CN1401987A - Circular loading shear apparatus for observing earth and structural member contact face mechanical property - Google Patents
Circular loading shear apparatus for observing earth and structural member contact face mechanical property Download PDFInfo
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- CN1401987A CN1401987A CN02131066.1A CN02131066A CN1401987A CN 1401987 A CN1401987 A CN 1401987A CN 02131066 A CN02131066 A CN 02131066A CN 1401987 A CN1401987 A CN 1401987A
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Abstract
A cyclic loading shear tester for observing the mechanical characteristics of interface between earth and structural member is composed of the earth container carriage with organic glass window, normal boundary control unit put on structural plate on the earth, data acquisition system, and hydraulic loading and control system. Its advnatages are high test and measuring precision, and use of digital photography.
Description
Technical field
The invention belongs to dynamic characteristic test equipment, be used in particular for reproducing and a kind of observing earth of the quiet dynamic response of observing earth and works surface of contact and the circular loading shear apparatus of structural member contact face mechanical property.
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.With miniature " periscope " device, and soil distributes with the structural member relative displacement near Hu Liming in 2000 etc. are directly used in the observation structure face with digital photo technologies as abundant Zong Ze in 1994 etc.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 circular loading shear apparatus that the purpose of this invention is to provide a kind of observing earth and structural member contact face mechanical property, described boxshear apparatus mainly is made up of support, soil container car, hydraulic loaded and control system, normal direction border control module, data acquisition system (DAS), 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 be connected with the vertical hydraulic cylinder that is fixed on the support top, 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, at the native baffle plate of the left and right sides of soil container difference mounting strap spring.
Described data acquisition system (DAS) is connected with the output line end of level, Vertical Load sensor, horizontal vertical displacement sensor and digital photographing apparatus respectively.
Described soil container car is equipped with the organic glass form and is used near the thin sight state of the soil of observation structure face and the distortion of surface of contact, and is convenient to adopt digital photo technologies to carry out record, analyzes.
1. these equipment that the invention has the beneficial effects as follows have bigger surface of contact size (45cm * 36cm), higher load (20t) and bigger shear displacemant (10cm), thereby 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 structure that Figure 1 shows that observing earth and structural member contact face mechanical property is formed synoptic diagram, this boxshear apparatus is mainly 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.Be provided with the native baffle plate 17 (as shown in Figure 2) of band spring in the direction of motion both sides of vessel vehicle 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 (3)
1. the circular loading shear apparatus of observing earth and structural member contact face mechanical property, described boxshear apparatus mainly is made up of support, soil container car, hydraulic loaded and control system, normal direction border control module, data acquisition system (DAS), 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 be connected with the vertical hydraulic cylinder that is fixed on the support top, 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, at the native baffle plate of the left and right sides of soil container difference mounting strap spring.
2. according to the circular loading shear apparatus of described observing earth of claim 1 and structural member contact face mechanical property, it is characterized in that: described data acquisition system (DAS) is connected with the output line end of level, Vertical Load sensor, horizontal vertical displacement sensor and digital photographing apparatus respectively.
3. according to the circular loading shear apparatus of described observing earth of claim 1 and structural member contact face mechanical property, it is characterized in that: described soil container car is equipped with the organic glass form and is used to observe near the thin sight state of the soil of surface of contact and the distortion of surface of contact, and be convenient to digital photo technologies and carry out record, analyze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021310661A CN1188688C (en) | 2002-09-28 | 2002-09-28 | Circular loading shear apparatus for observing earth and structural member contact face mechanical property |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021310661A CN1188688C (en) | 2002-09-28 | 2002-09-28 | Circular loading shear apparatus for observing earth and structural member contact face mechanical property |
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| Publication Number | Publication Date |
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| CN1401987A true CN1401987A (en) | 2003-03-12 |
| CN1188688C CN1188688C (en) | 2005-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021310661A Expired - Fee Related CN1188688C (en) | 2002-09-28 | 2002-09-28 | Circular loading shear apparatus for observing earth and structural member contact face mechanical property |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100473968C (en) * | 2004-11-30 | 2009-04-01 | 中国科学院武汉岩土力学研究所 | Stress-water flow-ohemical coupled rock urpture process mesomechanic loading system |
| CN102207436A (en) * | 2010-07-26 | 2011-10-05 | 水利部交通运输部国家能源局南京水利科学研究院 | High performance direct shearing apparatus for large contact surfaces |
| CN102507392A (en) * | 2011-11-07 | 2012-06-20 | 同济大学 | Tester for interface of different materials under point/rectangular load and photoelastic test method |
| CN102830022A (en) * | 2012-08-29 | 2012-12-19 | 四川大学 | Multi-functional mechanical property tester of rock |
| CN104502270A (en) * | 2014-12-22 | 2015-04-08 | 长安大学 | Direct shear apparatus and determination method for determining soil-rib interface friction coefficient |
| CN105300813A (en) * | 2015-11-21 | 2016-02-03 | 湘潭市汇丰设备制造有限公司 | Large-scale cyclic simple shear test apparatus |
| CN105300811A (en) * | 2015-10-25 | 2016-02-03 | 长沙新气象自动化技术有限公司 | Large-size soil circular shear testing machine |
| CN105300876A (en) * | 2015-11-07 | 2016-02-03 | 北京工业大学 | Self-balancing type test device for interaction between embedded pipeline and soil mass |
| CN104749055B (en) * | 2015-01-22 | 2017-10-27 | 同济大学 | Realize the experimental rig of vertical circulation compression side rocking shearing power loading |
| CN108613884A (en) * | 2018-04-11 | 2018-10-02 | 浙江大学 | A kind of ring shear apparatus being contemplated that constant stiffness constant volume Chang Yingli |
| CN109060504A (en) * | 2018-08-01 | 2018-12-21 | 清华大学 | Soil and structure interface testing machine |
| CN109060505A (en) * | 2018-08-01 | 2018-12-21 | 清华大学 | Soil tests soil container with structure interface |
| CN110411804A (en) * | 2019-09-02 | 2019-11-05 | 上海交通大学 | A kind of contact face mechanical property test sample, preparation method and the test method of the soil body and structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100363730C (en) * | 2006-01-23 | 2008-01-23 | 太原电力高等专科学校 | Static load test device for composite foundation |
-
2002
- 2002-09-28 CN CNB021310661A patent/CN1188688C/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100473968C (en) * | 2004-11-30 | 2009-04-01 | 中国科学院武汉岩土力学研究所 | Stress-water flow-ohemical coupled rock urpture process mesomechanic loading system |
| CN102207436A (en) * | 2010-07-26 | 2011-10-05 | 水利部交通运输部国家能源局南京水利科学研究院 | High performance direct shearing apparatus for large contact surfaces |
| CN102207436B (en) * | 2010-07-26 | 2013-03-06 | 水利部交通运输部国家能源局南京水利科学研究院 | High performance direct shearing apparatus for large contact surfaces |
| CN102507392A (en) * | 2011-11-07 | 2012-06-20 | 同济大学 | Tester for interface of different materials under point/rectangular load and photoelastic test method |
| CN102507392B (en) * | 2011-11-07 | 2013-08-14 | 同济大学 | Tester for interface of different materials under point/rectangular load and photoelastic test method |
| CN102830022A (en) * | 2012-08-29 | 2012-12-19 | 四川大学 | Multi-functional mechanical property tester of rock |
| CN102830022B (en) * | 2012-08-29 | 2014-11-12 | 四川大学 | Multi-functional mechanical property tester of rock |
| CN104502270A (en) * | 2014-12-22 | 2015-04-08 | 长安大学 | Direct shear apparatus and determination method for determining soil-rib interface friction coefficient |
| CN104749055B (en) * | 2015-01-22 | 2017-10-27 | 同济大学 | Realize the experimental rig of vertical circulation compression side rocking shearing power loading |
| CN105300811A (en) * | 2015-10-25 | 2016-02-03 | 长沙新气象自动化技术有限公司 | Large-size soil circular shear testing machine |
| CN105300876A (en) * | 2015-11-07 | 2016-02-03 | 北京工业大学 | Self-balancing type test device for interaction between embedded pipeline and soil mass |
| CN105300813A (en) * | 2015-11-21 | 2016-02-03 | 湘潭市汇丰设备制造有限公司 | Large-scale cyclic simple shear test apparatus |
| CN108613884A (en) * | 2018-04-11 | 2018-10-02 | 浙江大学 | A kind of ring shear apparatus being contemplated that constant stiffness constant volume Chang Yingli |
| CN109060504A (en) * | 2018-08-01 | 2018-12-21 | 清华大学 | Soil and structure interface testing machine |
| CN109060505A (en) * | 2018-08-01 | 2018-12-21 | 清华大学 | Soil tests soil container with structure interface |
| CN109060504B (en) * | 2018-08-01 | 2023-11-03 | 清华大学 | Soil and structure contact surface testing machine |
| CN109060505B (en) * | 2018-08-01 | 2023-12-29 | 清华大学 | Soil container for soil and structure contact surface test |
| CN110411804A (en) * | 2019-09-02 | 2019-11-05 | 上海交通大学 | A kind of contact face mechanical property test sample, preparation method and the test method of the soil body and structure |
| CN110411804B (en) * | 2019-09-02 | 2024-04-16 | 上海交通大学 | Test sample for mechanical properties of contact surface of soil body and structure, preparation method and test method |
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| CN1188688C (en) | 2005-02-09 |
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