CN112432863B - Device and method for testing vertical bending resistance of geocell sheet - Google Patents
Device and method for testing vertical bending resistance of geocell sheet Download PDFInfo
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- CN112432863B CN112432863B CN202011306096.6A CN202011306096A CN112432863B CN 112432863 B CN112432863 B CN 112432863B CN 202011306096 A CN202011306096 A CN 202011306096A CN 112432863 B CN112432863 B CN 112432863B
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- 238000004088 simulation Methods 0.000 claims description 11
- 239000002689 soil Substances 0.000 claims description 11
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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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
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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
- G01N3/06—Special adaptations of indicating or recording means
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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
- G01N2203/0023—Bending
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
The invention provides a device and a method for testing the vertical bending resistance of a geocell sheet, belonging to the field of performance test of the geocell sheet, and comprising a frame, an upper clamp, a lower clamp, an adjusting unit and a testing unit; the lower clamp is fixedly connected to the frame; the adjusting unit is arranged above the frame; the upper clamp is connected with the adjusting unit and positioned right above the lower clamp, and the adjusting unit is used for adjusting the distance between the upper clamp and the lower clamp along the vertical direction; the test unit is connected to the upper clamp and used for sensing the displacement and the pressure of the moving end of the sheet to be tested. The device and the method for testing the vertical bending resistance of the geocell sheet effectively simulate the vertical load in the construction environment, can accurately and effectively test the bending resistance of the geocell sheet, have stable test performance, and provide an equipment foundation for further researching the construction damage condition of the geocell sheet in the actual engineering application process.
Description
Technical Field
The invention belongs to the technical field of geocell sheet performance testing, and particularly relates to a vertical bending resistance testing device for geocell sheets.
Background
The geocell belongs to a three-dimensional reinforced material, namely, a certain height is arranged along the vertical direction, and soil is filled in the geocell units to form a geocell reinforced composite body. In the construction process, the geocell can be subjected to the action of vertical loads of construction machinery, rolling equipment and the like, and the geocell sheet can be bent or even broken, so that the reinforcement effect of the geocell sheet is influenced; in addition, the types of materials of the geocell products commonly used in the current engineering are different, and the bending resistance of the geocell products is different. Therefore, bending resistance testing of the geocell sheet is required, but no special testing equipment exists at present, which causes the bending resistance of the geocell sheet to be difficult to accurately and effectively determine.
Disclosure of Invention
The invention aims to provide a device and a method for testing the vertical bending resistance of a geocell sheet, and aims to solve the technical problem that a device for testing the bending resistance of the geocell sheet is lacked in the prior art.
In order to realize the purpose, the invention adopts the technical scheme that: the utility model provides a vertical bending resistance capability test device of geotechnique's check room sheet, includes:
a frame;
the lower clamp is fixedly connected to the rack and used for clamping the lower end of the sheet to be detected;
the adjusting unit is arranged above the rack;
the upper clamp is connected to the adjusting unit and located right above the lower clamp, the upper clamp is used for clamping the lower end of a sheet to be detected, and the adjusting unit is used for adjusting the distance between the upper clamp and the lower clamp along the vertical direction; and
and the test unit is connected to the upper clamp and used for sensing the displacement and the pressure of the moving end of the sheet to be tested.
As another embodiment of the application, the frame comprises a base and an upper bracket, wherein the upper bracket is arranged on the upper part of the base;
the adjusting unit is a telescopic adjusting unit and is arranged on the upper support, the upper clamp is arranged at the telescopic end of the adjusting unit, and the lower clamp is arranged on the base.
As another embodiment of this application, the test unit includes pressure sensor and displacement sensor, pressure sensor locates go up the anchor clamps with between the regulating unit, displacement sensor locates go up on the anchor clamps.
As another embodiment of the application, the device for testing the vertical bending resistance of the geocell sheet further comprises a protection unit, wherein the protection unit is used for acquiring a displacement value of the moving end of the sheet to be tested and controlling the adjusting unit to stop when the displacement value exceeds a preset value.
As another embodiment of the present application, the upper jig and the lower jig each include:
the fixing seat is used for being connected with the rack or the adjusting unit;
the clamping seat is connected to the fixed seat and is U-shaped;
the adjusting rod penetrates through the supporting arm of the clamping seat; and
the clamp splice is equipped with two, two the clamp splice all is located between two arms of holder, and connect respectively in adjust the pole, it is used for adjusting two to adjust the pole the interval of clamp splice.
In another embodiment of the present application, the clamping surfaces of the two clamping blocks are respectively provided with a soft friction layer.
As another embodiment of the application, the clamping surface of the friction layer is provided with a bulge.
As another embodiment of this application, go up anchor clamps with anchor clamps still all include the top and push away the piece down, the top pushes away the piece and locates between two arms of grip slipper, and corresponding to the centre gripping space sets up, and right in the up-and-down direction the tip of the sheet that awaits measuring carries on spacingly.
As another embodiment of the present application, the ejector includes:
one end of the push rod is connected with the clamping seat; and
and the push plate is connected to the other end of the push rod and is used for contacting with the sheet to be detected.
The device for testing the vertical bending resistance of the geocell sheet provided by the invention has the following beneficial effects: compared with the prior art, the device for testing the vertical bending resistance of the geocell sheet provided by the invention has the advantages that the two ends of the sheet to be tested are clamped by the two clamps, the vertical load in a construction environment is simulated in the process that the upper clamp is controlled by the adjusting unit to move close to the lower clamp, meanwhile, the displacement data and the pressure data of the moving end of the sheet to be tested are obtained by the testing unit, and finally the bending resistance of the sheet to be tested is obtained by the displacement data and the pressure data. The device for testing the vertical bending resistance of the geocell sheet effectively simulates the vertical load in the construction environment, can accurately and effectively test the bending resistance of the geocell sheets made of different materials, and is special test equipment for the bending resistance of the geocell sheet.
The invention also provides a method for testing the vertical bending resistance of the geocell sheet, which is realized based on the device for testing the vertical bending resistance of the geocell sheet and comprises the following steps:
cutting the sheet to be detected along the height direction of the geocell;
adjusting the distance between the upper clamp and the lower clamp through an adjusting unit to enable the distance between the upper clamp and the lower clamp to be close to the height of the sheet to be measured;
enabling the upper clamp and the lower clamp to clamp the upper end and the lower end of the sheet to be tested respectively, and enabling the clamping positions of the upper clamp and the lower clamp to be aligned;
enabling the distance between the upper clamp and the lower clamp to be gradually reduced through an adjusting unit, and acquiring displacement data and pressure data of a moving end of the sheet to be tested through a testing unit;
and judging the bending resistance of the sheet to be detected according to the displacement data and the pressure data.
According to the method for testing the vertical bending resistance of the geocell sheet, provided by the invention, by adopting the device for testing the vertical bending resistance of the geocell sheet, the data related to the bending resistance can be obtained in the test environment for simulating the vertical load in the construction environment through a simple operation process, the data accuracy is high, and the method is favorable for accurately judging the bending resistance of the geocell sheet.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions 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 creative efforts.
Fig. 1 is a schematic front view of a vertical bending resistance testing device for geocell sheets according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a vertical bending resistance testing device for geocell sheets according to an embodiment of the present invention;
FIG. 3 is a schematic front view of a lower fixture used in the first embodiment of the present invention;
FIG. 4 is a schematic view of the working states of the upper and lower clamps used in the first embodiment of the present invention;
FIG. 5 is a left side view of FIG. 4;
FIG. 6 is a schematic view showing the working states of the upper and lower jigs used in the second embodiment of the present invention;
fig. 7 is a schematic front view of a lower fixture used in a third embodiment of the present invention;
fig. 8 is a schematic front view of a vertical bending resistance testing device for geocell sheets according to a fourth embodiment of the present invention;
FIG. 9 is a schematic front view of a simulation box according to a fourth embodiment of the present invention;
FIG. 10 is a schematic top view of the structure of FIG. 9;
FIG. 11 is a bottom view of the structure of FIG. 9;
fig. 12 is a state diagram of the door of fig. 11 opened.
In the figure: 1. a frame; 101. a base; 102. an upper bracket; 2-1, mounting a clamp; 2-2, a lower clamp; 201. a fixed seat; 202. a clamping seat; 203. adjusting a rod; 204. a clamping block; 205. aligning the laser emitter; 206. aligning the marking plate; 207. a handle; 208. a friction layer; 210. pushing the part; 2101. a push rod; 2102. pushing the plate; 3. an adjustment unit; 4. a test unit; 401. a pressure sensor; 402. a displacement sensor; 5. a sheet to be tested; 6. a protection unit; 7. a simulation box; 701. a box body; 702. a box door; 703. positioning a plate; 704. sleeving a notch; 705. the opening is located.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 2 and fig. 8, a vertical bending resistance testing apparatus for geocell sheets according to the present invention will now be described. The device for testing the vertical bending resistance of the geocell sheet comprises a frame 1, an upper clamp 2-1, a lower clamp 2-2, an adjusting unit 3 and a testing unit 4; the lower clamp 2-2 is fixedly connected to the frame 1 and used for clamping the lower end of the sheet 5 to be tested; the adjusting unit 3 is arranged above the frame 1; the upper clamp 2-1 is connected to the adjusting unit 3 and located right above the lower clamp 2-2, the upper clamp 2-1 is used for clamping the lower end of a sheet 5 to be measured, and the adjusting unit 3 is used for adjusting the distance between the upper clamp 2-1 and the lower clamp 2-2 in the vertical direction; the test unit 4 is connected to the upper clamp 2-1 and used for sensing the displacement and pressure of the moving end of the sheet 5 to be tested.
Compared with the prior art, the device for testing the vertical bending resistance of the geocell sheet disclosed by the invention has the advantages that the two ends of the sheet 5 to be tested are clamped by the two clamps, the vertical load in a construction environment is simulated in the process that the upper clamp 2-1 is controlled by the adjusting unit 3 to move close to the lower clamp 2-2, meanwhile, the displacement data and the pressure data of the moving end of the sheet to be tested are obtained by the testing unit, and finally, the bending resistance of the sheet 5 to be tested is obtained by the displacement data and the pressure data. The device for testing the vertical bending resistance of the geocell sheet effectively simulates the vertical load in the construction environment, can accurately and effectively test the bending resistance of the geocell sheets made of different materials, has stable testing performance, is special testing equipment for the bending resistance of the geocell sheet, and provides an equipment foundation for further researching the construction damage condition of the geocell sheet in the actual engineering application.
It should be noted that the upper clamp 2-1 and the lower clamp 2-2 are distributed vertically. Meanwhile, the two clamps cannot rotate or move laterally perpendicular to the up-down direction.
As a specific embodiment of the device for testing the vertical bending resistance of the geocell sheet provided by the present invention, please refer to fig. 1, 2, and 8, the frame 1 includes a base 101 and an upper bracket 102, the upper bracket 102 is disposed on the upper portion of the base 101; the adjusting unit 3 is a telescopic adjusting unit and is arranged on the upper support 102, the upper clamp 2-1 is arranged at the telescopic end of the adjusting unit 3, and the lower clamp 2-2 is arranged on the base. The telescopic adjusting unit is simple and compact in structure, cannot interfere with the installation of the clamp, and is beneficial to simplifying the overall structure of the equipment. In the embodiment, the rack 1 is of a vertical structure, occupies a small ground space, simulates a construction environment more truly, and is beneficial to acquiring more accurate data.
In this embodiment, the adjusting unit 3 can adopt a hydraulic telescopic member and a pneumatic telescopic member, and has a simple structure, is convenient to regulate and control, has strong power, and can meet the requirement of pressure testing.
Specifically, upper bracket 102 includes two stands that control the setting to and connect in the roof on stand top through threaded connection spare, the bottom of stand is connected in the base, upper bracket 102 overall structure is "door" shape, simple structure can not only provide effectual support, can also reserve sufficient installation space for last anchor clamps 2-1 and regulating unit 3.
As a specific implementation manner of the embodiment of the present invention, referring to fig. 1, fig. 2 and fig. 8, the testing unit 4 includes a pressure sensor 401 and a displacement sensor 402, the pressure sensor 401 is disposed between the upper clamp 2-1 and the adjusting unit 3, and the displacement sensor 402 is disposed on the upper clamp 2-1. When the moving upper clamp 2-1 receives the reaction force of the sheet 5 to be detected, the reaction force is transmitted to the pressure sensor 401, and the sensing data of the reaction force is the pressure applied to the sheet 5 to be detected; the displacement sensor 402 is arranged on one side of the movable upper clamp 2-1, and can be a photoelectric sensor, so that displacement data can be acquired in a non-contact testing mode. The test unit 4 of the embodiment has a simple and compact structure, can accurately acquire pressure data and displacement data related to the bending resistance, and is further beneficial to accurately judging the bending resistance.
Referring to fig. 1, 2 and 8, the device for testing vertical bending resistance of geocell sheets further includes a protection unit 6, where the protection unit 6 is configured to obtain a displacement value of a moving end of the sheet 5 to be tested, and control the adjustment unit 3 to stop when the displacement value exceeds a preset value. After the displacement value exceeds the preset value, the distance between the upper clamp 2-1 and the lower clamp 2-2 is too small, the two clamps are extruded and damaged by moving continuously, therefore, the displacement value is monitored through the protection unit 6, when the displacement value exceeds the preset value, the protection unit 6 judges that the distance between the two clamps is too small, the adjusting unit 3 can be controlled to stop, even if a tester forgets to press a brake button, the upper clamp 2-1 can also automatically stop moving downwards, and the purpose of protecting the clamps is achieved.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 1 to 8, the upper clamp 2-1 and the lower clamp 2-2 both include a fixing base 201, a clamping base 202, an adjusting rod 203 and a clamping block 204; the fixed seat 201 is used for being connected with the frame 1 or the adjusting unit 3; the clamping seat 202 is connected to the fixed seat 201, and the clamping seat 202 is U-shaped; the adjusting rod 203 penetrates through the supporting arm of the clamping seat 202; the clamping blocks 204 are two, the two clamping blocks 204 are located between the two support arms of the clamping base 202 and are respectively connected to the adjusting rod 203, and the adjusting rod 203 is used for adjusting the distance between the two clamping blocks 204. The clamp of the embodiment adopts a double-side clamping mode, so that the stress of the sheet 5 to be measured is more uniform.
As a specific implementation manner of the embodiment of the present invention, not shown in the figure, the adjusting rod 203 is slidably engaged with the clamping seat 202 along an axial direction of the adjusting rod 203, and the clamping block 204 can be driven to move by directly pulling the adjusting rod 203.
As an embodiment of the present invention, referring to fig. 1 to 6 and 8, two adjusting rods 203 are provided, the two adjusting rods 203 are respectively in threaded engagement with the two arms of the clamping base 202, and the two clamping blocks 204 are respectively rotatably connected to inner ends of the two adjusting rods 203. The structure of this embodiment has formed screw thread wedge anchor clamps of keeping silent, and its clamping-force increases gradually along with the degree of buckling of the sheet 5 that awaits measuring increases, has from the clamping function, can effectively avoid the sheet 5 that awaits measuring to break away from anchor clamps 2.
Referring to fig. 6 as a specific implementation manner of the embodiment of the present invention, in the upper clamp 2-1, one of the clamping blocks 204 is provided with an alignment laser emitter 205, in the lower clamp 2-2, one of the clamping blocks 204 is provided with an alignment mark plate 206 corresponding to the alignment laser emitter 205, the alignment mark plate 206 is provided with an alignment positioning mark, when the alignment mark is aligned in the middle of the laser emitted by the alignment laser emitter 205, it indicates that the positions of the clamping blocks in the two clamps correspond to each other, the sheet 5 to be measured is not inclined with respect to the up-down direction after being clamped, and the plate surface is parallel to the up-down direction.
Referring to fig. 7, as a specific implementation manner of the embodiment of the present invention, one adjusting rod 203 is provided, the adjusting rod 203 penetrates through two arms of the clamping base 202 and is rotatably matched with the clamping base 202, two sections of external threads with opposite rotation directions are provided on a portion of the adjusting rod 203 located between the two arms of the clamping base 202, and the two clamping blocks 204 are respectively in threaded fit with the two sections of external threads with opposite rotation directions, so as to be capable of being synchronously adjusted.
As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 8, a handle 207 is disposed at an end of the adjusting lever 203 and perpendicular to the adjusting lever 203, so as to facilitate screwing the adjusting lever 203.
Referring to fig. 3, 4, 6 and 7, as a specific implementation manner of the embodiment of the present invention, soft friction layers 208 are respectively disposed on the clamping surfaces of the two clamping blocks 204, so as to increase the friction between the clamping surfaces of the clamp and the sheet 5 to be tested, and make the clamping more firm.
Referring to fig. 3, 4, 6 and 7, in order to further increase the friction force of the clamping surface, a protrusion is disposed on the clamping surface of the friction layer 208.
Specifically, referring to fig. 3, 4, 6 and 7, the friction layer 208 is sticky and soft, and the protrusions are wavy.
As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 8, the upper clamp 2-1 and the lower clamp 2-2 further include a pushing member 210, and the pushing member 210 is disposed between the two arms of the clamping seat 202 and is disposed corresponding to the clamping space, so as to limit the end of the sheet 5 to be tested in the up-down direction during the process of adjusting the size of the clamping space, thereby improving the clamping efficiency. In addition, if the adjusting rod 203 is in a screw form, no matter the clamping block 204 is rotatably connected with the adjusting rod 203 or is in threaded fit with the adjusting rod 203, the pushing piece 210 can be arranged at a position which is attached to the end face of the clamping block 204, so that the clamping block 204 is limited, the clamping block 204 is prevented from rotating along with the adjusting rod 203, and the clamping block 204 is ensured to only move along the axial direction of the adjusting rod 203.
As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 8, the pushing member 210 includes a pushing rod 2101 and a pushing plate 2102; one end of the push rod 2101 is connected with the clamping seat 202; a push plate 2102 is attached to the other end of the push rod 2102 for contacting the sheet 5 to be tested. The pushing piece 210 is integrally T-shaped, the structure is simple, the pushing plate 2102 greatly increases the limiting area of the pushing piece 210, and the limiting reliability of the pushing piece 210 on the sheet 5 to be detected and the clamping block 204 is improved.
As a specific implementation manner of the embodiment of the present invention, not shown in the figure, the push rod 2101 is a telescopic member, and can push and pull the push plate 2102 in the up-down direction, so as to conveniently adjust the distance between the push plate 2102 and the clamping block 204 as required.
As a specific implementation manner of the embodiment of the present invention, referring to fig. 8 to 12, the device for testing vertical bending resistance of geocell sheets further includes a simulation box 7, and the simulation box 7 is used to be sleeved outside the upper clamp 2-1 and the lower clamp 2-2 and can be used to load a soil mass, so as to test the sheet 5 to be tested in a soil mass environment. Through setting up the simulation case for the vertical bending resistance capability test device of geotechnological check room sheet of this application can carry out bending resistance capability test in the air, also can test in the soil body environment of simulation, can improve the authenticity of construction environment simulation, and then improves the reliability of test.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 9 to 12, the simulation box 7 includes a box body 701, a plurality of box doors 702 and positioning plates 703, the front side of the box body 701 is left empty, the box doors 702 are provided with a plurality of box doors 702, the plurality of box doors 702 are distributed along the up-down direction and are respectively rotatably connected to the side edges of the empty place of the box body 702, the plurality of box doors 702 are matched to cover the empty place, the upper end and the lower end of the box body 701 are respectively provided with a sleeving notch 704, the box door 702 at the upper end and the box door 702 at the lower end are further provided with the positioning plates 703 corresponding to the sleeving notches 704, and the positioning plates 703 and the sleeving notches 704 are matched to form a positioning opening 705 for passing through the adjusting unit and the clamp at the lower end.
When the device is used, the box door 701 is completely opened, the upper and lower sleeving notches 704 are respectively sleeved at the adjusting unit 3 and the lower clamp 2-2, then the box door 702 at the lower end is closed, the box body is positioned through the positioning opening 705 at the lower end of the box body 701, soil is filled from the empty position, when the position is approximately parallel to the box door 702 at the lower end, the box door 702 adjacent to the box door 702 at the lower end is closed, the soil is filled again until the soil is filled to only the designated height, and then the test can be started.
As a specific implementation manner of the embodiment of the present invention, please refer to fig. 9, the heights of the box doors 702 are gradually reduced from bottom to top, the soil below can be filled at a faster speed, the soil needs to be filled more finely when the box doors reach an upward position, and enough filling operation space needs to be reserved, and the gradual change of the heights of the box doors 702 is beneficial to improving the filling efficiency and is convenient for the filling operation.
In the application, the base 101 is provided with a control room with a switch door, the control room can accommodate a control unit, the base 101 is provided with a button in communication connection with the control unit, the control unit is respectively in communication connection with the adjusting unit 3, the pressure sensor 401, the displacement sensor 402 and the protection unit 6, when the upper clamp 2-1 and the lower clamp 2-2 clamp the sheet 5 to be detected in place, the button sends a command to the control unit, so that the control unit controls the adjusting unit 3 to move, further the upper clamp 2-1 is driven to move downwards and gradually approach the lower clamp 2-2, during the period, the pressure sensor 401 senses pressure data borne by the moving clamp 2 in real time, the displacement sensor 402 senses moving displacement of the moving upper clamp 2-1 in real time, the pressure data and the moving displacement are fed back to the control unit, the control unit analyzes and displays the data, and further judges the bending resistance of the sheet 5 to be detected.
The protection unit 6 can also obtain a moving displacement value fed back by the position displacement sensor 402 in real time, when the moving displacement value exceeds a preset value, the protection unit 6 judges that the distance between the two clamps is too small, a stop command is sent to the control unit, and the control unit controls the adjusting unit 3 to stop according to the stop command, so that the situation that the two clamps are extruded and damaged due to too small distance is avoided.
The invention further provides a method for testing the vertical bending resistance of the geocell sheet. The method for testing the bending resistance of the geocell sheet is realized based on the device for testing the vertical bending resistance of the geocell sheet, and comprises the following steps:
cutting the sheet 5 to be detected along the height direction of the geocell;
the distance between the upper clamp 2-1 and the lower clamp 2-2 is adjusted through the adjusting unit 3, so that the distance between the upper clamp 2-1 and the lower clamp 2-2 is close to the height of the sheet 5 to be measured;
respectively clamping the upper end and the lower end of a sheet 5 to be detected by an upper clamp 2-1 and a lower clamp 2-2, and aligning the clamping positions of the upper clamp 2-1 and the lower clamp 2-2;
the distance between the upper clamp 2-1 and the lower clamp 2-2 is gradually reduced through the adjusting unit, and displacement data and pressure data of the moving end of the sheet 5 to be tested are obtained through the testing unit 4;
and judging the bending resistance of the sheet 5 to be detected according to the displacement data and the pressure data.
According to the method for testing the vertical bending resistance of the geocell sheet, provided by the invention, by adopting the device for testing the vertical bending resistance of the geocell sheet, the data related to the bending resistance can be obtained in the test environment of vertical load in the simulated construction environment through a simple operation process, the data accuracy is high, and the method is favorable for accurately judging the bending resistance of the geocell sheet.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Vertical bending resistance capability test device of geotechnological check room sheet, its characterized in that includes:
a frame;
the lower clamp is fixedly connected to the rack and used for clamping the lower end of the sheet to be detected;
the adjusting unit is arranged above the rack;
the upper clamp is connected to the adjusting unit and located right above the lower clamp, the upper clamp is used for clamping the lower end of a sheet to be detected, and the adjusting unit is used for adjusting the distance between the upper clamp and the lower clamp along the vertical direction; and
the test unit is connected to the upper clamp and used for sensing the displacement and the pressure of the moving end of the sheet to be tested;
the device for testing the vertical bending resistance of the geocell sheet further comprises a simulation box, wherein the simulation box is sleeved outside the upper clamp and the lower clamp and can bear a soil body so as to test the sheet to be tested in a soil body environment;
the simulation box comprises a box body, a plurality of box doors and a positioning plate, wherein the front side of the box body is reserved with a space, the plurality of box doors are distributed along the up-down direction and are respectively and rotatably connected with the side edge of the space reserved in the box body, the heights of the plurality of box doors are gradually reduced from bottom to top, the plurality of box doors are matched with and cover the space reserved, and the upper end and the lower end of the box body are respectively provided with a sleeving notch;
the box door positioned at the upper end and the box door positioned at the lower end are also provided with positioning plates corresponding to the sleeving notches, and the positioning plates are matched with the sleeving notches to form positioning openings through which the adjusting units and the clamps positioned at the lower ends can penetrate.
2. The geocell sheet vertical bending resistance test device according to claim 1, wherein the frame comprises a base and an upper bracket, and the upper bracket is arranged at the upper part of the base;
the adjusting unit is a telescopic adjusting unit and is arranged on the upper support, the upper clamp is arranged at the telescopic end of the adjusting unit, and the lower clamp is arranged on the base.
3. The geocell sheet vertical buckling resistance test apparatus of claim 2, wherein the test unit comprises a pressure sensor and a displacement sensor, the pressure sensor is disposed between the upper clamp and the adjustment unit, and the displacement sensor is disposed on the upper clamp.
4. The geocell sheet vertical bending resistance testing device according to claim 1, further comprising a protection unit, wherein the protection unit is used for acquiring a displacement value of a moving end of a sheet to be tested and controlling the adjusting unit to stop when the displacement value exceeds a preset value.
5. The geocell sheet vertical bend resistance testing device of claim 1, wherein the upper clamp and the lower clamp each comprise:
the fixed seat is used for being connected with the rack or the adjusting unit;
the clamping seat is connected to the fixed seat and is U-shaped;
the adjusting rod penetrates through the supporting arm of the clamping seat; and
the clamp splice is equipped with two, two the clamp splice all is located between two arms of holder, and connect respectively in adjust the pole, it is used for adjusting two to adjust the pole the interval of clamp splice.
6. The geocell sheet vertical bending resistance test device according to claim 5, wherein the clamping surfaces of the two clamping blocks are respectively provided with a soft friction layer.
7. The geocell sheet vertical bending resistance test device according to claim 6, wherein the friction layer is provided with a protrusion on the clamping surface.
8. The geocell sheet vertical bending resistance testing device according to claim 5, wherein the upper clamp and the lower clamp each further comprise an ejector, and the ejector is arranged between the two arms of the clamping seat and corresponds to the clamping space so as to limit the end of the sheet to be tested in the vertical direction.
9. The geocell sheet vertical bend resistance testing device of claim 8, wherein the pusher comprises:
one end of the push rod is connected with the clamping seat; and
and the push plate is connected to the other end of the push rod and is used for contacting with the sheet to be detected.
10. The method for testing the vertical bending resistance of the geocell sheet is realized based on the device for testing the vertical bending resistance of the geocell sheet according to any one of claims 1 to 9, and comprises the following steps:
cutting the sheet to be detected along the height direction of the geocell;
adjusting the distance between the upper clamp and the lower clamp through an adjusting unit to enable the distance between the upper clamp and the lower clamp to be close to the height of the sheet to be detected;
respectively clamping the upper end and the lower end of the sheet to be detected by the upper clamp and the lower clamp, and aligning the clamping positions of the upper clamp and the lower clamp;
enabling the distance between the upper clamp and the lower clamp to be gradually reduced through an adjusting unit, and acquiring displacement data and pressure data of a moving end of the sheet to be tested through a testing unit;
and judging the bending resistance of the sheet to be detected according to the displacement data and the pressure data.
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