CN113447344B - Test equipment and method for simulating performance of rock-soil body under action of tension-compression dynamic wave - Google Patents
Test equipment and method for simulating performance of rock-soil body under action of tension-compression dynamic wave Download PDFInfo
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- CN113447344B CN113447344B CN202110798206.3A CN202110798206A CN113447344B CN 113447344 B CN113447344 B CN 113447344B CN 202110798206 A CN202110798206 A CN 202110798206A CN 113447344 B CN113447344 B CN 113447344B
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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
- G01N3/02—Details
- G01N3/04—Chucks
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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
- G01N3/02—Details
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
Abstract
The invention discloses a test device and a test method for simulating the performance of rock and soil body under the action of tension and compression dynamic waves, wherein the test device comprises the following steps: the testing machine comprises a testing machine body, a universal tension and compression clamp, a lower tension and compression clamp and a sample tool; the sample frock sets up and draws between pressing anchor clamps and the lower clamp that draws. An upper pulling and pressing shaft on the testing machine body is connected with a universal pulling and pressing clamp through threads, and a lower pulling and pressing shaft is connected with a lower pulling and pressing clamp through threads; adjusting the position of a cross beam of the testing machine body, placing pull rods in alignment grooves respectively formed in the centers of the bottom surface of the upper pull-press seat and the top surface of the connecting plate, applying a load of 200kN, locking an upper locking nut and a lower locking nut, and removing the pull rods after locking; connecting the prepared sample tool with a universal tension and compression clamp and a lower tension and compression clamp through screws; mounting a deformation sensor; preloading tension of 1kN, screwing up the spherical hinge locking screw, and eliminating gaps; tests were performed and data collected.
Description
Technical Field
The invention relates to the technical field of rock mechanics experiments, in particular to test equipment and a method for simulating rock and soil property performance under the action of tension and compression dynamic waves.
Background
Longitudinal waves and transverse waves are two common waveforms of dynamic loads such as seismic waves or blasting. The propagation direction of the transverse wave is perpendicular to the particle motion direction, and is represented as a shear load, while the propagation direction of the longitudinal wave is the same as the particle motion direction, and is represented as a tension load. Longitudinal wave propagation speed is faster in the medium, through drawing pressure circulation load make rock mass or structure in the initial damage of taking place earlier, and the rock mass in a lot of earthquakes is because the drawing pressure effect that receives the longitudinal wave takes place preliminary damage, and the shearing action that receives the transverse wave afterwards takes place the unstability and destroys, and consequently, the mechanical properties of simulation longitudinal wave draws pressure load effect down the ground body is very important.
In the rock mechanics, when the tensile and compressive loads of longitudinal waves are applied in the same test, the tensile stress and the compressive stress are difficult to be applied simultaneously, most of the tensile stress and the compressive stress can be only applied in a variable way, the waveform of the tensile stress part is eliminated, and some of the tensile stress can also be applied in a variable way. The key difficulty is that if the tension-compression load appears circularly in the test process, the concentricity of the upper and lower pressing blocks is difficult to ensure, so that the test fails.
Disclosure of Invention
The invention aims to provide test equipment and a test method for simulating the performance of rock and soil bodies under the action of tension and compression dynamic waves, so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a test device for simulating the performance of rock and soil body under the action of tension and compression dynamic waves, which comprises: the testing machine comprises a testing machine body, a universal tension and compression clamp, a lower tension and compression clamp and a sample tool;
an upper pulling and pressing shaft is arranged at the top of the testing machine body, and a lower pulling and pressing shaft is arranged at the bottom of the testing machine body;
the universal pulling and pressing clamp is connected with the upper pulling and pressing shaft, and the lower pulling and pressing clamp is connected with the lower pulling and pressing shaft; the sample tooling is arranged between the universal tension and compression clamp and the lower tension and compression clamp.
Preferably, the universal pulling and pressing clamp comprises an upper pulling and pressing head, an upper locking nut, a joint bearing, a pressing cover, a connecting shaft and an upper pulling and pressing seat;
the top of the upper pulling and pressing head is connected with the upper pulling and pressing shaft through threads, the upper locking nut is connected with the top of the upper pulling and pressing head through threads, and the connecting shaft penetrates through the upper pulling and pressing head and the upper pulling and pressing seat; the joint bearing is embedded at the bottom of the upper pulling and pressing head, the side face of the gland is connected with the side face of the bottom of the upper pulling and pressing head through a bolt, the joint bearing is arranged between the gland and the upper pulling and pressing head, the joint bearing is sleeved on the connecting shaft with the gland, and the top face of the sample tool is connected with the bottom face of the upper pulling and pressing seat through a bolt.
Preferably, the upper pulling pressure head comprises an upper threaded column, a first clamping plate, a bearing groove and a limiting groove;
the upper threaded column is in threaded connection with the upper pulling and pressing shaft, the upper locking nut is in threaded connection with the upper threaded column, and the first clamping and connecting plate is fixedly connected with the bottom surface of the upper threaded column; the bearing groove is formed in the side face of the first clamping plate, the joint bearing is arranged in the bearing groove, the limiting groove is formed in the position of the bearing groove, the pressing cover is arranged in the limiting groove, and the pressing cover is connected with the limiting groove through bolts.
Preferably, the upper pulling and pressing seat comprises a pressing plate and a second clamping and connecting plate;
the two second clamping plates are arranged on the top surface of the pressing plate in parallel, the bottom surface of the second clamping plate is fixedly connected with the top surface of the pressing plate, and two side surfaces of the first clamping plate are respectively abutted against the side surfaces of the two second clamping plates; the connecting shaft penetrates through the first clamping connection plate and the second clamping connection plate; and the top surface of the sample tool is fixedly connected with the bottom surface of the pressing plate.
Preferably, gaps are formed in the bottom surface of the first clamping connection plate and the top surface of the second clamping connection plate, the bottom of the first clamping connection plate and the top of the second clamping connection plate are divided into two parts by the gaps, and the bottom of the first clamping connection plate and the top of the second clamping connection plate are connected through a spherical hinge locking screw.
Preferably, the lower pulling and pressing clamp comprises a lower pulling and pressing head and a lower locking nut;
the bottom of the lower pull-down pressure head is connected with the lower pull-down pressure shaft through threads, and the bottom of the lower locking nut is connected with the bottom of the lower pull-down pressure head through threads.
Preferably, the pull-down pressure head comprises a lower threaded column and a connecting plate;
the bottom of the lower threaded column is in threaded connection with the lower pulling and pressing shaft, the bottom surface of the connecting plate is fixedly connected with the top surface of the lower threaded column, the bottom surface of the sample tool is connected with the top surface of the connecting plate through a bolt, and the lower locking nut is in threaded connection with the lower threaded column.
Preferably, the center of the bottom surface of the upper pulling and pressing seat and the center of the top surface of the connecting plate are respectively provided with an alignment groove.
Preferably, the sample tool comprises an upper pressure head, a lower pressure head, a sample body, a connecting ring, an extensometer ring and a connecting rod;
the upper pressure head and the lower pressure head are fixedly connected with the top surface and the bottom surface of the sample body respectively, the bottom surface of the lower pressure head is connected with the top surface of the connecting plate through a bolt, and the top surface of the upper pressure head is fixedly connected with the bottom surface of the pressure plate; the extensometer ring is provided with two, and the cover is established respectively go up the pressure head with on the outer wall of pressure head down, the go-between cover is established on the outer wall of pressure head down, be located the below the extensometer ring with the go-between passes through bolted connection, the connecting rod both ends are connected respectively go up the pressure head with pressure head down.
A test method for simulating the performance of rock and soil body under the action of tension and compression dynamic waves comprises the following steps:
connecting the upper pulling and pressing shaft on the testing machine body with the universal pulling and pressing clamp through threads, and connecting the lower pulling and pressing shaft with the lower pulling and pressing clamp through threads;
adjusting the position of a cross beam of the testing machine body, placing a pull rod in alignment grooves respectively formed in the centers of the bottom surface of the upper pulling and pressing seat and the top surface of the connecting plate, applying a load of 200kN, locking an upper locking nut and a lower locking nut, and removing the pull rod after locking;
connecting the prepared sample tool with a universal tension and compression clamp and a lower tension and compression clamp through screws;
mounting a deformation sensor;
preloading tension of 1kN, and screwing down the spherical hinge locking screw to eliminate a gap;
tests were performed and data collected.
The invention discloses the following technical effects: based on a testing machine body capable of applying dynamic load, the testing equipment disclosed by the invention can realize the concentricity of the universal tension-compression clamp and the downward tension-compression clamp, so that the upper pressing block and the lower pressing block are concentric under the condition that the tension-compression load appears circularly in the testing process, and the testing success rate is improved. The universal anchor clamps that press and the lower drop down of lower extreme of drawing of upper end press anchor clamps, and the laboratory is with the briquetting on the former instrument of anchor clamps replacement, through the adjustment operation, can realize that the universal anchor clamps that press that draw and the drop down press anchor clamps concentric, and the universal setting of drawing the press anchor clamps simultaneously can strengthen the flexibility when drawing the pressure test to the sample frock.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a transverse cross-sectional view of the present invention;
FIG. 3 is an enlarged view of a portion of the invention A1;
FIG. 4 is an enlarged view of a portion of A2 of the present invention;
FIG. 5 is a longitudinal cross-sectional view of the present invention;
FIG. 6 is an enlarged view of a portion of A3 of the present invention;
FIG. 7 is a schematic view of the pull-up ram of the present invention;
FIG. 8 is a schematic structural view of the pull-up press seat of the present invention;
FIG. 9 is a schematic view of the configuration of the drop head of the present invention;
FIG. 10 is a schematic structural diagram of an embodiment of the present invention;
wherein, 1, the testing machine body; 2. pulling up the pressing shaft; 3. pulling down the pressing shaft; 4. locking the nut; 5. a knuckle bearing; 6. a gland; 7. a connecting shaft; 8. screwing a threaded column; 9. a first clamping connection plate; 10. a bearing groove; 11. a limiting groove; 12. pressing a plate; 13. a second clamping plate; 14. a lower lock nut; 15. a lower threaded post; 16. a connecting plate; 17. aligning the groove; 18. an upper pressure head; 19. a lower pressure head; 20. a sample body; 21. a connecting ring; 22. an extensometer ring; 23. a connecting rod; 24. a pasting seat; 25. an upper pasting plate; 26. a lower adhesive plate; 27. a guide rail; 28. a slider; 29. a pressure plate; 30. and (5) pre-pressing the stud.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention provides a test device for simulating the performance of rock and soil body under the action of tension and compression dynamic waves, which comprises: the testing machine comprises a testing machine body 1, a universal tension and compression clamp, a lower tension and compression clamp and a sample tool;
an upper pull-press shaft 2 is arranged at the top of the testing machine body 1, and a lower pull-press shaft 3 is arranged at the bottom of the testing machine body 1;
the universal tension and compression clamp is connected with the upper tension and compression shaft 2, and the lower tension and compression clamp is connected with the lower tension and compression shaft 3; the sample frock sets up and draws between pressing anchor clamps and the lower clamp that draws.
Based on the testing machine body 1 capable of applying dynamic load, the testing equipment can realize the concentricity of the universal tension-compression clamp and the downward tension-compression clamp, ensure that the upper and lower pressing blocks are concentric under the condition that the tension-compression load appears circularly in the testing process, and improve the success rate of the test. The universal lower pull pressure anchor clamps of pressing anchor clamps and lower extreme of drawing of upper end, the laboratory is with the briquetting on the former instrument of anchor clamps replacement, through the adjustment operation, can realize that the universal anchor clamps of drawing and pressing and draw down to press anchor clamps concentric, and the universal setting of drawing and pressing anchor clamps can strengthen the flexibility when drawing the pressure test to the sample frock simultaneously.
According to a further optimized scheme, the universal pulling and pressing clamp comprises a pulling and pressing head, an upper locking nut 4, a joint bearing 5, a pressing cover 6, a connecting shaft 7 and a pulling and pressing seat;
the top of the upper pulling and pressing head is connected with the upper pulling and pressing shaft 2 through threads, an upper locking nut 4 is connected with the top of the upper pulling and pressing head through threads, and a connecting shaft 7 penetrates through the upper pulling and pressing head and the upper pulling and pressing seat; the knuckle bearing 5 is embedded at the bottom of the upper pulling and pressing head, the side surface of the gland 6 is connected with the side surface of the bottom of the upper pulling and pressing head through a bolt, the knuckle bearing 5 is arranged between the gland 6 and the upper pulling and pressing head, the knuckle bearing 5 and the gland 6 are sleeved on the connecting shaft 7, and the top surface of the sample tool is connected with the bottom surface of the upper pulling and pressing seat through a bolt.
The upper locking nut 4 arranged plays a role in limiting, the position of the upper pulling pressure head is fixed, the upper pulling pressure head can rotate within a rotation range by using the connecting shaft 7 as a rotation center through the arranged joint bearing 5, the top of the upper pulling pressure head is connected with the upper pulling pressure shaft 2 through threads in a matching mode, universal rotation is achieved, and the universal pulling pressure clamp and the lower pulling pressure clamp are adjusted to be concentric.
According to a further optimized scheme, the upper pulling pressing head comprises an upper threaded column 8, a first clamping and connecting plate 9, a bearing groove 10 and a limiting groove 11;
the upper threaded column 8 is in threaded connection with the upper pulling and pressing shaft 2, the upper locking nut 4 is in threaded connection with the upper threaded column 8, and the first clamping and connecting plate 9 is fixedly connected with the bottom surface of the upper threaded column 8; bearing groove 10 has been seted up to first joint board 9 side, and joint bearing 5 sets up in bearing groove 10, and spacing groove 11 has been seted up to bearing groove 10 notch department, and gland 6 sets up in spacing groove 11, and gland 6 passes through bolted connection with spacing groove 11.
Set up the screw thread post 8 and pass through threaded connection with last drawing last press spindle 2, can realize drawing the rotation of pressing anchor clamps on the plane to the universal, set up bearing groove 10 and be used for setting up joint bearing 5, set up spacing groove 11 and be used for placing gland 6, guarantee joint bearing 5's rigidity, improve experimental stability.
According to a further optimized scheme, the upper pulling and pressing seat comprises a pressing plate 12 and a second clamping and connecting plate 13;
two second clamping connection plates 13 are arranged and are arranged on the top surface of the pressing plate 12 in parallel, the bottom surface of each second clamping connection plate 13 is fixedly connected with the top surface of the pressing plate 12, and two side surfaces of the first clamping connection plate 9 are respectively abutted against the side surfaces of the two second clamping connection plates 13; the connecting shaft 7 penetrates through the first clamping plate 9 and the second clamping plate 13; the top surface of the sample tool is fixedly connected with the bottom surface of the pressing plate 12.
Set up the both sides face of first joint board 9 respectively with two second joint board 13 side butts, realize pull-up pressure seat and pull-up and peg graft between the pressure head, accomplish fixedly, make whole installation simple more swift, improve test efficiency.
Further optimize the scheme, the bottom surface of first joint board 9 and the top surface of second joint board 13 have all seted up the gap, and the gap is divided into two parts with the bottom of first joint board 9 and the top of second joint board 13, and the bottom of first joint board 9 and the top of second joint board 13 pass through ball pivot locking screw and connect.
The bottom of the first joint board 9 that sets up and the top of second joint board 13 are passed through ball pivot locking screw and are connected, cooperate with the gap of seting up, can realize solid to the card of connecting axle 7, accomplish to pull up to press the seat and pull up to press the head to be connected, and such setting simultaneously, when accomplishing experimental removal, it is simpler, improve loading and unloading speed.
In a further optimized scheme, the lower pulling and pressing clamp comprises a lower pulling and pressing head and a lower locking nut 14;
the bottom of the lower pull-down pressure head is connected with the lower pull-down pressure shaft 3 through threads, and the bottom of the lower locking nut 14 is connected with the bottom of the lower pull-down pressure head through threads.
In a further optimized scheme, the pull-down pressure head comprises a lower threaded column 15 and a connecting plate 16;
the bottom of the lower threaded column 15 is in threaded connection with the lower pressing shaft 3, the bottom surface of the connecting plate 16 is fixedly connected with the top surface of the lower threaded column 15, the bottom surface of the sample tool is connected with the top surface of the connecting plate 16 through a bolt, and the lower locking nut 14 is in threaded connection with the lower threaded column 15.
The lower lock nut 14 that sets up plays limiting displacement to the drop-down clamp, prevents that it from taking place the displacement in test process, avoids influencing the accurate nature of test data collection.
In a further optimized scheme, the centers of the bottom surface of the upper pulling and pressing seat and the top surface of the connecting plate 16 are respectively provided with an alignment groove 17.
The alignment groove 17 is formed to facilitate clamping and fixing of the test piece during concentric debugging before testing.
According to the further optimization scheme, the sample tool comprises an upper pressure head 18, a lower pressure head 19, a sample body 20, a connecting ring 21, an extensometer ring 22 and a connecting rod 23;
the upper pressure head 18 and the lower pressure head 19 are fixedly connected with the top surface and the bottom surface of the sample body 20 respectively, the bottom surface of the lower pressure head 19 is connected with the top surface of the connecting plate 16 through a bolt, and the top surface of the upper pressure head 18 is fixedly connected with the bottom surface of the pressure plate 12; the two extensometer rings 22 are respectively sleeved on the outer walls of the upper pressure head 18 and the lower pressure head 19, the connecting ring 21 is sleeved on the outer wall of the lower pressure head 19, the extensometer ring 22 positioned below is connected with the connecting ring 21 through bolts, and two ends of the connecting rod 23 are respectively connected with the upper pressure head 18 and the lower pressure head 19.
The upper pressure head 18 and the lower pressure head 19 are arranged to clamp and fix the sample body 20, and simultaneously, the universal tension and compression clamp and the lower clamp are used for carrying out axis alignment, so that the accuracy of axis alignment is improved, and the accuracy of a calibration pair test is improved.
A test method for simulating the performance of rock and soil body under the action of tension and compression dynamic waves comprises the following steps:
an upper pulling and pressing shaft 2 on a testing machine body 1 is connected with a universal pulling and pressing clamp through threads, and a lower pulling and pressing shaft 3 is connected with a lower pulling and pressing clamp through threads;
adjusting the position of a cross beam of the tester body 1, placing pull rods in alignment grooves 17 respectively formed in the centers of the bottom surface of the upper pull-press seat and the top surface of the connecting plate 16, applying a load of 200kN, locking the upper locking nut 4 and the lower locking nut 14, and removing the pull rods after locking; at the moment, the oil cylinder is in a free state, and concentric calibration is carried out on the universal tension and compression clamp and the lower tension and compression clamp.
Connecting the prepared sample tool with a universal tension and compression clamp and a lower tension and compression clamp through screws;
mounting a deformation sensor; and deformation data of the sample is collected, so that later-stage research is facilitated.
Preloading tension of 1kN, screwing up the spherical hinge locking screw, and eliminating gaps; the first clamping plate 9 and the second clamping plate 13 are clamped on the connecting shaft 7.
Tests were performed and data collected.
In one embodiment of the present invention, auxiliary means are provided to facilitate axial alignment of the sample body 20 with the upper and lower indenters 18, 19;
the auxiliary device comprises an adhesive seat 24, an upper adhesive plate 25, a lower adhesive plate 26, a guide rail 27, a slide block 28, a pressure plate 29 and a prepressing stud 30;
the upper pasting plate 25 and the lower pasting plate 26 are respectively fixedly connected with the top surface and the bottom surface of the pasting base 24, the side surface of the pasting base 24 is fixedly connected with a guide rail 27, one end of a sliding block 28 is fixedly connected with a pressure plate 29, the other end of the sliding block 28 is slidably connected with the guide rail 27, a sample tool is arranged between the upper pasting plate 25 and the lower pasting plate 26, a prepressing stud 30 penetrates through the upper pasting plate 25 and is fixedly connected with the pressure plate 29, and the bottom surface of the pressure plate 29 is abutted to the top surface of the sample tool. After the sample body 20 and the space between the upper pressure head 18 and the lower pressure head 19 are coated with the adhesive, the pre-pressing stud 30 is manually screwed down to compress the sample body, and the axes of the upper pressure head 18 and the lower pressure head 19 are adjusted to be aligned.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The above embodiments are only for describing the preferred mode of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (8)
1. The utility model provides a test equipment of ground physical property performance under simulation pulling and pressing dynamic wave effect which characterized in that includes: the testing machine comprises a testing machine body (1), a universal tension and compression clamp, a lower tension and compression clamp and a sample tool; an upper pulling and pressing shaft (2) is arranged at the top of the testing machine body (1), and a lower pulling and pressing shaft (3) is arranged at the bottom of the testing machine body (1); the universal pulling and pressing clamp is connected with the upper pulling and pressing shaft (2), and the lower pulling and pressing clamp is connected with the lower pulling and pressing shaft (3); the sample tool is arranged between the universal tension and compression clamp and the lower tension and compression clamp; the universal pulling and pressing clamp comprises a pulling and pressing head, a locking nut (4), a joint bearing (5), a gland (6), a connecting shaft (7) and a pulling and pressing seat; the top of the upper pulling and pressing head is connected with the upper pulling and pressing shaft (2) through threads, the upper locking nut (4) is connected with the top of the upper pulling and pressing head through threads, and the connecting shaft (7) penetrates through the upper pulling and pressing head and the upper pulling and pressing seat; the joint bearing (5) is embedded at the bottom of the upper pulling and pressing head, the side surface of the gland (6) is connected with the side surface of the bottom of the upper pulling and pressing head through a bolt, the joint bearing (5) is arranged between the gland (6) and the upper pulling and pressing head, the joint bearing (5) and the gland (6) are sleeved on the connecting shaft (7), the top surface of the sample tool is connected with the bottom surface of the upper pulling and pressing seat through a bolt, and the sample tool is further provided with an auxiliary device which is convenient for aligning the axis of a sample body (20) with an upper pressing head (18) and a lower pressing head (19); the test sample tool comprises an upper pressure head (18), a lower pressure head (19) and a test sample body (20), wherein the upper pressure head (18) and the lower pressure head (19) are fixedly connected with the top surface and the bottom surface of the test sample body (20) respectively; the auxiliary device comprises an adhesive base (24), an upper adhesive plate (25), a lower adhesive plate (26), a guide rail (27), a sliding block (28), a pressure plate (29) and a prepressing stud (30); the device is characterized in that an upper pasting plate (25) and a lower pasting plate (26) are respectively fixedly connected with the top surface and the bottom surface of a pasting seat (24), a guide rail (27) is fixedly connected to the side surface of the pasting seat (24), one end of a sliding block (28) is fixedly connected with a pressure plate (29), the other end of the sliding block (28) is slidably connected with the guide rail (27), a sample tool is arranged between the upper pasting plate (25) and the lower pasting plate (26), a prepressing stud (30) penetrates through the upper pasting plate (25) and is fixedly connected with the pressure plate (29), the bottom surface of the pressure plate (29) is abutted to the top surface of the sample tool, after an adhesive is smeared between a sample body (20) and an upper pressure head (18) and a lower pressure head (19), the prepressing stud (30) is manually screwed down to compress the sample body, and the axis of the upper pressure head (18) and the axis of the lower pressure head (19) are adjusted to be aligned.
2. The test device for simulating the performance of the rock-soil body under the action of the tension-compression dynamic waves according to claim 1, wherein: the upper pulling pressure head comprises an upper threaded column (8), a first clamping plate (9), a bearing groove (10) and a limiting groove (11); the upper threaded column (8) is in threaded connection with the upper pulling and pressing shaft (2), the upper locking nut (4) is in threaded connection with the upper threaded column (8), and the first clamping and connecting plate (9) is fixedly connected with the bottom surface of the upper threaded column (8); seted up first joint board (9) side bearing groove (10), joint bearing (5) set up in bearing groove (10), bearing groove (10) notch department has seted up spacing groove (11), gland (6) set up in spacing groove (11), just gland (6) with spacing groove (11) pass through bolted connection.
3. The test device for simulating the performance of the rock-soil body under the action of the tension-compression dynamic waves according to claim 2, wherein: the upper pulling and pressing seat comprises a pressing plate (12) and a second clamping and connecting plate (13); the number of the second clamping connection plates (13) is two, the two second clamping connection plates are arranged on the top surface of the pressing plate (12) in parallel, the bottom surface of the second clamping connection plate (13) is fixedly connected with the top surface of the pressing plate (12), and two side surfaces of the first clamping connection plate (9) are respectively abutted to the side surfaces of the two second clamping connection plates (13); the connecting shaft (7) penetrates through the first clamping and connecting plate (9) and the second clamping and connecting plate (13); the top surface of the sample tool is fixedly connected with the bottom surface of the pressing plate (12).
4. The test device for simulating the performance of the rock-soil body under the action of the tension-compression dynamic waves according to claim 3, wherein: gaps are formed in the bottom surface of the first clamping and connecting plate (9) and the top surface of the second clamping and connecting plate (13), the bottom of the first clamping and connecting plate (9) and the top of the second clamping and connecting plate (13) are divided into two parts through the gaps, and the bottom of the first clamping and connecting plate (9) is connected with the top of the second clamping and connecting plate (13) through a spherical hinge locking screw.
5. The test device for simulating the performance of the rock-soil body under the action of the tension-compression dynamic waves according to claim 4, wherein: the lower pull-press clamp comprises a lower pull-press head and a lower locking nut (14); the bottom of the lower pull-down pressing head is connected with the lower pull-down pressing shaft (3) through threads, and the bottom of the lower pull-down pressing head is connected with the lower locking nut (14) through threads.
6. The test device for simulating the performance of the rock-soil body under the action of the tension-compression dynamic waves according to claim 5, wherein: the lower pulling and pressing head comprises a lower threaded column (15) and a connecting plate (16); the bottom of the lower threaded column (15) is in threaded connection with the lower pulling and pressing shaft (3), the bottom surface of the connecting plate (16) is fixedly connected with the top surface of the lower threaded column (15), the bottom surface of the sample tool is in bolted connection with the top surface of the connecting plate (16), and the lower locking nut (14) is in threaded connection with the lower threaded column (15).
7. The test device for simulating the performance of the rock-soil body under the action of the tension-compression dynamic waves according to claim 6, wherein: the center of the bottom surface of the upper pulling and pressing seat and the center of the top surface of the connecting plate (16) are respectively provided with an aligning groove (17).
8. The test device for simulating the performance of the rock-soil body under the action of the tension-compression dynamic waves according to claim 6, wherein: the test sample tool further comprises a connecting ring (21), an extensometer ring (22) and a connecting rod (23); the bottom surface of the lower pressure head (19) is connected with the top surface of the connecting plate (16) through a bolt, and the top surface of the upper pressure head (18) is fixedly connected with the bottom surface of the pressure plate (12); extensometer ring (22) are provided with two, and establish respectively go up pressure head (18) with on the outer wall of pressure head (19) down, go up go-between (21) cover and establish down on the outer wall of pressure head (19), be located the below extensometer ring (22) with go-between (21) pass through bolted connection, connecting rod (23) both ends are connected respectively go up pressure head (18) with pressure head (19) down.
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| JP4805716B2 (en) * | 2006-04-18 | 2011-11-02 | 財団法人電力中央研究所 | Small material testing equipment |
| CN201277925Y (en) * | 2008-10-30 | 2009-07-22 | 河北理工大学 | Concrete stress-strain full curve test apparatus with loading speed controllable |
| CN103149078B (en) * | 2013-02-28 | 2014-07-02 | 西安理工大学 | Tension-compression-torsion-shearing coupling-based stress path triaxial apparatus |
| CN105258890A (en) * | 2015-11-20 | 2016-01-20 | 天津大学 | Device for testing anti-seismic performance of shear wall under tension, bending and shear composite action |
| CN206378363U (en) * | 2017-01-26 | 2017-08-04 | 珠海科迈尔仪器仪表有限公司 | Tension compression bidirectional test fixture and queen post dynamometer check system |
| CN206430906U (en) * | 2017-02-14 | 2017-08-22 | 重庆科技学院 | Measure the adjustable hinged-support attachment means of pressure |
| CN106996900B (en) * | 2017-05-16 | 2023-06-06 | 华北理工大学 | Axial tension and compression test device under constraint action and test method thereof |
| CN109387312A (en) * | 2017-08-04 | 2019-02-26 | 中国航空工业集团公司西安飞机设计研究所 | A kind of dynamometry tie system |
| CN209311204U (en) * | 2018-12-04 | 2019-08-27 | 济南三越测试仪器有限公司 | A kind of anti-backlash mechanism of long column tensile and compression testing machine |
| CN109975020A (en) * | 2019-05-07 | 2019-07-05 | 哈尔滨工程大学 | A kind of diesel engine connecting bar fatigue experiment fixture |
| CN210719932U (en) * | 2019-06-27 | 2020-06-09 | 中国石油天然气股份有限公司 | Friction wear sample fixing clamp |
| KR102281304B1 (en) * | 2019-07-11 | 2021-07-23 | 울산대학교 산학협력단 | Apparatus for testing weather strip |
| CN211401923U (en) * | 2019-11-27 | 2020-09-01 | 深圳艾利门特科技有限公司 | Clamp for tensile test of round bar-shaped sample piece |
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