CN105987848A - Rock tension creep experiment test instrument - Google Patents

Rock tension creep experiment test instrument Download PDF

Info

Publication number
CN105987848A
CN105987848A CN201610485397.7A CN201610485397A CN105987848A CN 105987848 A CN105987848 A CN 105987848A CN 201610485397 A CN201610485397 A CN 201610485397A CN 105987848 A CN105987848 A CN 105987848A
Authority
CN
China
Prior art keywords
pressue
rock
power source
test
jacking block
Prior art date
Application number
CN201610485397.7A
Other languages
Chinese (zh)
Inventor
赵娜
王来贵
习彦会
潘纪伟
赵国超
Original Assignee
辽宁工程技术大学
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 辽宁工程技术大学 filed Critical 辽宁工程技术大学
Priority to CN201610485397.7A priority Critical patent/CN105987848A/en
Publication of CN105987848A publication Critical patent/CN105987848A/en

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014Type of force applied
    • G01N2203/0016Tensile or compressive
    • G01N2203/0019Compressive
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058Kind of property studied
    • G01N2203/0069Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0071Creep

Abstract

The invention discloses a rock tension creep experiment test instrument. The rock tension creep experiment test instrument comprises a control cabinet, a creep test stand and a central computer, wherein the creep test stand comprises a vertical support, a Z-directional pressurizing device, an X-directional pressurizing device and a Y-directional pressurizing device; the Z-directional pressurizing device is fixed on the vertical support and stretches and retracts in the vertical direction; the X-directional pressurizing device and the Y-directional pressurizing device are vertical to each other and are connected to the horizontal plane; the Z-directional pressurizing device, the X-directional pressurizing device and the Y-directional pressurizing device are vertical to one another; the Z-directional pressurizing device, the X-directional pressurizing device and the Y-directional pressurizing device are provided with main infrared displacement sensors and angle sensors respectively; each of the X-directional pressurizing device, the Y-directional pressurizing device and the Z-directional pressurizing device comprises a pressurizing power source, a retractable shaft and an ejection block, which are connected in sequence; and a tested rock is arranged on the Z-directional ejection block, and the X-directional ejection block, the Y-directional ejection block and the Z-directional ejection block are used for tightly pressing the tested rock at the same time. The experiment test instrument disclosed by the invention meets researches of rock tension creep experiments and the precision of a rock tension creep experiment test is improved.

Description

A kind of rock tension creep test test instrunment

Technical field

The present invention relates to rock tension creep test technical field of measurement and test, particularly relate to a kind of rock tension creep test test instrunment 。

Background technology

The failure mode of rock includes, pulls open bad and breaks bad.Rock resistance to compression not tension own, pulls open the bad stability often controlling rock mass engineering project entirety.Existing rock tension destruction and creep rupture experiment are mainly realized by forcing press, industrially, the creep of rock is tested by existing three axle creep of rock testers, thus meets the creep of rock test in commercial Application, but is not specifically designed for the experimental apparatus of tension creep rupture.On this basis, the special experimental apparatus measured for the rock tension deformation of creep is designed.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the invention provides prior art and be not specifically designed for the experimental apparatus that the tension deformation of creep measures, predominantly pressure cuts the determining instrument of creep.The present invention The creep of rock experiment instrument that a kind of measuring accuracy of major design is higher, meets the research that creep of rock is tested by scientific research institutions, school, enterprise etc., improves the precision of creep of rock experiment test.

The technical solution adopted in the present invention is: a kind of rock tension creep test test instrunment, including switch board, creep experiment platform and central computer, creep experiment platform includes that vertical bearing, Z-direction pressue device, X are to pressue device and Y-direction pressue device, Z-direction pressue device is fixed on vertical bearing and vertically stretches, X connects in the horizontal plane mutual vertically to pressue device and Y-direction pressue device, and Z-direction pressue device, X are mutually perpendicular to pressue device and Y-direction pressue device;Z-direction pressue device, X are respectively equipped with main infrared displacement sensor and angular transducer, infrared displacement sensor and angular transducer to pressue device and Y-direction pressue device and are both connected on central computer;Z-direction pressue device includes Z-direction pressurization power source, Z-direction telescopic shaft and the Z-direction jacking block being sequentially connected with, X to pressue device include the X being sequentially connected with to pressurization power source, X to telescopic shaft and X to jacking block, Y-direction pressue device includes Y-direction pressurization power source, Y-direction telescopic shaft and the Y-direction jacking block being sequentially connected with, it is test for rock to be placed on Z-direction jacking block, and X compresses to jacking block and Y-direction jacking block and Z-direction jacking block simultaneously and is test for rock.The rock tension creep test test instrunment of the present invention, to be test for above the Z-direction pressue device that rock is placed in above vertical bearing, meanwhile, in the horizontal direction being test for rock, it is additionally provided with the X being mutually perpendicular to and being perpendicular to Z-direction to simulate to pressue device and Y-direction pressue device simultaneously rock is pressurizeed, realize the imitation to creep of rock stress, and it is equipped with the displacement to the direction and the main infrared displacement sensor of angular surveying and angular transducer on each pressue device, it is achieved thereby that to creep of rock measuring measurement, it is easy to it analyze.

Further, the Z-direction jacking block of Z-direction pressue device is enclosed within the end of Z-direction telescopic shaft regularly, and Z-direction pressurization power source drives Z-direction telescopic shaft to stretch, thus realizes being test for rock pressurization;X is enclosed within the X end to telescopic shaft to the X of pressue device regularly to jacking block, and X drives X to stretch to telescopic shaft to pressurization power source, thus realizes being test for rock pressurization;The Y-direction jacking block of Y-direction pressue device is enclosed within the end of Y-direction telescopic shaft regularly, and Y-direction pressurization power source drives Y-direction telescopic shaft to stretch, thus realizes being test for rock pressurization.

Further, Z-direction pressue device, X include the pressue device unit of two relative symmetry respectively to pressue device and Y-direction pressue device, being respectively equipped with independent length-measuring appliance on two symmetrical pressue device unit, each length-measuring appliance obtains it to deserved displacement.

Further, the top of the Z-direction jacking block of Z-direction pressue device is provided with to low groove, is test for rock and inserts groove.

Further, each length-measuring appliance is fixed on the jacking block of its correspondence towards on the direction of pressurization power source, and institute's length-measuring appliance is infrared displacement sensor.

Further, each length-measuring appliance is fixed on the telescopic shaft of its correspondence, length-measuring appliance be micrometer measurement structure, i.e. telescopic shaft be located towards pressurize power source side be provided with thousand points of metering scales.

Further, two symmetrical pressue device unit are respectively equipped with independent pressurization power source, its displacement obtained or offset variable be transferred to independently central computer, i.e. central computer calculate be test for the displacement of rock time, obtain six displacements simultaneously.

Further, Z-direction pressurization power source, X connect switch board respectively to pressurization power source and Y-direction pressurization power source, and switch board is provided with the control knob of each pressurization power source corresponding, the loading force size of the pressurization power source that each control knob controller is corresponding;Setting Z-direction is just straight up, is negative straight down, and Y-direction is forward negative sense, is forward backward, and X is forward to the right, is negative sense to the left, then control knob at least includes that X is to, Y-direction and the positively and negatively control knob of Z-direction.

Further, Z-direction pressurization power source, X are servomotor or servo hydraulic cylinder or servo cylinder to pressurization power source and Y-direction pressurization power source.

Compared with prior art, the invention has the beneficial effects as follows: the rock tension creep test test instrunment of the present invention, to be test for above the Z-direction pressue device that rock is placed in above vertical bearing, meanwhile, in the horizontal direction being test for rock, it is additionally provided with the X being mutually perpendicular to and being perpendicular to Z-direction to simulate to pressue device and Y-direction pressue device simultaneously rock is pressurizeed, realize the imitation to creep of rock stress, and it is equipped with the displacement to the direction and the main infrared displacement sensor of angular surveying and angular transducer on each pressue device, it is achieved thereby that to creep of rock measuring measurement, it is easy to it analyze. And then meet the rock tension creep application in experimental technique field, there is bigger researching value and economic worth.

Accompanying drawing explanation

Fig. 1 is the top view structural representation of an embodiment of a kind of rock tension creep test test instrunment;

Fig. 2 is the front view of the embodiment of Fig. 1;

Wherein:

1-switch board, 2-creep experiment platform, 3-central computer, the vertical bearing of 4-, 5-Z-direction pressue device, 51-Z is to pressurization power source, 52-Z-direction telescopic shaft, and 53-Z is to jacking block, 531-groove, 6-X is to pressue device, and 61-X is to pressurization power source, and 62-X is to telescopic shaft, and 63-X is to jacking block;7-Y is to pressue device, and 71-Y is to pressurization power source, and 72-Y-direction telescopic shaft, 73-Y is to jacking block;The main infrared displacement sensor of 8-, 9-angular transducer, 10-control knob, 11-is test for rock, 12-length-measuring appliance.

Detailed description of the invention

In order to deepen the understanding of the present invention, the present invention is further described with embodiment below in conjunction with the accompanying drawings, and this embodiment is only used for explaining the present invention, does not constitute protection scope of the present invention and limits.

As shown in Figure 1, a kind of rock tension creep test test instrunment, including switch board 1, creep experiment platform 2 and central computer 3, creep experiment platform 2 includes that vertical bearing 4, Z-direction pressue device 5, X are to pressue device 6 and Y-direction pressue device 7, Z-direction pressue device 5 is fixed on vertical bearing 4 and vertically stretches, X connects in the horizontal plane mutual vertically to pressue device 6 and Y-direction pressue device 7, and Z-direction pressue device 5, X are mutually perpendicular to pressue device 6 and Y-direction pressue device 7;Z-direction pressue device 5, X are respectively equipped with main infrared displacement sensor 8 and angular transducer 9, infrared displacement sensor 8 and angular transducer 9 to pressue device 6 and Y-direction pressue device 7 and are both connected on central computer 3;Z-direction pressue device 5 includes Z-direction pressurization power source 51, Z-direction telescopic shaft 52 and the Z-direction jacking block 53 being sequentially connected with, X to pressue device 6 include the X being sequentially connected with to pressurization power source 61, X to telescopic shaft 62 and X to jacking block 63, Y-direction pressue device 7 includes Y-direction pressurization power source 71, Y-direction telescopic shaft 72 and the Y-direction jacking block 73 being sequentially connected with, it is test for rock 11 to be placed on Z-direction jacking block 53, and X compresses with Z-direction jacking block 53 to jacking block 63 and Y-direction jacking block 73 simultaneously and is test for rock 11.

In the above-described embodiments, the Z-direction jacking block 53 of Z-direction pressue device 5 is enclosed within the end of Z-direction telescopic shaft 52 regularly, and Z-direction pressurization power source 51 drives Z-direction telescopic shaft 52 to stretch, thus realizes pressurizeing to being test for rock 11;X is enclosed within the X end to telescopic shaft 62 to the X of pressue device 6 regularly to jacking block 63, and X drives X to stretch to telescopic shaft 62 to pressurization power source 61, thus realizes pressurizeing to being test for rock 11;The Y-direction jacking block 73 of Y-direction pressue device 7 is enclosed within the end of Y-direction telescopic shaft 72 regularly, and Y-direction pressurization power source 71 drives Y-direction telescopic shaft 72 to stretch, thus realizes pressurizeing to being test for rock 11.The setting of said structure makes tri-directions of X, Y, X being test for rock simultaneously to being pressurizeed, and the length displacement obtained and angle displacement are conveyed directly to central computer by infrared displacement sensor and angle displacement sensor and calculate, and precision is higher.

In the above-described embodiments, as depicted in figs. 1 and 2, Z-direction pressue device 5, X includes the pressue device unit of two relative symmetry respectively to pressue device 6 and Y-direction pressue device 7, it is respectively equipped with independent length-measuring appliance 12 on two symmetrical pressue device unit, each length-measuring appliance 12 obtains it to deserved displacement, pressue device is made to become six direction from three directions, the displacement in the most same direction can obtain two displacement datas simultaneously, after acquiring this displacement data, central computer is according to length-measuring error computational methods, it is calculated or direct weighted average, obtain the most accurate creeping displacement data, creep to rock has more in-depth study.

In fig. 2 it can also be seen that the top of the Z-direction jacking block 53 of Z-direction pressue device 5 is provided with to low groove 531, being test for rock 11 and insert groove 531, directly the action of gravity by rock is fixed, simple and convenient.

In the above-described embodiments, each length-measuring appliance 12 is fixed on the jacking block of its correspondence towards on the direction of pressurization power source, and institute's length-measuring appliance 12 be infrared displacement sensor, has higher automaticity, and saves the calculating time, raising conventional efficient.

In the above-described embodiments, directly each length-measuring appliance 12 can also be fixed on the telescopic shaft of its correspondence, length-measuring appliance 12 is micrometer measurement structure, i.e. telescopic shaft is located towards pressurization power source side and is provided with thousand points of metering scales, each time during creep, thousand points of metering scales change tables of artificial reading so that experimental apparatus more intuitive and convenient.

In the above-described embodiments, two symmetrical pressue device unit are respectively equipped with independent pressurization power source, and its displacement obtained or offset variable are transferred to central computer 3, i.e. central computer 3 independently when calculating the displacement being test for rock 11, obtaining six displacements, precision is higher simultaneously.

In the above-described embodiments, Z-direction pressurization power source 51, X connect switch board 1 respectively to pressurization power source 61 and Y-direction pressurization power source 71, switch board 1 is provided with the control knob 10 of each pressurization power source corresponding, the loading force size of the pressurization power source that each control knob 10 controller is corresponding;Setting Z-direction is just straight up, i.e. Z+, is negative straight down, i.e. Z-, and Y-direction is forward negative sense, i.e. Y-, is forward, i.e. Y+ backward, and X is forward to the right, i.e. X+, is negative sense, i.e. X-to the left, then control knob 10 at least includes that X is to, Y-direction and the positively and negatively control knob of Z-direction.Z-direction pressurization power source 51, X are servomotor or servo hydraulic cylinder or servo cylinder to pressurization power source 61 and Y-direction pressurization power source 71.

The rock tension creep test test instrunment of the present invention, meets the research that creep of rock is tested by scientific research institutions, school, enterprise etc., improves the precision of creep of rock experiment test.

What embodiments of the invention were announced is preferred embodiment, but is not limited thereto, those of ordinary skill in the art; easily according to above-described embodiment, understand the spirit of the present invention, and make different amplifications and change; but as long as without departing from the spirit of the present invention, the most within the scope of the present invention.

Claims (9)

1. a rock tension creep test test instrunment, including switch board (1), creep experiment platform (2) and central computer (3), it is characterized in that: described creep experiment platform (2) includes vertical bearing (4), Z-direction pressue device (5), X is to pressue device (6) and Y-direction pressue device (7), it is upper the most flexible that described Z-direction pressue device (5) is fixed on vertical bearing (4), described X connects in the horizontal plane mutual vertically to pressue device (6) and Y-direction pressue device (7), and Z-direction pressue device (5), X is mutually perpendicular to pressue device (6) and Y-direction pressue device (7);
Described Z-direction pressue device (5), X are respectively equipped with main infrared displacement sensor (8) and angular transducer (9), described infrared displacement sensor (8) and angular transducer (9) to pressue device (6) and Y-direction pressue device (7) and are both connected on central computer (3);
Described Z-direction pressue device (5) includes Z-direction pressurization power source (51) being sequentially connected with, Z-direction telescopic shaft (52) and Z-direction jacking block (53), to pressue device (6), described X includes that the X being sequentially connected with is to pressurization power source (61), X to telescopic shaft (62) and X to jacking block (63), described Y-direction pressue device (7) includes Y-direction pressurization power source (71) being sequentially connected with, Y-direction telescopic shaft (72) and Y-direction jacking block (73), it is test for rock (11) to be placed on Z-direction jacking block (53), and X compresses to jacking block (63) and Y-direction jacking block (73) and Z-direction jacking block (53) and is test for rock (11) simultaneously.
A kind of rock tension creep test test instrunment the most according to claim 1, it is characterized in that: the Z-direction jacking block (53) of Z-direction pressue device (5) is enclosed within the end of Z-direction telescopic shaft (52) regularly, Z-direction pressurization power source (51) drives Z-direction telescopic shaft (52) to stretch, thus realizes being test for rock (11) pressurization;
X is enclosed within the X end to telescopic shaft (62) to the X of pressue device (6) regularly to jacking block (63), and X drives X to stretch to telescopic shaft (62) to pressurization power source (61), thus realizes being test for rock (11) pressurization;
The Y-direction jacking block (73) of Y-direction pressue device (7) is enclosed within the end of Y-direction telescopic shaft (72) regularly, and Y-direction pressurization power source (71) drives Y-direction telescopic shaft (72) to stretch, thus realizes being test for rock (11) pressurization.
A kind of rock tension creep test test instrunment the most according to claim 2, it is characterized in that: described Z-direction pressue device (5), X include the pressue device unit of two relative symmetry respectively to pressue device (6) and Y-direction pressue device (7), being respectively equipped with independent length-measuring appliance (12) on two symmetrical pressue device unit, each described length-measuring appliance (12) obtains it to deserved displacement.
A kind of rock tension creep test test instrunment the most according to claim 2, it is characterised in that: the top of the Z-direction jacking block (53) of described Z-direction pressue device (5) is provided with to low groove (531), is test for rock (11) and inserts groove (531).
A kind of rock tension creep test test instrunment the most according to claim 3, it is characterized in that: each described length-measuring appliance (12) is fixed on the jacking block of its correspondence towards on the direction of pressurization power source, and institute's length-measuring appliance (12) is infrared displacement sensor.
A kind of rock tension creep test test instrunment the most according to claim 3, it is characterized in that: each described length-measuring appliance (12) is fixed on the telescopic shaft of its correspondence, described length-measuring appliance (12) is micrometer measurement structure, and the most described telescopic shaft is located towards pressurization power source side and is provided with thousand points of metering scales.
A kind of rock tension creep test test instrunment the most according to claim 3, it is characterized in that: two symmetrical pressue device unit are respectively equipped with independent pressurization power source, its displacement obtained or offset variable are transferred to central computer (3) independently, i.e. central computer (3) is when calculating is test for the displacement of rock (11), obtains six displacements simultaneously.
A kind of rock tension creep test test instrunment the most according to claim 7, it is characterized in that: Z-direction pressurization power source (51), X connect switch board (1) respectively to pressurization power source (61) and Y-direction pressurization power source (71), described switch board (1) is provided with the control knob (10) of each pressurization power source corresponding, the loading force size of the pressurization power source that each control knob (10) controller is corresponding;
Setting Z-direction is just straight up, is negative straight down, and Y-direction is forward negative sense, is forward backward, and X is forward to the right, is negative sense to the left, then control knob (10) at least includes that X is to, Y-direction and the positively and negatively control knob of Z-direction.
A kind of rock tension creep test test instrunment the most according to claim 7, it is characterised in that:
Z-direction pressurization power source (51), X are servomotor or servo hydraulic cylinder or servo cylinder to pressurization power source (61) and the Y-direction power source (71) that pressurizes.
CN201610485397.7A 2016-06-28 2016-06-28 Rock tension creep experiment test instrument CN105987848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610485397.7A CN105987848A (en) 2016-06-28 2016-06-28 Rock tension creep experiment test instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610485397.7A CN105987848A (en) 2016-06-28 2016-06-28 Rock tension creep experiment test instrument

Publications (1)

Publication Number Publication Date
CN105987848A true CN105987848A (en) 2016-10-05

Family

ID=57044639

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610485397.7A CN105987848A (en) 2016-06-28 2016-06-28 Rock tension creep experiment test instrument

Country Status (1)

Country Link
CN (1) CN105987848A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1262332A1 (en) * 1985-04-09 1986-10-07 Всесоюзный научно-исследовательский институт гидрогеологии и инженерной геологии Device for testing specimens of rock with triaxial compression
CN101699257A (en) * 2009-10-28 2010-04-28 河海大学 Planar and lateral strain controlled triaxial apparatus
CN102607946A (en) * 2012-02-28 2012-07-25 武汉大学 Device for large-scale true tri-axial test of original grading rockfill body and use method of method
CN103149101A (en) * 2013-02-28 2013-06-12 西安理工大学 Multifunctional triaxial creep testing machine with soil body pulling, pressing, twisting and shearing functions
WO2013143152A1 (en) * 2012-03-31 2013-10-03 中国矿业大学(北京) Simulated impact-type rock burst experiment apparatus
CN103822830A (en) * 2014-03-12 2014-05-28 中国水电顾问集团中南勘测设计研究院有限公司 Loading system for rock true triaxial tests
CN104655491A (en) * 2015-02-13 2015-05-27 郑州大学 Three-directional mechanical test platform

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1262332A1 (en) * 1985-04-09 1986-10-07 Всесоюзный научно-исследовательский институт гидрогеологии и инженерной геологии Device for testing specimens of rock with triaxial compression
CN101699257A (en) * 2009-10-28 2010-04-28 河海大学 Planar and lateral strain controlled triaxial apparatus
CN102607946A (en) * 2012-02-28 2012-07-25 武汉大学 Device for large-scale true tri-axial test of original grading rockfill body and use method of method
WO2013143152A1 (en) * 2012-03-31 2013-10-03 中国矿业大学(北京) Simulated impact-type rock burst experiment apparatus
CN103149101A (en) * 2013-02-28 2013-06-12 西安理工大学 Multifunctional triaxial creep testing machine with soil body pulling, pressing, twisting and shearing functions
CN103822830A (en) * 2014-03-12 2014-05-28 中国水电顾问集团中南勘测设计研究院有限公司 Loading system for rock true triaxial tests
CN104655491A (en) * 2015-02-13 2015-05-27 郑州大学 Three-directional mechanical test platform

Similar Documents

Publication Publication Date Title
CN103969107B (en) High pressure servo moves true triaxial test machine
JP5496421B2 (en) Apparatus and test method for static characteristics of full load of bolt joint surface unit
CN102866032B (en) similar material simulation test system
CN206670883U (en) A kind of oscillating load acts on slope stability test system
CN103954860B (en) A kind of testing tool for touch control device function and performance
CN202661240U (en) Testing device for detecting performance of mattress
CN204359338U (en) A kind of laser range sensor marking apparatus
CN105954103B (en) Ground surface material stretching, compression, curved drawing modulus of resilience synchronous testing device and method
CN103487315A (en) Testing device for mechanical property of material
CN101699257B (en) Planar and lateral strain controlled triaxial apparatus
CN104535335B (en) A kind of Multi-axial Loading axle assembly long duration test stand
CN103398807A (en) Novel three dimensional stress measuring sensor
CN202533020U (en) Automotive glass detection device
CN104458072B (en) A kind of test structure of comb capacitance type MEMS micro-stress beam gradient
CN102692319B (en) Passive follow-up force-applied linear guiderail pair test bed with controllable load
CN102435508B (en) White car body static stiffness restriction device and static stiffness detection method
CN204423753U (en) A kind of intersecting chord theorem inference teaching aid
CN204951215U (en) Artificial tooth degree of polymerization dipperstick
CN103983516B (en) Method for measuring and calculating poisson ratio of soil body
CN203705554U (en) Resistance measuring device
CN103148822A (en) Multipoint thickness measuring device and usage method thereof
CN206038427U (en) Pavement material drawing, compression, curved modulus of resilience synchronous test device that draws
CN203534380U (en) Detection structure for vehicle anti-collision beam
CN203203740U (en) Strain type three-dimensional force sensor
CN204228505U (en) A kind of New Rock mechanics machine

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20161005