CN111912760A - Test device and test method for simulating contact surface seepage coupling characteristics - Google Patents
Test device and test method for simulating contact surface seepage coupling characteristics Download PDFInfo
- Publication number
- CN111912760A CN111912760A CN202010683936.4A CN202010683936A CN111912760A CN 111912760 A CN111912760 A CN 111912760A CN 202010683936 A CN202010683936 A CN 202010683936A CN 111912760 A CN111912760 A CN 111912760A
- Authority
- CN
- China
- Prior art keywords
- water
- cavity
- soil sample
- bottom plate
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
Abstract
The invention provides a test device and a test method for simulating seepage coupling characteristics of a contact surface, which belong to the technical field of earth-rock dam construction. The device solves the problems of high loading torque, difficult coupling loading, difficult water stopping and the like faced by a test device for simulating the stress-deformation-seepage coupling characteristic between the original-grade gravel soil core wall material of the earth-rock dam and the contact surface of the bank slope, and solves the problems of small geometric dimension and poor accuracy of the obtained test data of the existing equipment.
Description
Technical Field
The invention relates to the technical field of mechanical property testing of earth and rockfill dam construction materials, in particular to a test device and a test method for simulating deformation-seepage coupling property of an earth and rockfill dam core wall and bank slope contact surface.
Background
One of the main causes of core earth-rock dam accidents is the osmotic destruction of the core impervious body. The contact surface of the core wall impervious body and the bank slope has strong interaction, and in the existing case of sudden seepage or dam break of the earth-rock dam, seepage damage basically occurs at the contact surface of the core wall impervious body and the bank slope. The combined action of mutually orthogonal high water seepage pressure, large deformation and certain normal stress exists on the contact surface of the core wall seepage-proofing body and the bank slope, and whether the action can generate a weak surface or even generate seepage damage due to the water seepage pressure and deformation is a very concern problem in the engineering field.
At present, because of the limitation of test means, the research on the impermeability characteristics of the contact surface of the core wall impervious body and the bank slope is less, one type of test device can not consider the relative deformation of the core wall impervious body and the bank slope, the deformation-seepage condition of the other type of test device can not reflect the actual working state of the dam body, and the original-grade gravel soil test with the maximum grain diameter close to 60mm can not be carried out, most of the existing test devices have the defects of small size, low pressure, limited deformation and the like, so that the accuracy of test data is low, the reference significance is not large, and a test device capable of accurately simulating the actual deformation-seepage coupling characteristic between the earth-rock dam core wall and the bank slope contact surface is urgently needed to provide accurate mechanical reference data for actual engineering, the service life of the core earth-rock dam can be prolonged by improving the engineering structure and the construction process, and the accident rate of the core earth-rock dam is reduced.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a test device and a test method for simulating the seepage coupling characteristic of a contact surface, and solves the problem that the test data obtained by the test device for simulating the stress-deformation-seepage coupling characteristic between the original graded gravel soil core material of the earth-rock dam and the contact surface of the bank slope in the prior art is poor in accuracy.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the test device comprises a bottom plate and a cylinder body detachably connected to the bottom plate, wherein the top end of the cylinder body is adjustably and hermetically connected with a top cover, the cylinder body, the top cover and the bottom plate surround to form a test cavity, the test cavity comprises an original-grade soil sample cavity and a pressure cavity hermetically arranged on the periphery of the original-grade soil sample cavity, and the pressure cavity is connected with a first water pressure source through a pressure cavity pressurizing channel;
the primary grading soil sample cavity is separated from the pressure cavity through an elastic sealing layer, a concrete shaft is arranged in the middle of the primary grading soil sample cavity, two ends of the concrete shaft are respectively and rotatably connected to the top cover and the bottom plate, the concrete shaft is connected to a motor through a horizontal belt transmission device, and the motor is connected with a rotating speed regulator;
one side of the bottom plate, which is adjacent to the primary soil sample cavity, is connected with a lower permeable plate, one side of the top cover, which is adjacent to the primary soil sample cavity, is connected with an upper permeable plate, the lower permeable plate is connected with a second water pressure source through a water seepage pressure channel, and the upper permeable plate is connected with a water outlet pipe.
The test method of the test device for simulating the contact surface seepage coupling characteristic comprises the following steps:
step 1, assembling a bottom plate, a lower porous plate and a concrete shaft, and filling water into the lower porous plate through a second water pressure source;
step 2, installing a sample preparation cylinder on the bottom plate, placing a rubber membrane along the inner wall of the sample preparation cylinder, sealing and binding the lower end of the rubber membrane on a lower porous plate, reserving the length of not less than 10cm at the upper end of the rubber membrane, turning outwards the upper end of the sample preparation cylinder, and pumping air between the rubber membrane and the inner wall of the sample preparation cylinder to enable the rubber membrane to be tightly attached to the inner wall of the sample preparation cylinder;
step 4, mounting an adjustable supporting mechanism on the bottom plate, supporting the upper water permeable plate and the top cover above the bottom plate vertically through the adjustable supporting mechanism, adjusting the position of a positioning nut to enable the bottom surface of the upper water permeable plate to be in contact with the top surface of the soil sample, and then screwing a sealing nut and a locking nut to fix the position of the top cover;
step 6, connecting a pressure cavity pressurization channel with a first water pressure source, connecting a body variable pipe on a water outlet pipe, starting a first water pressure source and a second water pressure source to respectively pressurize the pressure cavity and a lower permeable plate, applying normal stress to the soil sample by the pressure cavity, applying water seepage pressure to the soil sample by the lower permeable plate, and completing a soil sample saturation test when the water quantity measured by the body variable pipe is the same as the water quantity permeated into the soil sample measured by the second water pressure source;
and 7, controlling the first hydraulic pressure source to apply a set normal stress to the soil sample, after the sample is solidified, controlling the second hydraulic pressure source to apply a set hydraulic pressure drop to the soil sample, after seepage is stable, starting a motor, adjusting the rotating speed of a concrete shaft to a set value through a rotating speed regulator, and measuring the water quantity value entering the soil sample and the water quantity value of the discharged soil sample.
The invention has the beneficial effects that: the primary soil sample cavity is used for placing the primary gravel soil core material of the earth and rockfill dam, and meanwhile, the concrete shaft is connected with a motor provided with a multi-stage speed reducer through a horizontal belt transmission device, so that the height of the test device is reduced, the large torque generated by the multi-stage speed reducer can drive the concrete shaft to rotate in the primary gravel soil core material of the earth and rockfill dam, the actual condition of the contact surface between the impervious body of the earth and rockfill dam and the bank slope can be accurately simulated, the motor drives the concrete shaft to rotate, the shear displacement can be generated on the contact surface between the concrete shaft and the soil sample, the deformation of the contact surface is simulated, the shear displacement is generated by rotation, the specified size and the shear displacement at the specified speed rate can be accurately provided, the size of the shear displacement can be any value from zero to infinite, and the deformation of any value can be simulated.
The pressure chamber is separated from the original-grade soil sample chamber through the elastic sealing layer, the sealing performance of the pressure chamber can be guaranteed through the elastic sealing layer, meanwhile, the acting force of air pressure on the soil sample in the pressure chamber can not be influenced due to good elasticity, the pressure chamber is arranged on the periphery of the original-grade soil sample chamber, stress applied to the soil sample by the air pressure in the pressure chamber is more uniform, and different positive pressures received by the soil sample can be accurately simulated through regulating and controlling the pressure value of the air filled into the pressure chamber.
The last porous disk that the upper and lower end of former level join in marriage soil sample chamber set up can store up water and provide the route for the seepage water with lower porous disk, and the water pressure of exerting on the porous disk under through the regulation and control can simulate the different seepage pressure that the soil sample received, and the difference between the porous disk water yield can draw the water conservancy ratio in the soil sample through gathering the water yield that lets in down the porous disk and flowing out and going up the porous disk water yield and drop.
Shear displacement generated by rotation of a concrete shaft is along the tangential direction of the contact surface, stress generated by air pressure in the pressure cavity is along the radial direction of the contact surface, seepage pressure is along the axial direction of the contact surface, so that the combined action of high seepage pressure, large deformation and certain normal stress which are orthogonal to each other on the contact surface of the simulation core wall impervious body and the bank slope is realized, the value of each simulation condition can be flexibly and continuously adjusted, the simulation data is closer to the actual condition, and the obtained test data is more effective; the tangential displacement is obtained through concrete shaft pivoted angle, and normal stress and seepage flow pressure can obtain through the manometer through the water pressure value that first water pressure source and second water pressure source were applyed, and data acquisition is convenient, reliable, and whole test device simple structure, and easily operation can greatly reduced experimental degree of difficulty.
Drawings
FIG. 1 is a schematic diagram of a test apparatus for simulating contact surface seepage coupling characteristics.
Wherein, 1, a cylinder body; 2. a top cover; 3. a base plate; 4. a test chamber; 41. a primary grading soil sample cavity; 42. a pressure chamber; 5. an elastomeric sealing layer; 6. a concrete shaft; 61. a rotating shaft; 62. a concrete pipe; 7. a horizontal belt drive; 71. an intermediate shaft; 72. a driven pulley; 73. a driving pulley; 74. a synchronous belt; 8. a motor; 81. a first-stage speed reducer; 82. a secondary speed reducer; 9. a lower permeable plate; 10. a water permeable plate is arranged; 11. a water seepage pressure channel; 12. a water outlet pipe; 13. an adjustable support mechanism; 131. a support screw; 132. positioning a nut; 133. a seal nut; 134. locking the nut; 14. a frame; 15. a pressure chamber pressurization passage; 16. an operation platform.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in figure 1, the test device for simulating the contact surface seepage coupling characteristic comprises a cylinder body 1, a top cover 2 and a bottom plate 3, wherein the top cover 2 and the bottom plate 3 are detachably connected to two ends of the cylinder body 1, the bottom plate 3 is connected to a rack 14 through a threaded fastener, a flange plate is integrally formed or welded at the bottom end of the cylinder body 1 and is connected with the bottom plate 3 through a threaded fastener, and a connecting gap between the flange plate and the bottom plate 3 is sealed through an O-shaped sealing ring. The outer circumferential surface of the top cover 2 and the inner wall surface of the cylinder body 1 are sealed by an O-shaped sealing ring.
The cylinder body 1, the top cover 2 and the bottom plate 3 surround to form a test chamber 4, the test chamber 4 comprises an original-grade soil sample chamber 41 and a pressure chamber 42 which is hermetically arranged on the periphery of the original-grade soil sample chamber 41, and the original-grade soil sample chamber 41 and the pressure chamber 42 are separated by an elastic sealing layer 5. The elastic sealing layer 5 is a rubber film, and two ends of the rubber film are respectively connected to the lower porous plate 9 and the upper porous plate 10 in a sealing manner. Can hold external diameter not less than 700mm in the experimental chamber 4, highly not less than 300mm soil sample, the internal diameter of soil sample is the same with the external diameter of concrete axle 6 for experimental soil sample of using is enough big so that can dispose according to the former gradation of earth and rockfill dam core wall in experimental chamber 4, improves the validity of test data.
In the radial direction, the pressure chamber 42 is a space between the inner wall of the cylinder body 1 and the elastic sealing layer 5, and the structural joints around the pressure chamber 42 ensure the sealing performance of the pressure chamber through O-shaped sealing rings. The pressure chamber 42 is connected to a first water pressure source through a pressure chamber pressurizing passage 15 provided in the bottom plate 3, the first water pressure source is a large-scale pressure/volume controller for water, and an air pressure gauge for detecting output pressure and a regulator for regulating the output pressure are provided in the air compressor.
The top surface end of bottom plate 3 is connected with lower porous disk 9 through threaded fastener, and the bottom surface end of top cap 2 is connected with porous disk 10 through threaded fastener, goes up porous disk 10 and lower porous disk 9 upper and lower symmetry and sets up in the top and the bottom of former level and join in marriage soil sample chamber 41. Go up porous disk 10 and lower porous disk 9 and all include water storage chamber and even water board, even water board goes up intensive distribution has the hole of permeating water that communicates water storage chamber and former level and join in marriage soil sample chamber 41, infiltration pressure channel 11 and lower porous disk 9's water storage chamber intercommunication, outlet pipe 12 and the water storage chamber intercommunication of last porous disk 10. The lower porous plate 9 is connected with a second water pressure source through a water seepage pressure channel 11, the second water pressure source is a high-pressure water supply device, an output pressure detection meter and an output water quantity measurement meter are arranged on the second water pressure source, and a water outlet pipe 12 is connected to the upper porous plate 9.
The top cover 2 is supported on the bottom plate 3 through a plurality of adjustable supporting mechanisms 13 which are uniformly distributed along the circumference, each adjustable supporting mechanism 13 comprises a supporting screw rod 131, the bottom end of each supporting screw rod 131 is connected to the bottom plate 3 in a threaded mode, the top end of each supporting screw rod 131 penetrates out of the top cover 2 and is sequentially connected with a sealing nut 133 and a locking nut 134, and a positioning nut 132 is connected to the supporting screw rods 131 between the bottom plate 3 and the top cover 2 in a threaded mode. And O-shaped sealing rings are arranged on the contact surfaces of the sealing nut 133, the top cover 2 and the support screw 131.
The middle part of the primary grading soil sample cavity 41 is provided with a concrete shaft 6, the concrete shaft 6 comprises a rotating shaft 61 and a concrete pipe 62 fixed in the middle part of the rotating shaft 61, the axial length of the concrete pipe 62 is not less than the height of the primary grading soil sample cavity 41, and the outer diameter of the concrete pipe 62 is not less than 100 mm. Two ends of the rotating shaft 61 penetrate out of the top cover 2 and the bottom plate 3 respectively, and a dynamic sealing element is arranged between the outer cylindrical surface of the rotating shaft 61 and the central hole surfaces of the top cover 2 and the bottom plate 3.
The bottom end of the rotating shaft 61 is connected to a motor 8 through a horizontal belt transmission device 7, and the motor 8 is connected with a rotating speed regulator. The horizontal belt transmission device 7 comprises an intermediate shaft 71 coaxially connected with the concrete shaft 6, a driven pulley 72 is sleeved on the intermediate shaft 71, a driving pulley 73 is connected to the end of the motor 8, and a synchronous belt 74 is sleeved on the driving pulley 73 and the driven pulley 72. The output end of the motor 8 is connected with a primary speed reducer 81 and a secondary speed reducer 82 in sequence, and the driving pulley 73 is fixed on the output shaft of the secondary speed reducer 82. The first-stage speed reducer 81 and the second-stage speed reducer 82 are a single-stage cycloidal pin gear speed reducer and a double-stage cycloidal pin gear speed reducer, respectively, the reduction ratio of the single-stage cycloidal pin gear speed reducer is 71, and the reduction ratio of the double-stage cycloidal pin gear speed reducer is 4189. The motor torque amplified by the two-stage speed reducer combined horizontal belt transmission device 7 needs to meet the requirements of overcoming the surface friction of a concrete rod with the normal stress of 5MPa, the friction angle of 45 degrees, the height of 300mm and the diameter of 100 mm.
The test device for simulating the seepage coupling characteristic of the contact surface can bear a normal stress of not less than 5MPa and a seepage head of not less than 300 m.
The test method of the test device for simulating the contact surface seepage coupling characteristic comprises the following steps:
step 1, assembling the bottom plate 3, the lower permeable plate 9 and the concrete shaft 6 according to the connection relationship, and filling water into the lower permeable plate 9 through a second water pressure source.
Step 2, installing a sample preparation cylinder on the bottom plate 3, placing a rubber membrane along the inner wall of the sample preparation cylinder, sealing and binding the lower end of the rubber membrane on a lower porous plate 9, reserving the length of not less than 10cm at the upper end of the rubber membrane, turning outwards at the top end of the sample preparation cylinder, wherein the sample preparation cylinder is a semi-tubular piece connected by two flanges, folding along the radial direction to form a cylindrical sample preparation space, arranging a suction hole on the sample preparation cylinder, and connecting the suction hole with a suction pump to remove air between the rubber membrane and the inner wall of the sample preparation cylinder so as to enable the rubber membrane to be tightly attached to the inner wall of the sample preparation cylinder.
And 3, tamping the core wall soil between the sample preparation cylinder and the concrete shaft 6 according to the design gradation, the dry density and the water content of the core wall soil to form a soil sample, wherein preferably, the outer diameter of the soil sample is 700mm, the height of the soil sample is 300mm, and the outer diameter of the concrete pipe 62 is 100mm, and the height of the concrete pipe is 300 mm.
And 4, installing an adjustable supporting mechanism 13 on the bottom plate 3, supporting the upper permeable plate 10 and the top cover 2 vertically above the bottom plate 3 through the adjustable supporting mechanism 13, adjusting the position of a positioning nut 132 to enable the bottom surface of the upper permeable plate 10 to be in contact with the top surface of the soil sample, and then screwing a sealing nut 133 and a locking nut 134 to fix the position of the top cover 2. The positions of the upper permeable plate 10 and the top cover 2 are adjusted by adjusting the position of the positioning nut 132, so that the seepage length is guaranteed to be the soil sample height, and the seepage length is unchanged in the test process.
And 5, sealing and binding the upper end of the rubber film on the upper porous plate 10, dismantling the sample preparation cylinder, pressing the cylinder body 1 onto the bottom plate 3 from top to bottom along the outer side of the top cover 2 and fixedly connecting the cylinder body 1 and the top cover 2 in a compression joint process.
And 6, connecting the pressure cavity pressurizing channel 15 with a first water pressure source, connecting a body on the water outlet pipe 12 to change pipes, starting a first water pressure source and a second water pressure source to respectively pressurize the pressure cavity 42 and the lower water permeable plate 9, applying normal stress to the soil sample through the pressure cavity 42, applying water seepage pressure to the soil sample through the lower water permeable plate 9, applying normal stress of 30kPa to the soil sample by the first water pressure source, applying water seepage pressure of 10kPa to the soil sample by the second water pressure source, and finishing a soil sample saturation test when the water quantity measured by the body change pipes is the same as the water quantity permeated into the soil sample measured by the second water pressure source.
And 7, controlling the first hydraulic pressure source to apply a set normal stress to the soil sample, after the sample is solidified, controlling the second hydraulic pressure source to apply a set hydraulic pressure drop to the soil sample, after seepage is stable, starting the motor 8 and adjusting the rotating speed of the concrete shaft 6 to a set value through the rotating speed regulator, wherein the speed range of relative deformation of the contact surface of the concrete shaft 6 and the soil sample is 3.14-3140 mm/day, and calculating the deformation rate and the deformation amount of the concrete shaft on the influence of the seepage resistance by recording the water amount entering the soil sample and the water amount discharged by the soil sample.
Claims (8)
1. The test device for simulating the seepage coupling characteristic of the contact surface is characterized by comprising a bottom plate (3) and a cylinder body (1) detachably connected to the bottom plate (3), wherein the top end of the cylinder body (1) is adjustably and hermetically connected with a top cover (2), the cylinder body (1), the top cover (2) and the bottom plate (3) surround to form a test cavity (4), the test cavity (4) comprises a primary soil distribution sample cavity (41) and a pressure cavity (42) hermetically arranged on the periphery of the primary soil distribution sample cavity (41), and the pressure cavity (42) is connected with a first water pressure source through a pressure cavity pressurizing channel (15);
the primary grading soil sample cavity (41) is separated from the pressure cavity (42) through an elastic sealing layer (5), a concrete shaft (6) is arranged in the middle of the primary grading soil sample cavity (41), two ends of the concrete shaft (6) are respectively and rotatably connected to the top cover (2) and the bottom plate (3), the concrete shaft (6) is connected with a motor (8) provided with a multi-stage speed reducer through a horizontal belt transmission device (7), and the motor (8) is connected with a rotating speed regulator;
one side of the bottom plate (3) adjacent to the primary graded soil sample cavity (41) is connected with a lower water permeable plate (9), one side of the top cover (2) adjacent to the primary graded soil sample cavity (41) is connected with an upper water permeable plate (10), the lower water permeable plate (9) is connected with a second water pressure source through a water seepage pressure channel (11), and the upper water permeable plate (9) is connected with a water outlet pipe (12).
2. The testing device for simulating the contact surface seepage coupling characteristic according to claim 1, wherein the top cover (2) is supported on the bottom plate (3) through a plurality of adjustable supporting mechanisms (13) uniformly distributed along the circumference, each adjustable supporting mechanism (13) comprises a supporting screw rod (131), the bottom end of each supporting screw rod (131) is in threaded connection with the bottom plate (3), the top end of each supporting screw rod (131) penetrates through the top cover (2) and is sequentially connected with a sealing nut (133) and a locking nut (134), and a positioning nut (132) is connected onto the supporting screw rods (131) between the bottom plate (3) and the top cover (2).
3. The test device for simulating the contact surface seepage coupling characteristic according to claim 1, wherein the concrete shaft (6) comprises a rotating shaft (61) and a concrete pipe (62) fixed in the middle of the rotating shaft (61), and the axial length of the concrete pipe (62) is not less than the height of the primary grading soil sample cavity (41).
4. The test device for simulating the contact surface seepage coupling characteristic according to claim 1, wherein the elastic sealing layer (5) is a rubber membrane, and two ends of the rubber membrane are hermetically connected to the lower permeable plate (9) and the upper permeable plate (10) respectively.
5. The test device for simulating the contact surface seepage coupling characteristic according to claim 1, wherein the upper permeable plate (10) and the lower permeable plate (9) each comprise a water storage cavity and a water distribution plate, water permeable holes communicating the water storage cavity with the primary soil distribution sample cavity (41) are densely distributed on the water distribution plate, the water seepage pressure channel (11) is communicated with the water storage cavity of the lower permeable plate (9), and the water outlet pipe (12) is communicated with the water storage cavity of the upper permeable plate (10).
6. The test device for simulating the contact surface seepage coupling characteristic according to claim 1, wherein the horizontal belt transmission device (7) comprises an intermediate shaft (71) coaxially connected with the concrete shaft (6), a driven pulley (72) is sleeved on the intermediate shaft (71), a driving pulley (73) is connected to one end of the motor (8), and a synchronous belt (74) is sleeved on the driving pulley (73) and the driven pulley (72).
7. The test device for simulating the contact surface seepage coupling characteristic according to claim 6, wherein the output end of the motor (8) is sequentially connected with a primary speed reducer (81) and a secondary speed reducer (82), and the driving pulley (73) is fixed on the output shaft of the secondary speed reducer (82).
8. A test method of the test device for simulating contact surface seepage coupling characteristics according to any one of claims 1 to 7, comprising the following steps:
step 1, assembling a bottom plate (3), a lower permeable plate (9) and a concrete shaft (6), and filling water into the lower permeable plate (9) through a second water pressure source;
step 2, installing a sample preparation cylinder on the bottom plate (3), placing a rubber membrane along the inner wall of the sample preparation cylinder, sealing and binding the lower end of the rubber membrane on a lower porous plate (9), reserving the length of no less than 10cm at the upper end of the rubber membrane, turning outwards the upper end of the sample preparation cylinder, and pumping away air between the rubber membrane and the inner wall of the sample preparation cylinder to enable the rubber membrane to be tightly attached to the inner wall of the sample preparation cylinder;
step 3, tamping the core wall soil between the sample preparation cylinder and the concrete shaft (6) according to the design gradation, dry density and water content of the core wall soil to form a soil sample;
step 4, installing an adjustable supporting mechanism (13) on the bottom plate (3), supporting the upper permeable plate (10) and the top cover (2) above the bottom plate (3) through the adjustable supporting mechanism (13), adjusting the position of a positioning nut (132) to enable the bottom surface of the upper permeable plate (10) to be in contact with the top surface of the soil sample, and then screwing a sealing nut (133) and a locking nut (134) to fix the position of the top cover (2);
step 5, sealing and binding the upper end of the rubber film on the upper porous plate (10), dismantling the sample preparation cylinder, pressing the cylinder body (1) onto the bottom plate (3) from top to bottom along the outer side of the top cover (2) and fixedly connecting;
step 6, connecting a pressure cavity pressurization channel (15) with a first water pressure source, connecting a body variable pipe on a water outlet pipe (12), starting the first water pressure source and a second water pressure source to respectively pressurize a pressure cavity (42) and a lower permeable plate (9), applying normal stress to a soil sample by the pressure cavity (42), applying water seepage pressure to the soil sample by the lower permeable plate (9), and completing a soil sample saturation test when the water quantity measured by the body variable pipe is the same as the water quantity in the soil sample permeated by the second water pressure source;
and 7, controlling the first hydraulic pressure source to apply a set normal stress to the soil sample, after the sample is solidified, controlling the second hydraulic pressure source to apply a set hydraulic pressure drop to the soil sample, and after the seepage is stable, starting the motor (8) and adjusting the rotating speed of the concrete shaft (6) to a set value through the rotating speed regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010683936.4A CN111912760A (en) | 2020-07-16 | 2020-07-16 | Test device and test method for simulating contact surface seepage coupling characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010683936.4A CN111912760A (en) | 2020-07-16 | 2020-07-16 | Test device and test method for simulating contact surface seepage coupling characteristics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111912760A true CN111912760A (en) | 2020-11-10 |
Family
ID=73281197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010683936.4A Pending CN111912760A (en) | 2020-07-16 | 2020-07-16 | Test device and test method for simulating contact surface seepage coupling characteristics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111912760A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697673A (en) * | 2020-12-14 | 2021-04-23 | 中国水利水电科学研究院 | Visual test device and method for contact seepage damage of through-embankment pressureless culvert pipe |
| CN112986101A (en) * | 2021-03-30 | 2021-06-18 | 中国电建集团西北勘测设计研究院有限公司 | Earth and rockfill dam sand gravel dam building material horizontal permeability characteristic test method |
| CN115096506A (en) * | 2022-04-18 | 2022-09-23 | 中航西安飞机工业集团股份有限公司 | Pressurizing device and pressurizing method for testing embedded pressure sensor |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121887A (en) * | 2010-01-08 | 2011-07-13 | 上海市城市建设设计研究院 | Improved type triaxial apparatus |
| CN102323159A (en) * | 2011-08-12 | 2012-01-18 | 河海大学 | Permeameter for contact surface of soil and works at high stress, high hydraulic gradient, and large shear deformation |
| CN103076230A (en) * | 2013-02-05 | 2013-05-01 | 重庆交通大学 | Test method and test device of mechanical properties of soil-structure contact surface |
| CN103389249A (en) * | 2013-07-18 | 2013-11-13 | 河海大学 | Device and method for clay core wall hydraulic fracturing experiments |
| CN104132881A (en) * | 2014-07-24 | 2014-11-05 | 重庆大学 | Multi-phase fluid fracturing-seepage gas-liquid separation type experimental system of reservoir permeable medium |
| CN105784568A (en) * | 2016-05-10 | 2016-07-20 | 中国水利水电科学研究院 | Rotary shearing type contact surface anti-permeability characteristic test device |
| CN108593519A (en) * | 2018-04-27 | 2018-09-28 | 中国水利水电科学研究院 | Revolution shearing type soil and structure interface dynamic characteristic test apparatus |
| CN208091874U (en) * | 2018-04-27 | 2018-11-13 | 中国水利水电科学研究院 | Revolution shearing type soil and structure interface dynamic characteristic test apparatus |
| CN111175139A (en) * | 2020-01-10 | 2020-05-19 | 河海大学 | Visual test device and test method for simulating core wall dam hydraulic fracture |
-
2020
- 2020-07-16 CN CN202010683936.4A patent/CN111912760A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121887A (en) * | 2010-01-08 | 2011-07-13 | 上海市城市建设设计研究院 | Improved type triaxial apparatus |
| CN102323159A (en) * | 2011-08-12 | 2012-01-18 | 河海大学 | Permeameter for contact surface of soil and works at high stress, high hydraulic gradient, and large shear deformation |
| CN103076230A (en) * | 2013-02-05 | 2013-05-01 | 重庆交通大学 | Test method and test device of mechanical properties of soil-structure contact surface |
| CN103389249A (en) * | 2013-07-18 | 2013-11-13 | 河海大学 | Device and method for clay core wall hydraulic fracturing experiments |
| CN104132881A (en) * | 2014-07-24 | 2014-11-05 | 重庆大学 | Multi-phase fluid fracturing-seepage gas-liquid separation type experimental system of reservoir permeable medium |
| CN105784568A (en) * | 2016-05-10 | 2016-07-20 | 中国水利水电科学研究院 | Rotary shearing type contact surface anti-permeability characteristic test device |
| CN108593519A (en) * | 2018-04-27 | 2018-09-28 | 中国水利水电科学研究院 | Revolution shearing type soil and structure interface dynamic characteristic test apparatus |
| CN208091874U (en) * | 2018-04-27 | 2018-11-13 | 中国水利水电科学研究院 | Revolution shearing type soil and structure interface dynamic characteristic test apparatus |
| CN111175139A (en) * | 2020-01-10 | 2020-05-19 | 河海大学 | Visual test device and test method for simulating core wall dam hydraulic fracture |
Non-Patent Citations (1)
| Title |
|---|
| 徐振辞: "浅析滦河河滩迁安段砂砾卵石混合料颗粒含量对抗剪强度的影响", 《水利技术发展与实践论文集》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697673A (en) * | 2020-12-14 | 2021-04-23 | 中国水利水电科学研究院 | Visual test device and method for contact seepage damage of through-embankment pressureless culvert pipe |
| CN112697673B (en) * | 2020-12-14 | 2021-09-17 | 中国水利水电科学研究院 | Visual test device and method for contact seepage damage of through-embankment pressureless culvert pipe |
| CN112986101A (en) * | 2021-03-30 | 2021-06-18 | 中国电建集团西北勘测设计研究院有限公司 | Earth and rockfill dam sand gravel dam building material horizontal permeability characteristic test method |
| CN112986101B (en) * | 2021-03-30 | 2022-11-04 | 中国电建集团西北勘测设计研究院有限公司 | Method for testing horizontal permeability characteristic of sand gravel dam building material of earth and rockfill dam |
| CN115096506A (en) * | 2022-04-18 | 2022-09-23 | 中航西安飞机工业集团股份有限公司 | Pressurizing device and pressurizing method for testing embedded pressure sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111912760A (en) | Test device and test method for simulating contact surface seepage coupling characteristics | |
| US4579003A (en) | Instrument for testing earthen samples under triaxial load conditions | |
| CN102323159B (en) | Test method of permeameter contacting with structure in high stress, high hydraulic gradient, and large shear deformation | |
| CN107290222B (en) | Rock triaxial test equipment and method | |
| CN108918390B (en) | Device and method for forming mud film and measuring consolidation amount and air inflow of mud film | |
| CN111366468B (en) | Side pressure electrical measurement test system and test method | |
| CN106706500A (en) | Device for determining permeability of concrete | |
| CN112540010B (en) | Triaxial test device and test method for soil stress path piping | |
| CN208224038U (en) | A kind of experimental provision for surveying permeability during the rock failure mechanism of rock in real time with constant flow | |
| CN113218841A (en) | Device and method for testing reverse filtration characteristic of geotextile | |
| CN114279818B (en) | Bidirectional flexible loading and unloading ring shear device and test method thereof | |
| CN114018473B (en) | Soil pressure sensor calibrating device | |
| CN106290104A (en) | The test device of permeability without confined pressure and using method thereof | |
| CN212514167U (en) | Test device for simulating contact surface seepage coupling characteristic | |
| CN116486672B (en) | Underground structure still water buoyancy model test device | |
| CN211178852U (en) | Verification and calibration device for pore water pressure gauge | |
| CN111307688A (en) | Test system and method for determining cement soil osmotic deformation | |
| CN215263505U (en) | Multilayer soil body seepage flow is stealthily lost coupling test device | |
| CN216208442U (en) | Permeameter | |
| CN210720094U (en) | Testing device for mechanical property changes of formation slurry permeation and formation soil body | |
| CN111579377B (en) | Dynamic and static triaxial test device capable of eliminating influence of membrane embedding effect | |
| CN210269550U (en) | Concrete permeability test piece sealing device and tester | |
| CN114279927A (en) | Testing device and testing method for load and seepage coupling of large-pore concrete | |
| CN211576893U (en) | Concrete impermeability testing device | |
| CN210347405U (en) | Double-cylinder constant water head testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201110 |