CN112284901A - Pseudo-triaxial rock testing machine and using method thereof - Google Patents

Pseudo-triaxial rock testing machine and using method thereof Download PDF

Info

Publication number
CN112284901A
CN112284901A CN202011168940.3A CN202011168940A CN112284901A CN 112284901 A CN112284901 A CN 112284901A CN 202011168940 A CN202011168940 A CN 202011168940A CN 112284901 A CN112284901 A CN 112284901A
Authority
CN
China
Prior art keywords
bottom plate
top plate
rock
testing machine
test piece
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.)
Pending
Application number
CN202011168940.3A
Other languages
Chinese (zh)
Inventor
赵瑜
沈明轩
王超林
毕靖
杨再荣
宁麟
罗云凡
丁丁
党爽
都粲
连帅龙
刘朝美
黄彦森
王化俗
张坤鹏
郑坤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guizhou University
Original Assignee
Guizhou University
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 Guizhou University filed Critical Guizhou University
Priority to CN202011168940.3A priority Critical patent/CN112284901A/en
Publication of CN112284901A publication Critical patent/CN112284901A/en
Pending legal-status Critical Current

Links

Images

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
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/025—Geometry of the test
    • G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen

Landscapes

  • 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)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention provides a pseudo-triaxial rock testing machine and a use method thereof, wherein the testing machine comprises: a vertical pressurizing device and a confining pressure device; the vertical pressurizing device comprises a top plate, a bottom plate and 3 anchor rods, wherein the 3 anchor rods are vertically arranged, the upper parts of the anchor rods are connected with the top plate through nuts, and the lower parts of the anchor rods are connected with the bottom plate through nuts; the vertical pressurizing device is used for fixing the rock test piece to be tested between the top plate and the bottom plate; the confining pressure device comprises a steel mesh, a reverse buckling lock, a rotary table and a rotary shaft, one end of the steel mesh is connected to the rotary shaft, the other end of the steel mesh penetrates through the reverse buckling lock and is used for being attached to and covered on the surface of the rock test piece, and the rotary table is welded to the top of the rotary shaft. The testing machine is suitable for the pseudo-triaxial test of the cylindrical rock test piece, simple and reasonable in structural design and convenient to operate and use, so that the test is quicker and more efficient.

Description

Pseudo-triaxial rock testing machine and using method thereof
Technical Field
The invention belongs to the technical field of laboratory tests in constructional engineering, highway bridges and tunnel engineering, and particularly relates to a pseudo-triaxial rock testing machine and a using method thereof.
Background
In engineering construction, most engineering construction processes can meet rock masses, and rocks involve the problems of stability, safety and the like in engineering construction and engineering operation stages, so that mechanical properties of the rocks under different conditions, particularly the mechanical properties and destruction characteristics of the rocks under the action of three-dimensional confining pressure, need to be analyzed in most engineering construction, and the key effect is achieved on engineering construction and operation.
In mechanics, any object is subjected to forces from X, Y, Z in three directions, called major principal stress, median principal stress and minor principal stress, respectivelySymbol sigma1、σ2、σ3The existing rock three-way axial compression test equipment is complex in operation, large in equipment size, high in equipment cost, low in test efficiency and low in test speed, and the efficiency and the test cost of the three-way test are seriously influenced.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a pseudo-triaxial rock testing machine, which is suitable for pseudo-triaxial test of rock specimen, so that the rock cylindrical specimen is subjected to triaxial stress of σ1＞σ2＝σ3。
In order to achieve the purpose, the technical scheme of the invention is as follows: a pseudo-triaxial rock testing machine comprising: a vertical pressurizing device and a confining pressure device; wherein the content of the first and second substances,
the vertical pressurizing device comprises a top plate, a bottom plate and 3 anchor rods, wherein the 3 anchor rods are vertically arranged, the upper parts of the anchor rods are connected with the top plate through nuts, and the lower parts of the anchor rods are connected with the bottom plate through nuts; the vertical pressurizing device is used for fixing the rock test piece to be tested between the top plate and the bottom plate;
the confining pressure device comprises a steel mesh, a reverse buckling lock, a rotary table and a rotary shaft, one end of the steel mesh is connected to the rotary shaft, the other end of the steel mesh penetrates through the reverse buckling lock and is used for being attached to and covered on the surface of the rock test piece, and the rotary table is welded to the top of the rotary shaft.
Further, still including supporting the base, support the base and include base supporting leg and bed plate, supporting leg one end with bed plate fixed connection, the other end pass through the nut with bottom plate fixed connection.
Further, the bottom plate is a steel bottom plate, and the top plate is a steel top plate.
Further, the steel mesh is a light sheet woven by flexible high-strength steel strands.
In view of the above, the second object of the present invention is to provide a method for performing a triaxial stress test using the above-mentioned testing machine,
in order to achieve the purpose, the technical scheme of the invention is as follows: a method for carrying out a triaxial stress test by using the tester comprises the following steps:
tightly wrapping a rock test piece to be tested by a steel mesh, and placing the rock test piece to be tested between a top plate and a bottom plate;
adjusting a nut between the top plate and the anchor rod to enable the top plate to approach the bottom plate, and applying a vertical force to the rock test piece to be tested;
and rotating the turntable to enable the rotating shaft to pull the steel mesh to shrink so as to apply confining pressure to the rock test piece to be tested.
Further, the rock pattern to be detected is cylindrical.
Compared with the prior art, the invention has the following advantages:
the invention provides a pseudo-triaxial rock testing machine and a using method thereof1＞σ2＝σ3) The testing machine has simple and reasonable structural design and convenient operation and use, and can ensure that the triaxial stress borne by the rock cylindrical test piece is sigma1＞σ2＝σ3So that the test is faster and more efficient. The problems of complex operation of test equipment, huge equipment size, high equipment cost, low test efficiency and the like can be solved, the efficiency of test work can be greatly improved, and compared with the prior art, the cost is reduced, the device has the advantages of convenience in operation and use, low maintenance cost, high efficiency, difficulty in damage, long service life and reusability, has important application prospect and practical significance, and is suitable for popularization and use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive exercise.
FIG. 1 is a front view of a pseudo-triaxial rock testing machine of the present invention;
FIG. 2 is a schematic A-A diagram of a pseudo-triaxial rock testing machine according to the present invention;
FIG. 3 is a schematic structural diagram of a confining pressure device of the pseudo-triaxial rock testing machine.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The examples are given for the purpose of better illustration of the invention, but the invention is not limited to the examples. Therefore, those skilled in the art should make insubstantial modifications and adaptations to the embodiments of the present invention in light of the above teachings and remain within the scope of the invention.
Example 1
With reference to fig. 1-3, the present embodiment provides a pseudo-triaxial rock testing machine comprising: a vertical pressurizing device and a confining pressure device; wherein the content of the first and second substances,
the vertical pressurizing device comprises a top plate 112, a bottom plate 213 and 3 anchor rods 111, referring to fig. 1, the 3 anchor rods 111 are vertically arranged, the upper parts of the anchor rods are connected with the top plate 112 through screws 113a, and the lower parts of the anchor rods 111 are connected with the bottom plate 213 through nuts 113 b;
specifically, the top plate 112 in this embodiment is a steel top plate, the bottom plate 213 is a steel bottom plate, and other metal or alloy top plates or bottom plates may be selected at other times;
still further, the plane of the top plate 112 and the bottom plate 213 may be polygonal, such as quadrilateral, irregular polygon, etc., in a specific embodiment, the plane of the top plate 112 and the bottom plate 213 is in a triangle-like shape, 3 anchor rods 111 are fixed at three peripheral angular positions of the top plate 112 and the bottom plate 213 by nuts, and the vertical pressurizing device is used for fixing the rock test piece 100 to be tested between the top plate 112 and the bottom plate 213 and between the three anchor rods 111; the test platform is formed among the anchor rods 111, the steel top plate 112 and the steel bottom plate 213 and is used for placing the rock test piece 100 to be tested, and in other plane figures, the planes of the top plate 112 and the bottom plate 213 are parallel to the horizontal plane and are stable only when the bottom plate 213 is connected with the top plate 112 and the anchor rods 111 are vertically placed;
the confining pressure device comprises a steel mesh 311, a reverse buckling lock 312, a turntable 313 and a rotating shaft 314, referring to fig. 3, the steel mesh is a light sheet woven by flexible high-strength steel strands, one end of the steel mesh 311 is connected to the rotating shaft 314, the steel mesh 311 can be wound on the rotating shaft 314 for multiple circles so as to be suitable for rock test pieces of various sizes, the other end of the steel mesh 311 penetrates through the reverse buckling lock 312, the steel mesh 311 is used for being attached to and covering the side surface of the rock test piece 100, and the turntable 313 is welded to the top of the rotating shaft 314.
Preferably, the testing machine of the invention further comprises a supporting base, the supporting base is used for supporting the vertical pressurizing device, the supporting base comprises base supporting legs 211 and a base plate 212, one end of each supporting leg 211 is fixedly connected with the base plate 212, and the other end of each supporting leg 211 is fixedly connected with the bottom plate 213 through a nut 113 c;
in this embodiment, the support legs 211 may be connected to the bottom plate 213 at the periphery of the connection position of the anchor rods 111, and the base plates 212 may be plural for stably supporting the vertical pressurizing means;
in this embodiment, vertical pressure device, confined pressure device, support all can be dismantled and assemble fast between the base.
Example 2
Based on the pseudo-triaxial rock testing machine in embodiment 1, the present embodiment discloses a method for performing a triaxial stress test using the pseudo-triaxial rock testing machine, the method including the following steps:
s1: tightly wrapping the steel mesh on the rock test piece to be tested, and placing the rock test piece to be tested between the top plate and the bottom plate;
before use, selecting a proper rock sample to be tested, such as a cylinder, tightly wrapping the rock sample to be tested by using a steel mesh, and then placing the rock sample to be tested among the anchor rod, the steel top plate 112 and the steel bottom plate;
s2: adjusting a nut between the top plate and the anchor rod to enable the top plate to approach the bottom plate, and applying vertical force to the rock test piece to be tested;
in the embodiment, the top plate is connected with the adjusting nut to provide vertical pressure for the rock test piece, specifically, the bottom nut 113b is kept unchanged by rotating the top nut 113a, so that the top plate approaches the bottom plate 213 to generate vertical force, and thus, corresponding vertical force is applied to the test piece;
s3: and rotating the turntable to enable the rotating shaft to pull the steel mesh to shrink so as to apply confining pressure to the rock test piece to be tested.
In this step, confining pressure needs to be applied to the rock to be tested, the turntable is rotated to shrink the steel mesh, and thus confining pressure is applied to the rock test piece to be tested.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (7)

1. A pseudo-triaxial rock testing machine, comprising: a vertical pressurizing device and a confining pressure device; wherein the content of the first and second substances,
the vertical pressurizing device comprises a top plate, a bottom plate and 3 anchor rods, wherein the 3 anchor rods are vertically arranged, the upper parts of the anchor rods are connected with the top plate through nuts, and the lower parts of the anchor rods are connected with the bottom plate through nuts; the vertical pressurizing device is used for fixing the rock test piece to be tested between the top plate and the bottom plate;
the confining pressure device comprises a steel mesh, a reverse buckling lock, a rotary table and a rotary shaft, one end of the steel mesh is connected to the rotary shaft, the other end of the steel mesh penetrates through the reverse buckling lock and is used for being attached to and covered on the surface of the rock test piece, and the rotary table is welded to the top of the rotary shaft.
2. The testing machine of claim 1, further comprising a support base, wherein the support base comprises base support legs and a base plate, one end of each support leg is fixedly connected with the base plate, and the other end of each support leg is fixedly connected with the bottom plate through a nut.
3. The testing machine of claim 1, wherein the bottom plate is a steel bottom plate and the top plate is a steel top plate.
4. The testing machine of claim 1, wherein the steel mesh is a lightweight sheet woven from flexible steel strands.
5. The testing machine of claim 2, wherein the vertical pressurizing device, the confining pressure device and the support base are detachably connected.
6. A method for performing a triaxial stress test using a tester according to any of claims 1 to 5, comprising the steps of:
tightly wrapping a rock test piece to be tested by a steel mesh, and placing the rock test piece to be tested between a top plate and a bottom plate;
adjusting a nut between the top plate and the anchor rod to enable the top plate to approach the bottom plate, and applying a vertical force to the rock test piece to be tested;
and rotating the turntable to enable the rotating shaft to pull the steel mesh to shrink so as to apply confining pressure to the rock test piece to be tested.
7. The method of claim 6, wherein the rock pattern to be tested is cylindrical.
CN202011168940.3A 2020-10-28 2020-10-28 Pseudo-triaxial rock testing machine and using method thereof Pending CN112284901A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011168940.3A CN112284901A (en) 2020-10-28 2020-10-28 Pseudo-triaxial rock testing machine and using method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011168940.3A CN112284901A (en) 2020-10-28 2020-10-28 Pseudo-triaxial rock testing machine and using method thereof

Publications (1)

Publication Number Publication Date
CN112284901A true CN112284901A (en) 2021-01-29

Family

ID=74373467

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011168940.3A Pending CN112284901A (en) 2020-10-28 2020-10-28 Pseudo-triaxial rock testing machine and using method thereof

Country Status (1)

Country Link
CN (1) CN112284901A (en)

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1051984A (en) * 1989-11-20 1991-06-05 鲁道夫·赫尔工学博士股份公司 The apparatus and method of tensing record sheet material
JPH08338796A (en) * 1995-06-14 1996-12-24 Fuji P S:Kk Convenient method and system for triaxial compression test
CN1948945A (en) * 2006-10-24 2007-04-18 中国矿业大学(北京) Material flowing deformation disturbed effect testing system and testing method thereof
CN103439203A (en) * 2013-08-21 2013-12-11 国家电网公司 Testing method for dynamic characteristic of soft soil under action of circulation load
CN103604697A (en) * 2013-11-22 2014-02-26 山东大学 Fake triaxial creeping device and method for geotechnical engineering under uniform confining pressure
CN203561557U (en) * 2013-11-22 2014-04-23 山东大学 False triaxial creeping device under uniform confining pressure for geotechnical engineering
CN203785966U (en) * 2014-04-14 2014-08-20 北方燕盛工程技术有限公司 Portable rock triaxial compression tester
CN204389353U (en) * 2015-01-30 2015-06-10 湖南科技大学 A kind of temperature-seepage coupling test test specimen packoff
CN105334098A (en) * 2014-08-15 2016-02-17 葛洲坝集团试验检测有限公司 Sealing and fixing device of triaxial compression test for coarse-grained soil samples
CN105510013A (en) * 2015-12-09 2016-04-20 中国北方车辆研究所 Side force loading apparatus for hydro-pneumatic spring testing bench
WO2017128479A1 (en) * 2016-01-25 2017-08-03 中国矿业大学 Fully-automated system for testing gas permeability of rock and estimation method
CN107356484A (en) * 2017-08-28 2017-11-17 石家庄铁道大学 Sample sag apparatus for correcting and its application method in a kind of soil body triaxial tests instrument
CN110987667A (en) * 2019-12-09 2020-04-10 中南大学 Rock high-temperature shear test device and method suitable for split Hopkinson bar
CN110987626A (en) * 2019-12-27 2020-04-10 山东科技大学 Anchor rod drawing test device and method considering tray influence
CN111175162A (en) * 2019-03-22 2020-05-19 湘潭大学 Rock sample block single-side confining pressure applying device and confining pressure applying method

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1051984A (en) * 1989-11-20 1991-06-05 鲁道夫·赫尔工学博士股份公司 The apparatus and method of tensing record sheet material
JPH08338796A (en) * 1995-06-14 1996-12-24 Fuji P S:Kk Convenient method and system for triaxial compression test
CN1948945A (en) * 2006-10-24 2007-04-18 中国矿业大学(北京) Material flowing deformation disturbed effect testing system and testing method thereof
CN103439203A (en) * 2013-08-21 2013-12-11 国家电网公司 Testing method for dynamic characteristic of soft soil under action of circulation load
CN103604697A (en) * 2013-11-22 2014-02-26 山东大学 Fake triaxial creeping device and method for geotechnical engineering under uniform confining pressure
CN203561557U (en) * 2013-11-22 2014-04-23 山东大学 False triaxial creeping device under uniform confining pressure for geotechnical engineering
CN203785966U (en) * 2014-04-14 2014-08-20 北方燕盛工程技术有限公司 Portable rock triaxial compression tester
CN105334098A (en) * 2014-08-15 2016-02-17 葛洲坝集团试验检测有限公司 Sealing and fixing device of triaxial compression test for coarse-grained soil samples
CN204389353U (en) * 2015-01-30 2015-06-10 湖南科技大学 A kind of temperature-seepage coupling test test specimen packoff
CN105510013A (en) * 2015-12-09 2016-04-20 中国北方车辆研究所 Side force loading apparatus for hydro-pneumatic spring testing bench
WO2017128479A1 (en) * 2016-01-25 2017-08-03 中国矿业大学 Fully-automated system for testing gas permeability of rock and estimation method
CN107356484A (en) * 2017-08-28 2017-11-17 石家庄铁道大学 Sample sag apparatus for correcting and its application method in a kind of soil body triaxial tests instrument
CN111175162A (en) * 2019-03-22 2020-05-19 湘潭大学 Rock sample block single-side confining pressure applying device and confining pressure applying method
CN110987667A (en) * 2019-12-09 2020-04-10 中南大学 Rock high-temperature shear test device and method suitable for split Hopkinson bar
CN110987626A (en) * 2019-12-27 2020-04-10 山东科技大学 Anchor rod drawing test device and method considering tray influence

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
夏家南;梁彬;汤书明;朱俊高;: "土工布包裹对粗粒料三轴试验的影响研究" *

Similar Documents

Publication Publication Date Title
CN106644758B (en) Rock direct shear and point load test device and test operation method thereof
CN103234830B (en) Anchoring property experiment platform of anchor rod
CN101403645B (en) Hydraulic pressure and soil pressure independently loaded shield tunneling structure prototype experiment apparatus
CN110487647A (en) A kind of plain type falling weight impact test confining pressure loading device and experimental method
CN204269492U (en) A kind of shock vibration country rock testing equipment
CN112525466A (en) Metal mesh dynamic load test method and test stand
CN213121052U (en) Bed bottom plate impact tester
CN203561545U (en) Automatic test specimen sorting device of full-automatic tensile testing machine
CN112284901A (en) Pseudo-triaxial rock testing machine and using method thereof
CN110987626A (en) Anchor rod drawing test device and method considering tray influence
CN113607365A (en) Displacement-controlled wall body plane outer airbag loading test device and test method
CN101526434A (en) Creep test loader of concrete member
CN109540491B (en) Program spectrum loading device for fatigue test of excavator turntable
CN109668753B (en) Large-scale space node and typical structure multipurpose loading host
CN111127993A (en) Simplified reverse fault dislocation centrifugal simulation device
CN104634663B (en) The adjustable long-term pressurized tests device of self-balancing pin
CN203551354U (en) Adjustable concrete core sample filling-in device
CN102645328B (en) Corner test device for pressure tester
CN213749367U (en) Fixing device of test block of springback strength measurement curve
CN210571742U (en) Tunnel lining curved beam structure durability test loading device
CN210917490U (en) Double-inclined pull lever type foundation pile pressure test detection device with dissipation component force
CN112665995A (en) Parallel Hopkinson bar simulation instant unloading test device and method
CN216194989U (en) Bearing capacity detector for detecting foundation of building engineering
CN112834320B (en) Dry-wet cycle triaxial testing machine and use method thereof
CN218496623U (en) Concrete analysis device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination