CN111982674B - Height-adjustable soil body uniaxial stretching device with sliding rod - Google Patents
Height-adjustable soil body uniaxial stretching device with sliding rod Download PDFInfo
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- CN111982674B CN111982674B CN202010715657.1A CN202010715657A CN111982674B CN 111982674 B CN111982674 B CN 111982674B CN 202010715657 A CN202010715657 A CN 202010715657A CN 111982674 B CN111982674 B CN 111982674B
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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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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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
- G01N3/02—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
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
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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
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
Abstract
The invention discloses a soil body uniaxial stretching device with adjustable height and a sliding rod, which comprises a bottom plate, a height-adjustable die and a uniaxial stretching device, wherein the bottom plate is provided with a sliding rod; the height-adjustable die is used for preparing a sample and can clamp two ends of the dumbbell-shaped sample; comprises a die fixing end, a die stretching end, a plurality of sliding long strips and two L-shaped bent plates; the fixed end of the mould, the stretching end of the mould and the bottom of each sliding strip are all sleeved on the sliding rods in the two sliding grooves through two sliding convex parts, and a plurality of universal balls are uniformly distributed between the sliding convex parts and the sliding rods; two L bent plates are spliced on two sides of the plurality of sliding long strips; the heights of the fixed end of the die, the stretching end of the die and the two L-shaped bent plates can be lifted; the uniaxial tension device comprises a fixing plate, a loader and a stress sensor. The invention can realize the tensile test of samples with different heights; and can avoid off-center tension, and through the slip rectangular, can reduce the friction and discern sample fracture position fast simultaneously.
Description
Technical Field
The invention relates to a geotechnical test device, in particular to a soil body uniaxial stretching device with adjustable height and a sliding rod.
Background
The soil is a weathered product of rock and has certain shear strength, compressive strength and tensile strength on the aspect of mechanical properties. However, in engineering construction, the tensile strength of soil is basically not utilized by people, so that the tensile strength of soil is mostly ignored when people study the strength of soil. However, the soil body is sometimes subjected to tensile stress in engineering, which is a problem that cannot be avoided, and the tensile stress action often occurs around tall buildings. Therefore, in recent years, the problem of tensile strength of soil bodies is more and more prominent, and people have attracted wide interest.
The test method for measuring the tensile strength of the soil body mainly comprises the following steps: uniaxial tensile test, triaxial tensile test, soil beam bending test, hollow cylinder test, radial fracturing test, Brazilian splitting test and the like. The uniaxial tensile test and the triaxial tensile test are used for measuring the tensile strength by directly applying axial tension to a sample, and belong to a direct tensile test method; a bending test, a radial fracturing test, an axial fracturing test and a hollow cylinder test of a soil beam are carried out by applying pressure or torque to a sample and calculating the tensile strength of a soil body from the pressure or the torque when the soil sample is damaged according to a certain hypothesis, and belong to an indirect tensile test method.
In the novel testing device of development such as turnui jie, put the guide rail between activity anchor clamps and experimental chassis, guarantee the tensile of sample through the slip of guide rail, have certain antifriction's effect like this, but still have the friction and exert an influence to the experiment, owing to be the effect that the guide rail plays spacing removal to activity anchor clamps, so when taking place eccentric tensile, the friction at guide rail edge can become bigger.
The stress control type horizontal uniaxial tension meter developed according to the modesty and the like has the advantages that the operation of the test method is convenient, the test result is clear, but the rotating speed is not fixed because the hand wheel is manually controlled, and the condition that whether the eccentric tension occurs in the re-tension process of the sample cannot be solved.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a height-adjustable soil body uniaxial stretching device with a sliding rod aiming at the defects of the prior art, and the height-adjustable soil body uniaxial stretching device with the sliding rod can realize the stretching tests of samples with different heights; the sample is at tensile in-process, and the slip rectangular and the tensile end of mould that are located the sample bottom slide for frictionless with the slide bar, avoid eccentric tension, and through the slip rectangular, can distinguish sample fracture position fast.
In order to solve the technical problems, the invention adopts the technical scheme that:
a height-adjustable soil body uniaxial stretching device with a sliding rod comprises a bottom plate, a height-adjustable die and a uniaxial stretching device.
The bottom plate comprises a main plate and an auxiliary plate detachably connected to the short side of the main plate. Be provided with two equal sliding tray along length direction in the mainboard, the one end and the subplate of sliding tray are linked together. A sliding rod is arranged in each sliding groove along the length direction.
The height-adjustable die is used for preparing a sample and can clamp two ends of the sample. The sample is dumbbell-shaped, has dumbbell rod portion and the dumbbell convex part of setting at dumbbell rod portion both ends.
The height-adjustable die comprises a die fixed end, a die stretching end, a plurality of sliding long strips and two L-shaped bent plates. The die fixing end and the die stretching end are both provided with trapezoid-like prism cavities which are oppositely arranged and matched with the shapes of the two dumbbell convex parts. The sliding strips are spliced between the fixed end of the die and the stretching end of the die. The mould stiff end, the tensile end of mould and every slip rectangular bottom all establish on the slide bar of two sliding tray through two slip convex parts covers, evenly has laid the universal ball of a plurality of between slip convex part and the slide bar.
Two L bent plates are spliced on two sides of the plurality of sliding strips and are positioned between the fixed end of the die and the stretching end of the die, and the two L bent plates are detachably connected with the fixed end of the die and the stretching end of the die respectively. The cavity between the two L-shaped bent plates forms the dumbbell rod part of the sample.
The height of the fixed end of the die, the stretching end of the die and the two L-shaped bent plates can be lifted.
The uniaxial tension device comprises a fixing plate, a loader and a stress sensor. The fixed plate is arranged on the auxiliary plate and connected with the fixed end of the die, the loader is arranged on the main plate and connected with the stretching end of the die through the stretching rod, and the stress sensor is arranged on the stretching rod.
The die fixing end, the die stretching end and the two L-shaped bent plates are hollow plates with hollow cavities. Each hollow cavity is internally provided with a splint with a telescopic height.
The height-adjustable die further comprises inner wall plates with different heights. The hollow plate comprises a hollow inner wall plate and a hollow outer wall plate.
The bottom of the inner wall plate is erected at the fixed end of the die, the stretching end of the die or the top of the hollow inner wall plate of the L-shaped bent plate, and the top of the inner wall plate is flush with the top of the clamping plate after the height of the inner wall plate is raised. The inner wall plate is detachably connected with the corresponding clamping plate.
The die fixed end, the die stretching end and the two L-shaped bent plates are connected with the corresponding clamping plates through vertical bolt holes and bolts.
The vertical bolt holes are formed in the die fixed end, the die stretching end and the hollow outer wall plates of the two L bent plates, and a scale is arranged on the outer side of each vertical bolt hole.
The clamping plates are provided with clamping plate holes with different heights, and the clamping plate holes are matched with the bolts.
The uniaxial stretching device further comprises a displacement sensor, and the displacement sensor is used for detecting the axial stretching displacement of the stretching end of the die.
The stress sensor and the displacement sensor are connected with the computer respectively.
The main board and the auxiliary board are connected through two fixed straight irons and screws.
The invention has the following beneficial effects:
(1) can directly use the mould of system appearance to test, through the structure of the interior wallboard of the not co-altitude size of the lift cooperation of bolt and bolt hole control splint, can carry out tensile test to the sample of co-altitude not, avoid single sample experimental, can seek the influence of sample size change to tensile test.
(2) The sample is stretched by adopting an annular universal ball structure sleeved on the rod, an annular universal ball is placed in a sliding cavity protruding at the bottom of the grinding tool, a sliding hole is formed in the sliding ball, the sliding ball is conveniently sleeved on the sliding rod to perform sliding motion, friction is reduced, and the eccentric tension of the sample is avoided.
(3) A plurality of sliding strips are arranged in parallel, the lower end of the sample fracture part is supported, the sliding rods are separated from each other along the length direction of the sliding rods, friction cannot be caused on the sample, the experiment is influenced, and the specific position of the fracture can be known.
Drawings
Fig. 1 is a schematic structural diagram of a soil body uniaxial stretching device with a sliding rod and adjustable height.
Fig. 2 shows an exploded view of the height adjustable mold of the present invention.
Fig. 3 shows a plurality of sliding strips and a schematic drawing of the sliding strips as pulled apart in the present invention.
Fig. 4 shows a front view of the slide strip of fig. 3.
Fig. 5 shows a schematic view of a base plate according to the invention.
Fig. 6 shows a schematic view of a cover plate according to the invention.
FIG. 7 shows a schematic representation of a sample according to the present invention.
Figure 8 shows a schematic diagram of the use process of the uniaxial soil body stretching device in the invention.
In fig. 8a, a state view of the die drawing end, the plurality of slide bars, the die fixing end and the slide bar combination is shown.
In fig. 8b, a schematic view of a state where an L-bend plate is added to fig. 8a is shown.
Fig. 8e is a schematic view showing a state where the height-adjustable mold with the sample is placed in the slide groove in the main plate and one end of the slide rod is connected to the main plate.
Fig. 8f shows a state in which the sub-plate is connected to the slide bar and the main plate, and the uniaxial stretching device is mounted.
In fig. 8g, a schematic view of the cover plate removed from fig. 8f is shown.
Fig. 8h is a schematic view showing a state where the screw and the bending iron are removed from the screw and the bending iron shown in fig. 8 g.
Fig. 8i is a schematic view showing a state where the L-shaped bent plate is removed from fig. 8 h.
Fig. 8j shows a schematic view of the state of the specimen at the time of stretching and breaking.
Fig. 9 shows a schematic of the die draw end height adjustment of the present invention.
In fig. 9a, a schematic view of the die before the draw end height adjustment is shown.
In fig. 9b, a schematic view of the die draw end height adjusted to a set height is shown.
In fig. 9c, a schematic view of the installation of the inner wall panel inside the clamping plate is shown.
Among them are:
1. a loader; 2. a transmitter; 3. a data line; 4. a displacement sensor; 5. A stress sensor;
6. a die drawing end; 6-1, sliding convex part; 6-2, sliding balls; 6-3, sliding holes; 6-4, stretching holes; 6-5 bolts, 6-6 clamping plates, 6-7 clamping plate holes and 6-8 inner wall plates;
7. a fixed end of the mold; 7-1, sliding convex part; 7-2, sliding balls; 7-3, sliding holes; 7-4, fixing holes;
8. l bending plate; 9. bending iron; 10. a screw;
11. sliding the strip; 11-1, a sliding projection; 11-2, sliding balls; 11-3, sliding holes;
12. a slide bar; 13. a fixing plate;
14. a base plate;
14-1, a main board; 14-2, a main board preformed hole 14-3 and an auxiliary board; 14-4, reserving holes on the auxiliary plate; 14-5, a sliding groove;
15. fixing the straight iron; 16. a cover plate; 17. and (4) sampling.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
In the description of the present invention, it is to be understood that the terms "left side", "right side", "upper part", "lower part", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and that "first", "second", etc., do not represent an important degree of the component parts, and thus are not to be construed as limiting the present invention. The specific dimensions used in the present example are only for illustrating the technical solution and do not limit the scope of protection of the present invention.
As shown in figure 1, the soil body uniaxial stretching device with the adjustable height and the sliding rod comprises a bottom plate 14, a height-adjustable die and a uniaxial stretching device.
As shown in fig. 5, the bottom plate comprises a main plate 14-1 and a secondary plate 14-3, and the main plate and the secondary plate are detachably connected through two fixed straight irons 15 and screws.
Two sliding grooves 14-5 are arranged in the main board along the length direction, and one end of each sliding groove is communicated with the auxiliary board. A sliding rod 12 is arranged in each sliding groove along the length direction, one end of each sliding rod is matched with a main board preformed hole 14-2 in each sliding groove, and the other end of each sliding rod is matched with an auxiliary board preformed hole 14-4 in each auxiliary board.
The sliding rod is preferably a hard metal rod, the surface of the sliding rod is smooth, the sliding rod is in contact with a sliding ball, and the sliding ball rolls on the sliding rod in the sliding process, so that the sliding of the die is ensured.
The height adjustable die is used for preparing the sample 17 and can clamp two ends of the sample.
As shown in fig. 7, the test piece is dumbbell-shaped, and has a dumbbell rod portion and dumbbell protrusions provided at both ends of the dumbbell rod portion.
As shown in fig. 2, the height adjustable mold includes a fixed mold end 7, a stretching mold end 6, a plurality of sliding strips 11, and two L-shaped bending plates 8.
The die fixing end and the die stretching end are both provided with trapezoid-like prism cavities which are oppositely arranged and matched with the shapes of the two dumbbell convex parts.
The sliding strips are spliced between the fixed end of the die and the stretching end of the die.
The fixed end of the mould, the stretching end of the mould and the bottom of each sliding strip are sleeved on the sliding rods 12 in the two sliding grooves through two sliding convex parts (6-1, 7-1 and 11-1), and a plurality of universal balls (6-2, 7-2 and 11-2) are uniformly distributed between the sliding convex parts and the sliding rods; the cavities in the universal ball are formed into sliding holes (6-3, 7-3 and 11-3) which are used for being sleeved on the sliding rod.
The structure and arrangement of the plurality of sliding strips are shown in fig. 3 and 4.
Two L bent plates are spliced on two sides of a plurality of sliding strips and are positioned between the fixed end of the die and the stretching end of the die, and the two L bent plates are preferably detachably connected with the fixed end of the die and the stretching end of the die through a bent iron 9 and a screw 10. The cavity between the two L-shaped bent plates forms the dumbbell rod part of the sample.
The height of the fixed end of the die, the stretching end of the die and the two L-shaped bent plates can be lifted.
The specific lifting structure is preferably arranged as follows:
as shown in fig. 9, the fixed end of the mold, the stretching end of the mold and the two L-shaped bending plates are hollow plates with hollow cavities.
Each hollow cavity is internally provided with a splint 6-6 with the height capable of stretching and contracting. The height adjustable mould also comprises inner wall plates 6-8 with different heights. The hollow plate comprises a hollow inner wall plate and a hollow outer wall plate.
The bottom of the inner wall plate is erected at the fixed end of the die, the stretching end of the die or the top of the hollow inner wall plate of the L-shaped bent plate, and the top of the inner wall plate is flush with the top of the clamping plate after the height of the inner wall plate is raised.
Splint and the die holding end, the tensile end of mould and the high fixed mode of two L bent plates, preferably: the fixed end of the die, the stretching end of the die and the two L-shaped bent plates are preferably connected with the corresponding clamping plates through vertical bolt holes 6 and bolts 6-5.
The inner wall plate is detachably connected with the corresponding clamping plate. The preferable setting mode is as follows: the clamping plates are provided with clamping plate holes 6-7 with different heights, and the clamping plate holes are matched with the bolts.
Further, vertical bolt hole sets up on the cavity outer wall board of mould stiff end, the tensile end of mould and two L bent plates, and every vertical bolt hole outside all is provided with the scale.
The uniaxial tension device comprises a fixed plate 13, a loader 1, a transmitter 2, a stress sensor 4 and a displacement sensor 5. The fixing plate is arranged on the auxiliary plate and connected with the fixed end of the die through a fixing rod and a fixing hole 7-4, the loader is arranged on the main plate and connected with the stretching end of the die through a stretching rod and a stretching hole 6-4, the stress sensor is arranged on the stretching rod, the displacement sensor is preferably arranged on the loader, the stress sensor 4 and the displacement sensor 5 are preferably connected with the transmitter 2 through a data line 3, and the transmitter is connected with the computer.
A soil body uniaxial tension test method with a height-adjustable sliding rod comprises the following steps.
Step 1, combining a height-adjustable die: the specific assembling method comprises the following steps.
The number of the sliding strips is preferably rotated according to the length of the soil sample to be simulated. The longer the length of the soil body sample to be simulated is, the more the number of the sliding strips is, so that samples with different lengths can be simulated.
The width of the L-bend plate is preferably selected based on the total axial width of all the slide bars selected.
Step 2, preparing a sample: and (3) calculating the amount of water and soil according to the required water content, slowly adding water, uniformly mixing, and fully standing to form a sample soil body. And then, filling a sample soil body into the inner cavity of the height-adjustable die combined in the step 1 in a layered tamping mode to form a dumbbell-shaped sample.
The layered tamping method is preferably as follows:
next, the sample soil after standing was divided into n parts by weight equal to each other, and numbered 1 st part, 2 nd part, … … th part, and n th part, respectively.
Sequentially filling n sample soil bodies into the dumbbell-shaped sample cavities, filling and compacting the soil body samples by adopting a layered compacting method, and assuming that the height of the required sample is H. Firstly, filling and compacting the 1 st soil body at the bottommost part of the mould, if the 1 st soil body is compacted to the height of 1/n, and filling and compacting the 2 nd soil body are carried out on the basis, the work of the compaction hammer from the upper part is acted on the 2 nd soil body when the 2 nd soil body is filled and compacted, and simultaneously, the 1 st soil body below the 2 nd soil body is further compacted, so that the compaction degree of the 1 st soil body is higher than that of the 2 nd soil body. Therefore, in practical operation, the compaction height Ha of the 1 st soil mass is required to be greater than (1/n) H, the compaction height of the 2 nd soil mass is Hb, Ha > Hb > (1/n) H, the compaction height of the third soil mass is Hc, Ha > Hb > Hc > (1/n) H, and so on, so that the compaction degree of each soil mass is finally the same, namely, although compaction is carried out in a layered mode, the compaction degree of each layer of an actual sample is the same, and the purpose of compaction in a layered mode is only to avoid the problem that the compaction degrees of the samples are different from top to bottom.
After the compaction of the 1 st soil body is completed, the scraper is used for scraping the surface of the soil body, so that the upper soil body and the 2 nd soil body can be better combined, and the rest can be analogized, and the scraping treatment is also carried out after the compaction of the 2 nd soil body.
And (3) in layered compaction, preferably covering a cover plate on the surface of the sample to be compacted to compact. And after compaction, taking down the cover plate.
Step 4, assembling a uniaxial stretching device: the die stretching end is connected with a loader arranged on the main board, and the die fixing end is connected with a fixing plate arranged on the auxiliary board. Next, the two L-bend plates are removed from the height adjustable die, so that the sample above the plurality of sliding strips forms a stretching portion. And the loader is provided with a stress sensor and a displacement sensor.
And 5, stretching, comprising the following steps:
step 51, sample clamping: and starting the loader, gradually stretching the stretching end of the die, enabling the stress sensor to monitor the stretching stress borne by the stretching end of the die in real time, enabling the displacement sensor to monitor the axial stretching displacement of the stretching end of the die in real time, and transmitting the recorded stretching stress and axial stretching displacement to the computer. In the stretching process of the mold stretching end, the sample soil body positioned in the mold fixing end and the mold stretching end forms two clamping ends due to the contraction effect of the trapezoid-like prism.
Step 52, stretching: the loader applies a load, and the tensile portion of the sample is deformed in the tensile direction in step 4. At the same time, since the slide bar is connected to the slide bar in a friction-free universal sliding manner by the slide projection located at the bottom of the slide bar and the die drawing end, the slide bar and the die drawing end slide along the slide bar together with the drawing portion of the sample. By observing the separation pitch of the slide strip, the deformation of the sample stretching portion can be determined.
And 6, breaking the sample: the loader continues to stretch the specimen and the specimen will break after the stretched portion of the specimen reaches the maximum load. And the maximum separation distance in the sliding strip is the fracture position of the sample.
And 8, in the step 2, controlling and adjusting the water content, the gravel doping amount and the compaction degree parameters in the sample to different values one by one, and repeating the steps 1 to 7 to obtain the uniaxial tensile test when different sample parameters are carried out.
Step 9, preferably, the steps 1 to 8 are repeated by adjusting the total height H of the height-adjustable die in step 13 to H1, H2 and H3, respectively, to perform uniaxial tensile tests at different specimen heights. Wherein H1 is the total height of the splint in the height-adjustable die before stretching. H2 and H3 are the total height of the splint in the height adjustable mold after stretching. H1, H2 and H3 are preferably 15cm, 20cm and 25cm, respectively.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the embodiments, and various equivalent modifications can be made within the technical spirit of the present invention, and the scope of the present invention is also within the scope of the present invention.
Claims (9)
1. The utility model provides a height-adjustable just takes soil body unipolar stretching device of slide bar which characterized in that: comprises a bottom plate, a height-adjustable die and a uniaxial stretching device;
the bottom plate comprises a main plate and an auxiliary plate detachably connected to the short side of the main plate; two sliding grooves are formed in the main plate and extend along the length direction, and one end of each sliding groove is communicated with the auxiliary plate; a sliding rod is arranged in each sliding groove along the length direction;
the height-adjustable die is used for preparing a sample and can clamp two ends of the sample; the sample is dumbbell-shaped and is provided with a dumbbell rod part and dumbbell convex parts arranged at two ends of the dumbbell rod part;
the height-adjustable die comprises a die fixed end, a die stretching end, a plurality of sliding long strips and two L-shaped bent plates; the die fixing end and the die stretching end are both provided with trapezoid-like prism cavities which are arranged oppositely and matched with the shapes of the two dumbbell convex parts; the plurality of sliding long strips are spliced between the fixed end of the die and the stretching end of the die; the fixed end of the mould, the stretching end of the mould and the bottom of each sliding strip are all sleeved on the sliding rods in the two sliding grooves through two sliding convex parts, and a plurality of universal balls are uniformly distributed between the sliding convex parts and the sliding rods;
the two L-shaped bent plates are spliced on two sides of the plurality of sliding strips and are positioned between the fixed end of the die and the stretching end of the die, and the two L-shaped bent plates are detachably connected with the fixed end of the die and the stretching end of the die respectively; a cavity between the two L-shaped bent plates forms a dumbbell rod part of the sample;
the heights of the fixed end of the die, the stretching end of the die and the two L-shaped bent plates can be lifted;
the uniaxial tension device comprises a fixed plate, a loader and a stress sensor; the fixed plate is arranged on the auxiliary plate and connected with the fixed end of the die, the loader is arranged on the main plate and connected with the stretching end of the die through the stretching rod, and the stress sensor is arranged on the stretching rod.
2. The apparatus of claim 1, wherein the height-adjustable soil uniaxial stretching device with a sliding rod is characterized in that: the fixed end of the mould, the stretching end of the mould and the two L-shaped bent plates are hollow plates with hollow cavities; each hollow cavity is internally provided with a splint with a telescopic height.
3. The apparatus of claim 2, wherein the height-adjustable soil uniaxial stretching device with a sliding rod comprises: the height-adjustable die also comprises inner wall plates with different heights; the hollow plate comprises a hollow inner wall plate and a hollow outer wall plate;
the bottom of the inner wall plate is erected at the fixed end of the die, the stretching end of the die or the top of the hollow inner wall plate of the L-shaped bent plate, and the top of the inner wall plate is flush with the top of the clamping plate after the height of the inner wall plate is raised; the inner wall plate is detachably connected with the corresponding clamping plate.
4. The apparatus of claim 2 or 3, wherein the apparatus is characterized in that: the die fixed end, the die stretching end and the two L-shaped bent plates are connected with the corresponding clamping plates through vertical bolt holes and bolts.
5. The apparatus of claim 4, wherein the height-adjustable soil uniaxial stretching device with a sliding rod is characterized in that: the vertical bolt holes are formed in the die fixed end, the die stretching end and the hollow outer wall plates of the two L bent plates, and a scale is arranged on the outer side of each vertical bolt hole.
6. The apparatus of claim 4, wherein the height-adjustable soil uniaxial stretching device with a sliding rod is characterized in that: the clamping plates are provided with clamping plate holes with different heights, and the clamping plate holes are matched with the bolts.
7. The apparatus of claim 1, wherein the height-adjustable soil uniaxial stretching device with a sliding rod is characterized in that: the uniaxial stretching device further comprises a displacement sensor, and the displacement sensor is used for detecting the axial stretching displacement of the stretching end of the die.
8. The apparatus of claim 7, wherein the apparatus is characterized by the following: the stress sensor and the displacement sensor are connected with the computer respectively.
9. The apparatus of claim 1, wherein the height-adjustable soil uniaxial stretching device with a sliding rod is characterized in that: the main board and the auxiliary board are connected through two fixed straight irons and screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113390715B (en) * | 2021-06-21 | 2022-03-18 | 水利部交通运输部国家能源局南京水利科学研究院 | Gravel-doped clay stretching device suitable for different gravel-doped particle sizes and testing method |
| CN114414397A (en) * | 2022-01-14 | 2022-04-29 | 国网内蒙古东部电力有限公司电力科学研究院 | Test box for testing low-temperature mechanical performance of splicing fitting and test method thereof |
| CN117554183B (en) * | 2024-01-09 | 2024-03-22 | 西安交通大学 | Angle-adjustable soil tensile strength test device and measuring method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0729447U (en) * | 1993-10-28 | 1995-06-02 | 川崎製鉄株式会社 | Thin plate test piece length measuring device and tensile testing device |
| CN102901669A (en) * | 2012-08-23 | 2013-01-30 | 苏州南智传感科技有限公司 | 8-analogue-shaped soil uniaxial tensile tester |
| CN103674723A (en) * | 2013-12-04 | 2014-03-26 | 西北农林科技大学 | Test method for determining uniaxial tensile strength of soil mass |
| CN206095789U (en) * | 2016-06-30 | 2017-04-12 | 江苏省地质调查研究院 | Unipolar tensile strength survey device of full -automatic horizontal soil |
| CN206583717U (en) * | 2017-04-06 | 2017-10-24 | 西北大学 | A kind of loess vibrates singles haft horizontal stretching/compressing instrument dynamometric system |
| CN108918290A (en) * | 2018-09-06 | 2018-11-30 | 中国矿业大学 | The test soil body is uniaxially stretched the device and method of rheological behavior |
| CN210071482U (en) * | 2019-03-27 | 2020-02-14 | 唐山钢铁集团有限责任公司 | Sample wire pressing ring detection centering device for uniaxial tensile test |
-
2020
- 2020-07-23 CN CN202010715657.1A patent/CN111982674B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0729447U (en) * | 1993-10-28 | 1995-06-02 | 川崎製鉄株式会社 | Thin plate test piece length measuring device and tensile testing device |
| CN102901669A (en) * | 2012-08-23 | 2013-01-30 | 苏州南智传感科技有限公司 | 8-analogue-shaped soil uniaxial tensile tester |
| CN103674723A (en) * | 2013-12-04 | 2014-03-26 | 西北农林科技大学 | Test method for determining uniaxial tensile strength of soil mass |
| CN206095789U (en) * | 2016-06-30 | 2017-04-12 | 江苏省地质调查研究院 | Unipolar tensile strength survey device of full -automatic horizontal soil |
| CN206583717U (en) * | 2017-04-06 | 2017-10-24 | 西北大学 | A kind of loess vibrates singles haft horizontal stretching/compressing instrument dynamometric system |
| CN108918290A (en) * | 2018-09-06 | 2018-11-30 | 中国矿业大学 | The test soil body is uniaxially stretched the device and method of rheological behavior |
| CN210071482U (en) * | 2019-03-27 | 2020-02-14 | 唐山钢铁集团有限责任公司 | Sample wire pressing ring detection centering device for uniaxial tensile test |
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