CN106644647A - Compaction device for preparing hollow cylindrical sandy soil test sample with wet smashing method - Google Patents
Compaction device for preparing hollow cylindrical sandy soil test sample with wet smashing method Download PDFInfo
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- CN106644647A CN106644647A CN201710024058.3A CN201710024058A CN106644647A CN 106644647 A CN106644647 A CN 106644647A CN 201710024058 A CN201710024058 A CN 201710024058A CN 106644647 A CN106644647 A CN 106644647A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a compaction device for preparing a hollow cylindrical sandy soil test sample with a wet smashing method. The compaction device comprises a base and driving hammers, and is characterized in that the base is provided with a plurality of guide rods which are distributed vertically; the annular-sector-shaped driving hammer sleeves each guide rod and a fixed rod is fixed on each driving hammer; the upper end of each fixed rod is fixedly connected with a circular ring which is distributed transversely. According to the compaction device for preparing the hollow cylindrical sandy soil test sample with the wet smashing method, disclosed by the invention, the sandy soil test sample can be prepared in a cylindrical hollow space, formed by inner and outer sample preparation molds, by adopting the wet smashing method; meanwhile, the difficulty that the test sample cannot be lifted up from the narrow cylindrical hollow space formed by the inner and outer sample preparation molds after the test sample is compacted by a steel hammer each time is overcome, so that the sandy soil test sample with a specific structure can be obtained; the high-quality sandy soil test sample is provided for researching influences of the structure (a particle arrangement manner) on sandy soil mechanical properties by utilizing a hollow cylinder torsion shear apparatus in the future. The device has the characteristics of improvement of compaction efficiency, simplicity and convenience for operation and the like.
Description
Technical field
The present invention relates to the actual load of hitting that a kind of wet method of smashing prepares hollow cylinder sand sample is put.
Background technology
The soil body mechanical characteristic that crude sedimentation is formed is sufficiently complex, due to by factors such as depositional environment, earth histories
Affect, the soil body has significantly structural.The structural definition of soil is size, the shape of soil particle and hole, and particle arranges shape
Interaction force between formula, and particle, and the geometric properties that particle is arranged referred to as group structure, by the phase interaction between particle
Firmly it is referred to as particle to be coupled, i.e., the Soil Body of broad sense includes that group structure is coupled with particle.With regard to the weight of the structure Journal of Sex Research of soil
The property wanted, is just pointed out, Shen Zhujiang academician is referred to as the core of 21 century soil mechanics early in nineteen twenty-five by Terzaghi, is thanked to definition etc. and is recognized
For a structural internal factor the most basic for being to determine all kinds of soil mechanics characteristics of soil.But for the structural of soil is ground
Study carefully, Shi Bin point out it is structural be difficult to measure and quantification, Comparatively speaking, group structure be easier to Quantitative study, many letters in structure
Breath can be obtained from corresponding group structure, thus it is to be understood that the Structural Characteristics of soil, first have to the research of development group structure.
When seminar's structure affects on sand mechanical characteristic, due to being difficult to obtain original state sand sample, often using different sample preparations
Method prepares sand sample and carries out indoor unit body test.Method for making sample mainly have knockout method, it is wet smash method, sand rain method, subaqueous deposit method,
Lash method, wet method of shaking etc. under water.There are some researches show, sand sample prepared by different method for making sample has different group structures.By knockout
Sand sample obtained in method, the orientation of its particle major axis is bordering on horizontal direction；By it is wet smash method obtained in sand sample, its particle arrangement nothing
Optimal alignment direction, is bordering on disorderly and unsystematic arrangement.With certain matter after sand drying of the wet concrete operations for smashing method for needed for by sample
It is put into after being wrapped up with plastic sheeting after the air free water uniform stirring of amount in sealing container and stands；Afterwards by damp sand be divided into some equal portions according to
Secondary to pour into in original mold tool, every part of sand Jing ramming device hits reality, is controlled as needed per layer height, by applying different journeys
Hitting for degree can make in fact the sample with different relative compactions.
The existing experimental study affected on sand mechanical characteristic with regard to group structure, majority is based on triaxial test.Researcher is led to
Cross and the three axle disdrainage tests research of different group structure sands is found, different group structure examinations under identical relative compaction and stress state
Mechanical Characters of Composite Ground of the sample under identical stress path is different；By triaxial compressions that different group structure sand samples are carried out, the stretching of three axles and
Torsion shear test finds, no matter under the conditions of which kind of shear mode and confined pressure size, under same test conditions, knockout method sample is presented
Go out stronger contracting of cutting, and wet method sample of smashing is with stronger dilatancy and greater stiffness.However, traditional triaxial test can only
Apply vertical force, it is impossible to realize increasingly complex stress path, therefore research contents is less.
Since the eighties in 20th century, hollow cylinder torsional shear instrument gradually develops, the instrument can with confined pressure inside and outside independent control,
Axial force and moment of torsion, such that it is able to realize that big principal direction of stress continuously rotates, the complex stress such as intermediate principal stress index variation road
Footpath, further studies dynamic characteristics of the soil body under the effect such as wave load, traffic loading.But, using the instrument seminar
To sand, the impact of mechanical characteristic under complicated stress environment is but rarely reported structure.Studying carefully its main cause is, triaxial test is real
Heart cylinder sample, carry out it is wet when smashing legal system sample, using three supporting axial cylindrical body ramming devices；And hollow cylinder torsional scissor test
Put without supporting actual load of hitting.For hollow cylinder torsional shear sample, in the narrow and small hollow cylinder space that inside and outside sampling die is formed
In, traditional cylinder ramming device cannot be put at all, and mold height is larger, even if traditional cylinder ramming device reduces
Size can be put into wherein, when reality is hit compared with the bottom soil body, it is difficult to the hand hammer of ramming device is lifted, in addition, hollow cylinder sample
It is ring specimen, according to the traditional ramming device for reducing, due to less with soil sample contact surface, needs repeatedly around mould to sand sample
Carry out hitting reality, so since, sand sample uniformity has very big uncertainty.Cannot prepare hence with traditional ramming device hollow
Cylinder torsional shear sand sample.Hit actual load without hollow cylinder torsional scissor test to put, then cannot carry out it is wet smash method sample preparation, seriously limit utilization
Hollow cylinder torsional shear instrument carries out the research that group structure affects on sand mechanical characteristic.
The content of the invention
In view of the deficiency of background technology, the technical problem to be solved is to provide a kind of wet method of smashing and prepares open circles
The actual load of hitting of post sand sample is put, and the device can be convenient fast in the cylinder hollow space that inside and outside sampling die is formed
It is prompt and equably hit real sand sample.
For this purpose, the actual load of hitting that the wet method of smashing that the present invention is provided prepares hollow cylinder sand sample is put, including pedestal and hammer,
It is characterized in that：Guide post with multiple vertical distributions on the pedestal, is socketed with the hammer of fan annular on each guide post,
Fix bar is fixed with hammer, fix bar upper end is fixedly connected with the annulus of cross direction profiles.
The wet method of smashing that the present invention is provided prepares the actual load of hitting of hollow cylinder sand sample and puts and can realize in inside and outside sample preparation mould
Sand sample is prepared using the wet method of smashing in the cylinder hollow space that tool is formed, at the same solution steel hammer hit every time after real sample cannot be from
The difficult problem lifted in the narrow and small cylinder hollow space that inside and outside sampling die is formed, the sand such that it is able to obtain specific configuration is tried
Sample, is subsequently to carry out using hollow cylinder torsional shear instrument seminar structure（Particle arrangement mode）Impact to sand mechanical characteristic is provided
Good-quality sand soil sample.The device hits actual effect rate with raising, the features such as simple to operation.
Description of the drawings
Fig. 1 prepares the knot that actual load is put that hits of hollow cylinder sand sample for the wet method of smashing that the first embodiment of the invention is provided
Structure schematic diagram.
Top view schematic diagrames of the Fig. 2 for the pedestal and guide post in Fig. 1 in test cylinder.
Top view schematic diagrames of the Fig. 3 for the steel hammer and two fix bars in Fig. 1 in test cylinder.
Fig. 4 is the horizontal fine circle top view schematic diagram in Fig. 1.
Fig. 5 prepares the base that actual load is put that hits of hollow cylinder sand sample for the wet method of smashing that second embodiment of the invention is provided
The structure schematic top plan view of seat and guide post.
Fig. 6 is that the guide post in Fig. 5 puts the structure schematic top plan view after hammer.
Fig. 7 is the structure schematic top plan view after the hammer configuration annulus in Fig. 6.
Specific embodiment
With reference to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, the wet method of smashing that the first embodiment of the invention is provided prepares hollow cylinder sand
The actual load of hitting of soil sample is put, including pedestal 1 and hammer 2, the guide post 3 with multiple vertical distributions on the pedestal 1, and each is led
The hammer 2 of fan annular is socketed with bar 3, the annulus of fix bar 4, the upper end of fix bar 4 and cross direction profiles is fixed with hammer 2
5 are fixedly connected.In fan annular spread, the quantity of pedestal 1 has two and relative symmetry distribution, the guiding of the pedestal 1 to the pedestal 1
Correspondence is socketed with the matched hammer 2 of shape on bar 3.
With reference to shown in Fig. 5, Fig. 6, Fig. 7, second embodiment of the invention is essentially identical with the first embodiment, and difference only exists
In：The pedestal 1 in a ring, with annular gathering sill 6 on pedestal 1, is provided with guide ring 7, guide ring 7 in annular gathering sill 6
Can rotate in the annular gathering sill 6, the quantity of the correspondence hammer 2 is fixedly installed guide post 3 on guide ring 7, each
The hammer 2 is socketed with guide post 3.Two guide posts 3 are evenly distributed with the guide ring 7, on two guide posts 3 respectively
It is socketed with hammer 2.In the present embodiment, hammer 2 can be moved to change impact position on guide ring 3 along annular gathering sill 6,
Can be operated on the premise of not mobile device, using upper more convenient, and two hammers 2 are impacted in an entirety
On the circular base of structure, make accepting for sand more uniform.
Claims (4)
1. a kind of wet method of smashing prepares the actual load of hitting of hollow cylinder sand sample and puts, including pedestal and hammer, it is characterized in that：The base
Guide post with multiple vertical distributions on seat, is socketed with the hammer of fan annular on each guide post, be fixed with hammer solid
Fixed pole, fix bar upper end is fixedly connected with the annulus of cross direction profiles.
2. the wet method of smashing according to claim 1 prepares the actual load of hitting of hollow cylinder sand sample and puts, and it is characterized in that：The base
In fan annular spread, number of susceptors has two and relative symmetry distribution to seat, and correspondence is socketed with shape on the guide post of the pedestal
The matched hammer.
3. the wet method of smashing according to claim 1 prepares the actual load of hitting of hollow cylinder sand sample and puts, and it is characterized in that：The base
Seat in a ring, with annular gathering sill on pedestal, is provided with guide ring in annular gathering sill, guide ring can be oriented in the annular
Rotate in groove, the quantity of the correspondence hammer is fixedly installed guide post on guide ring, described hitting is socketed with each guide post
Hammer.
4. the wet method of smashing according to claim 3 prepares the actual load of hitting of hollow cylinder sand sample and puts, and it is characterized in that：It is described to lead
Two guide posts are evenly distributed with ring, on two guide posts hammer is respectively sleeved on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710024058.3A CN106644647A (en) | 2017-01-13 | 2017-01-13 | Compaction device for preparing hollow cylindrical sandy soil test sample with wet smashing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710024058.3A CN106644647A (en) | 2017-01-13 | 2017-01-13 | Compaction device for preparing hollow cylindrical sandy soil test sample with wet smashing method |
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| CN106644647A true CN106644647A (en) | 2017-05-10 |
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| CN201710024058.3A Pending CN106644647A (en) | 2017-01-13 | 2017-01-13 | Compaction device for preparing hollow cylindrical sandy soil test sample with wet smashing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871907A (en) * | 2018-08-31 | 2018-11-23 | 中国石油天然气股份有限公司 | It is hydraulic to shake sand device, shake sand system and method applied to the hydraulic of sandpack column |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101216387A (en) * | 2007-12-27 | 2008-07-09 | 浙江大学 | Hollow cylinder torsional shear apparatus remodeling sample compacting instrument |
| KR20110073798A (en) * | 2009-12-24 | 2011-06-30 | 재단법인 포항산업과학연구원 | Evaluation device for powdery mixture with binder |
| CN102288461A (en) * | 2011-05-12 | 2011-12-21 | 河海大学 | Large-sized hollow cylindrical sampler for coarse grained soil and use method thereof |
| CN202814770U (en) * | 2012-08-29 | 2013-03-20 | 中国科学院武汉岩土力学研究所 | Remolded soil sample preparation device for triaxial shear test |
| CN204255718U (en) * | 2014-11-20 | 2015-04-08 | 中国人民解放军后勤工程学院 | A kind of semi-automatic multifunction soil test pressure-like machine |
| CN205483741U (en) * | 2016-04-06 | 2016-08-17 | 三峡大学 | Compaction test device of cyclic annular sample of preparation remolded soil |
| CN206410906U (en) * | 2017-01-13 | 2017-08-15 | 温州大学 | The actual load of hitting that the wet method of smashing prepares hollow cylinder sand sample is put |
-
2017
- 2017-01-13 CN CN201710024058.3A patent/CN106644647A/en active Pending
Patent Citations (7)
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|---|---|---|---|---|
| CN101216387A (en) * | 2007-12-27 | 2008-07-09 | 浙江大学 | Hollow cylinder torsional shear apparatus remodeling sample compacting instrument |
| KR20110073798A (en) * | 2009-12-24 | 2011-06-30 | 재단법인 포항산업과학연구원 | Evaluation device for powdery mixture with binder |
| CN102288461A (en) * | 2011-05-12 | 2011-12-21 | 河海大学 | Large-sized hollow cylindrical sampler for coarse grained soil and use method thereof |
| CN202814770U (en) * | 2012-08-29 | 2013-03-20 | 中国科学院武汉岩土力学研究所 | Remolded soil sample preparation device for triaxial shear test |
| CN204255718U (en) * | 2014-11-20 | 2015-04-08 | 中国人民解放军后勤工程学院 | A kind of semi-automatic multifunction soil test pressure-like machine |
| CN205483741U (en) * | 2016-04-06 | 2016-08-17 | 三峡大学 | Compaction test device of cyclic annular sample of preparation remolded soil |
| CN206410906U (en) * | 2017-01-13 | 2017-08-15 | 温州大学 | The actual load of hitting that the wet method of smashing prepares hollow cylinder sand sample is put |
Non-Patent Citations (1)
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| 张泉芳;赵宇;黄博;吴刚兵;: "空心圆柱扭剪仪重塑样击实器的研制" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108871907A (en) * | 2018-08-31 | 2018-11-23 | 中国石油天然气股份有限公司 | It is hydraulic to shake sand device, shake sand system and method applied to the hydraulic of sandpack column |
| CN108871907B (en) * | 2018-08-31 | 2020-10-09 | 中国石油天然气股份有限公司 | Hydraulic sand shaking device, hydraulic sand shaking system applied to sand filling model and hydraulic sand shaking method |
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