CN213148606U - Bearing capacity performance testing device for high-viscosity fluid - Google Patents
Bearing capacity performance testing device for high-viscosity fluid Download PDFInfo
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- CN213148606U CN213148606U CN202022469721.0U CN202022469721U CN213148606U CN 213148606 U CN213148606 U CN 213148606U CN 202022469721 U CN202022469721 U CN 202022469721U CN 213148606 U CN213148606 U CN 213148606U
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- bearing capacity
- viscosity fluid
- loading
- loading box
- ruler
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- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 239000012530 fluid Substances 0.000 title claims abstract description 20
- 238000004062 sedimentation Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 229910000278 bentonite Inorganic materials 0.000 abstract description 19
- 239000000440 bentonite Substances 0.000 abstract description 19
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 abstract description 19
- 239000002002 slurry Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004364 calculation method Methods 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000002474 experimental method Methods 0.000 description 6
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000002023 wood Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000001054 red pigment Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a bearing capacity performance testing device of high viscosity fluid, which comprises a container for containing a high viscosity fluid sample, a transparent cylindrical loading box arranged on the high viscosity fluid, and a plurality of disc-shaped steel weights loaded in the loading box in sequence; the sedimentation value reading ruler is vertical to the edge of the container, the horizontal ruler is arranged at the top of the loading box, and one end of the horizontal ruler is close to the sedimentation value reading ruler. Adopt the utility model provides a measuring device through the settlement condition of bentonite mud under the not equidimension loading effect, judges its limit bearing capacity. During the test, the settlement value of the bentonite slurry is read in a step-by-step loading mode, and the p-s curve and the ultimate bearing capacity value of the bentonite slurry are obtained through calculation. The utility model provides a test device simple structure, the preparation is with low costs, and the operation is directly perceived, and has avoided the loading thing that probably appears in the loading process to be absorbed in the condition in the mud, makes the experimental result more accurate, has reference value and practical value to actual engineering.
Description
Technical Field
The utility model relates to a testing arrangement to the fluidic bearing capacity performance of high viscosity, the bearing capacity capability test device of bentonite mud during in particular to tunnel construction.
Background
At present, with the gradual increase of the construction requirements of tunnels such as subways in China, the construction technology of underground spaces is rapidly developed, but due to the complexity and the changeability of geological conditions and the limitation of industrial technology, a plurality of risks exist, and the requirements on the technology, materials and the like are high.
The use of bentonite slurry is an important link in the tunnel construction process, and the strength of the bentonite slurry needs to be determined before the bentonite slurry is used. However, the existing general method for testing strength is not well applicable to fluid with higher viscosity, and has less tests on the bearing capacity of the mud body and rougher test results. Therefore, it is desirable to provide a method for testing the bearing capacity of high viscosity fluids (such as bentonite mud) to solve such problems and improve the accuracy of the bearing capacity test for such materials.
Disclosure of Invention
The utility model discloses not enough to prior art exists, for the bearing capacity characteristic of research bentonite mud under the load effect, measure the bearing capacity performance of high viscosity fluid bentonite mud more accurately, provide a simple structure, with low costs to be applicable to the experimental apparatus of the great fluidic bearing capacity capability test of viscosity.
The technical scheme for realizing the purpose of the utility model is to provide a bearing capacity performance testing device of high-viscosity fluid, which comprises a container for containing a high-viscosity fluid sample, a transparent cylindrical loading box is arranged on the high-viscosity fluid, and a plurality of disc-shaped steel weights are sequentially loaded in the loading box; the sedimentation value reading ruler is vertical to the edge of the container, the horizontal ruler is arranged at the top of the loading box, and one end of the horizontal ruler is close to the sedimentation value reading ruler.
The utility model discloses a preferred technical scheme is: and scales are marked on the side wall of the sample container. The level ruler adopts a right-angle set square, and two right-angle sides respectively abut against the top of the loading box and the sedimentation value reading ruler.
Adopt the utility model provides a measuring device through the settlement condition of bentonite mud under the not equidimension loading effect, judges its limit bearing capacity. During the test, the settlement value of the bentonite slurry is read in a step-by-step loading mode, and the p-s curve and the ultimate bearing capacity value of the bentonite slurry are obtained through calculation.
The utility model has the advantages that: the used test tools such as the loading box and the like are convenient to prepare and low in cost; the test device has the advantages of simple structure and intuitive operation, avoids the situation that the loaded objects possibly appear in the slurry in the loading process, ensures that the test result is more accurate, and has more reference value and practical value for the actual engineering.
Drawings
Fig. 1 is a schematic structural diagram of a testing apparatus provided in an embodiment of the present invention;
fig. 2 is a result diagram of the test device provided by the embodiment of the present invention for testing the ultimate bearing capacity of the sample.
In the figure, 1. sample; 2. loading a box; 3. a weight; 4. a sedimentation value reading ruler; 5. a right-angle set square; 6. a sample container.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.
Example 1
Referring to fig. 1, which is a schematic structural diagram of a device for testing bearing capacity performance of a high viscosity fluid (bentonite slurry) provided in this embodiment, a high viscosity fluid sample 1 to be tested is contained in a sample container 6, and for convenience of observing an experimental process, the sample container 6 is a transparent cylinder, and scales are marked on a side wall thereof. A transparent cylindrical loading box 2 is arranged on a high-viscosity fluid sample 1, and a plurality of disc-shaped steel weights 3 are sequentially loaded in the loading box 2; the sedimentation value reading ruler 4 is vertical to the side of the container 1, one right-angle side of the right-angle triangular plate 5 is arranged at the top of the loading box, and the other right-angle side of the right-angle triangular plate is close to the sedimentation value reading ruler. The right-angle set square plays the effect of simple and easy level bar in this embodiment for whether loading box 2 is in the horizontality when detecting the measurement reading, with the accuracy of guaranteeing the reading.
Adopt the testing arrangement that this embodiment provided, test the bearing capacity performance of high viscosity fluid (bentonite mud), the experimental selection uses the container: a cylinder with a diameter of 10cm and a height of 16 cm; loading a box: diameter 3cm, cylinder, own weight 30 g; each stage is loaded with 50 g.
The viscosity of the slurry was measured at 230000 MPa · s (measured with a rotational viscometer model NDJ-79).
The test method comprises the following steps:
1. before the test, the side wall of the container is marked with scales by short lines, so that the deformation change can be observed conveniently.
2. Sampling, paving bentonite slurry in the container, and paving by using a layered paving method in the paving process, wherein 50mm is taken as a layer of thickness, and the height is 200mm in a layered paving manner. After each layer of mud reaches 50mm of scale marks (the mass of each layer of bentonite mud is the same, the bentonite mud is weighed by an electronic scale), the wood plate is leveled by the prepared wood plate before the experiment and the fixed hammering number is applied to the wood plate, after each layer of paving and leveling, a horizontal red sand (obtained by soaking a sand sample with red pigment before the experiment) strip is uniformly scattered along the surface close to the glass, and the deformation change of the bentonite mud is roughly analyzed by checking the displacement change process of the red sand strip in the experiment process.
3. A loading box (transparent cylindrical container) was placed, weights were placed on the loading box, and the test was started and data was recorded. Add the disc steel weight that weight is 50g one by one and carry out the loading step by step, after every grade of loading, wait to subside the stable back of condition, record weight and the settlement volume that records under the corresponding condition, read the value of subsiding through the vertical removal set square.
4. Calculating and recording the weight of the loading box and the weight and the contact area of the loading box and the sample (namely the bottom area of the loading box), wherein the ratio of the weight to the bottom area of the loading box to the sample is the load value (the weight is the weight of the weight and the contact area of the loading box and the sample is the weight of the weight and the contact area
F is the total weight and a is the contact area) and a p-s curve is drawn according to the corresponding sedimentation value.
5. And when the sedimentation is sharply increased and the p-s curve has an inflection point phenomenon, terminating the loading, and taking a load value corresponding to the inflection point as the limit bearing capacity.
6. After the set of experiments was completed, the above experimental steps were repeated for the next set of experiments.
See FIG. 2, which is a graph of the sedimentation pattern obtained in the experiment of this example. As can be seen from FIG. 2, when the load at the inflection point position was 1.4 kPa, the measured ultimate bearing capacity was 1.4 kPa.
Claims (3)
1. The utility model provides a bearing capacity capability test device of high viscosity fluid which characterized in that: the device comprises a container for containing a high-viscosity fluid sample, a transparent cylindrical loading box arranged on the high-viscosity fluid, and a plurality of disc-shaped steel weights sequentially loaded in the loading box; the sedimentation value reading ruler is vertical to the edge of the container, the horizontal ruler is arranged at the top of the loading box, and one end of the horizontal ruler is close to the sedimentation value reading ruler.
2. The apparatus for testing the load-bearing capacity of a high-viscosity fluid according to claim 1, wherein: the side wall of the sample container is marked with a scale.
3. The apparatus for testing the load-bearing capacity of a high-viscosity fluid according to claim 1, wherein: the level ruler is a right-angle set square, and two right-angle sides are respectively close to the top of the loading box and the sedimentation value reading ruler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022469721.0U CN213148606U (en) | 2020-10-30 | 2020-10-30 | Bearing capacity performance testing device for high-viscosity fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022469721.0U CN213148606U (en) | 2020-10-30 | 2020-10-30 | Bearing capacity performance testing device for high-viscosity fluid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213148606U true CN213148606U (en) | 2021-05-07 |
Family
ID=75722948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022469721.0U Expired - Fee Related CN213148606U (en) | 2020-10-30 | 2020-10-30 | Bearing capacity performance testing device for high-viscosity fluid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213148606U (en) |
-
2020
- 2020-10-30 CN CN202022469721.0U patent/CN213148606U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210507 |