CN211697305U - But angle regulation's geomembrane shear test device - Google Patents
But angle regulation's geomembrane shear test device Download PDFInfo
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- CN211697305U CN211697305U CN202020226407.7U CN202020226407U CN211697305U CN 211697305 U CN211697305 U CN 211697305U CN 202020226407 U CN202020226407 U CN 202020226407U CN 211697305 U CN211697305 U CN 211697305U
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Abstract
The utility model discloses an angle-adjustable geomembrane shearing test device, which comprises a rectangular rigid groove, wherein the rigid plate and a groove bottom plate can form an included angle less than 90 degrees; the two ends of the upper shearing box are respectively connected with a telescopic rigid connecting rod, the telescopic rigid connecting rods at the two ends are respectively fixedly connected with a counter-force rod, the two ends of the counter-force rod are respectively positioned on two opposite side walls of the rigid groove, two circular arc-shaped tracks are respectively arranged on the two opposite side walls, the two ends of the counter-force rod are respectively arranged in the two circular arc-shaped tracks which are oppositely arranged, and when the rigid plate rotates relative to the groove bottom plate, the two ends of the counter-force rod slide along the circular arc-shaped tracks. The utility model can simulate and test the geomembrane contact surface mechanical index and the change rule thereof under different slopes; the water-stop sheet is arranged in the upper shearing box, water is added into the rigid groove, water pressure is applied to the soil sample in the upper shearing box, the compression mode of the geomembrane in a real environment is simulated, and the compression mode of the geomembrane in the actual environment is simulated more truly.
Description
Technical Field
The utility model relates to a geomembrane technical field specifically is an angle-adjustable's shear test device for geomembrane.
Background
Geomembranes are a new type of impermeable material and are widely applied to impermeable projects such as dams, storage trays, refuse landfills and the like. In order to simulate the stress environment of the geomembrane in the actual operation process and obtain the mechanical characteristics of the geomembrane, a series of indoor mechanical tests such as a geomembrane shear test are often performed on the geomembrane. In geomembrane shear testing, a geomembrane shear testing apparatus is required.
In the prior art, the shear property of the contact surface of the geomembrane and the soil and stone materials is usually tested through a geomembrane direct shear test. However, the existing direct shear test instruments shear from the horizontal direction, influence of the dam gradient on the shearing characteristic of the geomembrane is not considered, and mechanical indexes and change rules of the contact surface of the geomembrane under different gradients cannot be tested. Therefore, there is a need to develop an angle adjustable geomembrane shear test device.
SUMMERY OF THE UTILITY MODEL
Not enough to the above that prior art exists, the utility model aims to provide an angle-adjustable's geomembrane shear test device, geomembrane contact surface mechanics index and change law under the different slopes of simulation test.
In order to solve the above problem, the utility model discloses a following technical scheme realizes:
an angle-adjustable geomembrane shear test device comprises a rectangular rigid groove, wherein a rigid plate is arranged in the groove, one end of the rigid plate is hinged with a groove bottom plate, and the rigid plate and the groove bottom plate can form an included angle smaller than 90 degrees;
the rigid plate is sequentially provided with a lower shearing box and an upper shearing box from bottom to top, two ends of the shearing direction of the upper shearing box are respectively connected with a telescopic rigid connecting rod, the telescopic rigid connecting rods at the two ends are respectively fixedly connected with a counter-force rod, the telescopic rigid connecting rods are parallel to the rigid plate, the counter-force rods are perpendicular to the shearing direction, two ends of each counter-force rod are respectively positioned on two opposite side walls of the corresponding rigid groove, two circular arc-shaped tracks are respectively arranged on the two opposite side walls, the circular arc-shaped tracks on each side wall are respectively positioned on two sides of the upper shearing box, two ends of the counter-force rods on two sides of the upper shearing box are respectively arranged in the two circular arc-shaped tracks, the circle center of each circular arc-shaped track is a hinged joint of the rigid plate and the groove bottom plate, and when the.
Preferably, the hinge structure of the slot bottom plate and the rigid plate is as follows: the groove bottom plate is provided with two triangular vertical plates oppositely, the vertical plates are provided with through holes, one end of each rigid plate is provided with a pin joint head, the pin joint heads are provided with through holes, the pin joint heads are arranged between the two vertical plates, a rotating shaft penetrates through the through holes of the pin joint heads of the triangular vertical plates and the rigid plates, and one end of each rigid plate is rotatably and hingedly connected onto the groove bottom plate.
Preferably, a telescopic rod is arranged between the rigid plate and the groove bottom plate, and two ends of the telescopic rod are respectively connected to the rigid plate and the groove bottom plate through single hinges. Through the telescopic link, adjust the contained angle of rigid plate and groove bottom plate, make the dam slope that reaches the experimental requirement, fix the geomembrane on shearing box surface down through the geomembrane anchor clamps, simulate the laying and the actual stress environment of dam side slope geomembrane.
Preferably, the upper shear box is filled with a soil sample, and a water-stop sheet is arranged on the surface of the soil sample of the upper shear box.
Preferably, in order to more simulate the compressive manner of a real-world geomembrane. The rigid groove is also provided with a water tank outside, and water in the water tank is injected into the rigid groove through a water pipe. The water-stop sheet arranged on the surface of the soil sample of the upper shear box is completely contacted with water, and the water pressure acts on the water-stop sheet and the soil sample in the upper shear box, so that the compression mode of the geomembrane in a real environment can be simulated. Or the normal loading device can apply pressure to the soil sample in the upper shear box without discharging water into the rigid groove.
Preferably, the two ends of the upper shearing box are connected with the baffle plates through lateral rollers, and the baffle plates at the two ends are respectively connected with the reaction rod through telescopic rigid connecting rods. The upper shear box is made freely movable in the lateral direction, but movement in the shear direction is limited.
Preferably, one side of the lower shearing box is connected with a shearing transmission device for applying a shearing direction load, the shearing transmission device is connected with a shearing load sensor, the lower shearing box is also connected with a shearing direction displacement sensor, the shearing load sensor and the shearing direction displacement sensor are respectively connected with the data acquisition unit through data lines, and the data acquisition unit is electrically connected with the computer.
Preferably, the geomembrane is fixed on the surface of the lower shearing box by using a geomembrane clamp and an anchoring bolt, the plane size of the upper shearing box is smaller than that of the geomembrane, a sliding rail in the shearing direction is arranged between the upper shearing box and the geomembrane clamp, the sliding rail can reduce the friction force between the lower shearing box and the rigid bottom plate, and the test error caused by the friction between the rigid bottom plate and the lower shearing box is prevented.
Compared with the prior art, the utility model, following beneficial effect has:
the utility model can change the length of the telescopic rod between the rigid plate and the tank bottom plate, can carry out geomembrane shearing experiments at different angles, and simulate and test the geomembrane contact surface mechanical index and the change rule thereof at different gradients; through establishing a water-stop sheet in last shear box, add water in the rigidity inslot, the water-stop sheet prevents on the one hand that soil sample and water in the box of shearing from contacting, and on the other hand and rigidity inslot water contact exert water pressure to soil sample in the box of shearing, simulate the pressurized mode of geomembrane under the real environment, angle regulation's design and the design of water-stop sheet in the box of shearing all are the pressurized mode of geomembrane in the actual environment simulated more really.
Drawings
Fig. 1 is a front view of the angle-adjustable geomembrane shear test device of the present invention;
FIG. 2 is a top view of the rectangular rigid slot of the present invention;
FIG. 3 is a front view of the middle shear box of the present invention;
FIG. 4 is a top view of the shear box of the present invention taken perpendicular to the rigid plate;
fig. 5 is a right side half-sectional view of the middle shear box of the present invention parallel to the rigid plate.
Reference numerals: 1. rigid groove, 2, groove bottom plate, 3, telescopic rod, 4, rigid plate, 5, lower shearing box, 6, upper shearing box, 7, water stop plate, 8, lateral roller, 9, baffle plate, 10, circular arc track A, 11, circular arc track B, 12, reaction rod A, 13, reaction rod B, 14, telescopic rigid connecting rod A, 15, telescopic rigid connecting rod B, 16, shearing load sensor, 17, shearing transmission device, 18, shearing direction displacement sensor, 19, water tank, 20, water pipe, 21, data collector, 22, computer, 23, triangular vertical plate, 24, computer, 25, slide rail, 26, anchor bolt, 27 and geomembrane clamp.
Detailed Description
As shown in fig. 1, an angle-adjustable geomembrane shear test device comprises a rectangular rigid groove 1, a rigid plate 4 with an adjustable angle is arranged on a groove bottom plate 2, a lower shear box 5 and an upper shear box 6 are sequentially arranged on the rigid plate from bottom to top, one end of the upper shear box in the shearing direction is connected with a telescopic rigid connecting rod a14, the other end is connected with a telescopic rigid connecting rod B15, the telescopic rigid connecting rod a is fixedly connected with a reaction rod a12, the telescopic rigid connecting rod B is fixedly connected with a reaction rod B13, the telescopic rigid connecting rod is parallel to the rigid plate, the reaction rod is perpendicular to the shearing direction, two ends of the reaction rod are respectively positioned on two opposite side walls of the rigid groove, an arc-shaped track a10 and an arc-shaped track B11 are respectively arranged on the two opposite side walls, the arc-shaped track a10 and the arc-shaped track B11 on each side wall are respectively positioned on two, two ends of the reaction rod A12 are arranged in two arc-shaped tracks A10 which are oppositely arranged, two ends of the reaction rod B13 are arranged in two arc-shaped tracks B11 which are oppositely arranged, the circle center of each arc-shaped track is a hinge point of the rigid plate and the groove bottom plate, and when the rigid plate rotates relative to the groove bottom plate, the two ends of the reaction rod slide along the arc-shaped tracks.
The two ends of the upper shearing box in the shearing direction are constrained on the counter-force rod, the upper shearing box is filled with soil samples, and the geomembrane is laid on the surface of the lower shearing box and is fixed by a geomembrane clamp 27; go up to cut the box soil sample surface and place water-stop sheet 7, after pouring water in the rigid groove, water-stop sheet and inslot water contact, water pressure acts on the soil sample in water-stop sheet and the last shear box, one side of lower shear box is connected and is applyed the shearing transmission 17 of shearing direction load, shear load sensor 16 links to each other with shearing transmission 17, this side of lower shear box still is connected with shearing direction displacement sensor 18, shear load sensor is used for the record to apply the shearing force on the lower shear box, shear direction displacement sensor records the shear displacement of lower shear box.
The shearing load sensor and the shearing direction displacement sensor are respectively connected with the data acquisition unit through data lines, and the data acquisition unit 21 is electrically connected with the computer 22.
The shearing transmission device and the sliding rail are the prior art, and any structure capable of realizing the movement of the lower shearing box on the rigid plate can be adopted in the prior art, so that the details are not repeated.
As shown in fig. 1 and 3, the upper shear box 6 is connected to the baffle 9 through the lateral rollers 8 at both ends in the shearing direction, the baffle 9 is connected to the telescopic rigid connecting rod A, B, the telescopic rigid connecting rod is rigidly connected to the reaction rod A, B, the distance from the reaction rod to the lower shear box 5 is equal to the distance from the middle point of the baffle to the lower shear box, and the upper shear box cannot move in the shearing direction.
As shown in fig. 4, the plane size of the upper shear box is smaller than that of the geomembrane, the geomembrane is fixed on the surface of the lower shear box by using a geomembrane clamp 27 and an anchor bolt 26, a slide rail is arranged between the upper shear box and the geomembrane clamp, and the upper shear box can freely move in the vertical direction and the shearing direction but limits the movement in the shearing direction.
As shown in fig. 3 and 4, a slide rail 25 is also provided between the lower shear box and the rigid plate.
The use method of the angle-adjustable geomembrane shear test device is described below by taking a geomembrane shear test as an example, and the method comprises the following steps:
a) the rigid plate is fixed to an angle required to be researched by adjusting the length of the telescopic rod 3;
b) laying the cut geomembrane on the lower shearing box, and fixing the periphery of the geomembrane by using the geomembrane clamp;
c) assembling the upper shearing box and the lower shearing box, restraining two ends of the upper shearing box in the shearing direction on the counter-force rod, then loading the soil sample into the upper shearing box, compacting to a designed compactness, and enabling the soil sample to be in close contact with the geomembrane;
d) placing the water-stop sheet on the top of the soil sample of the upper shearing box, sequentially installing the shearing transmission device, the shearing load sensor and the shearing direction displacement sensor, connecting the shearing load sensor and the shearing direction displacement sensor with the data acquisition unit through data lines, adding water into the tank through a water pipe and a water tank, enabling the water level in the tank to reach the water level required by the test, operating the data acquisition unit, and checking whether each part is in a normal working state;
e) according to the test requirements, a shearing transmission device is used for applying shearing load, the change of shearing stress and shearing displacement along with time in the test process is collected and recorded in real time through a data collector and a computer in the shearing process, and when the shearing displacement reaches the maximum shearing displacement, the shearing is stopped.
f) After the test is finished, discharging water in the groove, taking out the water-stop sheet, cleaning up the test soil, returning the lower shearing box to the original position, unscrewing the screws on the clamping plates, taking out the tested geomembrane, replacing a new geomembrane, and adjusting the required angle to perform the next test.
What is not specifically described in the present invention is the prior art or can be realized by the prior art. The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides an angle adjustable's geomembrane shear test device which characterized in that: the device comprises a rectangular rigid groove, wherein a rigid plate is arranged in the groove, one end of the rigid plate is hinged with a groove bottom plate, and the rigid plate and the groove bottom plate can form an included angle smaller than 90 degrees;
the rigid plate is sequentially provided with a lower shearing box and an upper shearing box from bottom to top, two ends of the shearing direction of the upper shearing box are respectively connected with a telescopic rigid connecting rod, the telescopic rigid connecting rods at the two ends are respectively fixedly connected with a counter-force rod, the telescopic rigid connecting rods are parallel to the rigid plate, the counter-force rods are perpendicular to the shearing direction, two ends of each counter-force rod are respectively positioned on two opposite side walls of the corresponding rigid groove, two circular arc-shaped tracks are respectively arranged on the two opposite side walls, the circular arc-shaped tracks on each side wall are respectively positioned on two sides of the upper shearing box, two ends of the counter-force rods on two sides of the upper shearing box are respectively arranged in the two circular arc-shaped tracks, the circle center of each circular arc-shaped track is a hinged joint of the rigid plate and the groove bottom plate, and when the.
2. The adjustable angle geomembrane shear test device according to claim 1, wherein: a telescopic rod is arranged between the rigid plate and the groove bottom plate, and two ends of the telescopic rod are respectively connected to the rigid plate and the groove bottom plate through single hinges.
3. The adjustable angle geomembrane shear test device according to claim 1, wherein: the upper shearing box is filled with a soil sample, and the surface of the soil sample of the upper shearing box is provided with a water-stop sheet.
4. The adjustable angle geomembrane shear test device according to claim 3, wherein: the rigid groove is also provided with a water tank outside, and water in the water tank is injected into the rigid groove through a water pipe.
5. The adjustable angle geomembrane shear test device according to claim 1, wherein: the groove bottom plate is provided with two triangular vertical plates oppositely, the vertical plates are provided with through holes, one end of each rigid plate is provided with a pin joint head, the pin joint heads are provided with through holes, the pin joint heads are arranged between the two vertical plates, a rotating shaft penetrates through the through holes of the pin joint heads of the triangular vertical plates and the rigid plates, and one end of each rigid plate is rotatably and hingedly connected onto the groove bottom plate.
6. The adjustable angle geomembrane shear test device according to claim 1, wherein: the two ends of the upper shearing box are connected with the baffle plates through lateral idler wheels, and the baffle plates at the two ends are respectively connected with the counter-force rod through telescopic rigid connecting rods.
7. The adjustable angle geomembrane shear test device according to claim 1, wherein: one side of the lower shearing box is connected with a shearing transmission device for applying shearing direction load, a shearing load sensor is connected onto the shearing transmission device, a shearing direction displacement sensor is further connected onto the lower shearing box, the shearing load sensor and the shearing direction displacement sensor are respectively connected with a data acquisition unit through data lines, and the data acquisition unit is electrically connected with a computer.
8. The adjustable angle geomembrane shear test device according to claim 1, wherein: the geomembrane is fixed on the surface of the lower shearing box by using a geomembrane clamp and an anchoring bolt, the plane size of the upper shearing box is smaller than that of the geomembrane, and a sliding rail along the shearing direction is arranged between the upper shearing box and the geomembrane clamp.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020226407.7U CN211697305U (en) | 2020-02-28 | 2020-02-28 | But angle regulation's geomembrane shear test device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112748023A (en) * | 2020-12-29 | 2021-05-04 | 广西科技大学 | Geosynthetic material temperature control oblique shear test device and test method |
| CN112964574A (en) * | 2021-02-08 | 2021-06-15 | 四川大学 | Cylindrical core direct shear testing machine |
| CN113295554A (en) * | 2021-05-11 | 2021-08-24 | 合肥泛远检测仪器有限公司 | Geotechnical cloth creep simulation detection device for laboratory |
-
2020
- 2020-02-28 CN CN202020226407.7U patent/CN211697305U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112748023A (en) * | 2020-12-29 | 2021-05-04 | 广西科技大学 | Geosynthetic material temperature control oblique shear test device and test method |
| CN112748023B (en) * | 2020-12-29 | 2023-10-31 | 广西科技大学 | Geosynthetic material temperature control oblique shear test device and test method |
| CN112964574A (en) * | 2021-02-08 | 2021-06-15 | 四川大学 | Cylindrical core direct shear testing machine |
| CN113295554A (en) * | 2021-05-11 | 2021-08-24 | 合肥泛远检测仪器有限公司 | Geotechnical cloth creep simulation detection device for laboratory |
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Granted publication date: 20201016 Termination date: 20210228 |