CN106872292B - Portable geosynthetic material comprehensive experiment instrument - Google Patents
Portable geosynthetic material comprehensive experiment instrument Download PDFInfo
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- CN106872292B CN106872292B CN201710191404.7A CN201710191404A CN106872292B CN 106872292 B CN106872292 B CN 106872292B CN 201710191404 A CN201710191404 A CN 201710191404A CN 106872292 B CN106872292 B CN 106872292B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive 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
- G01N2203/0014—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
- G01N2203/0025—Shearing
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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
- G01N2203/003—Generation of the force
- G01N2203/005—Electromagnetic 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
- G01N2203/0058—Kind of property studied
- G01N2203/0091—Peeling or tearing
Abstract
The application discloses a portable geosynthetic material comprehensive experiment instrument which comprises a vertical pressurizing device, a shearing box, a driving device, a data acquisition device, a tensile stripping experiment device and a foldable support, wherein the vertical pressurizing device is fixed on the support of the experiment instrument through bolts, a sliding chute with balls is arranged on a support, so that the shearing box can freely slide in the length direction, the driving device is fixed on one end of the experiment instrument through bolts and iron rods, the data acquisition device is fixed on the other end of the support of the experiment instrument through the support, the tensile stripping experiment device is fixed on the upper part of the support of the experiment instrument through T-shaped sliding rails and the support, and the foldable support can be conveniently folded through installing metal hinges. The experimental instrument can complete direct shear experiments of soil and stretching, friction, stripping and drawing experiments of geosynthetic materials, improves the consistency of the efficiency and experimental results of the experiments, and meets the requirements of the experiments in different places.
Description
Technical Field
The application relates to a portable geosynthetic material comprehensive experiment instrument.
Background
In the civil engineering field, geotechnical experiments are always basic modes of acquiring physical and mechanical performance indexes of soil materials, and some experimental indexes of the geotechnical synthetic materials are directly related to whether the geotechnical synthetic materials can be used in engineering, common geotechnical and geotechnical synthetic material experiments are carried out in a laboratory, different experimental devices such as direct shear experiments of soil are needed for different experiments, different experimental devices are needed for friction, drawing, stripping and stretching experiments of the geotechnical synthetic materials, the devices are often produced by different manufacturers, large differences in experimental accuracy and consistency of experimental results are achieved, large maintenance cost and experimental space are paid, the experimental devices used in the geotechnical experiments are quite high in price, and a series of experiments are burden to production units and teaching units. Some traditional experiment instruments are used in experiments with experimental equipment with larger errors, the experimental process needs to be performed manually, and the data are read manually, so that the accuracy of the experiment cannot be guaranteed. Thus, the geotechnical field needs an automatic comprehensive experimental device to meet the current experimental requirements.
Disclosure of Invention
In order to solve the problems, the application provides the portable tester integrating a plurality of experiments of drawing friction, direct shearing friction, stretching and stripping of the soil, which has complete functions, simplifies the experimental steps by adopting automatic experimental process and data acquisition equipment, improves the experimental accuracy and consistency, has small occupied space and can adapt to experimental environments of different places.
In order to achieve the above purpose, the present application adopts the following technical scheme:
a portable geosynthetic material comprehensive experiment instrument comprises a vertical pressurizing device, a shearing box, a driving device, a data acquisition device, a displacement measuring device, a stripping and stretching device and a bracket;
the shearing box comprises an upper cover, an upper box and a lower box which are sequentially arranged from top to bottom, and the upper box and the lower box can freely slide in the length direction; the lower box is arranged on the sliding rail and can freely slide along the length direction of the guide rail; the sliding rail is fixed on the bracket; a vertical pressurizing device is arranged above the upper cover to set vertical pressure on the shearing box; the driving device is connected with the lower box and drives the lower box and the upper box to move relatively;
the stripping and stretching device comprises a detachable stripping and stretching experiment support, a T-shaped chute support and a T-shaped sliding rail; the T-shaped sliding rail is arranged on the horizontal plane of the bracket, the T-shaped sliding chute support is arranged in the T-shaped sliding rail and can slide along the T-shaped sliding rail, and a V-shaped groove parallel clamp is respectively arranged on the stretching and peeling experiment support and the T-shaped sliding chute support; two V-shaped groove parallel clamps respectively clamp different layers of geosynthetic materials; the T-shaped chute support is connected with the hoisting device through a rope to realize the sliding along the T-shaped sliding rail;
the displacement measuring device is arranged on the bracket and is used for measuring different data of different experiments;
the data acquisition device acquires the pressure of the vertical pressurizing device and the relative displacement of the upper box and the lower box.
Further, balls are arranged between the T-shaped sliding rail and the T-shaped sliding groove support, so that relative sliding between the T-shaped sliding rail and the T-shaped sliding groove support becomes relative rolling.
Further, the vertical pressurizing device comprises a servo pressurizing device, the servo pressurizing device is arranged on a horizontal seat, two threaded rods with threads are arranged at the two ends of the horizontal seat, the top threads of the two threaded rods are matched with the horizontal seat, the bottom threads are matched with a fixing seat, nuts are arranged on the upper portion and the lower portion of the horizontal seat and the upper portion and the lower portion of the fixing seat, and the positions of the horizontal seat and the positions of the fixing seat are fixed.
Further, the servo pressurizing device drives a dowel bar, and the dowel bar applies vertical downward force to the shear box; and the servo pressurizing device is also connected with a pressure gauge and used for displaying the pressure of the servo pressurizing device.
Further, the dowel bar is in contact with a pressurizing positioning groove arranged at the top of the upper cover.
Further, the driving device comprises a motor, a gearbox and a push-pull device, wherein the motor can rotate in the forward and reverse directions and is connected with the gearbox; the gearbox can set for different rotational speeds and push-pull speeds for the push-pull device according to experimental requirements, and the push-pull device can provide stable displacement for experiments.
Further, the support be collapsible support, can be convenient fold the support through at support mounting metal fold paper, save space, conveniently carry.
Further, the displacement measuring device comprises a digital display type displacement sensor fixed on the bracket, and can display the displacement value in real time and provide data for the related device.
Furthermore, the push-pull device can also drive the push-pull device to advance or retreat through the hand-operated wheel, and the winding device is arranged on the rotating shaft of the hand-operated wheel.
Further, the data acquisition device comprises a display screen and a control button, and can display, control and record displacement and stress during experiments.
Further, fixing pins are fixed on the upper box and the lower box of the shearing box, and the fixing bolt of the upper box is inserted into the notch, so that the barb of the upper box support can hang the bolt and fix the position of the bolt; the fixing bolt of the lower box is inserted into the notch, and one end of the lower box of the shearing box abuts against the bolt of the lower box, so that the position of the lower box can be fixed.
The working principle of the application is as follows:
the driving device used in the soil direct shear experiment, the stretching experiment, the direct shear friction, the drawing friction and the stripping experiment of the geosynthetic material is the same, the driving device used in the original direct shear experiment can be used for the stretching and friction experiment of the geosynthetic material by refitting the clamp and fixing the position of the shearing box, and the small winch device arranged on the rotating shaft at one side of the motor can provide power for the stretching and stripping experiment of the geosynthetic material, so that one driving device can be used in five different experiments. The pressure gauge, the displacement gauge and the clamp used in the direct shear experiment can be correspondingly modified to be used for displaying and collecting data of other experiments through the data acquisition device, so that the density and the accuracy of experimental data can be improved. Five different experiments can be completed on the same experimental instrument through modification and replacement of simple experimental equipment, so that experimental resources can be greatly saved, and the accuracy of the experiments and the consistency of experimental results can be improved.
The beneficial effects of the application are as follows:
(1) The data acquisition device is adopted, so that experimental data can be displayed, collected and tidied in real time, and the efficiency and accuracy of experiments are greatly improved;
(2) All parts of the experimental instrument are detachable and universal, and can be used in different experiments, so that the utilization rate of experimental equipment parts is improved;
(3) The shearing box fixing bolt is designed, and the position of the shearing box can be fixed according to experimental requirements on the basis of conveniently disassembling the shearing box.
(4) The small winch device is arranged on the rotating shaft of the driving device, so that stable and sufficient displacement can be provided for the stretching and peeling experiment.
(5) The guide rail used by the special geosynthetic material stretching and stripping experimental device is designed, so that the stability and fluency of stretching and stripping experiments can be improved;
(6) The traditional lever pressurizing device is omitted, and the servo pressurizing device is adopted, so that the volume of the tester can be reduced, and the stability of experimental pressure can be improved.
(7) The tester has small design volume, the bracket is provided with the metal hinge, and the bracket can be folded to be convenient to move after the bolts are removed, so that the tester is suitable for experiments in different places.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of the experimental instrument;
FIG. 2 is a schematic view of the vertical compression apparatus of FIG. 1;
FIG. 3 is a schematic view of the shear box of FIG. 1;
FIG. 4 is a schematic diagram of the driving device in FIG. 1;
FIG. 5 is a schematic diagram of the data acquisition device of FIG. 1;
FIG. 6 is a schematic diagram of a stretch releasing apparatus;
FIG. 7 is a schematic diagram of an assembly of a direct shear and geosynthetic friction experiment with soil;
FIG. 8 is a schematic diagram of an assembly of geosynthetic material pullout experiments;
FIG. 9 is a schematic diagram of the geosynthetic material stretch and peel test assembly;
FIG. 10 is a schematic cross-sectional view of the T-shaped slide rail of FIG. 7;
fig. 11 is a schematic view of a bottom foldable stand.
Wherein the device comprises a 1-1 vertical pressurizing device, a 1-2 shearing box, a 1-3 driving device, a 1-4 data acquisition device, a 1-5 displacement sensor, a 1-6V-shaped groove parallel clamp, a 1-7 tester bracket, a 1-8 vertical pressurizing device fixing support, a 1-9 shearing box fixing bolt, a 2-1 servo pressurizing device, a 2-2 pressure gauge, a 2-3 dowel bar, a 2-4 pressurizing frame, a 2-5 fixing bolt, a 3-1 shearing box cover, a 3-2 shearing box upper box, a 3-3 shearing box lower box, a 3-4 pressurizing positioning groove, a 3-5 upper box support, a 3-6 lower box support, a 3-7V-shaped slide rail with balls, a 4-1 variable speed motor, a 4-2 motor power switch, a 4-3 power indicator lamp, a 4-4 variable speed gearbox, a 4-5 push-pull device, a 4-6 hand wheel, a 4-7 stress sensor, a 4-8 motor fixing support, a 4-9 small winch device, a 5-1 work indicator lamp, a 5-2 data display screen, a 5-3 control button, a 5-6T-6 data acquisition device, a 3-6T-6 support, a removable slide rail, a 1-6T-shaped support, a fixed support, a removable slide rail, a 1-6T-6 support, a tension-6T-6 support, a removable support, a geotechnique material, 11-1 metal foldout.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The application will be further described with reference to the drawings and examples.
As shown in FIG. 1, a portable geosynthetic material comprehensive tester comprises a vertical pressurizing device 1-1, a shearing box 1-2, a driving device 1-3, a data acquisition device 1-4, a displacement sensor 1-5, a V-shaped groove parallel clamp 1-6, a tester bracket 1-7 and a stretching stripping device shown in FIG. 6. The vertical pressurizing device is fixed on the tester support through a bolt, a sliding groove is formed in the lower portion of the shearing box and is fixed on the support through a ball and the sliding groove, the shearing box can freely slide in the length direction, the driving device is fixed on one end of the tester through the bolt and an iron rod, the data acquisition device is fixed on the other end of the tester support through the support, and the stretching and peeling experimental device is fixed on the upper portion of the tester support through a T-shaped sliding rail and a support.
The vertical pressurizing device 1-1 comprises a servo pressurizing device 2-1, a pressure gauge 2-2, a dowel bar 2-3 and a pressurizing frame 2-4, wherein the servo pressurizing device 2-1 can set initial pressure and compensate or reduce the pressure in real time in the experimental process, the pressure level is kept unchanged, the pressure gauge 2-2 is fixed on the servo pressurizing device 2-1 and can read the pressure of the servo pressurizing device, the servo pressurizing device 2-1 is fixed on the pressurizing frame 2-4 through bolts, the pressurizing frame 2-4 is fixed on a fixing support of the vertical loading device 1-8 through bolts, the upper end of the dowel bar 2-3 is connected with the servo pressurizing device, and the other end of the dowel bar is contacted with the pressurizing positioning groove 3-4 and can transmit the pressure generated by the servo pressurizing device to the shearing box 1-2.
The shearing box 3-2 is of a cuboid hollow structure with the outer dimension of 18 multiplied by 9 multiplied by 12cm and the inner dimension of 15 multiplied by 6.3 multiplied by 9cm, and mainly comprises three parts, wherein the upper part is a box cover 3-1, the thickness of the box cover is 2cm, the middle part is a shearing box upper box 3-2, the height is 4cm, and the shearing box upper box is fixed on a shearing box lower box 3-3 through a clamping groove and can freely slide in the length direction. The lower part is a lower shearing box 3-2 with the height of 6cm, the bottom of the lower shearing box is provided with a sliding groove, and the lower shearing box is connected with a sliding rail arranged on a base through a ball, and can also freely slide in the length direction. The upper shearing box and the lower shearing box are connected through a chute, and can freely slide in the length direction, the upper box support 3-5 and the lower box support 3-6 are respectively fixed on the upper box and the lower box through screws, and the upper box support 3-5 is provided with barbs; the upper box support 3-5 is connected with the detachable shearing box fixing support 8-2, a supporting gasket 8-1 is arranged between the upper box support and the detachable shearing box fixing support, and the lower box support 3-6 is connected with the push-pull device.
An upper box fixing bolt 9-1 and a lower box fixing bolt 9-2 are arranged on the upper box 3-2 and the lower box 3-3 of the shearing box;
the in-drawing geosynthetic material 9-3 is disposed between the shear box upper box 3-2 and the shear box lower box 3-3.
In the driving device, a motor 4-1 is connected with a speed change gear box 4-4 through gears, the speed change gear box 4-4 is also connected with a push-pull device 4-5 through gears, and the push-pull device 4-5 can convert the torque of the motor into uniform push-pull motion in the horizontal direction. The hand wheel 4-6 can be used for manually adjusting the push-pull device to be in a proper position, the stress sensor 4-7 is fixed at one end of the push-pull device through a bolt, the push-pull pressure can be monitored in the experimental process, and the other end of the stress sensor 4-7 is connected with the V-shaped groove parallel clamp. The small winch device 4-9 is arranged on the hand wheel shaft 4-6, can provide stable and sufficient displacement in a stretching and peeling experiment, and the displacement sensor 1-5 is connected with the other end of the push-pull device 4-5, can monitor the displacement according to the change of the push-pull device and transmits data to the data acquisition device 1-4.
The data acquisition device is provided with the working indicator lamp 5-1 which can display whether the instrument is in a normal working state, the data display screen 5-2 can display experimental data and experimental states in real time, and the control button 5-3 can display numerical values of the stress sensor and the displacement sensor, so that the experimenter can observe and record conveniently.
The stretching peeling experimental device comprises a detachable stretching peeling experimental support 6-1, a T-shaped chute support 6-3 and a T-shaped chute support 6-3, wherein one end of the T-shaped chute support 6-3 is connected with a winch 4-9 through a rope 6-5, a V-shaped groove parallel clamp is arranged at the other end of the T-shaped chute support, the T-shaped chute support 6-3 is matched with a T-shaped slide rail 6-4, and a V-shaped groove ball 9-1 is arranged in the T-shaped chute support, so that the T-shaped chute support can stably move with small friction; the detachable tensile stripping experiment support 6-1 is also provided with a V-shaped groove parallel clamp 1-6 which is opposite to the V-shaped groove parallel clamp; the two clamps respectively clamp the geosynthetic material 6-2, and when the windlass 4-9 rotates, the geosynthetic material 6-2 is peeled off.
According to the vertical pressurizing device, the servo pressurizing device is used for pressurizing, so that stable pressure can be provided for an experiment process, the pressure gauge is arranged on one side of the servo pressurizing device, the pressure can be observed intuitively, and the dowel bar can transmit the pressure to the shearing box.
The shearing box designs a new fixing mode, and the fixing pins of the upper box and the lower box can fix the position of the shearing box under different experimental requirements.
The driving device is characterized in that the driving device is a three-speed variable-direction gear system, the rotation of a motor is converted into push-pull motion, and experimental speeds of 0.02mm/min, 10mm/min and 50mm/min are respectively provided. And a small winch device is additionally arranged at the part of the hand-operated wheel, so that stable displacement can be provided for stripping and stretching experiments of geosynthetic materials.
The data acquisition device can collect displacement, stress and other data in the experimental process in real time and set experimental related parameters.
The stretching and stripping experimental device can reasonably utilize the driving device, and a small winch device is arranged on a rotating shaft of a hand-operated wheel of the driving device and can rotate along with the driving device, so that uniform displacement is provided for experiments.
The stretching and stripping experimental device is characterized in that a T-shaped sliding rail is designed for stabilizing the experimental process, and balls are arranged in the sliding rail groove and are matched with the sliding groove support.
The displacement sensing device calculates experimental displacement by measuring the displacement of the push-pull device, so that the complexity of measuring the displacement of different positions in each experiment is simplified. The displacement data can be transmitted to a data acquisition device for display and collection.
The device is detachable, and the stress sensor and the V-shaped groove horizontal clamp are applicable to different experiments.
The foldable support is provided with a metal hinge at the support position of the support, so that the support can be folded after the bolts are removed.
The following description of the experimental procedure is provided with reference to the accompanying drawings, and the main purpose of the experimental procedure is to introduce the use of each component, and the specific experimental method should refer to the experimental procedure in the relevant field.
A direct shear test schematic diagram of the soil is shown in fig. 8, and the detachable stretching and peeling test support 6-1 and the independent devices of the geosynthetic material 6-2 and the T-shaped chute support 6-3 in peeling can be detached according to test requirements. The experimental steps are as follows: firstly, an upper box support 3-5 is abutted against a detachable shearing box fixing support 8-2 through a supporting gasket 8-1, so that the upper shearing box 3-2 can be fixed, a 1-6V-shaped groove parallel clamp connected with a 4-7 stress sensor is abutted against a 3-6 lower box support through a rotating 4-6 hand crank, soil is loaded into the shearing box 1-2, a shearing box cover 3-1 is mounted, the position of a vertical pressurizing device 1-1 is adjusted, the lower end of a dowel bar 2-3 is vertically abutted against a pressurizing positioning groove 3-4, required pressure is applied through the servo pressurizing device 2-1, a variable speed motor 4-1 is turned on to adjust the push-pull device 4-5 to a gear of 0.02mm/min, a data acquisition device 1-4 is turned on, the inspection speed and the pressure setting are correct, the displacement sensor can normally monitor the displacement change, the motor and the data acquisition device are turned off after the experiment is finished, and corresponding cleaning work is performed.
The friction experiment of the geosynthetic material is different from the direct shear experiment of the soil only in that a layer of geosynthetic material is paved between the soil bodies of the upper box of the shearing box 3-5 and the lower box of the shearing box 3-6, and other settings are the same.
The drawing experimental schematic diagram of the geosynthetic material is shown in fig. 9, and the lower box support 3-6, the detachable stretching and peeling experimental support 6-1, the geosynthetic material 6-2 in peeling and the T-shaped chute support 6-3 can be removed according to the experimental requirements. The experimental steps are as follows: firstly, the supporting gasket 8-1 is removed, the vertical pressurizing device 1-1 and the shearing box 1-2 are moved, the upper box support 3-5 is directly propped against the detachable shearing box fixing support 8-2, then the upper box fixing bolt 9-1 is inserted into the notch, so that the bolt can be hung by a barb of the upper box support to fix the position of the bolt, the lower box fixing bolt 9-2 is inserted into the notch, and the position of the lower box bolt of the shearing box can be fixed by propping against the 9-2 at one end of the lower box 3-3 of the shearing box. Filling relevant soil into a lower shear box 3-3, paving a layer of geotechnical and material before the lower shear box 3-3 and an upper shear box 3-2, stretching out one end of a geosynthetic material, rotating a hand-operated wheel 4-6, pushing out a V-shaped groove parallel clamp 1-6 connected with a push-pull device 4-5 against the lower shear box 3-3, enabling the clamp to clamp the stretched geotechnical synthetic material, filling the upper shear box 3-2 with soil, covering a shear box cover 3-1, adjusting the position of a vertical pressurizing device 1-1, vertically supporting the lower end of a dowel bar 2-3 against a pressurizing positioning groove 3-4, applying required pressure through the servo pressurizing device 2-1, opening a variable speed motor 4-1 to adjust the backward pulling speed of the push-pull device 4-5 to a gear of 0.02mm/min, opening a data acquisition device 1-4, setting up the inspection speed and the pressure, normally monitoring displacement change, and then operating according to a highway test procedure of JTG 40-2007 after the displacement sensor, and closing the geotechnical material after the soil is stretched out of 2-3 cm. And after the experiment is finished, the motor and the data acquisition device are closed, and corresponding cleaning work is performed.
A schematic of a stripping test of geosynthetic material is shown in fig. 10, where the vertical compression device 1-1 and shear box 1-2 may be removed according to the test requirements. The stress sensor 4-7 is detached and installed on the detachable stretching peeling experiment support 6-1, the V-shaped groove parallel clamp 1-6 is installed on the stress sensor 4-7 and the T-shaped chute support 6-3 respectively, during peeling experiment, two layers of geosynthetic materials are torn off and fixed on the two clamps respectively, then the hand wheel 4-6 is rotated and the T-shaped chute support 6-3 is slid to enable the two clamps to tighten the geosynthetic materials, the hand wheel 4-6 is rotated after tightening the geosynthetic materials, the rope 6-5 is tightened, the variable speed motor 4-1 is turned on to adjust the backward pulling speed of the push-pull device 4-5 to a gear of 50mm/min, the data acquisition device 1-4 is turned on, the inspection speed and the pressure are set to be correct, the displacement sensor can normally monitor the displacement change, experiment operation can be carried out according to JTG E40-2007 highway geotechnical experiment rules, and the experiment can be closed after the T-shaped chute support 6-3 moves to 10 cm.
The stretch test and peel test set-up procedure for the geosynthetic material was the same except that the two ends of the 10cm length of geosynthetic material were each secured to the clamp rather than being pulled apart between the two layers, with the other set-up being the same.
While the foregoing description of the embodiments of the present application has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the application, but rather, it is intended to cover all modifications or variations within the scope of the application as defined by the claims of the present application.
Claims (8)
1. A portable geosynthetic material comprehensive experiment instrument is characterized in that: comprises a vertical pressurizing device, a shearing box, a driving device, a data acquisition device, a displacement measuring device, a stripping and stretching device and a bracket;
the shearing box comprises an upper cover, an upper box and a lower box which are sequentially arranged from top to bottom, and the upper box and the lower box can freely slide in the length direction; the lower box is arranged on the sliding rail and can freely slide along the length direction of the guide rail; the sliding rail is fixed on the bracket; a vertical pressurizing device is arranged above the upper cover to set vertical pressure on the shearing box; the driving device is connected with the lower box and drives the lower box and the upper box to move relatively;
the stripping and stretching device comprises a detachable stripping and stretching experiment support, a T-shaped chute support and a T-shaped sliding rail; the T-shaped sliding rail is arranged on the horizontal plane of the bracket, the T-shaped sliding chute support is arranged in the T-shaped sliding rail and can slide along the T-shaped sliding rail, and a V-shaped groove parallel clamp is respectively arranged on the stretching and peeling experiment support and the T-shaped sliding chute support; two V-shaped groove parallel clamps respectively clamp different layers of geosynthetic materials; the T-shaped chute support is connected with the hoisting device through a rope to realize the sliding along the T-shaped sliding rail;
the displacement measuring device is arranged on the bracket and is used for measuring different data of different experiments;
the data acquisition device acquires the pressure of the vertical pressurizing device and the relative displacement of the upper box and the lower box;
the ball is arranged between the T-shaped sliding rail and the T-shaped sliding groove support, so that the relative sliding between the T-shaped sliding rail and the T-shaped sliding groove support becomes relative rolling;
the vertical pressurizing device comprises a servo pressurizing device, the servo pressurizing device is arranged on a horizontal seat, two threaded rods with threads are arranged at the two ends of the horizontal seat, the top threads of the two threaded rods are matched with the horizontal seat, the bottom threads are matched with a fixing seat, nuts are arranged on the upper portion and the lower portion of the horizontal seat and the upper portion and the lower portion of the fixing seat, and the positions of the horizontal seat and the positions of the fixing seat are fixed.
2. The portable geosynthetic material synthesis tester according to claim 1, wherein: the servo pressurizing device drives a dowel bar, and the dowel bar applies vertical downward force to the shear box; and the servo pressurizing device is also connected with a pressure gauge and used for displaying the pressure of the servo pressurizing device.
3. The portable geosynthetic material synthesis tester according to claim 2, wherein: the dowel bar is contacted with a pressurizing positioning groove arranged at the top of the upper cover.
4. A portable geosynthetic material synthesis tester according to claim 3, wherein: the driving device comprises a motor, a gearbox and a push-pull device, wherein the motor can rotate in the forward and reverse directions and is connected with the gearbox; the gearbox can set for different rotational speeds and push-pull speeds for the push-pull device according to the experiment requirement, and the push-pull device can provide stable displacement for the experiment and is connected with the upper box.
5. The portable geosynthetic material synthesis tester according to claim 4, wherein: the push-pull device can also drive the push-pull device to advance or retreat through the hand-operated wheel, and the winding device is arranged on the rotating shaft of the hand-operated wheel.
6. The portable geosynthetic material synthesis tester according to claim 1, wherein: the displacement measuring device comprises a digital display type displacement sensor fixed on the support, and can display displacement values in real time and provide data for related devices.
7. The portable geosynthetic material synthesis tester according to claim 1, wherein: the data acquisition device is provided with a display screen and a control button, and can display, control and record displacement and stress during experiments.
8. The portable geosynthetic material synthesis tester according to claim 1, wherein: the upper box and the lower box are fixedly provided with fixing pins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN107356482B (en) * | 2017-07-31 | 2018-06-08 | 石家庄铁道大学 | Test the test platform of Creep of Geosynthetics performance |
| CN108645722B (en) * | 2018-05-23 | 2020-08-14 | 同济大学 | Large-size multifunctional interface dynamic shear tester and test method |
| CN109142062A (en) * | 2018-10-26 | 2019-01-04 | 镇江龙成绝缘材料有限公司 | A kind of polyimide molding part tube body bursting stress experimental rig and its application |
| CN109520838B (en) * | 2018-12-25 | 2023-12-15 | 西南交通大学 | Tensile property test device for shield tunnel bolt joint |
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