CN211955050U - Direct shear test device - Google Patents
Direct shear test device Download PDFInfo
- Publication number
- CN211955050U CN211955050U CN202020373759.5U CN202020373759U CN211955050U CN 211955050 U CN211955050 U CN 211955050U CN 202020373759 U CN202020373759 U CN 202020373759U CN 211955050 U CN211955050 U CN 211955050U
- Authority
- CN
- China
- Prior art keywords
- test
- shearing
- shearing box
- shear
- box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model belongs to the technical field of civil engineering geotechnical material tests, in particular to a direct shear test device, which meets the test preparation requirements of shear samples with various structural sizes and improves the test efficiency of the shear samples; the device comprises a device test bed, wherein a shearing box is arranged on the device test bed, a central test hole is formed in the shearing box, a test sleeve is sleeved in the central test hole, and a shearing box upper cover is also arranged on the shearing box; a reaction frame body is arranged outside the shearing box, a hydraulic jack is arranged on the reaction frame body, a test shearing device is arranged on one side of the shearing box on a test bed of the device and used for applying horizontal shearing force to a sample in the shearing box step by step, and a shearing stress sensing device is also arranged on the other side of the shearing box on the test bed of the device; the utility model discloses a direct shear test device that provides, very big improvement the test data measurement accuracy of shearing the sample, realized automatic test data acquisition function.
Description
Technical Field
The utility model belongs to the technical field of civil engineering geotechnical material tests; in particular to a direct shear test device.
Background
With the continuous development and progress of the building foundation treatment technology in China, various new processes and new materials are continuously developed and applied, and the reinforcement materials generally play a role in enhancing the foundation soil body structure in the soil body, such as: geomembrane, geogrid, cement mixing pile, reinforced concrete pile, steel sheet pile, high polymer impervious wall and the like, can greatly improve the bearing capacity of the foundation under the combined action of a reinforcing material and a soil body, and is widely applied to foundation reinforcing engineering in recent years; however, under the action of the load on the upper part of the foundation, the contact surface of the reinforcing material and the soil body can generate shearing force, namely interfacial shearing force; the magnitude of the interface shear force is also an important parameter for evaluating the interface shear strength and pre-estimating the foundation bearing capacity, and most of the traditional measuring methods are measured by using the existing geotechnical direct shear apparatus; however, most geotechnical direct shear apparatus devices designed by the traditional structure have difficulty in manufacturing samples, most test data are read manually, great errors exist in the test and measurement process, and meanwhile, with the continuous deepening of the research on the size effect, the requirements of scientific researchers on multi-size direct shear test devices are increased; therefore, it is very necessary to provide a new direct shear test apparatus.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an inventive purpose:
the direct shear test device is mainly used for meeting the test preparation requirements of shear samples with various structural sizes and improving the preparation efficiency of the shear samples; the measurement precision of the test data of the shear sample is greatly improved, and the automatic test data acquisition function of the shear sample is improved; the automatic test requirement in the sample shearing process is met, the convenient applicability of the direct shear test device is improved, and the service life of the direct shear test device is prolonged.
The technical scheme of the utility model is that: the direct shear test device comprises a device test bed, wherein a shear box is arranged on the device test bed, a central test hole is formed in the shear box, a test sleeve is sleeved in the central test hole, and a shear box upper cover is also arranged on the shear box; a counter-force frame body is arranged outside the shearing box, a hydraulic jack is arranged on the counter-force frame body, the hydraulic jack tightly jacks the upper cover of the shearing box, and the shearing box is tightly pressed; a test shearing device is arranged on one side of a shearing box on a test bed of the device and used for gradually applying horizontal shearing force to the sample in the shearing box until the sample is sheared off; and a shearing stress sensing device is also arranged on the other side of the shearing box on the device test bed.
The height of the shearing box is 500 mm; the diameter of the central test hole is 200 mm; the wall thickness of the test sleeve is 5 mm-75 mm.
The shearing box and the upper cover of the shearing box are also provided with rivet holes with mutually corresponding positions, and rivets are inserted in the rivet holes.
The reaction frame body comprises reaction frame vertical rods which are vertically distributed with the device test bed, and the upper parts of the reaction frame vertical rods are fixedly provided with reaction frame upper top plates through locking nuts; the hydraulic jack is arranged at the central position of the upper top plate of the reaction frame.
The upper cover of the shearing box is also provided with a miniature pressure sensor for adjusting and controlling the pressure of the hydraulic jack.
The vertical rod of the reaction frame is also provided with a displacement sensor, the pushing end of the hydraulic jack is provided with a displacement sensor top plate, and a contact of the displacement sensor is tightly pressed on the displacement sensor top plate.
The test shearing device comprises a telescopic rod fixing table, a stepping telescopic rod is arranged on the telescopic rod fixing table, a first force transmission plate with an L-shaped structure is arranged at the front end of the stepping telescopic rod, and the first force transmission plate extends into a shearing box to apply horizontal shearing force to a test; a stepping telescopic rod bracket is further arranged on the device test bed, and a compression steel sheet and a fixing screw are arranged on the stepping telescopic rod bracket.
The shear stress sensing device comprises a dial indicator fixing table, wherein a dial indicator is arranged on the dial indicator fixing table through a locking screw; a second force transmission plate with an L-shaped structure is further arranged in the shearing box, and the contact of the dial indicator abuts against the second force transmission plate; and a shear sensor fixing frame is further arranged on the device test bed, a shear stress sensor is arranged on the shear sensor fixing frame, and a contact of the shear stress sensor is arranged in contact with the force transmission plate II.
A slide rail groove is also arranged on the device test bed, rolling steel balls are arranged in the slide rail groove, and the shearing box is arranged on the slide rail groove; the bottom of the device test bed is also provided with universal wheels.
And a data acquisition controller is also arranged on the upper top plate of the reaction frame and is used for acquiring and controlling the information of the test data.
The utility model has the advantages that:
the direct shear test device provided by the utility model not only meets the test preparation requirements of shear samples with various structural sizes, but also improves the preparation efficiency of the shear samples; the measurement precision of the test data of the shear sample is greatly improved, and the automatic test data acquisition function of the shear sample is improved; the automatic test requirement in the sample shearing process is met, the convenient applicability of the direct shear test device is improved, and the service life of the direct shear test device is prolonged.
Drawings
FIG. 1 is a schematic structural diagram of the direct shear test apparatus;
fig. 2 is a schematic diagram of the internal structure of the shear box of the direct shear test device.
In the figure: 1 is a device test bed; 2 is a cutting box; 3 is a central test hole; 4 is a test sleeve; 5 is an upper cover of the cutting box; 6 is a counter-force frame body; 7 is a hydraulic jack; 8 is a test shearing device; 9 is a shear stress sensing device; 10 is a rivet hole; 11 is a reaction frame vertical rod; 12 is a locking nut; 13 is a counter-force frame upper top plate; 14 is a miniature pressure sensor; 15 is a displacement sensor; 16 is a displacement sensor top plate; 17 is a telescopic rod fixing table; 18 is a stepping telescopic rod; 19 is a force transmission plate I; 20 is a stepping telescopic rod bracket; 21 is a compression steel sheet; 22 is a fixing screw; 23 is a dial indicator fixing table; 24 is a locking screw; 25 is a dial indicator; 26 is a force transmission plate II; 27 is a shear sensor fixing frame; 28 is a shear stress sensor; 29 is a slide rail groove; 30 is a rolling steel ball; 31 is a universal wheel; and 32 is a data acquisition controller.
Detailed Description
The following detailed description of embodiments of the present invention is made with reference to the accompanying drawings.
As shown in fig. 1-2, a direct shear test device is provided, which comprises a device test bed 1, a shear box 2 is arranged on the device test bed, a central test hole 3 is arranged in the shear box, a test sleeve 4 is sleeved in the central test hole, the shear box arranged in the test device is of a rectangular structure, the central test hole and the test sleeve arranged in the shear box are in a sleeved matching mode, test blocks can be prepared into test block structures with various sizes according to the structural sizes of the test sleeve, the manufacturing process is simple and convenient, and the manufacturing efficiency is high; the shearing box is also provided with a shearing box upper cover 5 which is used for pressing the shearing sample in the shearing box to carry out a shearing test process; a counter-force frame body 6 is arranged outside the shearing box, a hydraulic jack 7 is arranged on the counter-force frame body, the hydraulic jack tightly jacks the upper cover of the shearing box, and the shearing box is tightly pressed; a test shearing device 8 is arranged on one side of the shearing box on the test bed of the device and used for applying horizontal shearing force to the sample in the shearing box step by step until the sample is sheared off; and a shearing stress sensing device 9 is also arranged on the other side of the shearing box on the test bed of the device and is used for acquiring data information in the process of shearing the sample.
Preferably, the height of the shear box is 500 mm; the diameter of the central test hole is 200 mm; the wall thickness of the test sleeve is 5 mm-75 mm.
Preferably, still be provided with the rivet hole 10 that the position corresponds each other on shearing box and shearing box upper cover, it has the rivet to peg graft in the rivet hole, and the size of shearing box upper cover are unanimous with the size and the size of sample, and the rivet hole of setting is along shearing box corner symmetric arrangement, and rivet is put in to the downthehole disposition of rivet, prevents that shearing box and shearing box upper cover from taking place the dislocation, influences the experimental data result.
Preferably, the reaction frame body comprises reaction frame vertical rods 11 which are vertically distributed with the device test bed, the four reaction frame vertical rods are uniformly distributed on the periphery of the shearing box, and the upper parts of the reaction frame vertical rods are fixedly provided with reaction frame upper top plates 13 through locking nuts 12; the hydraulic jack is arranged at the central position of the upper top plate of the reaction frame.
Preferably, the upper cover of the shearing box is also provided with a miniature pressure sensor 14 for adjusting and controlling the pressure of the hydraulic jack, the miniature pressure sensor can be a heavy-load pressure sensor PX2 series, the heavy-load pressure sensor is a pressure measuring device with a shell, a metal pressure interface and a high-level signal output, the heavy-load pressure sensor is provided with a round metal or plastic shell, the appearance of the heavy-load pressure sensor is cylindrical, one end of the heavy-load pressure sensor is provided with the pressure interface, and the other end of the heavy-load pressure sensor is connected with a data acquisition controller for adjusting the pressure of the hydraulic jack.
Preferably, a displacement sensor 15 is further arranged on the vertical rod of the reaction frame, a displacement sensor top plate 16 is arranged at the pushing end of the hydraulic jack, a contact of the displacement sensor is arranged to press the displacement sensor top plate, and the arranged displacement sensor can be a 1900 series linear displacement sensor and converts linear mechanical displacement into an electric signal; and measuring the expansion displacement of the hydraulic jack.
Preferably, the test shearing device comprises a telescopic rod fixing table 17, a stepping telescopic rod 18 is arranged on the telescopic rod fixing table, a first force transfer plate 19 with an L-shaped structure is arranged at the front end of the stepping telescopic rod, and the first force transfer plate extends into the shearing box to apply horizontal shearing force to the test; a stepping telescopic rod bracket 20 is also arranged on the device test bed, and a compression steel sheet 21 and a fixing screw 22 are arranged on the stepping telescopic rod bracket; the stepping telescopic rod is fixed on the telescopic rod fixing table and the telescopic rod fixing frame through the fastening steel sheet and the fastening screw, the stepping telescopic rod can be connected with the data acquisition controller, and the stable controllable range of the stepping speed of 0-1.0 mm/min is realized through the data acquisition controller.
Preferably, a shear stress sensing device can be arranged in the measurement process of the shear stress, the shear stress sensing device comprises a dial indicator fixing table 23, and a dial indicator 25 is arranged on the dial indicator fixing table through a locking screw 24; a second force transmission plate 26 with an L-shaped structure is further arranged in the shearing box, and the contact of the dial indicator abuts against the second force transmission plate; the device is characterized in that a shear sensor fixing frame 27 is further arranged on the device test bed, a shear stress sensor 28 is arranged on the shear sensor fixing frame, a contact of the shear stress sensor is in contact with the second force transmission plate, in the selection process of the shear stress sensor, an optical fiber sensor can be selected, light from a light source is sent into a modulator through an optical fiber, after interaction between the parameter to be measured and the light entering a modulation area, the optical property of the light is changed, the light is called modulated signal light, and the influence exerted by the measured light on the transmission characteristic is utilized to finish measurement.
Preferably, in order to improve the friction force between the shearing box and the test bed of the shearing device and improve the service life and the measurement precision of the shearing device in the shearing test process, a slide rail groove 29 is further arranged on the test bed of the shearing device, a rolling steel ball 30 is arranged in the slide rail groove, and the shearing box is arranged on the slide rail groove in a clamping manner; the bottom of the device test bed is also provided with universal wheels 31.
Preferably, a data acquisition controller 32 is also arranged on the upper top plate of the reaction frame; the data acquisition controller is respectively connected with the miniature pressure sensor, the displacement sensor, the dial indicator, the shearing stress sensor, the hydraulic jack and the stepping telescopic rod; the method is used for information acquisition and control of test data.
The direct shear test device provided by the utility model not only meets the test preparation requirements of shear samples with various structural sizes, but also improves the preparation efficiency of the shear samples; the measurement precision of the test data of the shear sample is greatly improved, and the automatic test data acquisition function of the shear sample is improved; the automatic test requirement in the sample shearing process is met, the convenient applicability of the direct shear test device is improved, and the service life of the direct shear test device is prolonged.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
The above description is only illustrative of the present invention, and is not intended to limit the scope of the present invention, and any person skilled in the art can make equivalent changes and modifications without departing from the spirit and principles of the present invention, which should fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a direct shear test device, includes device test bench, its characterized in that: a shearing box is arranged on the device test bed, a central test hole is arranged in the shearing box, a test sleeve is sleeved in the central test hole, and a shearing box upper cover is also arranged on the shearing box; a counter-force frame body is arranged outside the shearing box, a hydraulic jack is arranged on the counter-force frame body, the hydraulic jack tightly jacks the upper cover of the shearing box, and the shearing box is tightly pressed; a test shearing device is arranged on one side of a shearing box on a test bed of the device and used for gradually applying horizontal shearing force to the sample in the shearing box until the sample is sheared off; and a shearing stress sensing device is also arranged on the other side of the shearing box on the device test bed.
2. A direct shear test apparatus according to claim 1, wherein: the height of the shearing box is 500 mm; the diameter of the central test hole is 200 mm; the wall thickness of the test sleeve is 5 mm-75 mm.
3. A direct shear test apparatus according to claim 1, wherein: the shearing box and the upper cover of the shearing box are also provided with rivet holes with mutually corresponding positions, and rivets are inserted in the rivet holes.
4. A direct shear test apparatus according to claim 1, wherein: the reaction frame body comprises reaction frame vertical rods which are vertically distributed with the device test bed, and the upper parts of the reaction frame vertical rods are fixedly provided with reaction frame upper top plates through locking nuts; the hydraulic jack is arranged at the central position of the upper top plate of the reaction frame.
5. A direct shear test apparatus according to claim 1, wherein: the upper cover of the shearing box is also provided with a miniature pressure sensor for adjusting and controlling the pressure of the hydraulic jack.
6. A direct shear test apparatus according to claim 4, wherein: the vertical rod of the reaction frame is also provided with a displacement sensor, the pushing end of the hydraulic jack is provided with a displacement sensor top plate, and a contact of the displacement sensor is tightly pressed on the displacement sensor top plate.
7. A direct shear test apparatus according to claim 1, wherein: the test shearing device comprises a telescopic rod fixing table, a stepping telescopic rod is arranged on the telescopic rod fixing table, a first force transmission plate with an L-shaped structure is arranged at the front end of the stepping telescopic rod, and the first force transmission plate extends into a shearing box to apply horizontal shearing force to a test; a stepping telescopic rod bracket is further arranged on the device test bed, and a compression steel sheet and a fixing screw are arranged on the stepping telescopic rod bracket.
8. A direct shear test apparatus according to claim 1, wherein: the shear stress sensing device comprises a dial indicator fixing table, wherein a dial indicator is arranged on the dial indicator fixing table through a locking screw; a second force transmission plate with an L-shaped structure is further arranged in the shearing box, and the contact of the dial indicator abuts against the second force transmission plate; and a shear sensor fixing frame is further arranged on the device test bed, a shear stress sensor is arranged on the shear sensor fixing frame, and a contact of the shear stress sensor is arranged in contact with the force transmission plate II.
9. A direct shear test apparatus according to claim 1, wherein: a slide rail groove is also arranged on the device test bed, rolling steel balls are arranged in the slide rail groove, and the shearing box is arranged on the slide rail groove; the bottom of the device test bed is also provided with universal wheels.
10. A direct shear test apparatus according to claim 4, wherein: and a data acquisition controller is also arranged on the upper top plate of the reaction frame and is used for acquiring and controlling the information of the test data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020373759.5U CN211955050U (en) | 2020-03-23 | 2020-03-23 | Direct shear test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020373759.5U CN211955050U (en) | 2020-03-23 | 2020-03-23 | Direct shear test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211955050U true CN211955050U (en) | 2020-11-17 |
Family
ID=73185021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020373759.5U Active CN211955050U (en) | 2020-03-23 | 2020-03-23 | Direct shear test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211955050U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323315A (en) * | 2020-03-23 | 2020-06-23 | 郑州大学 | Direct shear test device |
| CN114858621A (en) * | 2022-07-07 | 2022-08-05 | 四川省公路规划勘察设计研究院有限公司 | Mud rock on-site direct shear test method and equipment |
-
2020
- 2020-03-23 CN CN202020373759.5U patent/CN211955050U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111323315A (en) * | 2020-03-23 | 2020-06-23 | 郑州大学 | Direct shear test device |
| CN114858621A (en) * | 2022-07-07 | 2022-08-05 | 四川省公路规划勘察设计研究院有限公司 | Mud rock on-site direct shear test method and equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111323315A (en) | Direct shear test device | |
| CN211955050U (en) | Direct shear test device | |
| CN103837413B (en) | Concrete tensile creep testing device and concrete shrinkage stress creep testing method | |
| CN103267682A (en) | Device and method for testing material creep under coupling action of tensile stress and environment | |
| CN103674723A (en) | Test method for determining uniaxial tensile strength of soil mass | |
| CN101586993A (en) | Concrete early stage frost heave stress test device and test method | |
| CN102901670A (en) | Single-fiber reinforced-soil pullout test instrument | |
| CN110567773A (en) | rapid pressure-bearing forming device and method for physical similar material test piece | |
| CN105699203A (en) | Test device and method for measuring compressive strength of building materials under ambient pressure | |
| CN2672642Y (en) | Detector for earth work synthetic material friction property | |
| CN108225942B (en) | Large single shear apparatus for sludge-domestic garbage mixed landfill body and test method | |
| CN218212441U (en) | Side limit annular direct shear apparatus for simulating shear strength of pile-mudstone contact surface | |
| CN207556939U (en) | Combined earthwork sample sample preparation device | |
| CN113740517B (en) | Test device and test method for detecting grouting forming quality of steel pipe column foot | |
| CN213842965U (en) | Test device for coupling of concrete internal pressure stress and water pressure | |
| CN205839819U (en) | A kind of loading connecting structure for spread foundation full scale test | |
| CN210690180U (en) | Quick pressure-bearing forming device for physical similar material test piece | |
| CN210604102U (en) | Intelligent soil sample manufacturing device | |
| CN207730607U (en) | A kind of portable slump test device | |
| CN210375929U (en) | Concrete creep multifunctional test system | |
| CN109696400B (en) | Tunnel preliminary bracing and soil property surrounding rock bonding strength's testing arrangement | |
| CN219065153U (en) | Pile soil interface shear strength index measurement device | |
| CN214150390U (en) | Section steel and confined concrete bonding property push-out test device that slides | |
| CN219416906U (en) | Semitransparent sample pressing device for geotechnical test | |
| CN214472352U (en) | Concrete work deformation measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |