CN210893942U - Geogrid drawing test device for simulating flexible top boundary - Google Patents
Geogrid drawing test device for simulating flexible top boundary Download PDFInfo
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- CN210893942U CN210893942U CN201921716547.6U CN201921716547U CN210893942U CN 210893942 U CN210893942 U CN 210893942U CN 201921716547 U CN201921716547 U CN 201921716547U CN 210893942 U CN210893942 U CN 210893942U
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Abstract
The utility model discloses a geogrid draws test device for simulating flexible top boundary, including placing the drawing box on the cushion cap, it has the cross slot to open on the lateral wall of drawing box, and geogrid stretches into the drawing box through the cross slot level and separates into epicoele and cavity of resorption with the drawing box, fills up full of soil material in epicoele and cavity of resorption respectively, is equipped with rotatable and the smooth rigidity loading mechanism of bottom surface level in the soil material upper end of epicoele, has constructed the support frame on the cushion cap, has suspension on the support frame and has loading mechanism, and the vertical top of loading mechanism's output connects in the upper end of rigidity loading mechanism. The utility model discloses because rigidity loading mechanism is rotatable, avoid adopting gasbag or water bag simulation flexible top boundary test in-process it under the high pressure, exceed the limit pressure-bearing value of gasbag or water bag, appear being pressed the phenomenon of exploding, and more accurate at the change law in-process of simulation muscle soil interface characteristic, the geogrid that is applicable to simulation flexible top boundary draws the characteristic.
Description
Technical Field
The utility model belongs to the technical field of geosynthetic material draws test device, specifically speaking relates to a geogrid draws test device for simulating flexible top boundary.
Background
In geogrid pull tests, vertical loads are often applied using rigid or flexible top boundary conditions. For the flexible top boundary condition, the existing pulling test device is usually based on the vertical load applied by the rigid loading plate, and the pulling test is explored by placing the flexible material such as an air bag or a water bag on the rigid loading plate to simulate the flexible top boundary. The flexible material of the air bag or the water bag has the defects of low strength and low rigidity, and the change rule of the interface characteristic of the reinforced soil is influenced because the bottom surface of the air bag or the water bag is provided with an inflation inlet or a water inlet which is uneven.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve geogrid and draw this kind of flexible material of gasbag or water bag in the test process and have intensity, shortcoming that rigidity is low to inflation inlet or water inlet unevenness are left to its bottom surface, have influenced the geogrid that is used for simulating flexible top border of the change law of muscle soil interface characteristic and have drawn test device.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a geogrid draws test device for simulating flexible top boundary, is including placing on the cushion cap and upper portion open-ended drawing box, and it has the cross slot to open on drawing box's lateral wall, and geogrid stretches into in the drawing box and separates into epicoele and cavity of resorption with drawing box through the cross slot level, in epicoele and cavity of resorption are filled with the soil material respectively, are equipped with rotatable and the smooth rigidity loading mechanism of bottom surface level in the soil material upper end of epicoele, in it has the support frame to construct on the cushion cap, has the loading mechanism to hang on the support frame, the vertical apical grafting of the output of loading mechanism in the upper end of rigidity loading mechanism.
Furthermore, the rigid loading mechanism comprises a rigid plate horizontally placed at the upper end of the soil material of the upper cavity, a pressure bearing plate is rotatably connected to the rigid plate, and the output end of the pressurizing mechanism is pressed against the upper end face of the pressure bearing plate.
Furthermore, the upper end face of the rigid plate is provided with a groove which extends along the horizontal direction and has a circular arc-shaped cross section, the extending direction of the groove is vertical to the direction in which the geogrid is horizontally pulled, the lower end of the pressure bearing plate is provided with a bearing strip, the end part of the bearing strip is matched with the groove, and the end part of the bearing strip is assembled in the groove.
Furthermore, accept the strip and include the connecting strip of being connected with the bearing plate lower extreme and keep away from bearing plate one end with the connecting strip and be connected the rotation strip, the thickness of connecting strip is less than the thickness of rotation strip.
Furthermore, two ends of the rigid plate along the drawing direction of the geogrid are respectively constructed into inclined planes, and the two inclined planes are parallel.
Further, the angle of the two inclined surfaces is 45 degrees.
Furthermore, the support frame is provided with a first cross beam positioned right above the drawing box and a second cross beam positioned below the first cross beam, the pressurizing mechanism is arranged on the first cross beam, and the output end of the pressurizing mechanism penetrates through the second cross beam and is propped against the upper end of the rigid loading mechanism.
Furthermore, a guide sleeve for the output end of the pressurizing mechanism to pass through is formed on the second cross beam.
Furthermore, a connecting plate is fixedly arranged at the end part of the output end of the pressurizing mechanism, the connecting plate is detachably connected with a loading plate, and the horizontal top of the loading plate presses the upper end of the rigid loading mechanism.
The utility model discloses owing to adopted foretell structure, it compares with prior art, and the technical progress who gains lies in: the geogrid is clamped by a clamp and horizontally drawn, soil materials at the upper end and the lower end of the geogrid are subjected to shear expansion along with the movement of the geogrid due to the embedding effect of the geogrid, the soil material at the drawn end of the geogrid moves upwards, soil fillers at the other end of the geogrid move downwards, the soil materials are integrally rotated, the upward moving soil materials can apply upward force to a loading plate at the top boundary of the upper cavity, the rigid loading mechanism can correspondingly rotate after receiving the upward force, the rigid loading mechanism rotates along with the soil material surface at the lower part, and the rigid loading mechanism transmits vertical load applied by the pressurizing mechanism; in conclusion, the rigid loading mechanism can rotate, so that the phenomenon that the pressure explosion phenomenon occurs when the limit pressure-bearing value of the air bag or the water bag is exceeded under high pressure in the conventional process of simulating the flexible top boundary by adopting the air bag or the water bag is avoided; present test device need make gasbag or water bag, when making gasbag or water bag, need stay inflation inlet or water inlet, can cause the surperficial unevenness on flexible top boundary like this, place gasbag or water bag under rigidity loading mechanism when, must with inflation inlet or water inlet down, and put into the soil material, influenced the change law of flexible top boundary condition muscle soil interface characteristic like this, because rotatable rigidity loading mechanism's bottom surface is level and smooth, can not influence the change law of muscle soil interface characteristic, and then make the utility model discloses it is more accurate in the change law in-process of simulation muscle soil interface characteristic.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
In the drawings:
fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a structural sectional view of an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a pressure-bearing unit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a rigid plate according to an embodiment of the present invention.
Labeling components: 1-bearing platform, 2-drawing box, 3-transverse groove, 4-rigid plate, 401-groove, 5-bearing unit, 501-bearing plate, 502-connecting bar, 503-rotating bar, 6-first upright post, 7-second upright post, 8-first cross beam, 9-second cross beam, 901-guide sleeve, 10-hydraulic cylinder, 11-hydraulic rod, 12-connecting plate, 13-loading plate and 14-geogrid.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the invention.
The utility model discloses a geogrid drawing test device for simulating flexible top boundary, as shown in figure 1-2, comprising a bearing platform 1, a drawing box 2, a geogrid 14, a rigid loading mechanism, a support frame and a pressurizing mechanism, wherein the drawing box 2 is horizontally placed on the bearing platform 1, the upper opening of the drawing box 2 is in an open state, two opposite side walls of the drawing box 2 are respectively provided with a transverse groove 3, the two transverse grooves 3 are oppositely arranged, the length direction of the transverse groove 3 extends along the horizontal direction, the drawing box 2 is filled with soil material until the transverse groove 3 is positioned, the geogrid 14 horizontally extends into the drawing box 2 through one transverse groove 3, the geogrid 14 is horizontally attached to the upper end surface of the soil material, then the drawing box 2 is filled, namely the soil material is filled from the upper part of the drawing box 2 until the drawing box 2 is filled, and the leveling of the upper part of the filler is ensured, at the moment, the geogrid 14 divides the drawing box 2 into an upper cavity and a lower cavity, then, a rigid loading mechanism with a flat and smooth bottom surface is arranged on the upper end face of the soil material in the upper cavity, the supporting frame is constructed on the bearing platform 1, the pressurizing mechanism is hung on the supporting frame and is fixedly connected with the supporting frame, the output end of the pressurizing mechanism is vertically abutted to the upper end of the rigid loading mechanism, and the pressurizing mechanism is used for providing vertical load for the soil material in the drawing box 2. The utility model discloses a working process and principle do: the vertical load of the pressurizing mechanism is adjusted, the geogrid 14 is clamped through the clamp and horizontally drawn, the soil materials at the upper end and the lower end of the geogrid 14 are sheared and expanded along with the movement of the geogrid 14 due to the embedding effect of the geogrid 14, the soil material at the drawn end of the geogrid 14 rotates upwards, the soil material at the other end of the geogrid 14 moves downwards, the soil materials are enabled to rotate integrally, the upward moving soil materials can provide an upward force for the upper cavity top boundary loading plate 13, the rigid loading mechanism can rotate correspondingly after receiving the upward force, and the rigid loading mechanism can rotate along with the lower filling surface. The utility model has the advantages that: (1) because the air bag or the water bag exceeds the limit pressure-bearing value of the air bag or the water bag under high pressure, the phenomenon of pressure explosion can occur, the rotatable rigid loading mechanism of the utility model has high strength, and the dangerous phenomenon is avoided; (2) the air bag or the water bag is made of flexible materials and is mostly made of rubber materials, if the filling materials adopted in the drawing test are broken gravels, under the condition that the broken gravels are displaced along with the drawing of the geogrid 14 due to the embedding effect, the surface of the material is scratched and damaged in the process of multiple tests by the rubber materials, and the rotatable rigid loading mechanism is high in rigidity, friction-resistant and long in service life; (3) when preparation gasbag or water bag, need leave inflation inlet or water inlet, will lead to the fact surface unevenness like this, place gasbag or water bag under rigid plate 4 the time, must with inflation inlet or water inlet down to in putting the filler, influenced the change law of flexible top boundary condition muscle soil interface characteristic like this, rotatable rigidity loading mechanism's bottom surface is level and smooth, can not influence the change law of muscle soil interface characteristic, makes the utility model discloses it is more accurate at the change law in-process of simulation muscle soil interface characteristic.
As a preferred embodiment of the present invention, as shown in fig. 3-4, the rigid loading mechanism includes a rigid plate 4 and a pressure-bearing unit 5, the pressure-bearing unit 5 includes a pressure-bearing plate 501, the rigid plate 4 is horizontally placed on the upper end of the soil material on the upper cavity of the drawing box 2, the pressure-bearing plate 501 is rotatably connected with the rigid plate 4 and is located above the rigid plate 4, and the output end of the pressurizing mechanism is pressed against the upper end surface of the pressure-bearing plate 501. The concrete rotation connection mode of the rigid plate 4 and the bearing plate 501 is as follows: the upper end surface of the rigid plate 4 is provided with a groove 401, the groove 401 extends along the horizontal direction and has a circular arc-shaped cross section, and the extending direction of the groove 401 is perpendicular to the direction in which the geogrid 14 is horizontally pulled. At the lower end of the bearing plate 501, a receiving strip is formed, the end of which fits into the groove 401. The concrete structure of accepting the strip does: as shown in fig. 3, the receiving bar includes a connecting bar 502 and a rotating bar 503, the connecting bar 502 is configured at the lower end of the pressure bearing plate 501, the rotating bar 503 is configured at one end of the connecting bar 502 far from the pressure bearing plate 501, and the pressure bearing plate 501, the connecting bar 502 and the rotating bar 503 are integrally formed, wherein the thickness of the connecting bar 502 is smaller than that of the rotating bar 503, and is configured to rotate the rigid plate 4 around the center line of the rotating bar 503, and the connecting bar 502 reserves the rotating space of the rigid plate 4.
As a preferred embodiment of the present invention, as shown in fig. 4, the inner wall of the drawing box 2 is the same in size as the length and width of the rigid plate 4, and the rigid plate 4 is cut at both ends of the drawing direction along the geogrid 14, and is further configured as an inclined plane, and the two inclined planes are parallel, the upward rotating soil material will give an upward force to the top boundary rigid plate 4, the rigid plate 4 rotates after receiving the upward force, and the inclined plane is provided so that the rigid loading plate 13 rotates along with the soil material surface under the rigid loading plate. The angle of inclination of the inclined surface is preferably 45 °.
As a preferred embodiment of the present invention, as shown in fig. 1, the pressurizing mechanism is a hydraulic cylinder 10, the end of the hydraulic rod 11 of the hydraulic cylinder 10 is fixedly mounted with a connecting plate 12, the connecting plate 12 is detachably connected with a loading plate 13 through a bolt, the loading plate 13 is pressed on the upper end of the bearing plate 501 under the driving of the hydraulic rod 11, so as to provide a vertical load, the size of the vertical load applied by the hydraulic servo mode control hydraulic cylinder 10 driving the hydraulic rod 11 during the test process is controlled, and the vertical load is transmitted to the loading plate 13 by the hydraulic rod 11.
As a preferred embodiment of the present invention, as shown in fig. 1, the supporting frame includes a first beam 8, a second beam 9, two first columns 6 and two second columns 7, two first columns 6 are respectively installed on the bearing platform 1 at two opposite sides of the drawing box 2, two second columns 7 are respectively installed on the bearing platform 1 at two opposite sides of the drawing box 2 and located between two first columns 6, the first beam 8 is located directly above the drawing box 2, the second beam 9 is located below the first beam 8 and located directly above the drawing box 2, the hydraulic cylinder 10 is fixedly installed on the first beam 8, and the hydraulic rod 11 thereof penetrates through the second beam 9 and is pressed on the upper end of the rigid loading mechanism through the loading plate 13. In order to increase the accuracy of the guidance of the hydraulic rod 11 to avoid slight deviations, a guide 901 is formed on the second cross member 9, through which the hydraulic rod 11 passes, the guide 901 coinciding with the axis of the hydraulic rod 11.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the protection of the claims of the present invention.
Claims (9)
1. The utility model provides a geogrid draws test device for simulating flexible top border which characterized in that: including placing on the cushion cap and upper portion open-ended drawing box, it has the cross slot to open on drawing box's lateral wall, and geogrid stretches into in drawing box and will draw the box through the cross slot level and separate into epicoele and cavity of resorption, in epicoele and cavity of resorption are full of the soil material respectively, are equipped with rotatable and the even smooth rigid loading mechanism of bottom surface in the soil material upper end of epicoele, in it has the support frame to construct on the cushion cap, and the suspension has the loading mechanism on the support frame, the vertical apical grafting of loading mechanism in the upper end of rigid loading mechanism.
2. The geogrid pull test apparatus for simulating a flexible top boundary of claim 1, wherein: the rigid loading mechanism comprises a rigid plate horizontally placed at the upper end of the soil material of the upper cavity, a pressure bearing plate is rotatably connected onto the rigid plate, and the output end of the pressurizing mechanism is pressed against the upper end face of the pressure bearing plate.
3. The geogrid pull test apparatus for simulating a flexible top boundary of claim 2, wherein: the upper end face of the rigid plate is provided with a groove which extends along the horizontal direction and has a circular arc-shaped cross section, the extending direction of the groove is vertical to the direction in which the geogrid is horizontally pulled, the lower end of the pressure bearing plate is provided with a bearing strip with an end part matched with the groove, and the end part of the bearing strip is assembled in the groove.
4. A geogrid pull test apparatus for simulating a flexible top boundary according to claim 3, wherein: the bearing strip comprises a connecting strip connected with the lower end of the bearing plate and a rotating strip connected with one end, far away from the bearing plate, of the connecting strip, and the thickness of the connecting strip is smaller than that of the rotating strip.
5. The geogrid pull test apparatus for simulating a flexible top boundary of claim 2, wherein: and two ends of the rigid plate along the drawing direction of the geogrid are respectively formed into inclined planes, and the two inclined planes are parallel.
6. The geogrid pull test apparatus for simulating a flexible top boundary of claim 5, wherein: the angle of the two inclined planes is 45 degrees.
7. The geogrid pull test apparatus for simulating a flexible top boundary of claim 1, wherein: the supporting frame is provided with a first cross beam positioned right above the drawing box and a second cross beam positioned below the first cross beam, the pressurizing mechanism is arranged on the first cross beam, and the output end of the pressurizing mechanism penetrates through the second cross beam and is propped against the upper end of the rigid loading mechanism.
8. The geogrid pull test apparatus for simulating a flexible top boundary of claim 7, wherein: and a guide sleeve for the output end of the pressurizing mechanism to pass through is formed on the second cross beam.
9. The geogrid pull test apparatus for simulating a flexible top boundary of claim 1, wherein: and a connecting plate is fixedly arranged at the end part of the output end of the pressurizing mechanism, the connecting plate is detachably connected with a loading plate, and the horizontal top of the loading plate presses the upper end of the rigid loading mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921716547.6U CN210893942U (en) | 2019-10-14 | 2019-10-14 | Geogrid drawing test device for simulating flexible top boundary |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921716547.6U CN210893942U (en) | 2019-10-14 | 2019-10-14 | Geogrid drawing test device for simulating flexible top boundary |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553919A (en) * | 2019-10-14 | 2019-12-10 | 石家庄铁道大学 | Geogrid drawing test device for simulating flexible top boundary |
| CN114689817A (en) * | 2020-12-30 | 2022-07-01 | 香港理工大学 | Testing device for testing soil settlement and consolidation in situ |
| CN116908003A (en) * | 2023-09-14 | 2023-10-20 | 四川炬原玄武岩纤维科技有限公司 | Basalt septic tank load test detection device and method |
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2019
- 2019-10-14 CN CN201921716547.6U patent/CN210893942U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553919A (en) * | 2019-10-14 | 2019-12-10 | 石家庄铁道大学 | Geogrid drawing test device for simulating flexible top boundary |
| CN110553919B (en) * | 2019-10-14 | 2024-06-04 | 石家庄铁道大学 | Geogrid drawing test device for simulating flexible top boundary |
| CN114689817A (en) * | 2020-12-30 | 2022-07-01 | 香港理工大学 | Testing device for testing soil settlement and consolidation in situ |
| CN116908003A (en) * | 2023-09-14 | 2023-10-20 | 四川炬原玄武岩纤维科技有限公司 | Basalt septic tank load test detection device and method |
| CN116908003B (en) * | 2023-09-14 | 2023-11-21 | 四川炬原玄武岩纤维科技有限公司 | Basalt septic tank load test detection device and method |
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