WO2019080440A1 - Véritable dispositif de test triaxial et méthode de test pour échantillon de roche cuboïde - Google Patents

Véritable dispositif de test triaxial et méthode de test pour échantillon de roche cuboïde

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Publication number
WO2019080440A1
WO2019080440A1 PCT/CN2018/079589 CN2018079589W WO2019080440A1 WO 2019080440 A1 WO2019080440 A1 WO 2019080440A1 CN 2018079589 W CN2018079589 W CN 2018079589W WO 2019080440 A1 WO2019080440 A1 WO 2019080440A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressing head
sample
rectangular
rock sample
disposed
Prior art date
Application number
PCT/CN2018/079589
Other languages
English (en)
Chinese (zh)
Inventor
杨圣奇
田文岭
黄彦华
殷鹏飞
Original Assignee
中国矿业大学
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 中国矿业大学 filed Critical 中国矿业大学
Publication of WO2019080440A1 publication Critical patent/WO2019080440A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
    • G01N3/12—Pressure testing
    • 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
    • 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
    • G01N2203/003—Generation of the force
    • G01N2203/0042—Pneumatic or hydraulic means
    • G01N2203/0048—Hydraulic means

Definitions

  • the invention relates to the field of true triaxial compression mechanical behavior testing of rock, and particularly relates to a true triaxial test device and method for a rectangular parallelepiped rock sample.
  • the true triaxial compression test can independently apply the principal stresses in three directions, which can better reflect the true force characteristics of the rock in the formation, and thus can accurately predict the strength characteristics of the rock, which has attracted extensive attention from scholars, but The problem of loading boundary conditions, true triaxial tests are more difficult to seal and achieve.
  • the object of the present invention is to provide a true triaxial test device and method for a rectangular parallelepiped rock sample.
  • a true triaxial test device for a rectangular rock sample comprising an axial indenter and a lateral loading device, wherein:
  • the axial pressing head comprises an upper pressing head and a lower pressing head, wherein the upper pressing head and the lower pressing head are respectively disposed at upper and lower ends of the sample, and the upper pressing head comprises a circular portion and a square which are sequentially arranged from top to bottom. a part, the lower pressing head comprises a square portion, a circular portion and a threaded portion which are arranged in order from top to bottom;
  • the lateral loading device includes a pair of loading plates disposed on two sides of the sample, and two hydraulic plates are disposed on the outer sides of the two loading plates, and the reaction plates are disposed on the outer sides of the two hydraulic cylinders; A first displacement sensor is respectively disposed on the upper side.
  • a first sealing ring is disposed on the circular portion of the upper pressing head and the lower pressing head, and two second sealing rings are disposed on the square portion.
  • the edge of one side of the loading plate facing the sample is chamfered.
  • a pair of second displacement sensors are further disposed on the front and rear sides of the sample, and the lines connecting the two second displacement sensors and the lines connecting the two first displacement sensors are perpendicular to each other.
  • a true triaxial test method for a rectangular parallelepiped rock sample comprising the following steps:
  • the present invention adds a set of lateral hydraulic loading devices based on the surrounding pressure chamber of the conventional triaxial compression test, and supplements the special sealing method to realize the rock sample.
  • True triaxial loading Compared with other true three-axis equipment, the true triaxial test device is simple in operation, economical and has a good sealing effect.
  • Figure 1 is a schematic view of the structure of the present invention
  • Figure 2 is a plan view of the present invention
  • 1 is a true triaxial test device for a rectangular parallelepiped rock sample according to the present invention, comprising an axial indenter and a lateral loading device, wherein:
  • the axial pressing head comprises an upper pressing head 1 and a lower pressing head 2, respectively, wherein the upper pressing head 1 and the lower pressing head 2 are respectively disposed at upper and lower ends of the sample, and the upper pressing head comprises a circular portion arranged in order from top to bottom.
  • the square part, the main part of the square part is to fit the square end face of the rock sample to transmit uniform pressure, the circular part is the transfer between the square part and the upper end pressure chamber, the main function is to ensure the sealing of the sample;
  • the head includes a square portion, a circular portion and a threaded portion which are arranged in order from top to bottom.
  • the square portion mainly serves to conform to the square end surface of the rock sample to transmit uniform pressure, and the circular portion is the transfer of the square portion and the thread portion.
  • the main function is to ensure the sealing of the sample, the threaded part is used for fixing with the base of the three-axis pressure equipment; the first sealing ring 3 is arranged on the circular part of the upper pressing head 1 and the lower pressing head 2, and the sealing test is performed.
  • the role of the square portion is provided with two second sealing rings 4, which can be used for secondary protection when the first sealing ring 3 of the circular portion fails;
  • the lateral loading device comprises a pair of loading plates 6 disposed on both sides of the sample, and two hydraulic plates 7 are disposed on the outer sides of the two loading plates 6, and the reaction frames 8 are disposed on the outer sides of the two hydraulic cylinders 7;
  • Each of the loading plates 6 is respectively provided with a first displacement sensor 9; the edge of one side of the loading plate 6 facing the sample is chamfered, thereby avoiding contact with the upper pressing head 1 and the lower pressing head 2; the hydraulic cylinder 7 can The lateral expansion and contraction, together with the pressure provided by the external hydraulic source, can provide loading in the direction of the second principal stress ⁇ 2 of the sample; the two first displacement sensors 9 move with the movement of the loading plates 6 on both sides, and the loading process can be measured.
  • the lines connecting the two second displacement sensors 10 and the lines connecting the two first displacement sensors 9 are perpendicular to each other.
  • a true triaxial test method for a rectangular parallelepiped rock sample comprising the following steps:
  • the first displacement sensor 9 and the second displacement sensor 10 are installed and adjusted so that the two first displacement sensors 9 are located on the same plane, so that the two second displacement sensors 10 correspond to each other and are located on the same plane;
  • the strain in the axial direction (ie, the first principal stress ⁇ 1 ) is measured by the displacement of the upper and lower indenters, and the strain in the direction of the second principal stress ⁇ 2 is measured by the first displacement sensor 9 mounted on both sides of the loading plate, The strain in the direction of the three principal stress ⁇ 3 is measured by the third displacement sensor 10 mounted on the reaction frame 8.
  • the method simplifies the sealing procedure of the true triaxial sample and can reduce the friction in the direction of the third principal stress ⁇ 3 to some extent.

Abstract

Cette invention concerne un véritable dispositif de test triaxal et une méthode de test pour échantillon de roche cuboïde. Le dispositif de test comprend une tête de pression axiale et un dispositif de chargement latéral ; où la tête de pression axiale comprend une tête de pression supérieure (1) et une tête de pression inférieure (2), la tête de pression supérieure (1) et la tête de pression inférieure (2) sont respectivement utilisées de façon à être agencées aux extrémités supérieure et inférieure de l'échantillon à tester ; la tête de pression supérieure (1) comprend une partie circulaire et une partie carrée qui sont agencées en séquence de haut en bas ; et la tête de pression inférieure (2) comprend une partie carrée, une partie circulaire et une partie filetée qui sont agencées en séquence de haut en bas ; et le dispositif de chargement latéral comprend une paire de plaques de chargement (6) qui sont agencées des deux côtés de l'échantillon à tester ; un cylindre hydraulique (7) est agencé côté extérieur de chacune des deux plaques de chargement (6) ; des structures de réaction (8) sont disposées côtés extérieurs des deux cylindres hydrauliques (7) ; et un premier capteur de déplacement (9) est agencé sur chacune des deux plaques de chargement (6).Le dispositif et la méthode selon l'invention simplifient une procédure de scellage de l'échantillon pour un véritable test triaxial et permettent en même temps de réduire dans une certaine mesure une force de frottement dans le sens d'une troisième contrainte principale σ 3.
PCT/CN2018/079589 2017-10-23 2018-03-20 Véritable dispositif de test triaxial et méthode de test pour échantillon de roche cuboïde WO2019080440A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710991648.3A CN107741364A (zh) 2017-10-23 2017-10-23 一种长方体岩石试样真三轴试验装置及方法
CN201710991648.3 2017-10-23

Publications (1)

Publication Number Publication Date
WO2019080440A1 true WO2019080440A1 (fr) 2019-05-02

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Country Link
CN (1) CN107741364A (fr)
WO (1) WO2019080440A1 (fr)

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CN107741364A (zh) * 2017-10-23 2018-02-27 中国矿业大学 一种长方体岩石试样真三轴试验装置及方法
CN107764631B (zh) 2017-10-23 2019-04-05 中国矿业大学 一种含预制裂隙长方体岩石常规三轴试验的密封压头及试验方法
CN109632509B (zh) * 2019-01-14 2019-10-22 浙江大学 超重力真三轴岩石加载实验装置及方法
CN109946166A (zh) * 2019-03-22 2019-06-28 湘潭大学 一种岩石围压模拟装置
CN110095332B (zh) * 2019-03-22 2020-11-17 四川大学 一种三轴霍普金森压杆实验岩石试样密封方法及密封装置
CN110017763B (zh) * 2019-04-25 2021-04-09 黄河水利委员会黄河水利科学研究院 一种长方体试样的侧向变形测量系统
CN111198136A (zh) * 2020-02-17 2020-05-26 北京科技大学 一种岩体含冰裂缝网络冻胀扩展过程监测试验系统及方法
CN115656220A (zh) * 2022-11-11 2023-01-31 中国矿业大学 一种真三轴应力条件下实时微波破岩试验装置及其方法

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KR101727405B1 (ko) * 2015-10-28 2017-05-02 전북대학교산학협력단 Shpb 충격시험 전용 삼축 압축셀 및 이를 이용한 동적 삼축 전단 시험기법
CN105938070B (zh) * 2016-07-06 2019-05-03 山东大学 多功能真三轴岩石钻探测试系统及表征岩体特性的试验方法
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US3728895A (en) * 1970-12-18 1973-04-24 Trw Inc Triaxial compression test apparatus
CN102607958A (zh) * 2012-03-22 2012-07-25 长沙理工大学 一种路面半刚性基层材料三向独立加载试验方法及装置
CN103207114A (zh) * 2013-03-08 2013-07-17 山东科技大学 三向刚性加载岩石真三轴仪
CN104677815A (zh) * 2015-03-06 2015-06-03 西南石油大学 真三轴岩石参数测试系统
CN106404568A (zh) * 2016-10-26 2017-02-15 中国科学院武汉岩土力学研究所 可测量致密岩石气体渗透率的真/假三轴试验装置
CN107741364A (zh) * 2017-10-23 2018-02-27 中国矿业大学 一种长方体岩石试样真三轴试验装置及方法

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