CN105258829A - Underground engineering model test internal space stress measuring device and method - Google Patents

Underground engineering model test internal space stress measuring device and method Download PDF

Info

Publication number
CN105258829A
CN105258829A CN201510793814.XA CN201510793814A CN105258829A CN 105258829 A CN105258829 A CN 105258829A CN 201510793814 A CN201510793814 A CN 201510793814A CN 105258829 A CN105258829 A CN 105258829A
Authority
CN
China
Prior art keywords
stress
analysis module
strain
model
inner space
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
CN201510793814.XA
Other languages
Chinese (zh)
Inventor
陈坤福
靖洪文
涂小兵
吴顺涛
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.)
China University of Mining and Technology CUMT
Original Assignee
China University of Mining and Technology CUMT
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 China University of Mining and Technology CUMT filed Critical China University of Mining and Technology CUMT
Priority to CN201510793814.XA priority Critical patent/CN105258829A/en
Publication of CN105258829A publication Critical patent/CN105258829A/en
Pending legal-status Critical Current

Links

Landscapes

  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The invention relates to an internal space stress measuring device and method, in particular, an underground engineering model test internal space stress measuring device and method. The measuring device comprises a unit stress gauge, a strain acquisition instrument and an analysis module; the unit stress gauge includes resistance strain gauges and a similar unit block; three resistance strain gauges are pasted respectively on three diagonally-adjacent surfaces of the similar unit block; the similar unit block is designed according to the mechanical properties of similar materials and matching requirements; the elastic modulus of the similar unit block is equivalent to the elastic modulus of the material of a model; the analysis module programmed by the MATALAB is utilized to automatically lead in data acquired by the strain acquisition instrument, and then, six stress components of which the loading directions are perpendicular or parallel to each other and the magnitudes and directions of main stresses can be directly displayed, and stress components in any directions can be outputted, and therefore, measurement of the internal space stress state of the model and real-time monitoring of stress change in a test loading process can be realized. The device of the invention has the advantages of simple structure, convenient installation and testing and high accuracy, and can be widely used in model tests.

Description

Underground project model test inner space stress measurement device and method
Technical field
The present invention relates to a kind of internal stress measurement mechanism and method, especially a kind of underground project model test inner space stress measurement device and method.
Background technology
At present, the method that the stress state obtaining model test inside often adopts is that pressure cell, strain brick etc. are imbedded in inside, and pressure cell can only survey the pressure in certain direction, can't resolve complicated space stress problem.Although strain brick can stress on indirect inspection different directions, but off size reason etc. that is comparatively obvious with the rigidity difference between cast material due to sensor material and embedded-type sensor, directly affects the degree of accuracy that it is measured, especially after traditional measuring method directly cannot obtain inner space excavation, principle stress in country rock not parallel with loading direction or vertical time stress state, limit its application in three-dimensional stereo model.
Summary of the invention
Goal of the invention: the object of the invention is the weak point overcoming existing measuring method, a kind of underground project model test inner space stress measurement device and method are provided, realize the real-time monitoring to STRESS VARIATION in the measurement of model inner space stress state and test loading procedure.
Technical scheme: in order to realize foregoing invention object, technical scheme of the present invention is: monitoring underground project model test inner space stress comprises measurement mechanism and measuring method in real time:
Measurement mechanism comprises: element stress meter, strain acquirement instrument and analysis module; Element stress meter, strain acquirement instrument and analysis module are linked in sequence; Described element stress meter is made up of resistance strain gage and similar units block; Described similar units block adopts the polyurethane suitable with cast material elastic modulus to be made; Three resistance strain gages are pasted in three faces adjacent at the diagonal angle of similar units block respectively, and wherein the direction of two foil gauges is orthogonal, another strainometer and the first two angle at 45 °; Strain value on described strain acquirement instrument collecting unit taseometer; Described analysis module is the software for calculation utilizing Matalab to work out.
Described element stress meter is embedded in model close beta point; The Detection Information that element stress meter obtains imports analysis module by strain acquirement instrument, and display model inner space directly perceived stress state on analysis module, described stress state comprises the components of stress of principle stress size and Orientation, any direction.
Measuring method is: element stress meter obtains ε by three orthogonal directions foil gauges x, ε y, ε z, survey the ε obtained xy (45 °), ε yz (45 °), ε zx (45 °)and ε x, ε y, ε zcalculate shearing strain γ xy, γ yz, γ xz, according to ε x, ε y, ε zand γ xy, γ yz, γ xzsix components of strain can solve σ x, σ y, σ z, τ xy, τ yz, τ zxsix components of stress, and then solve the size and Orientation of three principle stresses, obtain the space stress state of test point;
Utilize Matalab software for calculation that whole computation process is compiled into analysis module, the computing method of analysis module: to the data analysis process gathered in the data importing pretreatment module first gathered by strain acquirement instrument, to judge whether data have reliability; The data importing stress processed is solved module, solves the components of stress of loading direction and the size and Orientation of principle stress; Again the size and Orientation of principle stress is imported stress state analysis module, solve the stress state on any direction; Realization is to the real-time monitoring of STRESS VARIATION in the measurement of model inner space stress state and test loading procedure.
Beneficial effect, owing to have employed such scheme, after the data importing that strainmeter gathers by the analysis module utilizing Matalab to work out, can direct display model inner space stress state, comprise the components of stress etc. of principle stress size and Orientation, any direction, realize the real-time monitoring to STRESS VARIATION in the measurement of model inner space stress state and test loading procedure.Overcome the problems such as the off size reason of sensor material and embedded-type sensor too large with the rigidity difference between cast material, the making material of described similar units block has high strength, the advantages such as good springiness, and the elastic modulus of elastic modulus and cast material is suitable, achieve the real-time monitoring to STRESS VARIATION in the measurement of model inner space stress state and test loading procedure, for monitoring and test the space stress state of resemble simulation test inside, especially the STRESS VARIATION situation of country rock inside in underground project model test, comprise the components of stress and the principle stress size of any direction, direction etc.
Advantage: structure simple structure of the present invention, installation and checkout is convenient, and has higher degree of accuracy, can be widely used in model test.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is analysis module process flow diagram of the present invention.
In figure: 1, the first foil gauge; 2, the second foil gauge; 3, the 3rd foil gauge; 4, the 4th foil gauge; 5, the 5th foil gauge; 6, the 6th foil gauge; 7, the 7th foil gauge; 8, the 8th foil gauge; 9, the 9th foil gauge.
Embodiment
Real-time monitoring underground project model test inner space stress comprises measurement mechanism and measuring method:
Measurement mechanism comprises: element stress meter, strain acquirement instrument and analysis module; Element stress meter, strain acquirement instrument and analysis module are linked in sequence; Described element stress meter is made up of resistance strain gage and similar units block (10mm × 10mm × 10mm); Described resistance strain gage specification is B × 120-3CA (grid length × grid width=3 × 2mm), can be buied by market; Described similar units block adopts the polyurethane suitable with cast material elastic modulus to be made; Three resistance strain gages are pasted in three faces adjacent at the diagonal angle of similar units block respectively, and wherein the direction of two foil gauges is orthogonal, another strainometer and the first two angle at 45 ° (as shown in Figure 1); Strain value on described strain acquirement instrument collecting unit taseometer; Described analysis module is the software for calculation utilizing Matalab to work out.
Described element stress meter is embedded in test point needed for model inside; The Detection Information that element stress meter obtains imports analysis module by strain acquirement instrument, and display model inner space directly perceived stress state on analysis module, described stress state comprises the components of stress of principle stress size and Orientation, any direction.
Described similar units block is according to the mechanical characteristic of analog material and coupling requirement, employing polyurethane designs and produces, it has the advantages such as high strength, good springiness, elastic modulus be controlled, can experimentally need to select the material suitable with cast material elastic modulus to test.Similar units block, when unit size is enough little, can be similar to the mean stress situation thought and represent in certain tangent stress or zonule, considers the paster requirement of foil gauge, similar units block be designed and sized to 10mm × 10mm × 10mm.
Measuring method is: element stress meter obtains ε by three orthogonal directions foil gauges x, ε y, ε z, survey the ε obtained xy (45 °), ε yz (45 °), ε zx (45 °)and ε x, ε y, ε zcalculate shearing strain γ xy, γ yz, γ xz, according to ε x, ε y, ε zand γ xy, γ yz, γ xzsix components of strain can solve σ x, σ y, σ z, τ xy, τ yz, τ zxsix components of stress, and then solve the size and Orientation of three principle stresses, obtain the space stress state of test point;
Utilize Matalab software for calculation that whole computation process is compiled into analysis module, the computing method of analysis module: to the data analysis process gathered in the data importing pretreatment module first gathered by strain acquirement instrument, to judge whether data have reliability; The data importing stress processed is solved module, solves the components of stress of loading direction and the size and Orientation of principle stress; Again the size and Orientation of principle stress is imported stress state analysis module, solve the stress state on any direction; Realization is to the real-time monitoring of STRESS VARIATION in the measurement of model inner space stress state and test loading procedure.
Below in conjunction with accompanying drawing, the present invention is further described.
The present invention is made up of element stress meter, strain acquirement instrument 10 and analysis module three parts.Element stress meter is made up of resistance strain gage and similar units block (10mm × 10mm × 10mm).Described resistance strain gage specification is B × 120-3CA (grid length × grid width=3 × 2mm), can be buied by market; Described similar units block adopts the polyurethane suitable with cast material elastic modulus to be made; Three resistance strain gages are pasted in three faces adjacent at the diagonal angle of similar units block respectively, and wherein the direction of two foil gauges is orthogonal, and another strainometer and the first two angle at 45 ° are as shown in Figure 1.Wherein, the first foil gauge 1, the 3rd foil gauge 3, the 6th foil gauge 6 are respectively used to measure ε x, ε y, ε z, the 7th foil gauge 7, the 4th foil gauge 4, the 9th foil gauge 9 are for checking, and the second foil gauge 2, the 5th foil gauge 5, the 8th foil gauge 8 are respectively used to measure ε xy (45 °), ε yz (45 °), ε zx (45 °).Be connected on strain acquirement instrument by these 9 foil gauges, the pretreatment module that the data importing of collection is worked out to Matalab is carried out analyzing and processing to data by strainmeter, judges whether data have reliability.The data importing stress processed solves module, solves the components of stress of loading direction and the size and Orientation of principle stress; Again the size and Orientation of principle stress is imported stress state analysis module, solve the stress state on any direction.
In modelling process, this element stress meter is placed on required test point, element stress meter is embedded in model close beta point and forms with it an entirety and reduce the interference to model itself to greatest extent, the space stress state of the real reaction model close beta point of energy.

Claims (3)

1. a underground project model test inner space stress measurement device, is characterized in that: measurement mechanism comprises: element stress meter, strain acquirement instrument and analysis module; Element stress meter, strain acquirement instrument and analysis module are linked in sequence; Described element stress meter is made up of resistance strain gage and similar units block; Described similar units block adopts the polyurethane suitable with cast material elastic modulus to be made; Three resistance strain gages are pasted in three faces adjacent at the diagonal angle of similar units block respectively, and wherein the direction of two foil gauges is orthogonal, another strainometer and the first two angle at 45 °; Strain value on described strain acquirement instrument collecting unit taseometer; Described analysis module is the software for calculation utilizing Matalab to work out.
2. a kind of underground project model test inner space according to claim 1 stress measurement device, is characterized in that: described element stress meter is embedded in model close beta point; The Detection Information that element stress meter obtains imports analysis module by strain acquirement instrument, and display model inner space directly perceived stress state on analysis module, described stress state comprises the components of stress of principle stress size and Orientation, any direction.
3. a underground project model test inner space method for measuring stress, is characterized in that: measuring method is: element stress meter obtains ε by three orthogonal directions foil gauges x, ε y, ε z, survey the ε obtained xy (45 °), ε yz (45 °), ε zx (45 °)and ε x, ε y, ε zcalculate shearing strain γ xy, γ yz, γ xz, according to ε x, ε y, ε zand γ xy, γ yz, γ xzsix components of strain can solve σ x, σ y, σ z, τ xy, τ yz, τ zxsix components of stress, and then solve the size and Orientation of three principle stresses, obtain the space stress state of test point;
Utilize Matalab software for calculation that whole computation process is compiled into analysis module, the computing method of analysis module: to the data analysis process gathered in the data importing pretreatment module first gathered by strain acquirement instrument, to judge whether data have reliability; The data importing stress processed is solved module, solves the components of stress of loading direction and the size and Orientation of principle stress; Again the size and Orientation of principle stress is imported stress state analysis module, solve the stress state on any direction; Realization is to the real-time monitoring of STRESS VARIATION in the measurement of model inner space stress state and test loading procedure.
CN201510793814.XA 2015-11-17 2015-11-17 Underground engineering model test internal space stress measuring device and method Pending CN105258829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510793814.XA CN105258829A (en) 2015-11-17 2015-11-17 Underground engineering model test internal space stress measuring device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510793814.XA CN105258829A (en) 2015-11-17 2015-11-17 Underground engineering model test internal space stress measuring device and method

Publications (1)

Publication Number Publication Date
CN105258829A true CN105258829A (en) 2016-01-20

Family

ID=55098607

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510793814.XA Pending CN105258829A (en) 2015-11-17 2015-11-17 Underground engineering model test internal space stress measuring device and method

Country Status (1)

Country Link
CN (1) CN105258829A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106524988A (en) * 2016-10-28 2017-03-22 天津城建大学 Three-dimensional strain rosette apparatus based on octahedron and test method
CN106767971A (en) * 2016-11-22 2017-05-31 西安建筑科技大学 A kind of multidirectional installation method of strain transducer
CN106771102A (en) * 2017-01-25 2017-05-31 厦门理工学院 The measuring system and measuring method of Non-load Concrete internal stress in concrete structure
CN109406016A (en) * 2018-12-12 2019-03-01 中国矿业大学(北京) A kind of ball-type motion and stress monitoring instrument of side slope model test
CN109520830A (en) * 2018-11-23 2019-03-26 中国船舶重工集团公司第七〇九研究所 A kind of pipeline elastic element acoustic states on-Line Monitor Device
CN109632158A (en) * 2018-12-19 2019-04-16 天地科技股份有限公司 Model test stress test block and its preparation and application
CN111721636A (en) * 2020-06-30 2020-09-29 江苏永大化工设备有限公司 Pressure-bearing equipment pressure-resistant test automatic loading control system
CN111811938A (en) * 2020-07-21 2020-10-23 重庆大学 Strain brick and preparation method thereof
CN112649130A (en) * 2020-12-29 2021-04-13 上海海事大学 Medical puncture biopsy needle interface interaction mechanical property integrated test and method
CN113624123A (en) * 2021-08-13 2021-11-09 中国科学院武汉岩土力学研究所 Three-dimensional strain measurement system based on three-dimensional printing technology and test method thereof
CN113758622A (en) * 2021-08-12 2021-12-07 华能澜沧江水电股份有限公司 Method for manufacturing disturbance stress sensor
CN117346929A (en) * 2023-10-12 2024-01-05 深地科学与工程云龙湖实验室 Strain brick for measuring internal stress of surrounding rock and application method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739666A (en) * 1983-12-12 1988-04-26 Pfister Gmbh Flat-spread force measuring device
CN102095533A (en) * 2010-12-09 2011-06-15 南京大学 Three-dimensional stress measuring device in geologic structure simulated experiment
CN102175366A (en) * 2011-03-05 2011-09-07 河南理工大学 Fiber bragg grating (FBG) testing device and testing method for rock three-dimensional stress state
CN102410893A (en) * 2011-08-08 2012-04-11 大连理工大学 Embedded concrete structure power damage process space stress sensor
CN103398807A (en) * 2013-08-12 2013-11-20 中交第一公路工程局有限公司土木技术研究院 Novel three dimensional stress measuring sensor
CN104458073A (en) * 2013-09-18 2015-03-25 长江大学 Implantable concrete three-dimensional space stress monitoring sensor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4739666A (en) * 1983-12-12 1988-04-26 Pfister Gmbh Flat-spread force measuring device
CN102095533A (en) * 2010-12-09 2011-06-15 南京大学 Three-dimensional stress measuring device in geologic structure simulated experiment
CN102175366A (en) * 2011-03-05 2011-09-07 河南理工大学 Fiber bragg grating (FBG) testing device and testing method for rock three-dimensional stress state
CN102410893A (en) * 2011-08-08 2012-04-11 大连理工大学 Embedded concrete structure power damage process space stress sensor
CN103398807A (en) * 2013-08-12 2013-11-20 中交第一公路工程局有限公司土木技术研究院 Novel three dimensional stress measuring sensor
CN104458073A (en) * 2013-09-18 2015-03-25 长江大学 Implantable concrete three-dimensional space stress monitoring sensor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
仲跻云: "测量岩体动应变的应变砖", 《岩土力学》 *
危洪清: "应用Matlab分析三向应力状态", 《科技信息》 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106524988A (en) * 2016-10-28 2017-03-22 天津城建大学 Three-dimensional strain rosette apparatus based on octahedron and test method
CN106767971A (en) * 2016-11-22 2017-05-31 西安建筑科技大学 A kind of multidirectional installation method of strain transducer
CN106771102A (en) * 2017-01-25 2017-05-31 厦门理工学院 The measuring system and measuring method of Non-load Concrete internal stress in concrete structure
CN109520830B (en) * 2018-11-23 2024-03-08 中国船舶重工集团公司第七一九研究所 Online monitoring device for acoustic state of pipeline elastic element
CN109520830A (en) * 2018-11-23 2019-03-26 中国船舶重工集团公司第七〇九研究所 A kind of pipeline elastic element acoustic states on-Line Monitor Device
CN109406016A (en) * 2018-12-12 2019-03-01 中国矿业大学(北京) A kind of ball-type motion and stress monitoring instrument of side slope model test
CN109632158A (en) * 2018-12-19 2019-04-16 天地科技股份有限公司 Model test stress test block and its preparation and application
CN111721636A (en) * 2020-06-30 2020-09-29 江苏永大化工设备有限公司 Pressure-bearing equipment pressure-resistant test automatic loading control system
CN111811938B (en) * 2020-07-21 2022-09-20 重庆大学 Strain brick and preparation method thereof
CN111811938A (en) * 2020-07-21 2020-10-23 重庆大学 Strain brick and preparation method thereof
CN112649130A (en) * 2020-12-29 2021-04-13 上海海事大学 Medical puncture biopsy needle interface interaction mechanical property integrated test and method
CN113758622A (en) * 2021-08-12 2021-12-07 华能澜沧江水电股份有限公司 Method for manufacturing disturbance stress sensor
CN113624123A (en) * 2021-08-13 2021-11-09 中国科学院武汉岩土力学研究所 Three-dimensional strain measurement system based on three-dimensional printing technology and test method thereof
CN113624123B (en) * 2021-08-13 2022-08-23 中国科学院武汉岩土力学研究所 Three-dimensional strain measurement system based on three-dimensional printing technology and test method thereof
CN117346929A (en) * 2023-10-12 2024-01-05 深地科学与工程云龙湖实验室 Strain brick for measuring internal stress of surrounding rock and application method thereof

Similar Documents

Publication Publication Date Title
CN105258829A (en) Underground engineering model test internal space stress measuring device and method
CN102620870B (en) Rock three-way pressure stress sensor based on optical fiber grating sensing
CN106442104B (en) Three-dimensional stress constraint test device and operating method based on regular dodecahedron
CN105277428A (en) Mechanical property damage change measurement system and method for fragile materials under high-temperature and low-temperature load
CN107882011B (en) miniature probe with temperature compensation function
CN203310554U (en) Three-component dual-ring borehole deformeter
CN205246041U (en) Three -dimensional joint measurement device of displacement sensor parallel placement
CN102865952A (en) Nondestructive testing method for working stress of concrete
CN103837275A (en) Dynamic bending moment test system for ship shafting
CN106524988A (en) Three-dimensional strain rosette apparatus based on octahedron and test method
CN104931353B (en) Coal column plastic zone method of testing and test device
CN105758602A (en) Truss girder bridge section buffeting force synchronous measurement method
CN103575332B (en) Multi-dimensional and multidirectional stress-strain monitoring system
CN206177288U (en) A testing arrangement for component slant angle measuring
CN206756109U (en) A kind of pit shaft borehole wall deforms automatic measuring instrument
CN104501732B (en) A kind of hydro-structure distortion distributed optical fiber sensing device and method
CN115479711A (en) Hard-shell bag body stress meter for three-dimensional stress of underground engineering and monitoring system
CN110487634A (en) The System and method for of core strain, resistivity DCO detailed checkout under a kind of stress state
CN204286374U (en) A kind of hydro-structure distortion distributed optical fiber sensing device
CN210690242U (en) System for meticulous test of rock core strain, resistivity under loading state
CN108593525A (en) A kind of rock three-dimensional permeability real-time determining device and method
CN201083518Y (en) Waveform height measuring systems
CN102901611B (en) A kind of quick arrange distinguish method of satellite antenna structural damage based on modal test
CN204405306U (en) Fatigue life gage caliberating device
CN205175809U (en) Damage of mechanics characteristic changes measurement system under high low temperature load of brittle material

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

Application publication date: 20160120

RJ01 Rejection of invention patent application after publication