CN101329236A - Circulation load application shearing instrument for observing mechanics characteristic of soil contact face and structural part - Google Patents
Circulation load application shearing instrument for observing mechanics characteristic of soil contact face and structural part Download PDFInfo
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- CN101329236A CN101329236A CNA2007100117528A CN200710011752A CN101329236A CN 101329236 A CN101329236 A CN 101329236A CN A2007100117528 A CNA2007100117528 A CN A2007100117528A CN 200710011752 A CN200710011752 A CN 200710011752A CN 101329236 A CN101329236 A CN 101329236A
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Abstract
The invention discloses a cyclic shear apparatus which belongs to mechanic characteristic testing equipment and is used for observing the mechanical characteristic of the contact surface between structural member and soil. The cyclic shear apparatus consists essentially of a soil container vehicle which is arranged inside a bracket, a normal boundary control unit, a data collecting system and a hydraulic loading and control system which is fixed on the bracket; the soil container vehicle is arranged on a horizontal track on the internal bottom surface of the bracket; testing soils are fully filled in the vehicle where a structural panel is horizontally arranged; the normal boundary control unit is arranged on the upper surface of the structural panel; furthermore, the soil container vehicle is provided with an organic glass window. The cyclic shear apparatus can lead the static and dynamic mechanical characteristic of the contact surface under complicated stresses to reappear; furthermore, the cyclic shear apparatus directly exerts normal boundary conditions on the contact surface and measures the deformation of the contact surface due to bearing force, thus improving the testing and measuring precision; digital photography is used for directly recording the microscopic phenomena of the soil gains such as microscopic state arranging, sliding of the gains along the long axis direction and along the structural surface, rotating of the gain, and crushing of the gains, etc. so as to facilitate the analysis; furthermore, the cyclic shear apparatus can further determine the distribution of relative displacement of the soil and structural member along the contact surface and the thickness of the contact surface.
Description
Technical field
The invention belongs to dynamic characteristic test equipment, be used in particular for reproducing the circular loading shear apparatus that is used for observation structure spare and mechanics characteristic of soil contact face with the quiet dynamic response of observing earth and works surface of contact a kind of.
Background technology
Soil has direct shear apparatus, simple shear apparatus, torsion shear apparatus, dynamic triaxial apparatus and resonance column device etc. with the key instrument of the quiet dynamics experimental study of structural member contact face.Wherein, staight scissors and simple shear type surface of contact test apparatus are to improve to obtain on the basis of the direct shear apparatus of the mechanical characteristic of research soil and simple shear apparatus, are used widely in the contact face mechanical property experimental study at present.
Develop and developed a collection of equipment and the corresponding measuring technology of reproducing the contact face mechanical response that be exclusively used in recent years both at home and abroad.These testing equipments comprise the multiple degrees of freedom circulation shear instrument that can carry out the quiet Dynamical Characteristics of surface of contact, and can freely shear on surface of contact, realize normal pressure power, Chang Gangdu and the normal displacement method of three categories circulating three-dimensional surface of contact boxshear apparatus to constraint condition.Aspect observation technology, except the macroscopic measurement technology automaticity and number semen collection degree further improve, thin observed quantity technology also is applied gradually, combining closely of two kinds of measuring techniques becomes an important development trend of surface of contact measuring technique.As people such as Yin Zongze in " Geotechnical Engineering journal " in May, 1994,16 volumes, the 3rd phase, people such as " miniature periscope device " on the P14-22 and Hu Liming are in " Geotechnical Engineering journal " July calendar year 2001,23 volumes, the 4th phase, soil distributed with the structural member relative displacement near " digital photo technologies " on the P431-435 was directly used in the observation structure face.But existing testing equipment all is to improve to obtain on quiet dynamics testing equipment (as direct shear apparatus, the simple shear apparatus etc.) basis of soil mostly, does not take into full account the characteristics of surface of contact itself.For example, normal stress generally is applied on the soil body rather than directly puts on surface of contact itself, thereby causes control surface of contact normal direction difficulty of boundary conditions and measure the error etc. of normal stress; And for example, existing surface of contact test mostly is confined to observe on its shear property, also exist the normal direction distortion of can not ignore and the coupled characteristic of normal stress strain stress relation and tangential stress strain stress relation and ignored surface of contact, therefore require the response of reproduction surface of contact under complex stress path more; In addition, the size of existing surface of contact testing equipment is generally less, only is applicable to fine grained soils such as sand, is difficult to simulate bigger coarse-grained soil of particle diameter and the actual mechanical behavior of structural member contact face under dullness loading or CYCLIC LOADING action condition; Though the thin sight and the microscopic measurement technology of surface of contact obtain Preliminary Applications, do not reach ripe, especially in main equipment, be not used widely and combination preferably.These defective significant limitation the research of soil with structural member contact face especially coarse-grained soil and the quiet dynamics of structural member contact face.
Summary of the invention
The purpose of this invention is to provide a kind of circular loading shear apparatus that is used for observation structure spare and mechanics characteristic of soil contact face.
The technical scheme that adopts is:
The circular loading shear apparatus that is used for observation structure spare and mechanics characteristic of soil contact face, comprise support, soil container car, hydraulic loaded and control system, normal direction border control module, data acquisition system (DAS) and digital photographing apparatus composition, it is characterized in that: the soil container car is placed on the horizontal rail on the support inner bottom surface, the test soil body is filled in the car, above structural panel lies in; Structural panel is in upper flange snaps in the vertical track on support both sides, normal direction border control module and vertical displacement sensor are installed between upper flange and structural panel, the Vertical Load sensor is installed in above the upper flange, and is connected with the vertical hydraulic cylinder that is fixed on the support top; Level, Vertical Load sensor, level, vertical displacement sensor are connected with data acquisition system (DAS) respectively, and the output line end of data acquisition system (DAS) and digital photographing apparatus is connected.Horizontal hydraulic cylinder is fixed on the rack platform in support left side, link together by horizontal loading sensor and soil container car left side, horizontal displacement sensors passes the support right side and is connected with soil container car right side, the native baffle plate of mounting strap spring and the thin sight state that is used near the soil observation structure face is installed and the organic glass form of the distortion of surface of contact in soil container car side respectively in the direction of motion both sides of soil container car, be convenient to digital photographing apparatus and carry out record, analyze.
The invention has the beneficial effects as follows:
1, this equipment has bigger surface of contact size (45cmX36cm), higher load (20t) and bigger shear displacemant (10cm), thus can satisfy the testing requirements of the bigger coarse-grained soil surface of contact of particle diameter; The inventor has adopted mechanical synchronization four cylinder hydraulic systems, overcomes the upsetting moment that occurs in shear history, has not only satisfied testing requirements preferably, and cost is very low, does not need complicated control system.
2, the present invention allows the structural panel can free movement on the surface of contact normal orientation at the trial, and normal force acted on the structural panel, the stress deformation of direct measurement structure panel, therefore be equivalent to normal pressure is directly acted on the surface of contact, and directly measure the stress deformation of surface of contact, thereby improved test and measuring accuracy; Simultaneously the soil container car is improved, direction of motion both sides at car have increased elastic baffle, can either allow soil closely to contact with structural plane, can guarantee that again soil spills when surface of contact is sheared, keep in touch the face constant area, this way is respond well through experimental examination, and cost is very low, is convenient to realize.
3, the present invention has designed normal pressure, Chang Weiyi and normal three kinds of different normal direction boundary conditions of rigidity, the mechanical characteristic under complex stress condition for simulation and observation surface of contact, this equipment applies this three classes boundary condition by normal direction border control module, has both guaranteed measuring accuracy, and cost is low again.
4, loading system of the present invention and data acquisition system (DAS) have all realized robotization.Adopt thin sight state arrangements, particle long axis direction, particle that digital photo technologies directly writes down soil particle along structural plane slide, particle rotates, and thin sight phenomenon such as grain breakage.And, develop the digital image particle and carefully seen the displacement measurement technology, can determine further that soil and structure relative displacement are along the distribution of surface of contact height and the thickness of surface of contact.
Description of drawings
Fig. 1 forms synoptic diagram for the circular loading shear apparatus structure.
Fig. 2 is a soil container car synoptic diagram.
Embodiment
The circular loading shear apparatus that is used for observation structure spare and mechanics characteristic of soil contact face, by support, the soil container car, hydraulic loaded and control system, normal direction border control module, data acquisition system (DAS) is formed, its soil container car 14 is placed on the horizontal rail 15 on support 1 inner bottom surface, the test soil body is filled in the car, above structural panel 4 lies in, snap in together with upper flange 5 in the vertical track 13 on support 1 both sides, normal direction border control module 9 and vertical displacement sensor 10 are installed between upper flange 5 and structural panel 4, Vertical Load sensor 7 is connected with the vertical hydraulic cylinder 8 that is fixed on support 1 top above being installed in upper flange 5, horizontal hydraulic cylinder 2 is fixed on support 1 platform in support 1 left side, link together by horizontal loading sensor 3 and soil container car 14 left sides, horizontal displacement sensors 12 passes support 1 right side and is connected with soil container car 14 right sides.Data acquisition system (DAS) 16 respectively with level, Vertical Load sensor 3,7, the output line end of level, vertical displacement sensor 12,10 and digital photographing apparatus connects.Hydraulic control system 6 is connected with horizontal hydraulic cylinder 2, vertical hydraulic cylinder 8 respectively, is provided with the native baffle plate 17 and the organic glass form 11 (as shown in Figure 2) of band spring in the direction of motion both sides of soil container car 14.
Its groundwork principle is: the soil sample of packing in soil container car 14, the structural plane that fixation test is used on structural panel 4; Soil container car 14 is done round level (surface of contact is tangential) motion under horizontal hydraulic cylinder 2 drives, and vertically be not subjected to displacement on (surface of contact normal direction) direction, realizes the relative tangential motion of soil and structure on the surface of contact; Structural panel 4 maintains static in the horizontal direction, but but in the vertical direction free movement, thereby reflect the normal direction relative motion (the normal direction relative motion comprises because normal pressure changes surface of contact compression and the resilience that causes, also comprises because the surface of contact body that shearing causes becomes) of surface of contact.Upper flange 5 maintains static during test, and normal direction boundary condition (being normal pressure power, Chang Weiyi and normal rigidity boundary condition) is applied directly on the structural panel 4 by normal direction border control module 9.The relative displacement and the stress tangential and normal direction of surface of contact are recorded by corresponding load and displacement transducer, by data acquisition system (DAS) relevant data are passed in the computing machine.By near the thin sight state and the surface of contact distortion situation of the soil organic glass form 11 observation surface of contact, and use digital photo technologies to write down so that analyze.
Claims (1)
1, the circular loading shear apparatus that is used for observation structure spare and mechanics characteristic of soil contact face, described boxshear apparatus comprises support, soil container car, hydraulic loaded and control system, normal direction border control module, data acquisition system (DAS) and digital photographing apparatus, it is characterized in that: soil container is placed on the horizontal rail on the support inner bottom surface, and structural panel lies in above the car of filling the test soil body; Structural panel is in upper flange snaps in the vertical track on support both sides, normal direction border control module and vertical displacement sensor are installed between upper flange and structural panel, the Vertical Load sensor is installed in above the upper flange, and is connected with the vertical hydraulic cylinder that is fixed on the support top; Level, Vertical Load sensor, level, vertical displacement sensor are connected with data acquisition system (DAS) respectively, and the output line end of digital photographing apparatus is connected to the signal input part of data acquisition system (DAS); Horizontal hydraulic cylinder is fixed on the rack platform in support left side, link together by horizontal loading sensor and soil container car left side, horizontal displacement sensors passes the support right side and is connected with soil container car right side, be provided with the native baffle plate of band spring in the direction of motion both sides of soil container and be used for the organic glass form of the distortion of near thin sight state native the observation structure face and surface of contact, be convenient to digital photographing apparatus and carry out record, analyze.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100117528A CN101329236A (en) | 2007-06-19 | 2007-06-19 | Circulation load application shearing instrument for observing mechanics characteristic of soil contact face and structural part |
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| CNA2007100117528A CN101329236A (en) | 2007-06-19 | 2007-06-19 | Circulation load application shearing instrument for observing mechanics characteristic of soil contact face and structural part |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101846606A (en) * | 2010-05-27 | 2010-09-29 | 中国科学院武汉岩土力学研究所 | Earth-structure interaction contact surface shearing test visualization device |
| CN102313673A (en) * | 2011-08-04 | 2012-01-11 | 北京交通大学 | Full-automatic, digital and large frozen soil direct shear apparatus |
| CN102721616A (en) * | 2012-02-16 | 2012-10-10 | 中交天津港湾工程研究院有限公司 | Electroosmosis shear apparatus |
| CN102798575A (en) * | 2012-07-30 | 2012-11-28 | 南京林业大学 | Large-scale multifunctional frozen soil-composition contact surface cycle direct shear apparatus and test operation method |
| CN102914475A (en) * | 2012-10-17 | 2013-02-06 | 中国矿业大学 | Shear test device for observing mechanical property of interface between underwater soil and structure |
| CN103076230A (en) * | 2013-02-05 | 2013-05-01 | 重庆交通大学 | Test method and test device of mechanical properties of soil-structure contact surface |
| CN103163026A (en) * | 2013-03-08 | 2013-06-19 | 长安大学 | Rock-soil pressure shear rheological testing machine and testing method |
| CN103926147A (en) * | 2014-03-31 | 2014-07-16 | 中国人民解放军理工大学 | Flexible boundary load test device |
| CN103994969A (en) * | 2014-05-05 | 2014-08-20 | 河海大学 | Tester and test method for contact characteristic between soil and structure under waterpower combined action |
| CN104912124A (en) * | 2015-06-26 | 2015-09-16 | 青岛理工大学 | Pile soil interface shear simulation tester of opened concrete pipe pile |
| CN104931361A (en) * | 2015-06-26 | 2015-09-23 | 青岛理工大学 | Simulation test method of pile-soil interface shear for open concrete tubular pile |
| CN105910920A (en) * | 2016-06-22 | 2016-08-31 | 青岛理工大学 | Temperature control pile-soil interface direct shear test device |
| CN106323766A (en) * | 2016-09-28 | 2017-01-11 | 同济大学 | Method for observing shear properties of contact surface between sandy soil and structure |
| CN107063890A (en) * | 2017-02-28 | 2017-08-18 | 河南理工大学 | One kind measurement sand and the lower Particle Breakage degree method of structure interface interaction |
| CN107796711A (en) * | 2017-09-20 | 2018-03-13 | 天津大学 | A kind of method for testing complete sample and structural plane dynamic shear strength |
| CN108051304A (en) * | 2017-12-27 | 2018-05-18 | 河北保定城乡建设集团有限责任公司 | A kind of experimental provision and experimental method at multifunction three-dimensional visual structure interface |
| CN109085070A (en) * | 2018-08-09 | 2018-12-25 | 河海大学 | Visual test device and method for soil and the research of works shear property |
| CN109142093A (en) * | 2018-08-20 | 2019-01-04 | 湖南大学 | It is a kind of that the indoor rock direct shear test device and method of normal normal stiffness can be provided |
| CN109540701A (en) * | 2018-12-14 | 2019-03-29 | 东北大学 | A kind of LVDT displacement sensor fixed mechanism applied to rock shearing test |
| CN114414403A (en) * | 2022-01-26 | 2022-04-29 | 中国矿业大学 | Experimental device and method for realizing rock shearing under mining stress gradient |
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2007
- 2007-06-19 CN CNA2007100117528A patent/CN101329236A/en active Pending
Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846606A (en) * | 2010-05-27 | 2010-09-29 | 中国科学院武汉岩土力学研究所 | Earth-structure interaction contact surface shearing test visualization device |
| CN101846606B (en) * | 2010-05-27 | 2011-11-09 | 中国科学院武汉岩土力学研究所 | Earth-structure interaction contact surface shearing test visualization device |
| CN102313673A (en) * | 2011-08-04 | 2012-01-11 | 北京交通大学 | Full-automatic, digital and large frozen soil direct shear apparatus |
| CN102313673B (en) * | 2011-08-04 | 2012-12-26 | 北京交通大学 | Full-automatic, digital and large frozen soil direct shear apparatus |
| CN102721616A (en) * | 2012-02-16 | 2012-10-10 | 中交天津港湾工程研究院有限公司 | Electroosmosis shear apparatus |
| CN102798575A (en) * | 2012-07-30 | 2012-11-28 | 南京林业大学 | Large-scale multifunctional frozen soil-composition contact surface cycle direct shear apparatus and test operation method |
| CN102914475B (en) * | 2012-10-17 | 2014-12-31 | 中国矿业大学 | Shear test device for observing mechanical property of interface between underwater soil and structure |
| CN102914475A (en) * | 2012-10-17 | 2013-02-06 | 中国矿业大学 | Shear test device for observing mechanical property of interface between underwater soil and structure |
| CN103076230A (en) * | 2013-02-05 | 2013-05-01 | 重庆交通大学 | Test method and test device of mechanical properties of soil-structure contact surface |
| CN103163026A (en) * | 2013-03-08 | 2013-06-19 | 长安大学 | Rock-soil pressure shear rheological testing machine and testing method |
| CN103163026B (en) * | 2013-03-08 | 2014-09-24 | 长安大学 | Rock-soil pressure shear rheological testing machine and testing method |
| CN103926147A (en) * | 2014-03-31 | 2014-07-16 | 中国人民解放军理工大学 | Flexible boundary load test device |
| CN103926147B (en) * | 2014-03-31 | 2017-12-12 | 中国人民解放军理工大学 | A kind of flexible boundary load testing machine |
| CN103994969A (en) * | 2014-05-05 | 2014-08-20 | 河海大学 | Tester and test method for contact characteristic between soil and structure under waterpower combined action |
| CN104931361B (en) * | 2015-06-26 | 2017-08-11 | 青岛理工大学 | A kind of open concrete tubular pile stake Soil Interface shearing simulation test method |
| CN104912124A (en) * | 2015-06-26 | 2015-09-16 | 青岛理工大学 | Pile soil interface shear simulation tester of opened concrete pipe pile |
| CN104931361A (en) * | 2015-06-26 | 2015-09-23 | 青岛理工大学 | Simulation test method of pile-soil interface shear for open concrete tubular pile |
| CN104912124B (en) * | 2015-06-26 | 2016-08-24 | 青岛理工大学 | A kind of uncovered concrete tubular pile stake Soil Interface shearing simulation assay device |
| CN105910920A (en) * | 2016-06-22 | 2016-08-31 | 青岛理工大学 | Temperature control pile-soil interface direct shear test device |
| CN106323766A (en) * | 2016-09-28 | 2017-01-11 | 同济大学 | Method for observing shear properties of contact surface between sandy soil and structure |
| CN106323766B (en) * | 2016-09-28 | 2018-10-26 | 同济大学 | A kind of observation procedure of sand and structure interface shear property |
| CN107063890B (en) * | 2017-02-28 | 2019-05-28 | 河南理工大学 | A kind of measurement sand and structure interface interact lower Particle Breakage degree method |
| CN107063890A (en) * | 2017-02-28 | 2017-08-18 | 河南理工大学 | One kind measurement sand and the lower Particle Breakage degree method of structure interface interaction |
| CN107796711A (en) * | 2017-09-20 | 2018-03-13 | 天津大学 | A kind of method for testing complete sample and structural plane dynamic shear strength |
| CN107796711B (en) * | 2017-09-20 | 2019-11-19 | 天津大学 | A method of for testing complete sample and structural plane dynamic shear strength |
| CN108051304A (en) * | 2017-12-27 | 2018-05-18 | 河北保定城乡建设集团有限责任公司 | A kind of experimental provision and experimental method at multifunction three-dimensional visual structure interface |
| CN109085070A (en) * | 2018-08-09 | 2018-12-25 | 河海大学 | Visual test device and method for soil and the research of works shear property |
| CN109085070B (en) * | 2018-08-09 | 2020-10-09 | 河海大学 | Visual test device and method for shear characteristic research of soil and structure |
| CN109142093A (en) * | 2018-08-20 | 2019-01-04 | 湖南大学 | It is a kind of that the indoor rock direct shear test device and method of normal normal stiffness can be provided |
| CN109540701A (en) * | 2018-12-14 | 2019-03-29 | 东北大学 | A kind of LVDT displacement sensor fixed mechanism applied to rock shearing test |
| CN114414403A (en) * | 2022-01-26 | 2022-04-29 | 中国矿业大学 | Experimental device and method for realizing rock shearing under mining stress gradient |
| CN114414403B (en) * | 2022-01-26 | 2023-11-28 | 中国矿业大学 | Experimental device and method for realizing rock shearing under mining stress gradient |
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Open date: 20081224 |