CN205049413U - Loess mechanical test microcosmic observation device under micro - environment - Google Patents
Loess mechanical test microcosmic observation device under micro - environment Download PDFInfo
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- CN205049413U CN205049413U CN201520828164.3U CN201520828164U CN205049413U CN 205049413 U CN205049413 U CN 205049413U CN 201520828164 U CN201520828164 U CN 201520828164U CN 205049413 U CN205049413 U CN 205049413U
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Abstract
The utility model discloses a loess mechanical test microcosmic observation device under micro - environment, including square table, set up microscope and microscope stage on square table, the last soil sample box that is used for surveing the soil sample of installing of microscope stage, the constant force can be applyed to the soil sample to the soil sample box when observing to can be through the structural change of the whole in -process of microscopic examination soil sample. The utility model discloses an adoption is two boxes cover mode together, and the box is one fixed, and the fine rule pulling is crossed to a box bi -pass, reduces the space between two boxes, and makes two boxes soil sample within a definite time receive the squeezing action, then utilize the microscope, but the change of direct observation to the microcosmic form of loess when the atress to the loessal atress characteristic of analysis has the significance to studying loessal settlement by soaking.
Description
[technical field]
The utility model belongs to natural science technical field, and relating to is loess mechanics test microcosmic observation device under a kind of microscopy environment.
[background technology]
Loess is a kind of typical structured soils, controls its main mechanical behavior, particularly to the susceptibility of water by skeleton particle and the cementing aerial construction system formed of point contact type.This just makes us likely start with from micromechanism and studies the mechanical behavior of its macroscopic deformation and destruction.As Shen Zhujiang (1996) points out: " start with from the test of micromechanism index, the theory relation between research microstructure form and distortion." this is also a new direction of Development of Soil Mechanics.
To the architectural feature of loess, Chinese scholars has carried out fruitful research, has achieved basically identical understanding at present.The older generation scholar such as Zhu Hai Zhi etc. (1956), woods Chongyi (1962), Zhang Zonghu etc. (1964), Liu Dongsheng (1966), Gao Guorui (1980), Lei Xiangyi (1983), Wang Yongyan (1990) successively utilizes the technology such as microscope, scanning electron microscope and pressure mercury to carry out observational study to the microstructure of loess, analyzes loess skeleton particle composition, form, arrangement mode; Pore size and hole classification; Cement ingredients and cementation type etc., think typical loess to have with powder be skeleton, be cementing aerial construction with clay and salt, this aerial construction is the basic premise of collapsibility of loess.Loess Collapsibility is then, caused by the intergranular of not water resistant connects, it is generally acknowledged that clay is main grain-to-grain cementation material; Soluble salt is few, is in dissolved state; Carbonate then belong to stablize cementing.Poplar is shipped (1988) by the distribution of pores of loess before and after polarized light microscope observing saturated yielding, thinks that loess is met water bond strength and weakened and cause saturated yielding.Miao Tiande etc. (1990,1999), by structure of loess change before and after electron microscopic observation saturated yielding, think that microstructure instability result in Collapsing Deformation.Bai Xiaohong (2002) thinks that loess is made up of loose structure and compact structure two parts, there is larger hole between loose structure, and macroporous existence is the necessary condition producing saturated yielding.Lin (1995) summarizes the Regional Laws of NW China Loess Collapsibility characteristic, shows that collapsibility of loess increases to west gradually in east.Muxart (1995) has done pour to strain to test and scanning electron microscopic observation to the natural loess of Lanzhou of China, finds that infiltration makes the dispersion of loess internal particle, crack expands, meets the performance enhancement of water generation saturated yielding.In a word, be basically identical to the understanding of Chinese scholars to collapsibility of loess, the structural failure of namely meeting water unstable is the essence of its saturated yielding.
The research of loess microstructure discloses the essence of collapsibility of loess, but this is only limited to qualitatively analyze and description, and people also attempt to set up the relation between micromechanism and Macroscopic physical mechanical index.Gao Guorui (1980,1988) microstructure of loess is divided into 12 kinds of structure types by particle shape, arrangement mode and connected mode, and the corresponding relation of structure type and coefficient of collapsibility and collapse initial compression is provided according to part measured data, utilize this relation to make qualitative discrimination to collapsibility of loess.
It is all still image that forefathers study loess microstructure of one, is difficult to the change observing its structure in its stress deformation process, and metamorphosis time stressed to loess is that imagination and analysis get mostly, and non-immediate observation.
[utility model content]
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, and under providing a kind of microscopy environment, loess mechanics tests microcosmic observation device, and this device can better study Loess Collapsibility mechanism, instructs engineering practice, reduces disaster generation.
For achieving the above object, the utility model is achieved by the following technical solutions:
Loess mechanics test microcosmic observation device under a kind of microscopy environment, comprise square table, be arranged on the microscope on square table and microscope stage, microscope stage is provided with the soil sample box for observing soil sample, soil sample box can apply constant force when observing to soil sample, thus can by the structure change in the whole process of microscopic examination soil sample.
The utility model further improves and is:
Described soil sample box comprises hollow and the box one of one end open and the solid box two that is fixed on microscope stage, and box two is set in box one, fills soil sample to be observed in box one.
Described box one open at one end is connected with fine rule, and the fixed pulley being fixed on box two end walked around by fine rule, and the other end of fine rule connects weight, makes box one receive constant force effect to its opening direction, and then applies constant force to the soil sample of box one inside.
Compared with prior art, the utility model has following beneficial effect:
The utility model is by adopting the mode be nested together by two boxes, box one is fixed, box two-way is crossed fine rule and is pulled, reduce the space between two boxes, make the effect of being squeezed of the soil sample between two boxes, then utilize microscope, the micromorphologic change of loess when stressed can be observed directly, thus the stress characteristic of analysis loess, significant to the settlement by soaking of research loess.
[accompanying drawing explanation]
Fig. 1 is the front elevation of the utility model device;
Fig. 2 is the side view of the utility model device.
Wherein: 1 is microscope; 2 is soil sample box; 3 is microscope stage; 4 is square table; 5 is fine rule; 6 is box one; 7 is box two.
[embodiment]
Below in conjunction with accompanying drawing, the utility model is described in further detail:
See Fig. 1 and Fig. 2, the utility model comprises microscope 1 and soil sample box 2, and microscope is placed on square table 4, and wherein soil sample box 2 is placed on microscope stage 3.Soil sample box 2 is made up of box 1, box 26, two boxes small one and large one be nested together, middlely place soil sample, box two is fixed, box one connects fixed pulley 6 by fine rule 5, realizes afterburning extruding to soil sample, simultaneously can by the structure change in the whole process of microscopic examination soil sample.
The utility model utilizes Olympus metaloscope, annular microlens light source, digital single-lens reflex camera, notebook computer and related software, and assembling forms imaging system, and the depth of field solving loess contoured surface micro-imaging crosses shallow problem.Under making microscope, the testing apparatus of loess, comprises the transparent sample box of one side, plate test loading system, microscope cushion cap, sample water drench system.Equipment is applied: take Lanzhou serious collapsibility loess to carry out confined compression test, unconfined compression test, direct shear test and saturated yielding test, obtain the microstructural image in process of the test.The utility model utilizes sample box on objective table and the pulley in left side and the connection of right side stiff end, by the mode of hanging weight below pulley, stressed effect is executed to the soil sample in box, utilize the change of microscope to soil particle hole to observe simultaneously.
Above content is only and technological thought of the present utility model is described; protection domain of the present utility model can not be limited with this; every technological thought according to the utility model proposes, any change that technical scheme basis is done, within the protection domain all falling into the utility model claims.
Claims (3)
1. loess mechanics test microcosmic observation device under a microscopy environment, it is characterized in that, comprise square table (4), be arranged on the microscope (1) on square table (4) and microscope stage (3), microscope stage (3) is provided with the soil sample box (2) for observing soil sample, soil sample box (2) can apply constant force when observing to soil sample, thus can by the structure change in the whole process of microscopic examination soil sample.
2. loess mechanics test microcosmic observation device under microscopy environment according to claim 1, it is characterized in that, described soil sample box (2) comprises hollow and the box one (7) of one end open and the solid box two (6) that is fixed on microscope stage (3), box two (6) is set in box one (7), fills soil sample to be observed in box one (7).
3. loess mechanics test microcosmic observation device under microscopy environment according to claim 2, it is characterized in that, described box one (7) open at one end is connected with fine rule (5), the fixed pulley (8) being fixed on box two (6) end walked around by fine rule (5), the other end of fine rule (5) connects weight (9), make box one (7) receive constant force effect to its opening direction, and then the soil sample inner to box one (7) apply constant force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520828164.3U CN205049413U (en) | 2015-10-22 | 2015-10-22 | Loess mechanical test microcosmic observation device under micro - environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520828164.3U CN205049413U (en) | 2015-10-22 | 2015-10-22 | Loess mechanical test microcosmic observation device under micro - environment |
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| Publication Number | Publication Date |
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| CN205049413U true CN205049413U (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520828164.3U Expired - Fee Related CN205049413U (en) | 2015-10-22 | 2015-10-22 | Loess mechanical test microcosmic observation device under micro - environment |
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| CN (1) | CN205049413U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020460A (en) * | 2018-02-05 | 2018-05-11 | 安徽理工大学 | A kind of coefficient of collapsibility of loess measuring apparatus and its measuring method |
| CN108152308A (en) * | 2017-11-29 | 2018-06-12 | 中国电力科学研究院有限公司 | The detection method of chemical bond power between a kind of soil body particle |
| CN109459460A (en) * | 2018-12-25 | 2019-03-12 | 长安大学 | A kind of scanning electron microscope observation device and method of intact loess humidification sample |
| US10495568B2 (en) | 2017-04-28 | 2019-12-03 | The Royal Institution For The Advancement Of Learning/Mcgill University | Apparatus for analyzing a sample of granular material |
-
2015
- 2015-10-22 CN CN201520828164.3U patent/CN205049413U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10495568B2 (en) | 2017-04-28 | 2019-12-03 | The Royal Institution For The Advancement Of Learning/Mcgill University | Apparatus for analyzing a sample of granular material |
| CN108152308A (en) * | 2017-11-29 | 2018-06-12 | 中国电力科学研究院有限公司 | The detection method of chemical bond power between a kind of soil body particle |
| CN108020460A (en) * | 2018-02-05 | 2018-05-11 | 安徽理工大学 | A kind of coefficient of collapsibility of loess measuring apparatus and its measuring method |
| CN109459460A (en) * | 2018-12-25 | 2019-03-12 | 长安大学 | A kind of scanning electron microscope observation device and method of intact loess humidification sample |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20161022 |