CN105466760A - Hollow cylinder torsion shear strain measurement device for rock - Google Patents
Hollow cylinder torsion shear strain measurement device for rock Download PDFInfo
- Publication number
- CN105466760A CN105466760A CN201510848358.4A CN201510848358A CN105466760A CN 105466760 A CN105466760 A CN 105466760A CN 201510848358 A CN201510848358 A CN 201510848358A CN 105466760 A CN105466760 A CN 105466760A
- Authority
- CN
- China
- Prior art keywords
- steel disc
- disc
- screw
- hollow cylinder
- disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a hollow cylinder torsion shear strain measurement device for rock. The hollow cylinder torsion shear strain measurement device comprises a disc provided with a round hole in the center, wherein three threaded holes are formed in the circumferential direction of the disc uniformly and penetrate through the inner wall and the outer wall of the disc, and the round disc is connected with an upper pressure head through the threaded holes; the device further comprises a first steel sheet and a strain sensor, the strain sensor comprises a second steel sheet and a resistor disc, a groove is formed in the second steel sheet, the resistor disc is attached to the bottom of the groove, and a cable connected with the resistor disc is led out of a confining pressure chamber; one end of the first steel sheet is fixedly connected with the disc, a first threaded hole is formed in the other end of the first steel sheet, a first screw is formed in the first threaded hole and penetrates through the first steel sheet, the end of the first screw is propped against one end of the second steel sheet, and the first steel sheet and the second steel sheet are horizontally arranged; the other end of the second steel sheet is fixedly connected with one end of a cylinder rod, and the other end of the cylinder rod is fixed on a device base. The hollow cylinder torsion shear strain measurement device is reasonable in design, simple in structure, high in sensitivity and good in stability.
Description
Technical field
The present invention relates to rock deformation to measure, specifically refer to a kind of rock hollow cylinder torsional shear strain gauge means.
Background technology
Along with the complexity of engineering construction continues to increase, in order to understand the mechanical property of Test in Situ better, need to carry out indoor mechanical test research to obtain intensity, the deformation and failure form of rock under complex stress effect to rock.The deformation failure because of rock is avoided to cause great engineering accident.
In engineering rock mass digging in-situ process, the stress state of rock mass inside is very complicated, shows as: in the constant situation in principal axis of stress direction, in principle stress size variation, the constant situation of principle stress size, principal axis of stress rotation, principal axis of stress direction rotate and principle stress size variation.Consider from macroscopic perspective, the change of above-mentioned stress state can cause rock mass to produce plastic yield, and elastic parameter and intensive parameter change; Consider from microcosmic angle, there are microfissure generation, through and expansion in rock mass inside.
At present, according to the loading characteristic of hollow cylinder sample, the hollow cylinder torsional shear instrument being applicable to soil sample and rock sample has been developed in Geotechnical Engineering field, can realize the stress path of the complexity such as principal axis of stress rotation.For rock hollow cylinder torsional shear instrument, strain measurement mainly adopts the mode at rock sample surface mount foil gauge at present, mainly there is following shortcoming in this kind of mode: 1) processes in rock sample process, the inwall of endoporus is rough, have brill line, foil gauge well can not be fitted with rock sample inwall; 2) the rock sample size for testing is less, and the work space pasting foil gauge in rock sample endoporus is little, is difficult to the paste position of controlled strain sheet, causes the strain recorded to produce error; 3) foil gauge is very fragile, fragile in later stage rock sample preparation process, and once be damaged, just can only abandon the data acquisition of this position, causes the data obtained imperfect; 4) data that foil gauge records can only reflect the distortion of sticking area local, have limitation.
Strain gauge method precision and reliability are not high, troublesome poeration, cause Test Data Collecting limited, affect the analysis of test findings.
Summary of the invention
Object of the present invention will provide a kind of rock hollow cylinder torsional shear strain gauge means exactly, the first steel disc is driven to rotate by disk, thus make the termination of the first screw apply pressure to one end of the second steel disc, because the other end of the second steel disc is fixed, second steel disc is deformed, the torsional shear strain of hollow cylinder rock sample can be realized like this to be amplified to exponentially on the position at resistor disc place.
For achieving the above object, a kind of rock hollow cylinder torsional shear strain gauge means designed by the present invention, the torsional shear strain of rock sample is measured for being placed on confined pressure room, it comprises the disk of middle its central band circular hole, described disk along the circumferential direction evenly offers three threaded holes, described threaded hole runs through the inner and outer wall of disk, and described disk is connected with seaming chuck by threaded hole; Also comprise the first steel disc and strain gauge transducer, described strain gauge transducer comprises the second steel disc and resistor disc, described second steel disc offer groove, described resistor disc is attached to bottom portion of groove, and the cable that described resistor disc connects is drawn from confined pressure room; One end of described first steel disc is fixedly connected with disk, and the described first steel disc other end offers in the first screw, and described first screw is provided with the first screw; Described first screw runs through the first steel disc, and conflict in the end of described first screw and one end of the second steel disc, described first steel disc and the second steel disc are horizontally disposed; The described other end of the second steel disc is fixedly connected with one end of cylindrical bar, and the other end of cylindrical bar is fixed on instrument base.
Preferably, described resistor disc near the other end of the second steel disc, away from one end of the second steel disc.
Further, the outer wall of described disk offers L-type breach, that L-type breach is close in one end of described first steel disc and be fixedly connected with disk by the second screw.
Again further, the other end of described second steel disc offers the second screw, and one end of described cylindrical bar is fixedly connected with the other end of screw with described second steel disc by the second screw.
Further, described instrument base is fixed with LVDT displacement transducer, the contact of described LVDT displacement transducer and disk contact.
The invention has the advantages that:
One, the present invention drives the first steel disc to rotate by disk, thus make the termination of the first screw touch one end of the second steel disc, because the other end of the second steel disc is fixed, second steel disc is deformed, the torsional shear strain of hollow cylinder rock sample can be realized like this to be amplified to exponentially on the position at resistor disc place.
Its two, the second steel disc of the present invention is less than steel plate thickness corresponding to other position at the steel plate thickness that resistor disc position is corresponding, and this makes the second steel disc deform mainly to concentrate on steel disc position corresponding to resistor disc, make whole measurement mechanism highly sensitive.
Three, the present invention is reasonable in design, and structure is simple, and highly sensitive, good stability, is applicable to the strain measurement of rock hollow cylinder torsional scissor test.
Its four, LVDT is fixed on instrument base by the present invention, its contact and disk contact, can be used for measuring the axial strain of rock sample.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of rock hollow cylinder torsional shear strain gauge means;
Fig. 2 is the diagrammatic cross-section of Fig. 1 along A-A direction;
Fig. 3 is cylindrical bar of the present invention and strain gauge transducer connection diagram.
In figure: disk 1 (wherein: circular hole 1.1, threaded hole 1.2, L-type breach 1.3); First steel disc 2 (wherein: the first screw 2.1, first screw 2.2, second screw 2.3); Strain gauge transducer 3 (wherein: the second steel disc 3.1, resistor disc 3.2, groove 3.11, the second screw 3.12); Cable 4; Cylindrical bar 5.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but this embodiment should not be construed limitation of the present invention.
A kind of rock hollow cylinder torsional shear strain gauge means as depicted in figs. 1 and 2, measures the torsional shear strain of hollow cylinder rock sample for being placed on confined pressure room.It comprises the disk 1 of middle its central band circular hole 1.1, and disk 1 along the circumferential direction evenly offers three threaded holes 1.2, and threaded hole 1.2 runs through the inner and outer wall of disk 1, and disk 1 is connected with seaming chuck by threaded hole 1.2.The outer wall of disk 1 offers L-type breach 1.3 between any two threaded holes 1.2.
It also comprises the first steel disc 2 and strain gauge transducer 3, strain gauge transducer 3 comprises the second steel disc 3.1 and resistor disc 3.2, second steel disc 3.1 offer groove 3.11, resistor disc 3.2 is attached to bottom groove 3.11, resistor disc 3.2 connect cable 4 draw from confined pressure room.Wherein, resistor disc 3.2 near the other end of the second steel disc 3.1, away from one end of the second steel disc 3.1.One end of first steel disc 2 is close to one side of L-type breach 1.3 and is fixedly connected with disk 1 by the second screw 2.3; The other end of the first steel disc 2 offers in the first screw 2.1, and the first screw 2.1 is provided with the first screw 2.2.Conflict in one end of end and the second steel disc 3.1 that first screw 2.2 runs through the first steel disc 2, first screw 2.2, the first steel disc 2 and the second steel disc 3.1 are in horizontally disposed.As shown in Figure 3, the other end of the second steel disc 2 offers the second screw 3.12, and one end of cylindrical bar 5 is fixedly connected with the other end of screw with the second steel disc 2 by the second screw 3.12, and the other end of cylindrical bar 5 is fixed on instrument base.
One as the present embodiment is improved, and instrument base is fixed with LVDT displacement transducer, and the contact of LVDT displacement transducer contacts with disk 1.Such disk 1 can also be used for the axial strain of measuring rock sample.
When the present invention works, rock hollow cylinder torsional shear strain gauge means is placed on confined pressure indoor, when hollow cylinder rock sample rotates, disk 1 can drive the first steel disc 2 to rotate, thus make the termination of the first screw 2.2 apply pressure to one end of the second steel disc 3.1, because the other end of the second steel disc 3.1 is fixed, the second steel disc 3.1 is deformed, the torsional shear strain of hollow cylinder rock sample can be realized like this to be amplified to exponentially on the position at resistor disc 3.2 place.In addition, disk 1 may be used for the axial strain of measuring rock sample, and be fixed on by LVDT on instrument base, its contact contacts with disk 1, due to the constraint of disk 1, can record the axial strain of rock sample.
The content be not described in detail in this instructions, belongs to the known prior art of those skilled in the art.
Claims (5)
1. a rock hollow cylinder torsional shear strain gauge means, the torsional shear strain of hollow cylinder rock sample is measured for being placed on confined pressure room, it is characterized in that: it comprises the disk (1) of middle its central band circular hole (1.1), described disk (1) along the circumferential direction evenly offers three threaded holes (1.2), described threaded hole (1.2) runs through the inner and outer wall of disk (1), and described disk (1) is connected with seaming chuck by threaded hole (1.2); Also comprise the first steel disc (2) and strain gauge transducer (3), described strain gauge transducer (3) comprises the second steel disc (3.1) and resistor disc (3.2), described second steel disc (3.1) offer groove (3.11), described resistor disc (3.2) is attached to groove (3.11) bottom, and the cable (4) that described resistor disc (3.2) connects is drawn from confined pressure room; One end of described first steel disc (2) is fixedly connected with disk (1), described first steel disc (2) other end offers in the first screw (2.1), and described first screw (2.1) is provided with the first screw (2.2); Described first screw (2.2) runs through the first steel disc (2), conflict in the end of described first screw (2.2) and one end of the second steel disc (3.1), described first steel disc (2) and the second steel disc (3.1) are in horizontally disposed; The other end of described second steel disc (2) is fixedly connected with one end of cylindrical bar (5), and the other end of cylindrical bar (5) is fixed on instrument base.
2. rock hollow cylinder torsional shear strain gauge means according to claim 1, is characterized in that: the other end of close second steel disc (3.1) of described resistor disc (3.2), away from one end of the second steel disc (3.1).
3. rock hollow cylinder torsional shear strain gauge means according to claim 1, it is characterized in that: the outer wall of described disk (1) offers L-type breach (1.3), being also fixedly connected with disk (1) by the second screw (2.3) of L-type breach (1.3) is close in one end of described first steel disc (2).
4. rock hollow cylinder torsional shear strain gauge means according to claim 1, it is characterized in that: the other end of described second steel disc (2) offers the second screw (3.12), one end of described cylindrical bar (5) is fixedly connected with the other end of screw with described second steel disc (2) by the second screw (3.12).
5. rock hollow cylinder torsional shear strain gauge means according to claim 1, is characterized in that: described instrument base is fixed with LVDT displacement transducer, and the contact of described LVDT displacement transducer contacts with disk (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510848358.4A CN105466760B (en) | 2015-11-27 | 2015-11-27 | Rock hollow cylinder torsional shear strain gauge means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510848358.4A CN105466760B (en) | 2015-11-27 | 2015-11-27 | Rock hollow cylinder torsional shear strain gauge means |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105466760A true CN105466760A (en) | 2016-04-06 |
| CN105466760B CN105466760B (en) | 2017-11-14 |
Family
ID=55604701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510848358.4A Active CN105466760B (en) | 2015-11-27 | 2015-11-27 | Rock hollow cylinder torsional shear strain gauge means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105466760B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323765A (en) * | 2016-08-25 | 2017-01-11 | 上海交通大学 | Hollow cylinder anisotropism tester for granular materials |
| CN106441210A (en) * | 2016-11-18 | 2017-02-22 | 中国科学院武汉岩土力学研究所 | Device for measuring circumferential strain of rock specimen |
| CN107421821A (en) * | 2017-07-31 | 2017-12-01 | 安徽理工大学 | A kind of rock is turned round and cuts pressure comprehensive experimental device |
| CN107421812A (en) * | 2017-07-31 | 2017-12-01 | 安徽理工大学 | A kind of rock is turned round and cuts drawing comprehensive experimental device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002195804A (en) * | 2000-12-26 | 2002-07-10 | Shimadzu Corp | Strain gauge type displacement gauge |
| CN201138255Y (en) * | 2007-12-29 | 2008-10-22 | 中国科学院力学研究所 | Measurement mechanism for measuring structural surface strain |
| CN101603867A (en) * | 2009-07-17 | 2009-12-16 | 上海应用技术学院 | With the collector ring group be the torque sensor of one |
| CN202947927U (en) * | 2012-12-10 | 2013-05-22 | 中国矿业大学 | Automatic data collection device of direct shear apparatus |
| CN203687865U (en) * | 2014-02-25 | 2014-07-02 | 中国矿业大学 | Radial displacement measuring device used for cylindrical standard rock specimen |
| CN205192842U (en) * | 2015-11-27 | 2016-04-27 | 中国科学院武汉岩土力学研究所 | Rock hollow cylinder turns round shearing strain measuring device |
-
2015
- 2015-11-27 CN CN201510848358.4A patent/CN105466760B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002195804A (en) * | 2000-12-26 | 2002-07-10 | Shimadzu Corp | Strain gauge type displacement gauge |
| CN201138255Y (en) * | 2007-12-29 | 2008-10-22 | 中国科学院力学研究所 | Measurement mechanism for measuring structural surface strain |
| CN101603867A (en) * | 2009-07-17 | 2009-12-16 | 上海应用技术学院 | With the collector ring group be the torque sensor of one |
| CN202947927U (en) * | 2012-12-10 | 2013-05-22 | 中国矿业大学 | Automatic data collection device of direct shear apparatus |
| CN203687865U (en) * | 2014-02-25 | 2014-07-02 | 中国矿业大学 | Radial displacement measuring device used for cylindrical standard rock specimen |
| CN205192842U (en) * | 2015-11-27 | 2016-04-27 | 中国科学院武汉岩土力学研究所 | Rock hollow cylinder turns round shearing strain measuring device |
Non-Patent Citations (1)
| Title |
|---|
| 常防震 等: "一种基于应变采集***的土性检测扭剪装置", 《第十五届中国海洋（岸）工程学术讨论会论文集》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323765A (en) * | 2016-08-25 | 2017-01-11 | 上海交通大学 | Hollow cylinder anisotropism tester for granular materials |
| CN106441210A (en) * | 2016-11-18 | 2017-02-22 | 中国科学院武汉岩土力学研究所 | Device for measuring circumferential strain of rock specimen |
| CN107421821A (en) * | 2017-07-31 | 2017-12-01 | 安徽理工大学 | A kind of rock is turned round and cuts pressure comprehensive experimental device |
| CN107421812A (en) * | 2017-07-31 | 2017-12-01 | 安徽理工大学 | A kind of rock is turned round and cuts drawing comprehensive experimental device |
| CN107421821B (en) * | 2017-07-31 | 2019-06-25 | 安徽理工大学 | A kind of torsion of rock cuts-press comprehensive experimental device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105466760B (en) | 2017-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105466760A (en) | Hollow cylinder torsion shear strain measurement device for rock | |
| CN108645562B (en) | Three-axis Hopkinson rod synchronous dynamic calibration device and method for three-dimensional impact force sensor | |
| CN113605887B (en) | Deep drilling complex environment local wall stress relief test method and system | |
| CN103149078A (en) | Tension-compression-torsion-shearing coupling-based stress path triaxial apparatus | |
| CN103994928B (en) | A kind of mechanics acoustics joint test method of rock orientation extrusion fracture process | |
| CN111576500B (en) | Foundation pile quality detection equipment | |
| CN205192842U (en) | Rock hollow cylinder turns round shearing strain measuring device | |
| CN107882011B (en) | miniature probe with temperature compensation function | |
| CN203785867U (en) | Safety valve online verification and adjustment device | |
| CN106932277A (en) | Based on interface ultrasonic reflections rate pressure relation curve method for building up and bracket loading test platform that fillet plane contact is theoretical | |
| CN104483206A (en) | Device and method for measuring shearing property of transverse isotropic material | |
| CN208155291U (en) | A kind of detection device of contact drilling quality | |
| CN107218884B (en) | Drilling strain gauge complete machine performance testing device and testing method | |
| CN105403141A (en) | Circumferential strain gauge for inner wall of circular hole | |
| CN210603720U (en) | Contrast type calibration device for six-dimensional force sensor | |
| CN111735875B (en) | Device and method for measuring radial acoustic characteristics of rock core | |
| CN205192426U (en) | Round hole inner wall hoop strain meter | |
| CN107843176B (en) | Calibrating device for solid volume expansion measuring instrument | |
| CN211205361U (en) | In-situ test probe calibration detection device | |
| CN110424362B (en) | Optical fiber type temperature self-compensating static sounding sensor | |
| CN115184171B (en) | In-situ rock mass modulus measurement system and method | |
| CN208765764U (en) | A kind of test specimen inner wall measuring device | |
| CN214407284U (en) | Counter bore pitch-row measuring apparatu | |
| CN213838606U (en) | Drilling hole diameter measuring device | |
| CN102230787B (en) | Device for measuring depth of through hole |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |