CN221550638U - Test piece manufacturing device for mudstone interface shear test - Google Patents
Test piece manufacturing device for mudstone interface shear test Download PDFInfo
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- CN221550638U CN221550638U CN202420091669.5U CN202420091669U CN221550638U CN 221550638 U CN221550638 U CN 221550638U CN 202420091669 U CN202420091669 U CN 202420091669U CN 221550638 U CN221550638 U CN 221550638U
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- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000010146 3D printing Methods 0.000 claims description 6
- 239000011435 rock Substances 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000002474 experimental method Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The utility model discloses a test piece manufacturing device for mudstone interface shear test, which comprises a lower die holder and an upper die holder which are mutually buckled, wherein the upper end of the lower die holder is opened to form a lower die cavity, the lower end of the upper die holder is opened to form an upper die cavity, and the bottom wall of the lower die cavity and the top wall of the upper die cavity are both provided with corresponding clamping key structures. The utility model has the following advantages and effects: by producing samples with different shapes, different interface forms are formed, and the method is beneficial to more deeply researching influence factors of a mudstone contact surface when a mudstone direct shear experiment is carried out, can better simulate complex interface conditions in a field environment, and can more comprehensively understand the mechanical properties of the rock under different contact conditions and the influence of the rock on the stability and the behavior of the rock body by simulating the different interface forms, and meanwhile, the test accuracy is improved.
Description
Technical Field
The utility model relates to the field of civil engineering, in particular to a test piece manufacturing device for a mudstone interface shear test.
Background
Loess-mudstone interface landslide is one of the most prominent landslide disasters occurring in the earth-rock contact zone in the world, and mainly occurs at the loess-mudstone interface. Because of the poor mechanical properties of mudstone, the mudstone is easily affected by water to generate mud, thereby reducing the shear strength and the weather resistance of the mudstone.
On loess mudstone interface, the mud effect forms weak intermediate layer, when the slope suffers the interference of internal and external forces such as earthquake, rainfall, storehouse water fluctuation, etc., the mudstone will slide along the cis-layer or shear joint to slide, causes the landslide.
The direct shear test is to shear the soil body by applying horizontal force, measure shear stress during damage, and calculate shear strength parameters of the soil body, namely internal friction angle and cohesive force according to coulomb law.
Direct shear tests are typically performed using solid test pieces made with a ring cutter, but such test pieces do not reflect the characteristics of interfacial shear well because different surface shapes affect shear strength, which is not considered by direct shear tests.
At present, students mostly improve the direct shear apparatus, but neglect the influence of the interface itself in shearing, so that the test result has larger deviation from the actual situation, and the direct shear apparatus needs to be improved.
Disclosure of utility model
Aiming at the defects in the prior art, the utility model aims to provide a test piece manufacturing device for a mudstone interface shear test, which has the effect of improving the test accuracy.
The technical aim of the utility model is realized by the following technical scheme: the utility model provides a mud rock interface shear test is with test piece manufacturing device, includes die holder and upper die base of mutual lock, the die holder upper end opening just forms the lower die cavity, the upper die holder lower extreme opening just forms the die cavity, lower die cavity diapire with it all is provided with corresponding key structure to go up the die cavity roof.
The present utility model may be further configured in a preferred example to: the card key structure includes a plurality of first card keys and a plurality of first card keys down, first last card key with the cross-section of card key is the rectangle setting down, and is dislocation form and lay.
The present utility model may be further configured in a preferred example to: the first upper clamping key and the first lower clamping key are distributed in a group of two narrow strips and one wide strip.
The present utility model may be further configured in a preferred example to: the card key structure includes a plurality of second upper card keys and a plurality of second lower card keys, the second upper card key with the cross-section of second lower card key is isosceles triangle setting, and is dislocation form and lays.
The present utility model may be further configured in a preferred example to: the second upper clamping key and the second lower clamping key are isosceles triangles with foot included angles of 16 degrees, and the vertical line is 2mm high.
The present utility model may be further configured in a preferred example to: the second upper clamping key and the second lower clamping key are isosceles triangles with a foot included angle of 34 degrees, and the vertical line is 4mm high.
The present utility model may be further configured in a preferred example to: the lower die holder and the upper die holder are formed by 3D printing.
The present utility model may be further configured in a preferred example to: the lower die holder and the upper die holder all comprise a base plate and a baffle ring, a pair of arc-shaped dovetail blocks are arranged on the baffle ring, and grooves for embedding the dovetail blocks and dovetail grooves which are communicated with the grooves and used for sliding and embedding the dovetail blocks are arranged on the base plate.
In summary, the utility model has the following beneficial effects:
1. Different interface forms are formed by producing samples with different shapes, so that the influence factors of the mudstone contact surface can be studied more deeply when a mudstone direct shear experiment is carried out, the complex interface condition in the field environment can be simulated better, the mechanical characteristics of the rock under different contact conditions and the influence of the rock on the stability and the behavior of the rock body can be known more comprehensively by simulating the different interface forms, and meanwhile, the test accuracy is improved;
2. The test pieces with different shapes are produced to form different interface forms, so that the real interface condition can be better simulated, the problem that the shearing strength of the direct shear device cannot be measured under different interface conditions is solved, meanwhile, the test pieces can be quickly applied to the direct shear box after demoulding, the equipment disassembling and assembling process is simple, and the device can be reprinted according to the requirements of the real interface condition, so that the test pieces can be widely popularized and used;
3. Through using 3D printing technique, convenient and fast, the material that uses is 3D and prints general material, and the layering is good, and the mould surface of printing out is smooth, prints intensity height, is difficult to fracture or warp, and heat resistance and compressive resistance are good simultaneously, can put into the oven together and dry.
Drawings
Fig. 1 is a schematic structural view of embodiment 1;
Fig. 2 is a schematic structural view of embodiment 2;
FIG. 3 is a schematic structural view of embodiment 3;
Fig. 4 is a schematic structural view of embodiment 4;
fig. 5 is a schematic structural view of embodiment 5.
Reference numerals: 1. a lower die holder; 2. an upper die holder; 3. a lower cavity; 4. an upper cavity; 5. a key structure; 51. a first upper clamping key; 52. a first lower snap key; 53. a second upper clamping key; 54. a second lower clamping key; 6. a seat plate; 61. a groove; 62. a dovetail groove; 7. a baffle ring; 71. dovetail block.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings.
Example 1:
As shown in fig. 1, a test piece manufacturing device for mudstone interface shear test comprises a lower die holder 1 and an upper die holder 2 which are mutually buckled, wherein the upper end of the lower die holder 1 is opened to form a lower die cavity 3, the lower end of the upper die holder 2 is opened to form an upper die cavity 4. The bottom wall of the lower cavity 3 and the top wall of the upper cavity 4 are respectively provided with a corresponding clamping key structure 5 for producing and processing samples with different shapes to form different interface forms.
As shown in FIG. 1, the dimensions of the lower die holder 1 and the upper die holder 2 are matched with the inner diameter of the ring cutter, and the heights of the lower die holder 1 and the upper die holder 2 are half of the height of the ring cutter, so that the produced test piece can be directly and rapidly applied to a direct shear box, the equipment disassembling and assembling process is simple, and the device can be reprinted according to the requirements of the actual interface condition, and the device can be widely popularized and used.
When the test piece is processed, the lower die holder 1 is firstly placed on a tabletop, a remolded sample is prepared, 2/3 of the remolded sample is placed in the lower die cavity 3, then the remolded sample is compacted for 6-10 times at a constant speed by using a hammer with the diameter of 61.8mm, then the rest 1/3 of the remolded sample is placed in the lower die cavity 3, the remolded sample is compacted for 6-10 times at a constant speed by using the hammer, and then the remolded sample is smoothed by using a scraper, so that one half of the test piece is produced.
Then the upper die holder 2 is placed on the tabletop, and the steps are repeated to produce the other half of the test piece. And then the lower die holder 1 and the upper die holder 2 are put into an oven for drying, and then the remolded sample is taken out after demoulding. And finally, aligning one surface of the remolded sample with the shape, realizing clamping and splicing, enabling the outer edges to be flush, and realizing the assembly of the test piece so as to perform a direct shear test.
Therefore, by producing samples with different shapes, different interface forms are formed, and the method is beneficial to more deeply researching influence factors of a mudstone contact surface when a mudstone direct shear experiment is carried out, can better simulate complex interface conditions in a field environment, can more comprehensively understand the mechanical properties of the rock under different contact conditions and the influence of the rock on the stability and the behavior of the rock body by simulating the different interface forms, and improves the test accuracy.
As shown in FIG. 1, the lower die holder 1 and the upper die holder 2 are formed by 3D printing, the 3D printing technology is used, the material is a 3D printing universal material, the layering effect is good, the printed die surface is smooth, the printing strength is high, the die is not easy to break or deform, meanwhile, the heat resistance and the compression resistance are good, and the die can be put into an oven together for drying.
Example 2:
as shown in fig. 2, the card key structure 5 includes a plurality of first upper card keys 51 and a plurality of first lower card keys 52, and the cross sections of the first upper card keys 51 and the first lower card keys 52 are rectangular and arranged in a staggered manner.
As shown in fig. 2, the first upper snap key 51 and the first lower snap key 52 are arranged in a group of two narrow strips and one wide strip, the width of the narrow strips is 3.6mm, and the width of the wide strips is 7.2mm.
The shape and the structural design are used for better simulating that the rock possibly folds and breaks in the crust movement to form a gear-shaped structure. These structures are typically associated with structural movement and crust deformation, which reflect the effects of forces such as pressure, tension and shear in the geological history.
Example 3:
As shown in fig. 3, the card key structure 5 includes a plurality of second upper card keys 53 and a plurality of second lower card keys 54, and the cross sections of the second upper card keys 53 and the second lower card keys 54 are arranged in an isosceles triangle shape and are arranged in a staggered manner.
As shown in fig. 3, the second upper catch 53 and the second lower catch 54 are isosceles triangles with a foot included angle of 16 ° and the vertical line is 2mm high.
The shape and structure are designed to better simulate a common brittle interface state of the rock, and the shape and structure are shown as saw tooth shapes presented by the surface of the rock, which are caused by the fact that the rock breaks along different directions under the stress. The rock can be simulated to be impacted or degraded in the processes of earthquake, rainfall, glacier, weathering and the like.
Example 4:
As shown in fig. 4, the card key structure 5 includes a plurality of second upper card keys 53 and a plurality of second lower card keys 54, and the cross sections of the second upper card keys 53 and the second lower card keys 54 are arranged in an isosceles triangle shape and are arranged in a staggered manner.
As shown in fig. 4, the second upper catch 53 and the second lower catch 54 are isosceles triangles with a foot included angle of 34 ° and the vertical line is 4mm high.
The shape and structure design is designed to better simulate the irregular, jagged boundaries between two phases in rock. Such boundaries may increase the strength and toughness of the rock, while also promoting plastic deformation and stress relaxation of the rock. When the rock is acted by external force, the processes of phase change, diffusion, sliding, dislocation and the like can occur among different phases, so that deep saw-tooth boundaries are formed.
Example 5:
As shown in fig. 5, the lower die holder 1 and the upper die holder 2 each include a seat plate 6 and a retainer ring 7, a pair of circular arc-shaped dovetail blocks 71 are provided on the retainer ring 7, and a groove 61 in which the dovetail blocks 71 are embedded and a dovetail groove 62 which communicates with the groove 61 and in which the dovetail blocks 71 are slidably embedded are provided on the seat plate 6.
Therefore, when demoulding, the seat plate 6 and the baffle ring 7 can be rotated relatively, so that the dovetail block 71 slides into the dovetail groove 62, the disassembly of the seat plate 6 and the baffle ring 7 is realized, and the complete demoulding of the sample is facilitated. When the device is used, the dovetail block 71 is embedded into the groove 61, then the seat plate 6 and the baffle ring 7 are rotated, the dovetail block 71 slides into the dovetail groove 62, the seat plate 6 and the baffle ring 7 are rapidly assembled, and the sample is conveniently produced and processed.
The present utility model is not limited by the specific embodiments, and modifications can be made to the embodiments without creative contribution by those skilled in the art after reading the present specification, but are protected by patent laws within the scope of claims of the present utility model.
Claims (8)
1. Test piece manufacturing device for mudstone interface shear test, its characterized in that: the novel die comprises a lower die holder (1) and an upper die holder (2) which are buckled with each other, wherein the upper end of the lower die holder (1) is opened to form a lower die cavity (3), the lower end of the upper die holder (2) is opened to form an upper die cavity (4), and the bottom wall of the lower die cavity (3) and the top wall of the upper die cavity (4) are respectively provided with a corresponding clamping key structure (5).
2. The test piece manufacturing device for mudstone interface shear test according to claim 1, wherein: the clamping key structure (5) comprises a plurality of first upper clamping keys (51) and a plurality of first lower clamping keys (52), wherein the sections of the first upper clamping keys (51) and the first lower clamping keys (52) are arranged in a rectangular mode and are arranged in a staggered mode.
3. The test piece manufacturing device for mudstone interface shear test according to claim 2, wherein: the first upper clamping key (51) and the first lower clamping key (52) are distributed in a group of two narrow strips and one wide strip.
4. The test piece manufacturing device for mudstone interface shear test according to claim 1, wherein: the clamping key structure (5) comprises a plurality of second upper clamping keys (53) and a plurality of second lower clamping keys (54), and the sections of the second upper clamping keys (53) and the second lower clamping keys (54) are arranged in an isosceles triangle shape and are arranged in a dislocation mode.
5. The test piece manufacturing device for mudstone interface shear test according to claim 4, wherein: the second upper clamping key (53) and the second lower clamping key (54) are isosceles triangles with a foot included angle of 16 degrees, and the vertical line is 2mm high.
6. The test piece manufacturing device for mudstone interface shear test according to claim 4, wherein: the second upper clamping key (53) and the second lower clamping key (54) are isosceles triangles with a foot included angle of 34 degrees, and the vertical line is 4mm high.
7. The test piece manufacturing device for mudstone interface shear test according to claim 1, wherein: the lower die holder (1) and the upper die holder (2) are formed by 3D printing.
8. The test piece manufacturing device for mudstone interface shear test according to claim 1, wherein: the die comprises a die holder (1) and an upper die holder (2), wherein the die holder (1) and the upper die holder (2) comprise a base plate (6) and a baffle ring (7), a pair of circular arc-shaped dovetail blocks (71) are arranged on the baffle ring (7), and grooves (61) for embedding the dovetail blocks (71) and dovetail grooves (62) which are communicated with the grooves (61) and used for enabling the dovetail blocks (71) to slide and embed are arranged on the base plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420091669.5U CN221550638U (en) | 2024-01-15 | 2024-01-15 | Test piece manufacturing device for mudstone interface shear test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420091669.5U CN221550638U (en) | 2024-01-15 | 2024-01-15 | Test piece manufacturing device for mudstone interface shear test |
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| Publication Number | Publication Date |
|---|---|
| CN221550638U true CN221550638U (en) | 2024-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420091669.5U Active CN221550638U (en) | 2024-01-15 | 2024-01-15 | Test piece manufacturing device for mudstone interface shear test |
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| Country | Link |
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| CN (1) | CN221550638U (en) |
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- 2024-01-15 CN CN202420091669.5U patent/CN221550638U/en active Active
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