CN103760028A - Confining pressure loading device for laboratory rock strength - Google Patents
Confining pressure loading device for laboratory rock strength Download PDFInfo
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- CN103760028A CN103760028A CN201410006980.6A CN201410006980A CN103760028A CN 103760028 A CN103760028 A CN 103760028A CN 201410006980 A CN201410006980 A CN 201410006980A CN 103760028 A CN103760028 A CN 103760028A
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- cylindrical shell
- drum
- rock
- confining pressure
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Abstract
The invention relates to a confining pressure loading device for laboratory rock strength. The confining pressure loading device comprises a cylindrical drum, the lower end of the drum is fixedly arranged on a bearing seat, a loading cover for closing the drum is arranged on the upper end of the drum, the drum is internally sheathed with a sealing element, the sealing element consists of an upper lantern ring and a lower lantern ring which are connected by upright threads and are symmetrical, the peripheries of the two lantern rings are connected with the inner wall of the drum by threads, waterproof adhesive tapes are arranged on external threads of the two lantern rings, the sealing part is internally provided with a rubber sleeve for wrapping a rock test piece, an interlayer cavity is formed between the rubber sleeve and the inner wall of the drum, and the drum has a through hole which is communicated with the interlayer cavity. The circumferentially evenly distributed confining pressure applied by the confining pressure loading device can ensure uniform distribution of stress to the greatest extent before the rock test piece is damaged, thus the test effectiveness and the reliability of the test results can be improved; on the basis of meeting the laboratory demand, the device is simple in structure, easy for connection components to assemble and disassemble, and good in sealing property.
Description
Technical field
The present invention relates to the confined pressure charger of rock sample in rock mechanics experiment, specifically a kind of confined pressure charger of use for laboratory rock testing.
Background technology
The field of civil engineering such as building, traffic, water conservancy often relate to the interaction of Rock And Soil and water, when the Rock And Soil in Practical Project and water interaction, also be subject to the pressure-acting of water (aqueous solution that contains various chemical compositions), the dynamic properties of soils of study of rocks, its objective is and understand and grasp the dynamic properties of soils of rock under different loading history and conditions, to provide foundation for design and the excavation of rock power side slope and deep rock mass engineering project.In underground works, it is relevant that the compressive strength of rock and covering of rock mass are deposited the degree of depth (confined pressure load), deep rock mass has more complicated geomechanics background, be high-ground stress, High-geotemperature, high karst water pressure, strong exploitation disturbance, thereby its distortion, strength characteristics of embodying after stressed are different from superficial part rock mass, and along with the degree of depth is deepened the continuous rising of ground temperature, the excavation to engineering and deep underground works can work the mischief, and even hinder people's activity in production.Generally, the relation of compressive strength of rock and confined pressure load can obtain by the method for test.At present, what extensively adopt is Hopkinson Dynamic Test Fixture, as drops hammer and light-gas gun, because rock sample is when being subject to very little failure strain, will cause the destruction in advance of its stress equilibrium, the validity of impact test, and the former is in process of the test, particularly for large-sized rock sample, be difficult to realize constant load, constant strain rate and stress equalizing, the latter's equipment complexity, operating cost is high, has exceeded the cost scope that laboratory can be born.In existing laboratory, also there is follow-on SHPB device of employing, comprise incident bar, transmission bar, data acquisition system (DAS) and confined pressure charger, there is the defect that is difficult to exist because of sealing problem in dismounting, process of the test leakage of oil after off-test in this device, affects the reliability of test findings.
Summary of the invention
The destruction in advance that the object of the invention is to overcome existing confined pressure charger easily cause rock sample stress equilibrium in process of the test, or leakage of oil and the comparatively complicated defect of equipment, provide a kind of confined pressure charger of use for laboratory rock testing.
For achieving the above object, the technical solution adopted in the present invention is: the confined pressure charger of use for laboratory rock testing, comprise columniform cylindrical shell, the lower end of cylindrical shell is fixed on load bearing seat, the upper end of cylindrical shell is provided with for rock sample being sealed in to the loading lid in cylindrical shell, in described cylindrical shell, be arranged with seal, seal is comprised of two the symmetrical collars up and down that are threaded by column, the periphery of two collars and the inwall of cylindrical shell are threaded connection, and the external thread of two collars is provided with adhesive waterproof tape, in described seal, be provided with the rubber sleeve for wrapping up rock sample, between rubber sleeve and cylinder inboard wall, form an interlayer cavity, cylindrical shell is provided with the through hole being connected with this interlayer cavity.
The lower end of described cylindrical shell is provided with boss, between boss and load bearing seat, is bolted.
The upper end of described cylindrical shell is provided with the boss that loads lid for carrying.
The two ends of described rubber sleeve are separately fixed on the inwall of two collars by glue.
The present invention in use, rock sample is implanted in the rubber sleeve of cylindrical shell, then cylindrical shell is positioned between the platform and pressure head of test pressing machine, by the through hole injection liquid force feed on cylindrical shell or in order to simulate the slurry of rock stratum, deep, rock sample is carried out to applying of confined pressure load, reach after predetermined confined pressure value, the pressure head of relief pressure machine, carries out the experiment of rock sample intensity.
Beneficial effect: (1), this device apply the confined pressure load of hoop to rock sample by the through hole injection slurry on cylindrical shell, and rubber sleeve makes rock sample isolated with the slurry injecting, the uniform confined pressure of hoop can farthest guarantee that rock sample, being uniformly distributed of destroyed front maintenance stress, avoids rock sample to destroy before stress equilibrium prerequisite;
(2) particularly for large scale rock test specimen, under laboratory condition, can realize by adjusting the height of cylindrical shell and the ratio in aperture, realize maximized stress equalizing, farthest guarantee that test specimen keeps stress equilibrium to distribute before destruction, improves the validity of test and the reliability of test findings;
(3) this device is on the basis that meets laboratory requirement, simple in structure, and the easy assembly and disassembly of each link.Owing to adding adhesive waterproof tape by screw thread between the cylindrical shell of the collar in this device, connect, good seal performance, meanwhile, rock sample can be implanted in rubber sleeve and test after assembling in any one end.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of seal in Fig. 1.
Reference numeral: 1, rock sample, 2, load lid, 3, seal, 301, the collar, 302, column, 4, rubber sleeve, 5, cylindrical shell, 501, boss, 6, load bearing seat, 7, through hole.
Embodiment
As shown in Figure 1, the confined pressure charger of use for laboratory rock testing, this device comprises the cylindrical shell 5 of vertical type cylinder shape, the two ends up and down of cylindrical shell 5 are equipped with boss, wherein, the boss of cylindrical shell 5 lower ends is provided with threaded hole, and the boss of cylindrical shell 5 lower ends is arranged on load bearing seat 6 by bolt, and the upper end of cylindrical shell 5 is provided with for rock sample being sealed in to the loading lid 2 in cylindrical shell 5.In cylindrical shell 5, be arranged with the seal 3 contour with cylindrical shell 5, as shown in Figure 2, seal 3 is comprised of two collars 301 and two root posts 302, wherein, two collars 301 removably link together by two root posts 302, as correspondence on two collars 301 is provided with threaded hole, two root posts 302 are threaded with two collars 301, the external thread of described two collars 301 is provided with adhesive waterproof tape, in described seal 3, be provided with the rubber sleeve 4 for wrapping up rock sample 1, the two ends of rubber sleeve 4 are separately fixed at by glue on the inwall of two collars 301, between rubber sleeve 4 and cylindrical shell 5 inwalls, form an interlayer cavity, cylindrical shell 5 is provided with the through hole 7 being connected with this interlayer cavity.
Further, the lower end of this cylindrical shell 5 is provided with boss, between boss and load bearing seat 6, is bolted.
Further, the upper end of this cylindrical shell 5 is provided with for carrying and loads the boss that covers 2.
This device in use, first, connects the collar 301 of two parts up and down of seal 3, and rubber sleeve 4 use glue is fixed in seal 3 by column 302; Secondly, in seal 3 outside screw, adhesive waterproof tape is set, seal 3 is tightened on cylindrical shell 5, and the rock sample processing 1 is implanted in rubber sleeve 4 by any one end of cylindrical shell 5; Then, load bearing seat 6 is arranged on to one end of cylindrical shell 5 by bolt, at the other end of cylindrical shell 5, installs to load and cover 2; Finally, this confined pressure charger is placed between the platform and pressure head of test pressing machine, injects slurry carry out applying of confined pressure load by the through hole 7 on cylindrical shell 5, relief pressure compressing head carries out the experiment of rock strength.
In the present invention, obtaining by conventional hydralic pressure gauge of confined pressure value realizes, and according to the size of the required confined pressure of experiment, selects the hydralic pressure gauge of different ranges.Confined pressure charger is placed between the platform and pressure head of test pressing machine, by the through hole 7 on cylindrical shell 5, in interlayer cavity between rubber sleeve 4 and cylindrical shell 5 inwalls, inject slurry, carry out applying of confined pressure load, relief pressure compressing head carries out axial pressurization, in the increase process of axle pressure, in rock sample 1, will produce shear stress, if wherein the shear stress of certain position reaches its shearing strength, in the both sides of this shear surface, will produce relative displacement, finally destroyed.Because the periphery of rock sample 1 is wrapped up by slurry, 1 simulation applies confined pressure to rock sample to utilize slurry, guarantee in rock sample 1 being evenly distributed of acting force on border, avoid rock sample 1 to destroy before stress equilibrium prerequisite, improve the validity of test and the reliability of test findings.This device has feature simple in structure, easy to use and that sealing property is good, can realize safely, efficiently, reliably confined pressure loading experiment.
Claims (4)
1. the confined pressure charger of use for laboratory rock testing, comprise columniform cylindrical shell (5), the lower end of cylindrical shell (5) is fixed on load bearing seat (6), the upper end of cylindrical shell (5) is provided with for rock sample (1) being sealed in to the loading lid (2) in cylindrical shell (5), it is characterized in that: in described cylindrical shell (5), be arranged with seal (3), seal (3) is comprised of two the symmetrical collars (301) up and down that are threaded by column (302), the inwall of the periphery of two collars (301) and cylindrical shell (5) is threaded connection, and the external thread of two collars (301) is provided with adhesive waterproof tape, in described seal (3), be provided with the rubber sleeve (4) for wrapping up rock sample (1), between rubber sleeve (4) and cylindrical shell (5) inwall, form an interlayer cavity, cylindrical shell (5) is provided with the through hole (7) being connected with this interlayer cavity.
2. the confined pressure charger of use for laboratory rock testing according to claim 1, is characterized in that: the lower end of described cylindrical shell (5) is provided with boss, and boss and load bearing seat are bolted between (6).
3. the confined pressure charger of use for laboratory rock testing according to claim 1, is characterized in that: the upper end of described cylindrical shell (5) is provided with the boss that loads lid (2) for carrying.
4. the confined pressure charger of use for laboratory rock testing according to claim 1, is characterized in that: the two ends of described rubber sleeve (4) are separately fixed on the inwall of two collars (301) by glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410006980.6A CN103760028B (en) | 2014-01-07 | 2014-01-07 | The confined pressure charger of use for laboratory rock testing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410006980.6A CN103760028B (en) | 2014-01-07 | 2014-01-07 | The confined pressure charger of use for laboratory rock testing |
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| CN103760028A true CN103760028A (en) | 2014-04-30 |
| CN103760028B CN103760028B (en) | 2016-08-24 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954109A (en) * | 2016-04-29 | 2016-09-21 | 温州大学 | Vacuum consolidation test device of unit soil sample under triaxial state |
| CN107421869A (en) * | 2017-07-30 | 2017-12-01 | 福州大学 | A kind of crack rock infiltration coefficient evolution test device and test method |
| CN107966371A (en) * | 2017-12-20 | 2018-04-27 | 北京科技大学 | A kind of portable self sealss rock SHPB experiments confined pressure pressue device |
| CN109781539A (en) * | 2019-01-25 | 2019-05-21 | 中国人民解放军军事科学院国防工程研究院 | A kind of target plate three-dimensional confining pressure body structure for body depth penetration test |
| CN111238950A (en) * | 2019-03-22 | 2020-06-05 | 湘潭大学 | Rock confining pressure device |
| CN111579373A (en) * | 2020-05-29 | 2020-08-25 | 浙江礼显试验仪器制造有限公司 | Testing machine for measuring compressive strength |
| CN111678805A (en) * | 2020-05-11 | 2020-09-18 | 江苏禹治流域管理技术研究院有限公司 | Rock dynamic shear strength device and method based on SHPB (shear stress relaxation testing) |
| CN114112664A (en) * | 2021-11-20 | 2022-03-01 | 中国人民解放军国防科技大学 | Constant confining pressure loading experimental device |
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| CN203658163U (en) * | 2014-01-07 | 2014-06-18 | 洛阳理工学院 | Confining pressure loading device for rock strength test in lab |
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| CN201126420Y (en) * | 2007-12-15 | 2008-10-01 | 辽宁工程技术大学 | Triaxial test confined pressure loading barrel |
| CN201527390U (en) * | 2009-11-04 | 2010-07-14 | 山东中石大石仪科技有限公司 | Core holding unit with adjustable quick installation core plug |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954109A (en) * | 2016-04-29 | 2016-09-21 | 温州大学 | Vacuum consolidation test device of unit soil sample under triaxial state |
| CN107421869A (en) * | 2017-07-30 | 2017-12-01 | 福州大学 | A kind of crack rock infiltration coefficient evolution test device and test method |
| CN107966371A (en) * | 2017-12-20 | 2018-04-27 | 北京科技大学 | A kind of portable self sealss rock SHPB experiments confined pressure pressue device |
| CN109781539A (en) * | 2019-01-25 | 2019-05-21 | 中国人民解放军军事科学院国防工程研究院 | A kind of target plate three-dimensional confining pressure body structure for body depth penetration test |
| CN109781539B (en) * | 2019-01-25 | 2023-10-24 | 中国人民解放军军事科学院国防工程研究院 | Target plate three-way confining pressure box structure for projectile deep penetration test |
| CN111238950A (en) * | 2019-03-22 | 2020-06-05 | 湘潭大学 | Rock confining pressure device |
| CN111238950B (en) * | 2019-03-22 | 2023-03-21 | 湘潭大学 | Rock confining pressure device |
| CN111678805A (en) * | 2020-05-11 | 2020-09-18 | 江苏禹治流域管理技术研究院有限公司 | Rock dynamic shear strength device and method based on SHPB (shear stress relaxation testing) |
| CN111579373A (en) * | 2020-05-29 | 2020-08-25 | 浙江礼显试验仪器制造有限公司 | Testing machine for measuring compressive strength |
| CN111579373B (en) * | 2020-05-29 | 2021-04-16 | 浙江礼显试验仪器制造有限公司 | Testing machine for measuring compressive strength |
| CN114112664A (en) * | 2021-11-20 | 2022-03-01 | 中国人民解放军国防科技大学 | Constant confining pressure loading experimental device |
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| CN103760028B (en) | 2016-08-24 |
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