CN114755095A - Stacked ring type shearing instrument with seepage pressure control function and using method thereof - Google Patents
Stacked ring type shearing instrument with seepage pressure control function and using method thereof Download PDFInfo
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- CN114755095A CN114755095A CN202210465854.1A CN202210465854A CN114755095A CN 114755095 A CN114755095 A CN 114755095A CN 202210465854 A CN202210465854 A CN 202210465854A CN 114755095 A CN114755095 A CN 114755095A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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Abstract
The invention discloses a stacked ring type shearing instrument with seepage pressure control, which comprises a seepage adjusting module, a shearing module and a measuring module which are sequentially connected, wherein the seepage adjusting module comprises a high-pressure gas cylinder and a closed water tank which are connected through a hose, the closed water tank is connected with a water source, the measuring module comprises an electronic scale, and a water container is placed on the electronic scale. The invention discloses a laminated ring shearing instrument with seepage pressure control, which solves the problem that the laminated ring shearing instrument in the prior art cannot stably apply seepage water pressure to a sample.
Description
Technical Field
The invention belongs to the technical field of hydraulic engineering, and particularly relates to a stacked ring type shear apparatus with seepage pressure control, and a use method of the stacked ring type shear apparatus with seepage pressure control.
Background
The interaction of soil and structure is a ubiquitous mechanical problem in geotechnical engineering, a large number of shear test system platforms are available in the prior art, a shear test is an important means for researching the characteristics of a contact surface, and an important way for revealing the deformation rule of the contact surface is provided. The shear box and the data acquisition and analysis system are used for acquiring the soil and gravel deformation of the contact surface shear zone and the thickness of the shear zone in the shear test process, obtaining the change rule of the shear strength parameter of the contact surface and the soil and gravel particle migration characteristic in the shear process, quantitatively analyzing the displacement change rule of the soil and gravel particles in the shear process, and providing important support for the mechanical characteristic and structure model analysis of the contact surface.
At present, the shear strength of coarse soil with the sample grain size less than 60mm is measured, a stacked ring type shear testing machine is mostly used, a shear box of the stacked ring type shear testing machine is of a multi-layer structure and is composed of stacked steel plates and stacked rings, and therefore a plurality of shear surfaces occur to find the weakest shear surface. The stacked ring type shearing instrument is suitable for measuring different shearing strengths of coarse-grained soil bodies, but the existing stacked ring type shearing instrument cannot stably apply seepage water pressure to a sample to simulate the real working state of a related contact surface.
Disclosure of Invention
The invention aims to provide a stacked ring type shear apparatus with seepage pressure control, which solves the problem that the stacked ring type shear apparatus in the prior art cannot stably apply seepage water pressure to a sample.
It is another object of the present invention to provide a method of using a stacked ring shear apparatus with seepage pressure control.
The invention adopts a technology that a laminated ring type shearing instrument with seepage pressure control comprises a shearing module, wherein the shearing module is respectively connected with a seepage control module and a measuring module.
The present invention is also characterized in that,
the shearing module includes the base, set up frame construction on the base, set up the lower shear box in the frame construction, set up the roller bearing row between lower shear box and the base, the shear box is the cuboid structure, set up the rectangle recess on the lower shear box, set up pressure sensor in the rectangle recess, the upper surface that the lower shear box encircles the rectangle recess sets up a plurality of spherical grooves, set up the steel sheet and fold the ring in the spherical groove, lay the needle bar on the steel sheet folds the ring, a plurality of layers of needle bar and steel sheet fold the crisscross setting of ring around the rectangle recess, the superiors steel sheet folds the ring top and sets up the shear box, through a plurality of layers of needle bar and steel sheet fold the ring on the rectangle recess, go up the shear box and form the pressure chamber, lay the emulsion membrane in the pressure chamber.
The seepage control module comprises a closed water tank, a water inlet pipe is arranged at the bottom of the closed water tank, the bottom of a shearing box is connected with the water inlet pipe through a latex film to enter a pressure chamber, the closed water tank is connected with a high-pressure gas cylinder through a gas pipe, a first valve is arranged on the gas pipe, the closed water tank is connected with a water source through a water pipe, a water outlet of the water pipe is provided with a second valve, a pressure gauge is arranged on the high-pressure gas cylinder, and a flow velocity meter is arranged on the closed water tank.
The measuring module comprises a water container, a water outlet pipe is arranged at the top of the water container, the water outlet pipe is connected with the top of the upper shearing box and enters the pressure chamber through the latex film, a third valve is arranged on the water outlet pipe, an electronic scale is arranged at the bottom of the water container, a flow velocity sensor is arranged on the inner side of the top of the upper shearing box, and a pore water pressure gauge is arranged on the inner side of the bottom of the lower shearing box.
The top of the frame structure is provided with an axial oil pressure system, the axial oil pressure system comprises an axial hydraulic oil cylinder, a piston rod of the axial hydraulic oil cylinder is connected with a pressing block, the top of the upper shearing box is provided with a groove, a rubber ring is arranged in the groove, and the pressing block and the groove are clamped, extruded and sealed; one side of the bottom of the frame structure is provided with a horizontal oil pressure system, the horizontal oil pressure system comprises a horizontal hydraulic oil cylinder, and a piston rod of the horizontal hydraulic oil cylinder is connected with the side wall of the lower shearing box.
The pressure sensor, the flow velocity sensor, the pore water pressure gauge, the axial oil pressure system, the horizontal oil pressure system, the pressure gauge and the flow velocity gauge are all electrically connected with the microcomputer acquisition system.
And sealing rubber pads are arranged at the opposite positions of the pressure chamber, the lower shearing box and the upper shearing box.
The invention adopts another technology that the use method of the overlapped ring type shearing apparatus with seepage pressure control is implemented according to the following steps:
step 3, placing the test block into a lower shearing box, pouring prepared soil and stone materials into a pressure chamber until the height meets the filling requirement of the transition materials, stopping, vibrating and compacting until the test block is compact, placing a sealing rubber pad at the top of the pressure chamber, and then arranging an upper shearing box;
step 4, checking the air tightness in the pressure chamber;
And 6, after the normal pressure is stable, applying seepage water pressure to the sample, keeping the sample at a fixed normal pressure and seepage water pressure, gradually increasing horizontal pressure to the sample, performing a single shear test, and measuring the stress-strain relation of the sample.
The present invention is also characterized in that,
the specific operation of checking the airtightness of the pressure chamber is as follows: the high-pressure gas cylinder acts on the closed water tank to fill water into the pressure chamber, so that the pressure chamber is filled with water, the rupture condition of the latex film and the sealing condition of the rubber ring are checked, and the broken latex film is adhered and repaired.
The specific process of step 6 is as follows: the method comprises the steps of filling water into a closed water tank, adjusting a first valve and a second valve to enable water in the closed water tank to flow upwards from the bottom of a sample under the action of gas pressure, overflowing from the top of a pressure chamber, reversely adjusting air pressure and water pressure through a control valve by observing the conditions of a flow rate meter in the closed water tank and pore water pressure of a sample water inlet obtained by a pore water pressure meter, measuring the flow rate of water flowing out at the moment by using a microcomputer acquisition system, adjusting a plurality of valves to enable the water level in the closed water tank to be stable, stabilizing the water amount flowing out of a drain pipe on the upper portion of the sample, establishing a correlation relationship between air pressure-pore water pressure-flow rate, and jointly adjusting air pressure parameters of a seepage regulation system to enable the interior of the sample to form stable seepage water pressure from bottom to top.
The beneficial effects of the invention are: the invention applies seepage water pressure as an external force to an indoor shear test, the bottom and the top of a pressure chamber are respectively connected with a water pipe, a bottom water inlet pipe is connected with a seepage control module, a top water outlet pipe is connected with a measurement module, seepage water pressure is added through shearing, normal pressure and other pressures, the air pressure in a high-pressure air bottle is converted into water pressure by utilizing a water tank and is applied to a sample, and the relation between stress-strain and strength under different stress states of shearing, normal pressure, seepage water pressure and the like is measured by the test.
Drawings
FIG. 1 is a schematic diagram of a stacked ring shear apparatus with seepage pressure control according to the present invention;
FIG. 2 is a line graph of the process of the pore water pressure of the water inlet in the embodiment of the invention;
FIG. 3 is a graphical representation of a flow rate process within an enclosed water tank in an embodiment of the present invention;
FIG. 4 is a water outlet flow process line graph in an embodiment of the present invention;
FIG. 5 is a graph of shear test normal displacement versus shear displacement for an embodiment of the present invention;
in the figure, 1, a base, 2, a lower shearing box, 3, a pressure sensor, 4, a needle rolling row, 5, a steel plate stack ring, 6, an upper shearing box, 7, a pressing block, 8, an axial oil pressure system, 9, a horizontal oil pressure system, 10, a microcomputer acquisition system, 11, a water outlet pipe, 12, a pressure gauge, 13, a water container, 14, an electronic scale, 15, a flow meter, 16, a closed water tank, 17, a first valve, 18, a third valve, 19, a second valve, 20, a water source, 21, a water inlet pipe and 22, a high-pressure gas cylinder are arranged.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
The invention relates to a structure of a stacked ring type shearing instrument with seepage pressure control, which comprises a shearing module, wherein the shearing module is respectively connected with a seepage control module and a measuring module.
As shown in figure 1, the shearing module comprises a base 1, a frame structure is arranged on the base 1, a lower shearing box 2 is arranged in the frame structure, a roller row is arranged between the lower shearing box 2 and the base 1, the shearing box 2 is of a cuboid structure, a rectangular groove is formed in the lower shearing box 2, a pressure sensor 3 is arranged in the rectangular groove, a plurality of spherical grooves are formed in the upper surface of the lower shearing box 2 surrounding the rectangular groove, a roller row 4 is laid on a steel plate stack ring 5 in each spherical groove, a plurality of roller rows 4 and steel plate stack rings 5 are arranged around the rectangular groove in a staggered manner, an upper shearing box 6 is arranged at the top of the uppermost steel plate stack ring 5, a pressure chamber is formed on each rectangular groove by the plurality of roller rows 4, the steel plate stack ring 5 and the upper shearing box 6, a latex film is laid in the pressure chamber, and the lower shearing box 2, the sealing rubber pad is arranged at the opposite position of the upper shearing box 6, so that the airtightness of the pressure chamber is ensured.
Frame construction top sets up axial oil pressure system 8, and axial oil pressure system 8 includes axial hydraulic cylinder, and axial hydraulic cylinder piston rod connects briquetting 7, and 6 tops of upper shear box set up the recess, set up the rubber circle in the recess, and briquetting 7 and recess looks joint extrusion are sealed, and axial oil pressure system 8 provides vertical pressure through briquetting 7 to upper shear box 6. Frame construction bottom one side sets up horizontal oil pressure system 9, and horizontal oil pressure system 9 includes horizontal hydraulic cylinder, and 2 lateral walls of lower shear box are connected to horizontal hydraulic cylinder piston rod. The horizontal oil hydraulic system 9 provides horizontal shear force for the shear test.
The seepage flow control module is including sealing water tank 16, and 16 bottoms of sealing water tank set up inlet tube 21, and inlet tube 21 connects 2 bottoms of lower shearing box and passes through emulsion membrane entering pressure chamber, and sealing water tank 16 passes through trachea connection high-pressure gas cylinder 22, sets up first valve 17 on the trachea, and sealing water tank 16 leads to pipe connection water source 20, and the delivery port of water pipe sets up second valve 19, sets up manometer 12 on the high-pressure gas cylinder 22, sets up velocity of flow table 15 on the sealing water tank 16. The water source 20 can stably provide a water source, so as to ensure stable water flow in the closed water tank 16, the flow rate of the water entering the closed water tank 16 is adjusted through the second valve 19, and the flow rate of the water source in the closed water tank 16 tends to be stable through observation and recording of the flow rate of the water by the flow rate meter 15.
The measuring module comprises a water container 13, a water outlet pipe 11 is arranged at the top of the water container 13, the water outlet pipe 11 is connected with the top of the upper shearing box 6 and enters the pressure chamber through the latex film, a third valve 18 is arranged on the water outlet pipe 11, and an electronic scale 14 is arranged at the bottom of the water container 13. The inner side of the top of the upper shearing box 6 is provided with a flow velocity sensor, the inner side of the bottom of the lower shearing box 2 is provided with a pore water pressure gauge, and the seepage pressure of the water inlet pipe 21 when water enters the bottom of the lower shearing box 2 is accurately recorded;
the pressure sensor 3, the flow velocity sensor, the pore water pressure gauge, the axial oil pressure system 8, the horizontal oil pressure system 9, the pressure gauge 12 and the flow velocity gauge 15 are all electrically connected with the microcomputer acquisition system 10, and the microcomputer acquisition system 10 exports test data to external computer software in real time.
The invention relates to a using method of a stacked ring type shearing apparatus with seepage pressure control, which is implemented according to the following steps:
step 3, placing the test block into the lower shearing box 2, pouring the prepared soil and stone materials into the pressure chamber until the height meets the filling requirement of the transition materials, stopping, vibrating and compacting until the soil and stone materials are compact, placing a sealing rubber pad at the top of the pressure chamber, and then arranging an upper shearing box 6;
step 4, checking the air tightness in the pressure chamber;
the specific operations for checking the airtightness of the pressure chamber are as follows: the high-pressure gas cylinder 22 acts on the closed water tank 16 to fill water into the pressure chamber, so that the pressure chamber is filled with water, the rupture condition of the latex film and the sealing condition of the rubber ring are checked, and the ruptured latex film is adhered and repaired.
And 5, starting the axial oil pressure system 9, the horizontal oil pressure system 8 and the seepage control module, and applying the required normal pressure to the sample in the lower shear box 2 through the axial oil pressure system.
And 6, after the normal pressure is stable, applying seepage water pressure to the sample, keeping the sample at a fixed normal pressure and seepage water pressure, gradually increasing horizontal pressure to the sample, performing a single shear test, and measuring the stress-strain relation of the sample.
The specific process of step 6 is as follows: the closed water tank 16 is filled with water, the first valve 17 and the second valve 19 are adjusted to enable the air to press the water in the closed water tank 16 to flow upwards from the bottom of the sample and overflow from the top of the pressure chamber, the air pressure and the water pressure are reversely adjusted by controlling the valves through observing the condition of the pore water pressure of a sample water inlet obtained by the flow meter 15 and the pore water pressure gauge in the closed water tank 16, the flow rate of the water flowing out at the moment is measured by the microcomputer acquisition system 10, the water level in the closed water tank is kept stable by adjusting the valves, the water flowing out of the drain pipe 11 at the upper part of the sample is stable, the correlation between the air pressure and the pore water pressure-flow is established, and the air pressure parameter of the seepage adjusting system is adjusted in a combined mode, so that stable seepage water pressure from bottom to top is formed in the sample.
Examples
In this embodiment, taking a single shear test of asphalt concrete as an example, the experimental process of the stacked ring type shear apparatus with seepage pressure control of the present invention is performed, and the specific steps are as follows:
And 2, circularly and alternately placing the height of a pressure chamber formed by the needle row 4 and the steel plate stack ring 5 at the top of the lower shearing box 2, and stopping when the height reaches 42 cm.
Step 3, fixedly arranging a latex film in the pressure chamber, and fully spreading the latex film upwards along the inner wall of the pressure chamber to ensure that the latex film is directly attached to the inner wall of the pressure chamber;
step 4, placing the prepared asphalt concrete test blocks into the lower shearing box 2, pouring a group of prepared soil stones into the shearing box 2 until the height meets the filling requirement of each layer of transition materials, stopping vibrating and compacting until the materials are compacted to be compact, and covering the upper shearing box 6 after compacting;
step 6, the sealing condition is intact, the axial oil pressure system, the horizontal oil pressure system and the seepage control module are started, and the axial oil pressure system applies the required normal pressure to the sample in the lower shear box 2;
step 7, after the normal pressure is stable, applying seepage water pressure to the sample, filling water into the closed water tank, adjusting the first valve and the second valve to make the gas press the water in the closed water tank to flow upwards from the bottom of the sample and overflow from the top, reversely adjusting the air pressure and the water pressure by the flow rate in the closed water tank and the pore water pressure at the water inlet of the sample, simultaneously measuring the flow rate of the water flowing out by a microcomputer acquisition system, adjusting a plurality of valves to keep the water level in the closed water tank stable, stabilizing the water quantity flowing out from the water outlet pipe at the upper part of the sample, establishing a correlation relationship of the air pressure-the pore water pressure-the flow rate, jointly adjusting the air pressure parameters of the seepage adjustment system to form stable seepage water pressure from bottom to top in the sample, and actually measuring the pore water pressure process diagram at the water inlet, as shown in figure 2, because the water pressure does not reach balance, the curve is unstable, and stable pore water pressure is obtained after a period of adjustment, which shows that the stacked ring type shearing apparatus with seepage pressure control provides stable water pressure; the flow rate process line graph in the water tank is shown in figure 3, the flow rate process line of the water outlet is shown in figure 4, figures 3 and 4 show turbulent water flow at the beginning and are influenced by the reason that the water source is unstable, and stable water flow is shown after the water source is stably supplied, which indicates that the device can provide the stable water flow requirement for the device.
For the single shear test, the sample is kept at a fixed normal pressure and a constant seepage pressure, a horizontal pressure is gradually added to the sample, and the stress-strain relation of the sample is measured, as shown in fig. 5, the stress-strain curve conforms to a hyperbolic rule, which shows that experimental data conforming to the rule are measured under the seepage pressure condition of the device.
The invention relates to a laminated ring type shearing instrument with seepage pressure control, wherein the bottom and the top of a pressure chamber are respectively connected with a water pipe, a bottom water inlet pipe is connected with a seepage adjusting system, a top water outlet pipe is connected with a measuring device, so that seepage water pressure can be added while the pressure such as shearing pressure, normal pressure and the like is considered, and the air pressure in a high-pressure air bottle is converted into the water pressure by a water tank and is applied to a sample. The device directly applies seepage water pressure on the sample, measures the relation between stress-strain and strength of the sample under different stress states such as shearing force, normal pressure, seepage water pressure and the like, and has the advantages of simplicity and practicality.
Claims (10)
1. The stacked ring type shearing instrument with seepage pressure control is characterized by comprising a shearing module, wherein the shearing module is respectively connected with a seepage control module and a measuring module.
2. The overlapped ring type shearing instrument with seepage pressure control as claimed in claim 1, wherein the shearing module comprises a base (1), a frame structure is arranged on the base (1), a lower shearing box (2) is arranged in the frame structure, a roller row is arranged between the lower shearing box (2) and the base (1), the shearing box (2) is of a cuboid structure, a rectangular groove is formed in the lower shearing box (2), a pressure sensor (3) is arranged in the rectangular groove, a plurality of spherical grooves are formed in the upper surface, surrounding the rectangular groove, of the lower shearing box (2), a steel plate overlapped ring (5) is arranged in the spherical grooves, a roller row (4) is laid on the steel plate overlapped ring (5), a plurality of roller rows (4) and steel plate overlapped rings (5) are arranged in a staggered mode around the rectangular groove, an upper shearing box (6) is arranged at the top of the steel plate overlapped ring (5) on the uppermost layer, and the steel plate overlapped ring (5) are arranged on the rectangular groove through the plurality of roller rows (4), The upper shearing box (6) forms a pressure chamber, and the latex film is paved in the pressure chamber.
3. The overlapped ring type shear apparatus with seepage pressure control according to claim 2, wherein the seepage control module comprises a closed water tank (16), a water inlet pipe (21) is arranged at the bottom of the closed water tank (16), the water inlet pipe (21) is connected with the bottom of the lower shear box (2) and enters the pressure chamber through a latex film, the closed water tank (16) is connected with a high-pressure gas cylinder (22) through a gas pipe, a first valve (17) is arranged on the gas pipe, the closed water tank (16) is connected with a water source (20) through a water pipe, a water outlet of the water pipe is provided with a second valve (19), a pressure gauge (12) is arranged on the high-pressure gas cylinder (22), and a flow rate meter (15) is arranged on the closed water tank (16).
4. The stacked ring type shear apparatus with seepage pressure control as claimed in claim 3, wherein the measuring module comprises a water container (13), a water outlet pipe (11) is arranged at the top of the water container (13), the water outlet pipe (11) is connected with the top of the upper shear box (6) and enters the pressure chamber through a latex film, a third valve (18) is arranged on the water outlet pipe (11), an electronic scale (14) is arranged at the bottom of the water container (13), a flow rate sensor is arranged on the inner side of the top of the upper shear box (6), and a pore water pressure gauge is arranged on the inner side of the bottom of the lower shear box (2).
5. The overlapped ring type shearing instrument with seepage pressure control as claimed in claim 4, wherein an axial oil pressure system (8) is arranged at the top of the frame structure, the axial oil pressure system (8) comprises an axial hydraulic oil cylinder, a piston rod of the axial hydraulic oil cylinder is connected with a pressing block (7), a groove is arranged at the top of the upper shearing box (6), a rubber ring is arranged in the groove, and the pressing block (7) is clamped with the groove for extrusion sealing; one side of the bottom of the frame structure is provided with a horizontal oil pressure system (9), the horizontal oil pressure system (9) comprises a horizontal hydraulic oil cylinder, and a piston rod of the horizontal hydraulic oil cylinder is connected with the side wall of the lower shearing box (2).
6. The shear ring stack type shear apparatus with seepage pressure control as claimed in claim 5, wherein the pressure sensor (3), the flow rate sensor, the pore water pressure gauge, the axial oil pressure system (8), the horizontal oil pressure system (9), the pressure gauge (12) and the flow rate gauge (15) are all electrically connected with the microcomputer acquisition system (10).
7. The shear ring stack with seepage pressure control as claimed in claim 2, wherein the pressure chamber is provided with sealing rubber gaskets opposite to the lower shear box (2) and the upper shear box (6).
8. The use method of the stacked ring type shear apparatus with seepage pressure control, which uses the stacked ring type shear apparatus with seepage pressure control according to claim 6, is characterized by being implemented according to the following steps:
step 1, according to the shearing experiment raw materials, a pressure chamber height formed by a required needle row (4) and a steel plate stack ring (5) is alternately paved on a lower shearing box (2);
step 2, fully spreading and fixing the latex film upwards along the inner wall of the pressure chamber to ensure that the latex film is directly attached to the inner wall of the pressure chamber;
step 3, placing the test block into a lower shearing box (2), pouring prepared soil and stone materials into a pressure chamber until the height meets the filling requirement of the transition materials, stopping, vibrating and compacting until the test block is compact, placing a sealing rubber pad at the top of the pressure chamber, and then arranging an upper shearing box (6);
Step 4, checking the air tightness in the pressure chamber;
step 5, starting the axial oil pressure system (9), the horizontal oil pressure system (8) and the seepage control module, and applying required normal pressure to the sample in the lower shear box (2) through the axial oil pressure system;
and 6, after the normal pressure is stable, applying seepage water pressure to the sample, keeping the sample at a fixed normal pressure and seepage water pressure, gradually increasing horizontal pressure to the sample, performing a single shear test, and measuring the stress-strain relation of the sample.
9. The method for using a stacked ring shear apparatus with seepage pressure control as claimed in claim 8, wherein the specific operation of checking the airtightness in the pressure chamber is as follows: the high-pressure gas cylinder (22) acts on the closed water tank (16) to fill water into the pressure chamber, so that the pressure chamber is filled with water, the rupture condition of the latex film and the sealing condition of the rubber ring are checked, and the ruptured latex film is adhered and repaired.
10. The use method of the stacked ring type shear apparatus with seepage pressure control as claimed in claim 8, wherein the specific process of step 6 is as follows: the method comprises the steps of filling water into a closed water tank (16), adjusting a first valve (17) and a second valve (19) to enable water in the closed water tank (16) to flow upwards from the bottom of a sample under the action of gas pressure, overflowing from the top of a pressure chamber, reversely adjusting air pressure and water pressure through controlling the valves by observing the condition of pore water pressure of a sample water inlet obtained by a flow rate meter (15) and a pore water pressure gauge in the closed water tank (16), measuring the flow rate of the water flowing out at the moment by using a microcomputer acquisition system (10), adjusting a plurality of valves to enable the water level in the closed water tank to be stable, enabling the water amount flowing out of a drain pipe (11) at the upper part of the sample to be stable, establishing a correlation between air pressure and pore water pressure-flow, and jointly adjusting air pressure parameters of a seepage adjusting system to enable the interior of the sample to form stable seepage water pressure from bottom to top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210465854.1A CN114755095A (en) | 2022-04-29 | 2022-04-29 | Stacked ring type shearing instrument with seepage pressure control function and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210465854.1A CN114755095A (en) | 2022-04-29 | 2022-04-29 | Stacked ring type shearing instrument with seepage pressure control function and using method thereof |
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| CN114755095A true CN114755095A (en) | 2022-07-15 |
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| CN202210465854.1A Pending CN114755095A (en) | 2022-04-29 | 2022-04-29 | Stacked ring type shearing instrument with seepage pressure control function and using method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117686355A (en) * | 2023-12-27 | 2024-03-12 | 中国石油大学(华东) | System and method for testing interfacial shear strength in suction foundation penetration-extraction process |
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2022
- 2022-04-29 CN CN202210465854.1A patent/CN114755095A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117686355A (en) * | 2023-12-27 | 2024-03-12 | 中国石油大学(华东) | System and method for testing interfacial shear strength in suction foundation penetration-extraction process |
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