CN217156237U - Multifunctional test inclined plate instrument for interface friction characteristics of geotextile - Google Patents
Multifunctional test inclined plate instrument for interface friction characteristics of geotextile Download PDFInfo
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- CN217156237U CN217156237U CN202220414553.1U CN202220414553U CN217156237U CN 217156237 U CN217156237 U CN 217156237U CN 202220414553 U CN202220414553 U CN 202220414553U CN 217156237 U CN217156237 U CN 217156237U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/40—Protecting water resources
- Y02A20/402—River restoration
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Abstract
The invention discloses a multifunctional test sloping plate instrument for geotechnical fabric interface friction characteristics, which comprises a shearing device, a test table board and a variable angle driving device, wherein the shearing device is arranged on the test table board; the shearing device is positioned on the test table board, the variable angle driving device is rotatably connected to one end of the bottom of the shearing device, and the shearing device is driven to move linearly along the test table board in a variable angle mode. The invention can be used for carrying out different geotextile interface friction characteristic tests, expanding the application range of the sloping plate instrument, carrying out multi-angle direct shear test, reducing the actual stress condition of the geotechnical material and reducing the test error, and can also be used for the shear test of other rock and soil materials and improving the utilization efficiency of the test instrument.
Description
Technical Field
The invention belongs to the field of soil mechanics test equipment, and particularly relates to a multifunctional test inclined plate instrument for interface friction characteristics of a geotextile.
Background
Geotextiles such as geotextiles, ecological bags and other artificial materials are widely applied to the construction of river dikes, bay breakwaters and river bank slope engineering. The interface friction characteristic test of the geotextile aims at measuring the friction characteristic of the geotextile and the bank slope rock-soil body direct shear, knowing the relation between the deformation of the material and time and pressure in the actual application scene, and calculating the strength characteristic and the reasonable arrangement mode of the material by combining other physical and mechanical indexes. The friction test result of the geotextile interface is used as the foundation of engineering design and construction, and directly determines the rationality of the engineering design and the economic benefit of a project, so that reasonable parameter acquisition is particularly important.
The traditional geotextile interface friction characteristic test is mainly obtained through a direct shear test and is one of basic methods for material mechanical property tests. However, the shear plane of the direct shear test is parallel to the horizontal plane, and the actual situation of the application of the geotextile cannot be effectively restored. Meanwhile, the direct shear test can be performed only on a material of a partial particle size due to size limitation, and when a large-particle-size pellet is involved, it is necessary to scale down the natural gradation of the material. Both factors will have a certain influence on the accuracy of the test result. Therefore, in order to solve the problems, the invention provides the inclined plate instrument for testing the interface friction characteristics of the geotextile, which can reduce the use conditions of materials and further reduce the influence of size effect.
Disclosure of Invention
The invention aims to provide a multifunctional test sloping plate instrument for interface friction characteristics of geotextiles, and solves the problems that the actual situation cannot be effectively reduced and the limitation of the particle size of materials affects the accuracy of test results when a direct shear test is applied to the geotextiles.
The technical scheme adopted by the invention is a multifunctional test sloping plate instrument for geotechnical fabric interface friction characteristics, which comprises a shearing device, a test table board and a variable angle driving device; the shearing device is positioned on the test table board, the variable angle driving device is rotatably connected to one end of the bottom of the shearing device, and the shearing device is driven to move linearly along the test table board in a variable angle mode.
Preferably, the shearing device comprises a shearing device frame, a fixed upper shearing box and a lower shearing box, wherein the fixed upper shearing box and the lower shearing box are arranged in the shearing device frame and can move in parallel relative to the shearing device frame.
Preferably, a normal loading device fixed on the shearing device frame is arranged right above the upper shearing box, and a shearing driving device for driving the lower shearing box to move in parallel is arranged on one side of the shearing device frame.
Preferably, a normal displacement sensor and a normal stress sensor are arranged on the normal loading device.
Preferably, the lower shear box is movably secured within a side runner of the shear frame by a connector, the connector and the side runner allowing the lower shear box to move only in the direction of the runner.
Preferably, sensors are further arranged on the side wall of the shearing device frame, and the sensors comprise a horizontal displacement sensor and a horizontal stress sensor.
Preferably, the variable angle driving device comprises a rotary connecting piece and a hydraulic jack; the rotary connecting piece is used for connecting the hydraulic jack and the shearing device; the hydraulic jack is arranged at a small hole of the test table board, and the shearing device is in a horizontal state on the test table board when the hydraulic jack is not extended out.
Preferably, the bottom of one end of the shearing device, which is far away from the variable angle driving device, is provided with a rolling device, and a sliding rail is arranged on the test table board at a position corresponding to the rolling device.
Preferably, the rolling device is a gear, and a rack is arranged in the sliding rail.
The invention has the beneficial effects that:
1. the invention can carry out different geotextile interface friction characteristic tests, enlarges the application range of the sloping plate instrument, and simultaneously can carry out multi-angle direct shear test;
2. the hydraulic jack with the adjustable angle can restore the actual stress condition of the geotechnical material and reduce the error of the test;
3. the invention can simultaneously carry out the shear test of other rock and soil materials and can improve the utilization efficiency of the test instrument.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Wherein: 1. the device comprises a test table board, 2, a variable angle driving device, 3, a rotating connecting piece, 4, a sliding rail, 5, a shearing device frame, 6, a side sliding groove, 7, a horizontal displacement sensor, a horizontal stress sensor, 8, a normal displacement sensor, 9, a normal stress sensor, 10, a normal loading device, 11, a shearing driving device, 12, a lower shearing box, 13, an upper shearing box, 14 and a loading plate.
Detailed Description
The present invention will now be described in detail by way of preferred embodiments with reference to the accompanying drawings. Referring to fig. 1, wherein:
first, in the embodiment of the present invention, the large-scale compression testing equipment may be manufactured into different sizes according to the size of the material particle diameter to be detected, so as to meet the requirements of the indoor simulation test of the deformation characteristics of the large-particle-diameter and coarse-particle materials.
The test table board 1 is of a support structure, the angle-variable driving device 2 is placed on one side of the bottom of the support structure, and the shearing device is placed on the upper portion of the support structure. One end of the bottom of the shearing device is rotatably connected with the variable angle driving device 2, the other end of the bottom of the shearing device is provided with a rolling device, a sliding rail 4 is arranged on the test table board 1 corresponding to the rolling device, and the rolling device and the sliding rail 4 can reduce the friction force between the shearing device and the test table board 1. The invention selects the gear as the rolling device, and the rack is arranged in the slide rail, so as to further improve the transmission efficiency, but not only the gear, but also other rolling devices with similar functions.
The variable angle driving device 2 comprises a rotating connecting piece 3 and a hydraulic jack, the rotating connecting piece 3 is located between the hydraulic jack and the shearing device, the hydraulic jack is arranged at a small hole of the test table board, and when the hydraulic jack does not extend out, the shearing device is in a horizontal state on the test table board. The top of the variable angle driving device 2 is rotatably connected with one end of the bottom of the shearing device, the variable angle driving device 2 is connected with the shearing device through the rotating connecting piece 3, the hydraulic jack can lift one end of the shearing device or make the end fall, so that the angle between the shearing device and the test table board 1 is changed, and under the condition that the hydraulic jack is contracted, the shearing device is in a horizontal state and is flush with the test table board 1. The hydraulic jack used in the invention can be replaced by other devices with the functions of jacking and falling back.
The shearing device comprises a shearing device frame 5, a fixed upper shearing box 13 and a lower shearing box 12, wherein the fixed upper shearing box 13 and the lower shearing box 12 are arranged in the shearing device frame 5 and can move in parallel relative to the shearing device frame 5. The upper shearing box 13 is connected with the shearing device frame 5 through bolts, a movable loading plate 14 is arranged on the upper shearing box 13, the loading plate 14 covers the soil sample so as to be uniformly stressed when the soil sample is loaded, a normal loading device 10 fixed on the shearing device frame 5 is arranged right above the upper shearing box 13, the normal loading device 10 is used for applying pressure to the loading plate 14, and therefore the loading plate 14 moves downwards and extrudes the soil sample, and a normal displacement sensor 8 and a normal stress sensor 9 are further arranged on the normal loading device 10. The lower shear box 12 is movably secured within the side runners 6 of the shear frame 5 by a connecting member, the connecting member and the side runners 6 limiting the movement of the lower shear box 12 to only one direction along the side runners 6. A shearing driving device 11 for driving the lower shearing box 12 to move along the side sliding groove 6 is arranged on one side in the shearing device frame 5, and the shearing driving device 11 is connected with the lower shearing box 12 through a driving shaft.
The shearing device frame 5 is a hollow box body structure, the box body is made of high-strength steel structure materials, and the thickness of the box body is not lower than 2 cm. The upper shearing box 13 and the lower shearing box 12 are made of high-strength steel, and the thickness of the steel is not less than 5cm, so that the strength of the equipment in the test process is ensured.
And a sensor is also arranged in the shearing device, the sensor comprises a horizontal displacement sensor and a horizontal stress sensor 7, and the horizontal displacement sensor and the horizontal stress sensor 7 are arranged on the side wall of the shearing device frame. The horizontal displacement sensor and the horizontal stress sensor 7 are used for monitoring the tensile force and the displacement change condition borne by the upper shearing box, so that displacement data are directly transmitted into a computer, the direct relation between shearing displacement and shearing stress is monitored in real time, the test process is judged, after displacement distance and pressure data are measured for many times, a relation curve between displacement and stress can be established, the friction performance of a test material is explained, and the friction characteristic of the material is quantitatively evaluated.
The working mode of the invention is as follows:
firstly, preparing materials used for a test, including coarse-grained soil loose particles and geotextile, filling the lower shearing box 12 with the coarse-grained soil loose particles layer by layer and compacting under the condition that a hydraulic jack does not extend out of the test table board 1, then laying the geotextile on the upper part of the shearing box, installing the upper shearing box 13, continuously refilling the coarse-grained soil loose particles and compacting, finally placing a loading plate 14, loading the loading device 10 according to the predicted normal stress by a microcomputer control method, and monitoring the stress and the numerical value of a displacement sensor by software. The software is the existing 'pressure tester software', the software is installed on computers when ordinary pressure test machines are purchased, such as YES-2000 pressure tester software of the Jinan tester factory, EHC-1300 microcomputer control full-automatic pressure tester software of the environmental building instrument and equipment factories of Hebei donation county, and the software can be directly adopted in the device.
And then the hydraulic jack is controlled by a microcomputer to jack the shearing device to a preset angle, a strain control method is adopted for shearing, the shearing driving device 11 drives the lower shearing box 12 to generate certain displacement, and meanwhile, the normal loading device 10 loads the upper shearing box 13. The test was stopped until the shear displacement reached the specified value.
After the test is finished, the microcomputer controls the hydraulic jack to contract, so that the shearing device frame 5 is restored to the horizontal state, and the normal loading device 10 is controlled to unload. The pressure and displacement conditions at which the pressurizing device operates during the process are recorded. And after the test is finished, disassembling the equipment.
The invention can be used for carrying out different geotextile interface friction characteristic tests, expanding the application range of the sloping plate instrument, carrying out multi-angle direct shear test, reducing the actual stress condition of the geotechnical material and reducing the test error, and can also be used for the shear test of other rock and soil materials and improving the utilization efficiency of the test instrument.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.
Claims (9)
1. A multifunctional test sloping plate instrument for geotechnical fabric interface friction characteristics is characterized by comprising a shearing device, a test table board and a variable angle driving device; the shearing device is positioned on the test table board, the variable angle driving device is rotatably connected to one end of the bottom of the shearing device, and the shearing device is driven to move linearly along the test table board in a variable angle mode.
2. The multi-functional test swash plate apparatus for geotextile interface friction characteristics of claim 1, wherein the shear device comprises a shear device frame and a fixed upper shear box and a lower shear box arranged in the shear device frame and movable in parallel with respect to the shear device frame.
3. The multifunctional bevel tester for testing the friction characteristics of the geotextile interface of claim 2, wherein a normal loading device fixed on the shearing device frame is arranged right above the upper shearing box, and a shearing driving device for driving the lower shearing box to move in parallel is arranged on one side of the shearing device frame.
4. The multifunctional test sloping plate instrument for the friction characteristics of the geotextile interface of claim 3, wherein a normal displacement sensor and a normal stress sensor are arranged on the normal loading device.
5. The multi-functional test tilt plate apparatus for geotextile interface friction characteristics of claim 2, wherein the lower shear box is movably fixed in the side sliding groove of the shear device frame by a connecting member, and the connecting member and the side sliding groove enable the lower shear box to move only in the direction of the sliding groove.
6. The multifunctional test sloping plate instrument for the friction characteristics of the geotextile interface of claim 2, wherein a sensor is further arranged on the side wall of the shearing device frame, and the sensor comprises a horizontal displacement sensor and a horizontal stress sensor.
7. The multifunctional test swash plate apparatus for interface friction characteristics of geotextiles of claim 1, wherein the variable angle drive comprises a rotary connector and a hydraulic jack; the rotary connecting piece is used for connecting the hydraulic jack and the shearing device; the hydraulic jack is arranged at a small hole of the test table board, and the shearing device is in a horizontal state on the test table board when the hydraulic jack is not extended out.
8. The multifunctional test sloping plate instrument for the friction characteristics of the geotextile interface of claim 1, wherein a rolling device is arranged at the bottom of one end of the shearing device, which is far away from the variable angle driving device, and a sliding rail is arranged on the test table top corresponding to the rolling device.
9. The multifunctional test sloping plate instrument for friction characteristics of geotextile interfaces of claim 8, wherein the rolling device is a gear, and a rack is arranged in the slide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220414553.1U CN217156237U (en) | 2022-02-28 | 2022-02-28 | Multifunctional test inclined plate instrument for interface friction characteristics of geotextile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220414553.1U CN217156237U (en) | 2022-02-28 | 2022-02-28 | Multifunctional test inclined plate instrument for interface friction characteristics of geotextile |
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| Publication Number | Publication Date |
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| CN217156237U true CN217156237U (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220414553.1U Active CN217156237U (en) | 2022-02-28 | 2022-02-28 | Multifunctional test inclined plate instrument for interface friction characteristics of geotextile |
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| CN (1) | CN217156237U (en) |
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2022
- 2022-02-28 CN CN202220414553.1U patent/CN217156237U/en active Active
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