CN110879175A - Replaceable loading head type load tester for calcareous sand - Google Patents
Replaceable loading head type load tester for calcareous sand Download PDFInfo
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- CN110879175A CN110879175A CN201910930514.XA CN201910930514A CN110879175A CN 110879175 A CN110879175 A CN 110879175A CN 201910930514 A CN201910930514 A CN 201910930514A CN 110879175 A CN110879175 A CN 110879175A
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- loading head
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- 239000004576 sand Substances 0.000 title claims abstract description 23
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims description 14
- 239000000463 material Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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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
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
-
- 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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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a replaceable loading head type load tester of calcareous sand, wherein a supporting mechanism comprises a lower platform, an upper platform, a left vertical beam, a right vertical beam and a rear vertical beam, wherein one end of the left vertical beam, one end of the right vertical beam and one end of the rear vertical beam are respectively and fixedly connected with the upper platform, and the other end of the left vertical beam, the other end of the right vertical beam and the other end of the rear vertical beam are respectively and fixedly connected with the lower platform; the loading mechanism comprises a jack, a lower loading head and an upper loading head, the lower loading head is detachably and fixedly arranged on the jack disc, and the upper loading head is detachably and fixedly arranged on the upper platform; the detection mechanism comprises a pressure sensor, a first CT scanner, a second CT scanner, a third CT scanner and a console, wherein the console forms a closed circuit with the liquid crystal display, the pressure sensor, the first CT scanner, the second CT scanner and the third CT scanner through an external power supply.
Description
Technical Field
The invention belongs to the field of geotechnical engineering tests, and particularly relates to a load tester with a replaceable loading head for calcareous sand.
Background
The sea filling and island making process extracts the existing material from the surrounding sea area directly to make islands, the calcareous sand is distributed in the surrounding sea area more, the strength of the calcareous sand is determined to be a key step, the particle strength has important influence on the macroscopic mechanical property of the particle material, but the calcareous sand particles have irregular shapes, the mechanical property of the material cannot be accurately displayed from multiple aspects by using the existing load testing instrument, so that a replaceable loading head type load testing instrument is provided to test the particle strength, the invention obtains more calcareous sand stress-strain curves under different conditions by replacing the upper and lower loading heads to better describe the mechanical property of the material, applies the material in the actual engineering, the inner pores of the calcareous sand are far different from other materials, and the mechanical property of the material is directly influenced by the number of the pores, and the invention can observe the pore change of the calcareous sand material in the loading process by using a CT scanner, therefore, a solid foundation is laid for the application of the material in practical engineering.
Chinese patent CN203455227U discloses a point load tester, which is simple to operate, easy to obtain data, and high in precision of test results, but the tester can only test the test results under the effect of point load, and cannot well reflect the mechanical properties of the material, and in addition, the shape of the calcareous sand material is irregular, and the point load tester is also difficult to test the complete mechanical properties of the calcareous sand particles.
Disclosure of Invention
In order to solve the problem that the existing load tester can not accurately measure the stress-strain relationship of the calcareous sand, the invention provides a replaceable loading head type load tester capable of measuring the stress-strain relationship of the calcareous sand.
In order to achieve the purpose, the invention adopts the following technical scheme:
a load tester with a replaceable loading head for calcareous sand comprises a supporting mechanism, a loading mechanism and a detection mechanism;
the supporting mechanism comprises a lower platform, an upper platform, a left vertical beam, a right vertical beam and a rear vertical beam, wherein one end of the left vertical beam, one end of the right vertical beam and one end of the rear vertical beam are fixedly connected with the upper platform respectively, and the other end of the left vertical beam, the other end of the right vertical beam and the other end of the rear vertical beam are fixedly connected with the lower platform respectively;
the loading mechanism comprises a jack, a lower loading head and an upper loading head, the lower loading head is detachably and fixedly arranged on the jack disc, the lower loading head is provided with an extension section outwards along the side wall close to the jack disc, the extension section forms a clamping groove with a hollow inner part, the clamping groove is matched with the jack disc, and the clamping groove can be fixedly clamped on the jack disc; the upper loading head is detachably and fixedly arranged on the upper platform; the lower loading head and the upper loading head are opposite in the vertical direction, and the center of the lower loading head and the center of the upper loading head are on the same vertical line; a piece to be tested is arranged between the upper loading head and the lower loading head;
the detection mechanism comprises a pressure sensor, a first CT scanner, a second CT scanner, a third CT scanner and a console, the console comprises a liquid crystal display and a controller, the pressure sensor is arranged between the jack and the lower loading head, the first CT scanner, the second CT scanner and the third CT scanner are respectively and fixedly arranged on the left vertical beam, the right vertical beam and the rear vertical beam, and a scanning area can comprise a whole piece to be tested; the liquid crystal display, the pressure sensor, the first CT scanner, the second CT scanner and the third CT scanner are respectively and electrically connected with the controller of the console through leads, and the console respectively forms a closed circuit with the liquid crystal display, the pressure sensor, the first CT scanner, the second CT scanner and the third CT scanner through an external power supply.
Further, the upper loading head is mounted on the upper platform through a fixed support, and the upper loading head is connected with the fixed support through a bolt or a buckle.
Further, the upper loading head or the lower loading head is a point loading head, a line loading head or a surface loading head.
Furthermore, the CT scanner is respectively fixed on the left vertical beam, the right vertical beam and the rear vertical beam through a first fixing support, a second fixing support and a third fixing support.
The jack loading mode is divided into two modes, namely constant force loading and continuous lifting force loading, and the two loading modes are loaded to a to-be-tested part to be damaged.
The CT scanner can scan the shape of the material on each section of the to-be-tested piece in three directions, so that the shape and the volume of the tested material can be obtained, and the change of the material pore and the volume change of the material, namely the calcareous sand, can be obtained by continuously scanning the CT scanner in the loading process.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention obtains the relation between time and strain, the relation between force and strain and the relation between porosity change and strain of the calcareous sand material in the loading process through a CT scanner and a pressure sensor.
(2) The instrument can also obtain the mechanical characteristics of the calcareous sand material under the action of point load, linear load or surface load by replacing different loading heads up and down.
(3) The experimental instrument is simple to operate, does not need manual calculation, has high accuracy of test results, and can reflect the test results of materials under more stress conditions.
The patent is further described with reference to the following drawings and detailed description.
Drawings
Fig. 1 is a schematic structural diagram of a load tester with a replaceable loading head according to the present invention.
Fig. 2 is a schematic structural diagram of a load tester with a replaceable loading head according to the present invention.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.
As shown in the attached figures 1 and 2: in the figure: 1. the device comprises a lower platform, 2, an upper platform, 3-1, a left vertical beam, 3-2, a right vertical beam, 3-1, a rear vertical beam, 4, a liquid crystal display, 5, a controller, 6-1, a first fixed support, 6-2, a second fixed support, 6-3, a third fixed support, 7-1, a first CT scanner, 7-2, a second CT scanner, 7-3, a third CT scanner, 8, a jack, 9, a lower loading head, 10, an upper loading head, 11, a fixed support, 12, a clamping groove, 13 and a pressure sensor.
Example 1
A load tester with a replaceable loading head for calcareous sand comprises a supporting mechanism, a loading mechanism and a detection mechanism;
the supporting mechanism comprises a lower platform 1, an upper platform 2, a left vertical beam 3-1, a right vertical beam 3-2 and a rear vertical beam 3-3, wherein one end of the left vertical beam 3-1, one end of the right vertical beam 3-2 and one end of the rear vertical beam 3-3 are respectively fixedly connected with the upper platform 2, and the other end of the left vertical beam 3-1, the other end of the right vertical beam 3-2 and the other end of the rear vertical beam 3-3 are respectively fixedly connected with the lower platform 1;
the loading mechanism comprises a jack 8, a lower loading head 9 and an upper loading head 10, the upper loading head and the lower loading head are point loading heads, the lower loading head 9 is detachably and fixedly mounted on a top disc of the jack 8, an extension section is outwards arranged on the side, close to the top disc of the jack 8, of the lower loading head 9 along the side wall, a clamping groove 12 with a hollow inner part is formed in the extension section, the clamping groove 12 is matched with the top disc of the jack 8, and the clamping groove 12 can be fixedly clamped on the top disc of the jack 8; the upper loading head 10 is mounted on the upper platform 2 through a fixed support 11, and the upper loading head 10 is connected with the fixed support 11 through a bolt.
The lower loading head 9 and the upper loading head 10 are opposite in the vertical direction, and the center of the lower loading head 9 and the center of the upper loading head 10 are on the same vertical line; a piece to be tested is arranged between the upper loading head 10 and the lower loading head 9;
the detection mechanism comprises a pressure sensor 13, a first CT scanner 7-1, a second CT scanner 7-2, a third CT scanner 7-3 and a console, the console comprises a liquid crystal display 4 and a controller 5, the pressure sensor 13 is arranged between the jack 8 and the lower loading head 9, the CT scanners are respectively fixed on the left vertical beam 3-1, the right vertical beam 3-2 and the rear vertical beam 3-3 through a first fixing support 6-1, a second fixing support 6-2 and a third fixing support 6-3, and a scanning area can comprise the whole piece to be tested; the liquid crystal display 4, the pressure sensor 13, the first CT scanner 7-1, the second CT scanner 7-2 and the third CT scanner 7-3 are respectively and electrically connected with the controller 5 of the console through leads, and the console is respectively and electrically connected with the liquid crystal display 4, the pressure sensor 13, the first CT scanner 7-1, the second CT scanner 7-2 and the third CT scanner 7-3 through an external power supply to form a closed circuit. In a specific experiment, different upper and lower loading heads are selected according to needs, the upper loading head 10 and the lower loading head 9 are replaced, a loading mode (force-invariant loading or force-enhanced loading) is input into the controller 5, a loading function is achieved by lifting the jack 8 upwards, pressure change in the loading process is obtained through the pressure sensor 13, volume change of a sample to be loaded is measured in real time by the first CT scanner 7-1, the second CT scanner 7-2 and the third CT scanner 7-3 in the loading process, and a mechanical image is displayed by the liquid crystal display 4.
This patent simple structure, convenient operation easily shows the test result, uses various sensors and measures and calculate through the treater is automatic, and the test result accuracy is high, is applicable to the mechanical properties of test granule.
Claims (4)
1. The utility model provides a load tester of removable loading head of calcareous sand which characterized in that: the load tester comprises a supporting mechanism, a loading mechanism and a testing mechanism;
the supporting mechanism comprises a lower platform (1), an upper platform (2), a left vertical beam (3-1), a right vertical beam (3-2) and a rear vertical beam (3-3), wherein one end of the left vertical beam (3-1), one end of the right vertical beam (3-2) and one end of the rear vertical beam (3-3) are respectively fixedly connected with the upper platform (2), and the other end of the left vertical beam (3-1), the other end of the right vertical beam (3-2) and the other end of the rear vertical beam (3-3) are respectively fixedly connected with the lower platform (1);
the loading mechanism comprises a jack (8), a lower loading head (9) and an upper loading head (10), the lower loading head (9) is detachably and fixedly installed on a top disc of the jack (8), an extension section is outwards arranged on the side, close to the top disc of the jack (8), of the lower loading head (9) along the side wall, a clamping groove (12) with a hollow inner part is formed in the extension section, the clamping groove (12) is matched with the top disc of the jack (8), and the clamping groove (12) can be fixedly clamped on the top disc of the jack (8); the upper loading head (10) is detachably and fixedly arranged on the upper platform (2); the lower loading head (9) and the upper loading head (10) are opposite in the vertical direction, and the center of the lower loading head (9) and the center of the upper loading head (10) are on the same vertical line; a piece to be tested is arranged between the upper loading head (10) and the lower loading head (9);
the detection mechanism comprises a pressure sensor (13), a first CT scanner (7-1), a second CT scanner (7-2), a third CT scanner (7-3) and a console, the console comprises a liquid crystal display (4) and a controller (5), the pressure sensor (13) is arranged between the jack (8) and the lower loading head (9), the first CT scanner (7-1), the second CT scanner (7-2) and the third CT scanner (7-3) are fixedly arranged on the left vertical beam (3-1), the right vertical beam (3-2) and the rear vertical beam (3-3) respectively, and a scanning area can comprise a whole piece to be tested; the liquid crystal display (4), the pressure sensor (13), the CT scanner I (7-1), the CT scanner II (7-2) and the CT scanner III (7-3) are respectively and electrically connected with the controller (5) of the console through leads, and the console respectively forms a closed circuit with the liquid crystal display (4), the pressure sensor (13), the CT scanner I (7-1), the CT scanner II (7-2) and the CT scanner III (7-3) through an external power supply.
2. A calcic sand load cell with replaceable loading heads as claimed in claim 1 wherein: the upper loading head (10) is mounted on the upper platform (2) through a fixed support (11), and the upper loading head (10) is in bolt or buckle connection with the fixed support (11).
3. A calcic sand load cell with replaceable loading heads as claimed in claim 1 wherein: the upper loading head (10) or the lower loading head (9) is a point loading head, a line loading head or a surface loading head.
4. A calcic sand load cell with replaceable loading heads as claimed in claim 1 wherein: the CT scanner is respectively fixed on the left vertical beam (3-1), the right vertical beam (3-2) and the rear vertical beam (3-3) through a first fixing support (6-1), a second fixing support (6-2) and a third fixing support (6-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910930514.XA CN110879175A (en) | 2019-09-29 | 2019-09-29 | Replaceable loading head type load tester for calcareous sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910930514.XA CN110879175A (en) | 2019-09-29 | 2019-09-29 | Replaceable loading head type load tester for calcareous sand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110879175A true CN110879175A (en) | 2020-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910930514.XA Withdrawn CN110879175A (en) | 2019-09-29 | 2019-09-29 | Replaceable loading head type load tester for calcareous sand |
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| Country | Link |
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| CN (1) | CN110879175A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112113844A (en) * | 2020-09-25 | 2020-12-22 | 中国科学院高能物理研究所 | In-situ mechanical performance testing device and testing method |
| CN112798413A (en) * | 2020-12-11 | 2021-05-14 | 浙江大学 | Broken dynamic monitoring device of calcareous sand granule based on unipolar compression test |
| CN113008674A (en) * | 2021-03-01 | 2021-06-22 | 浙江科技学院 | Rapid detection method for crushing of loaded sand particle aggregate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203455227U (en) * | 2013-09-27 | 2014-02-26 | 湖南科技大学 | Point load test instrument |
| CN104792623A (en) * | 2015-04-23 | 2015-07-22 | 南华大学 | Full-automatic rock point load test instrument |
| CN206362623U (en) * | 2016-08-25 | 2017-07-28 | 绍兴文理学院 | A kind of instrument of field measuring rock point load intensity |
| CN206450514U (en) * | 2017-01-13 | 2017-08-29 | 辽宁工程技术大学 | A kind of use CT carefully sees the Thermal-mechanical Coupling loading tester of scanning to rock in real time |
| CN108398331A (en) * | 2018-02-23 | 2018-08-14 | 山东大学 | A kind of rock multiple information acquisition system and test method |
| CN211318000U (en) * | 2019-09-29 | 2020-08-21 | 浙江工业大学 | Replaceable loading head type load tester for calcareous sand |
-
2019
- 2019-09-29 CN CN201910930514.XA patent/CN110879175A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203455227U (en) * | 2013-09-27 | 2014-02-26 | 湖南科技大学 | Point load test instrument |
| CN104792623A (en) * | 2015-04-23 | 2015-07-22 | 南华大学 | Full-automatic rock point load test instrument |
| CN206362623U (en) * | 2016-08-25 | 2017-07-28 | 绍兴文理学院 | A kind of instrument of field measuring rock point load intensity |
| CN206450514U (en) * | 2017-01-13 | 2017-08-29 | 辽宁工程技术大学 | A kind of use CT carefully sees the Thermal-mechanical Coupling loading tester of scanning to rock in real time |
| CN108398331A (en) * | 2018-02-23 | 2018-08-14 | 山东大学 | A kind of rock multiple information acquisition system and test method |
| CN211318000U (en) * | 2019-09-29 | 2020-08-21 | 浙江工业大学 | Replaceable loading head type load tester for calcareous sand |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112113844A (en) * | 2020-09-25 | 2020-12-22 | 中国科学院高能物理研究所 | In-situ mechanical performance testing device and testing method |
| CN112798413A (en) * | 2020-12-11 | 2021-05-14 | 浙江大学 | Broken dynamic monitoring device of calcareous sand granule based on unipolar compression test |
| CN113008674A (en) * | 2021-03-01 | 2021-06-22 | 浙江科技学院 | Rapid detection method for crushing of loaded sand particle aggregate |
| CN113008674B (en) * | 2021-03-01 | 2024-04-26 | 浙江科技学院 | Rapid detection method for broken sand particle aggregate after loading |
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Application publication date: 20200313 |
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| WW01 | Invention patent application withdrawn after publication |