to different precipitation types.
The rotating device 12 is arranged below the model box and on the ground and used for rotating the model box to form different inclination angles so as to simulate the water and salt migration of roadbed slopes with different gradients under the condition of rainfall infiltration. The rotating device 12 comprises a vertical fixed support frame 121, and a rotating component 123 is arranged at the top of the fixed support frame 121; the rotating member 123 is a ball hinge and is hinged to the bottom surface of the mold box 11. The telescopic support frame 122 is a telescopic rod assembly, and comprises an outer rod and an inner rod, and the telescopic rod is adjusted to ensure enough space to form different inclination angles.
The device can perform water and salt migration tests on the whole roadbed model and the local roadbed slope model, and when the whole roadbed model is tested, half roadbed models are filled in the model box, and the model box is kept in a horizontal state for testing; when a local roadbed side slope model test is carried out, firstly, a roadbed side slope model is filled in a model box in a horizontal state, then, a rotating part is adjusted, so that the inclination angle of the model box is kept consistent with that of the roadbed side slope for the test, and different inclination angles can be adjusted according to different roadbed side slope designs.
The saline soil water and salt migration test method based on the test device comprises the following steps:
the method comprises the following steps: obtaining the optimal water content and the maximum dry density of the test soil sample through a compaction test;
step two: filling the test samples in layers, filling the test soil samples into a model box according to the required compaction degree by a height control method, wherein the thickness of each layer is 5cm, and determining whether the upper organic glass plate needs to be spliced and assembled according to the height of the roadbed model; when a water and salt migration test of a local roadbed slope model is carried out, filling a soil sample according to requirements, and rotating a model box to a corresponding inclination angle;
step three: adjusting the water outlet speed of the precipitation nozzle according to the precipitation type required by the test so as to reach the specified precipitation amount in the specified time, and discharging the redundant water out of the model box through the water discharge hole; adjusting the precipitation spray head to be at a proper height;
step four: when the migration of the snow melt water into the seepage water and the salt in winter needs to be simulated, covering a layer of sponge above the roadbed model;
step five: uniformly dewatering the soil sample roadbed model within a set time by using the dewatering device so as to perform a water and salt migration test under the condition of dewatering infiltration;
step six: after the dewatering process is finished, standing the soil sample for a period of time until the moisture and the salt in the soil sample roadbed model are stable;
step seven: and taking a plurality of soil samples at different positions of the same height of the roadbed model every 5cm, measuring the water content and the salt content of the soil samples, and taking the average value as the water content and the salt content of the soil samples at the height after water and salt migration.
The invention is not limited to the examples, and any equivalent changes to the technical solution of the invention by a person skilled in the art after reading the description of the invention are covered by the claims of the invention.
Claims (10)
1. Salinized soil water salt migration test device, its characterized in that:
the device comprises a model box (11) filled with test soil, wherein the top of the model box (11) is open, and a precipitation device (13) is arranged above the model box;
a vertical rotating device (12) is arranged in the center of the bottom of the model box (11), and the top end of the rotating device (12) is hinged to the bottom surface of the model box (11); vertical telescopic support frames (122) are arranged around the bottom of the model box (11).
2. The salinized soil water and salt migration test device of claim 1, wherein:
the model box (11) is an organic glass box body and is supported by a frame-type iron frame (111).
3. The salinized soil water and salt migration test device of claim 2, wherein:
the organic glass box body is divided into an upper layer and a lower layer, the upper layer and the lower layer comprise upper organic glass (112) and lower organic glass (113), and the joint is sealed through a sealing strip.
4. The salinized soil water and salt migration test device of claim 3, wherein:
a scale (114) is arranged on the glass of the organic glass box body.
5. The salinized soil water and salt migration test device of claim 4, wherein:
the bottom edge of the organic glass box body is provided with a drain hole.
6. The salinized soil water and salt migration test device of claim 5, wherein:
the precipitation device (13) comprises a precipitation spray head (131) which is connected into the water tank (134) through a water pipe, and a liquid turbine flowmeter (132) and a booster pump (133) are sequentially arranged on the water pipe.
7. The salinized soil water and salt migration test device of claim 6, wherein:
the rotating device (12) comprises a vertical fixed support frame (121), and a rotating component (123) is arranged at the top of the fixed support frame (121);
the rotating part (123) is a spherical hinge and is hinged to the bottom surface of the model box (11).
8. The salinized soil water and salt migration test device of claim 7, wherein:
the telescopic support frame (122) is a telescopic rod component and comprises an outer rod and an inner rod.
9. The salinized soil water and salt migration test device of claim 8, wherein:
the test soil surface is covered with a sponge (14).
10. The test method for water and salt migration of the saline soil is characterized by comprising the following steps:
the method comprises the following steps:
the method comprises the following steps: obtaining the optimal water content and the maximum dry density of the test soil sample through a compaction test;
step two: filling the test samples in layers, filling the test soil samples into a model box according to the required compaction degree by a height control method, wherein the thickness of each layer is 5cm, and determining whether the upper organic glass plate needs to be spliced and assembled according to the height of the roadbed model; when a water and salt migration test of a local roadbed slope model is carried out, filling a soil sample according to requirements, and rotating a model box to a corresponding inclination angle;
step three: adjusting the water outlet speed of the precipitation nozzle according to the precipitation type required by the test so as to reach the specified precipitation amount in the specified time, and discharging the redundant water out of the model box through the water discharge hole; adjusting the precipitation spray head to be at a proper height;
step four: when the migration of the snow melt water into the seepage water and the salt in winter needs to be simulated, covering a layer of sponge above the roadbed model;
step five: uniformly dewatering the soil sample roadbed model within a set time by using the dewatering device so as to perform a water and salt migration test under the condition of dewatering infiltration;
step six: after the dewatering process is finished, standing the soil sample for a period of time until the moisture and the salt in the soil sample roadbed model are stable;
step seven: and taking a plurality of soil samples at different positions of the same height of the roadbed model every 5cm, measuring the water content and the salt content of the soil samples, and taking the average value as the water content and the salt content of the soil samples at the height after water and salt migration.
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| CN202010128797.9A CN111272979A (en) | 2020-02-28 | 2020-02-28 | Saline soil water and salt migration test device and method thereof |
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| CN202010128797.9A CN111272979A (en) | 2020-02-28 | 2020-02-28 | Saline soil water and salt migration test device and method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113252873A (en) * | 2021-05-11 | 2021-08-13 | 西安建筑科技大学 | A test monitoring devices for salt-affected soil water salt migration |
| CN114878789A (en) * | 2022-07-13 | 2022-08-09 | 成都理工大学 | Rainfall type landslide instability test device based on seepage and macroscopic damage coupling analysis |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202421181U (en) * | 2012-01-13 | 2012-09-05 | 山东大学 | Salinity aggregation regulation test model for salinized soil roadbed |
| CN104459086A (en) * | 2014-12-05 | 2015-03-25 | 内蒙古工业大学 | Soil-rock interface landslip physical model testing device as well as manufacturing method and application method thereof |
| CN204855509U (en) * | 2015-08-29 | 2015-12-09 | 西安科技大学 | Loess water translocation law analogue test system under indoor rainfall condition |
| CN105606514A (en) * | 2016-02-03 | 2016-05-25 | 中交第一公路勘察设计研究院有限公司 | Method for performing water and salt migration experiment using cylinder device with independent temperature control at both ends |
| CN205404576U (en) * | 2016-03-21 | 2016-07-27 | 盐城工学院 | Analog system is handled to coastal area villaumite stain dirt road base disease |
| CN205562514U (en) * | 2016-04-18 | 2016-09-07 | 湖南科技大学 | Hand jack is adjusted little volume and is piled domatic movable apparatus of soil box |
| CN106596378A (en) * | 2016-12-25 | 2017-04-26 | 湖南城市学院 | Device for batch experiment of soil body rainwater infiltration characteristics and use method thereof |
| CN108845108A (en) * | 2018-06-22 | 2018-11-20 | 长安大学 | The simulator and measuring method of a kind of Compacted Loess seepage flow and settlement after construction |
-
2020
- 2020-02-28 CN CN202010128797.9A patent/CN111272979A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202421181U (en) * | 2012-01-13 | 2012-09-05 | 山东大学 | Salinity aggregation regulation test model for salinized soil roadbed |
| CN104459086A (en) * | 2014-12-05 | 2015-03-25 | 内蒙古工业大学 | Soil-rock interface landslip physical model testing device as well as manufacturing method and application method thereof |
| CN204855509U (en) * | 2015-08-29 | 2015-12-09 | 西安科技大学 | Loess water translocation law analogue test system under indoor rainfall condition |
| CN105606514A (en) * | 2016-02-03 | 2016-05-25 | 中交第一公路勘察设计研究院有限公司 | Method for performing water and salt migration experiment using cylinder device with independent temperature control at both ends |
| CN205404576U (en) * | 2016-03-21 | 2016-07-27 | 盐城工学院 | Analog system is handled to coastal area villaumite stain dirt road base disease |
| CN205562514U (en) * | 2016-04-18 | 2016-09-07 | 湖南科技大学 | Hand jack is adjusted little volume and is piled domatic movable apparatus of soil box |
| CN106596378A (en) * | 2016-12-25 | 2017-04-26 | 湖南城市学院 | Device for batch experiment of soil body rainwater infiltration characteristics and use method thereof |
| CN108845108A (en) * | 2018-06-22 | 2018-11-20 | 长安大学 | The simulator and measuring method of a kind of Compacted Loess seepage flow and settlement after construction |
Non-Patent Citations (1)
| Title |
|---|
| 程永辉等: "降雨条件下膨胀土边坡失稳机理的离心模型试验研究", 《岩土工程学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113252873A (en) * | 2021-05-11 | 2021-08-13 | 西安建筑科技大学 | A test monitoring devices for salt-affected soil water salt migration |
| CN114878789A (en) * | 2022-07-13 | 2022-08-09 | 成都理工大学 | Rainfall type landslide instability test device based on seepage and macroscopic damage coupling analysis |
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