CN108051264A - Owe consolidation remolding soft clay sample preparation device - Google Patents
Owe consolidation remolding soft clay sample preparation device Download PDFInfo
- Publication number
- CN108051264A CN108051264A CN201711233000.6A CN201711233000A CN108051264A CN 108051264 A CN108051264 A CN 108051264A CN 201711233000 A CN201711233000 A CN 201711233000A CN 108051264 A CN108051264 A CN 108051264A
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- external mold
- internal model
- remolding
- preparation device
- consolidation
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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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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses one kind to owe consolidation remolding soft clay sample preparation device, it is both provided with to be caught in the external mold and the circular card slot of internal model on its pedestal and head cover, external mold and internal model are socketed and are respectively clamped into the circular card slot on the pedestal and head cover, on head cover at least three through holes are offered around external mold, through hole is corresponded on pedestal and offers threaded connection hole, screw rod is threadedly coupled with threaded connection hole through through hole and steps up the external mold and internal model, the internal model is directed on head cover and external mold offers loading hole, loading stent lower part is and annular loading matched at least three supporting rod of slot, in supporting rod insertion annular loading slot, post upper carries Loading Plate, the upper and lower side of annular soil sample between external mold and Inner moulds is lined with the drain bar of annular, drain bar carries drainage hole, water draining pass is carried on pedestal.Deficient consolidation remodeling bury sample preparation device provided by the invention can one-dimensional compression concretion state of the effective simulation underconsolidated soil in deposition process.
Description
Technical field
The present invention relates to a kind of one-dimensional deficient consolidations of experiment to remold bury sample preparation device, belongs to geotechnical engineering measuring instrument
Manufacturing technology field owes consolidation hollow cylinder soft clay sample suitable for making, and is placed on hollow cylinder torsional shear system
The middle experimental study for carrying out soil.
Background technology
The geotechnical testament in geotechnical engineering field is the main means for obtaining soil body physical and mechanical parameter.In geotechnical testament,
According to National Standard of the People's Republic of China《Standard for test methods of earthworks》（GB/T 50123-1999）, it is necessary first to take section
Specification, effective method are learned to obtain and prepare soil sample.This is also so that obtaining the various objects of the soil body during follow-up test
Managing mechanics parameter has the important guarantee of higher confidence level, and provides directive function for further prospecting, design, construction.Together
When, the present invention tests for indoor unit body, to soil sample initial acquisition and the requirement higher made, develops a set of science, essence
Good and specification sample preparation device is often that experimental study is successfully basic.
Soil body sample generally comprises undisturbed sample, disturbance soil sample and remolding soil specimens.Manipulated soil is one kind between original
Soil sample between shape soil and disturbed soil, it is by disturbed soil, passes through the experiment soil of artificial.Its specific definition can
To be expressed as：Manipulated soil is moulded by manually autotelic, has the disturbed soil that emulation undisturbed soil sees fundamental characteristics in vitro
Structure is a kind of experiment soil body for being applied to realize certain test purpose.At present, manipulated soil has obtained more in geotechnical testament
Extensive to use, reason is：First, compared with the acquisition of undisturbed soil, sample preparation cost is relatively low；It secondly, can be effective
Avoid test error caused by replacing undisturbed soil progress geotechnical testament possible using complete disturbed soil；Furthermore manipulated soil have compared with
Good uniformity in comparison process is carried out to test result, can obtain the result of the test of more comparativity and regularity, this
To find to provide the foundation with Rule Summary in scientific research.Therefore, using remolding soil specimens be substantially better than undisturbed sample and
Disturb soil sample.
At present, geotechnological laboratory test is almost limited to the research of overconsolidated soil, relatively small to the degree of consolidation there are no occurring
The different degrees of consolidation underconsolidated soil research.To find out its cause, be due to owe consolidation soft clay acquisition and preparation process more
Complicated and big difficulty reason.And the present invention can preferably solve the problems, such as to owe the preparation of consolidation soft clay so that geotechnical testament
Technology develops to more extensive underconsolidated soil field.
In addition, hollow cylinder sample needed for hollow torsion shear test, be usually all using hit the method smash or cut come
It prepares.The former is difficult to ensure that the requirement of the saturation degree of soil sample, uniformity etc.；And the latter is emptied by inside and external cutting
Mode, it is very big to the disturbance of molded soil sample, and can also there are the non-uniform phenomenon of water content, especially the degree of consolidation compared with
In low soft clay sample preparation process.Therefore, there is an urgent need for a kind of directly making and one-time formed sample preparation devices.Apparatus of the present invention are proper
Can solve this stubborn problem well, since meet the hollow torsion shear test demand increased increasingly.
The content of the invention
In view of insufficient existing for background technology, the technical problems to be solved by the invention are to provide one kind can be effective
One-dimensional compression concretion state of the simulation underconsolidated soil in deposition process deficient consolidation remodeling bury sample preparation device.
The present invention adopts the following technical scheme that complete：Consolidation remolding soft clay sample preparation device is owed, it is characterized in that：Bag
Pedestal, external mold, internal model, external support, head cover and loading stent are included, is both provided with to be caught on the pedestal and head cover described
The circular card slot of external mold and internal model, the external mold and internal model are socketed and are respectively clamped into the circular card slot on the pedestal and head cover
In, at least three through holes are offered around external mold on the head cover, through hole is corresponded on the pedestal and offers threaded connection hole, spiral shell
Bar is threadedly coupled with threaded connection hole through through hole and steps up the external mold and internal model, and the internal model and outer is directed on the head cover
Mould offers loading hole, and the loading stent lower part is and annular loading matched at least three supporting rod of slot, supporting rod
In insertion annular loading slot, the post upper carries Loading Plate, above and below the annular soil sample between the external mold and Inner moulds
End is lined with the drain bar of annular, and drain bar carries drainage hole, water draining pass is carried on the pedestal.
The original state of conventional specimen is to be placed in test apparatus（Such as hollow cylinder torsional shear instrument）In carry out experiment grind
The basis studied carefully, sample whether can real simulation state of soil directly influence the precision of experiment, the present invention, which provides, owes consolidation
Remolding soft clay sample preparation device is loaded by counterweight ballast, can one-dimensional pressure of the effective simulation soil body in deposition process
Contracting consolidation.When loading every grade of load so that soil sample pressure stable and uniform, it is visual, can survey, controllably, overcome existing one
It is a little to use suction vacuum etc. and the engineering method that soil body deposition process stress consolidation form is not consistent in practice, and need not consume
Electric energy.Also, the relevant parameter that can be measured during experiment has load, consolidation time, displacement of volume, consolidating settlement
Amount etc. can respectively obtain the initial void ratio with after shaping of the soil body by deriving, then analyze its relation between consolidation time,
And then more it is accurately determined the degree of consolidation of sample.
Description of the drawings
The present invention has drawings described below：
Fig. 1 is the structure diagram that the present invention owes consolidation remolding soft clay sample preparation device；
Fig. 2 is the structure diagram of the pedestal in Fig. 1；
Fig. 3 is the structure diagram of the external mold in Fig. 1；
Fig. 4 is the structure diagram of the internal model in Fig. 1；
Fig. 5 is the structure diagram of the external support in Fig. 1；
Fig. 6 is the structure diagram of the cap structure in Fig. 1；
Fig. 7 is the structure diagram of the permeable stone and cranse in Fig. 1.
Specific embodiment
Attached drawing illustrates technical scheme and embodiment, further describes embodiment in conjunction with attached drawing below
Each related details and its operation principle.
With reference to shown in Fig. 1-7, deficient consolidation remolding soft clay sample preparation device provided by the invention, agent structure includes pedestal
1st, external mold 2, external mold cranse 7, internal model 3, external support 4, head cover 5, loading stent 6, upper drain bar 8, lower drain bar 8 and draining are led to
Road 9.Each component of the present apparatus is described in detail one by one by order from top to bottom below.
With reference to shown in Fig. 2, pedestal 1 is made of stainless steel, thickness 50mm.It is internally provided with water draining pass（Directly
Footpath is 4mm, for penetrating into the water inside card slot during venting experiment）, circular card slot（Enter pedestal for the grafting of inside and outside mould bottom
It is interior）With four circular bolt holes（It is screwed into wherein for the lower screw of external support）, while also play fixation.
With reference to shown in Fig. 3, external mold 2：It is formed by three pieces rigid transparent petal is ratcheting（It is observed that soil sample during experiment
Consolidation deformation, have visual effect）, the central angle per petal is 120 °.Before sample is filled, the inner wall of external mold is using smooth
Permeable gauze is around upper one circle, for the vertical drainage of soil sample, the frictional force in reduction between drain bar 8 and external mold inner wall, simultaneously
When removing external mold so as to the later stage, reduce the disturbance to molded soil sample as far as possible.The outside of external mold by three cranses point it is upper,
In, lower three position bandings fix.
, with reference to shown in Fig. 4, internal model 3：It is put together by two petals, the central angle per petal is 180 °.On internal model die wall
Even is embedded with the vertical permeable stone of multi-disc, and the central angle of every permeable stone is 30 ° so that soil sample laterally accelerates draining, Fast Compression
Consolidation shaping, so as to shorten the sample preparation time.It is also smooth saturating around upper one circle on the outer wall of internal model as the inner wall of external mold
Water gauze, so that the later stage removes internal model and reduces upper frictional force between drain bar 8 and internal model outer wall.
With reference to shown in Fig. 5, external support 4：For four root long screw rods, head cover is passed through, stretches into pedestal and passes through above and below
Bolt screws, so that the fixation between inside and outside mould, head cover and pedestal.
With reference to shown in Fig. 6, head cover 5：It is internally provided with four oval-shaped passageways（Ellipse short shaft is slightly larger than loading stent lower part
Supporting rod diameter, for it without frictionally passing through）, circular card slot（Enter for grafting at the top of inside and outside mould in head cover）And spiral shell
Keyhole road（It is passed through for external support screw rod）, while also play fixation.
With reference to shown in Fig. 1, Fig. 7, upper drain bar 8 and lower drain bar 8 are respectively provided at the top and bottom of soil sample, it is internal
The even drainage channel for being equipped with a diameter of 0.5mm makes soil sample upper and lower surface Quick drainage as far as possible.Uniform soil is prepared being packed into
Before sample mud, lower drain bar is first installed, the smooth permeable gauze of lastblock annular is padded in the upper surface of lower drain bar, to prevent
Mud is penetrated into drainage channel, is resulted in blockage.Then, inside and outside mould is installed and fixed by foregoing method.Then, mud is injected
Slurry, puts drain bar, equally to put the smooth permeable gauze of lastblock annular in the lower surface of upper drain bar here.Finally,
Top cover, fixed external support, dress sample are completed, and wait for subsequent loading consolidation forming step.
With reference to shown in Fig. 1, stent 6 is loaded：Its underpart is four cylindrical support bars（Its upper part is carved with scale, to be used for
Measure the vertical deformation of soil sample compression concretion）, upper load is transferred on the top of soil sample on drain bar, makes soil sample pressure
Contracting consolidation shaping.It is Loading Plate that its upper part is connected with supporting rod, and counterweight is loaded for stacking.Explanation is needed exist for, is added
The mode of load can be oil pressure, air pressure or motor loading, as long as the load of loading can uniformly be acted on from loading frame upper
In on upper drain bar, you can realize the consolidation shaping of soil sample.
With reference to shown in Fig. 7：External mold cranse 6 is 3 rings, and end screwed by bolt so that external mold be able to it is ratcheting solid
It is fixed.
It is shown in reference picture 1, Fig. 2, drainage channel 9, arranged on the lower part of pedestal, during collecting and discharging soil sample test
The water discharged in water draining pass out of pedestal, since measure soil sample compression concretion forming process in displacement of volume.
Embodiments described above is a kind of preferred version of the present invention, however, it is not intended to limiting the invention,
The technical solution that all modes taken equivalent transformation or replaced on an equal basis are obtained, all falls in protection scope of the present invention.
Claims (9)
1. one kind owes consolidation remolding soft clay sample preparation device, it is characterized in that：Including pedestal, external mold, internal model, external support, head cover
With loading stent, it is both provided with to be caught in the external mold and the circular card slot of internal model, the external mold on the pedestal and head cover
It is socketed and is respectively clamped into the circular card slot on the pedestal and head cover with internal model, offered at least around external mold on the head cover
Three through holes correspond to through hole on the pedestal and offer threaded connection hole, and screw rod is threadedly coupled through through hole with threaded connection hole
And step up the external mold and internal model, and the internal model is directed on the head cover and external mold offers loading hole, it is described to load under stent
Portion is to load matched at least three supporting rod of slot with the annular, and supporting rod is inserted into annular loading slot, on the supporting rod
With Loading Plate, the upper and lower side of the annular soil sample between the external mold and Inner moulds is lined with the drain bar of annular, drain bar band at end
There is drainage hole, water draining pass is carried on the pedestal.
2. deficient consolidation remolding soft clay sample preparation device according to claim 1, it is characterized in that：The loading hole is on head cover
Four oval-shaped passageways being provided with.
3. deficient consolidation remolding soft clay sample preparation device according to claim 1 or 2, it is characterized in that：The external mold is by three pieces
Rigid transparent petal is ratcheting to be formed, and the central angle per petal is 120 °, and upper, middle and lower are divided in the outside of the external mold by three cranses
Three position bandings are fixed.
4. deficient consolidation remolding soft clay sample preparation device according to claim 1 or 2, it is characterized in that：The internal model is by two valves
Mould is put together, and the central angle per petal is 180 °, uniformly embedded with the vertical permeable stone of multi-disc, every permeable stone on internal model die wall
Central angle be 30 °.
5. deficient consolidation remolding soft clay sample preparation device according to claim 3, it is characterized in that：The internal model is spelled by two petals
It closes, the central angle per petal is 180 °, uniformly embedded with the vertical permeable stone of multi-disc, the circle of every permeable stone on internal model die wall
Heart angle is 30 °.
6. deficient consolidation remolding soft clay sample preparation device according to claim 1 or 2, it is characterized in that：Band on the supporting rod
There is scale for measuring the vertical deformation of soil sample compression concretion.
7. deficient consolidation remolding soft clay sample preparation device according to claim 3, it is characterized in that：With quarter on the supporting rod
It spends to measure the vertical deformation of soil sample compression concretion.
8. deficient consolidation remolding soft clay sample preparation device according to claim 4, it is characterized in that：With quarter on the supporting rod
It spends to measure the vertical deformation of soil sample compression concretion.
9. deficient consolidation remolding soft clay sample preparation device according to claim 5, it is characterized in that：With quarter on the supporting rod
It spends to measure the vertical deformation of soil sample compression concretion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711233000.6A CN108051264A (en) | 2017-11-30 | 2017-11-30 | Owe consolidation remolding soft clay sample preparation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711233000.6A CN108051264A (en) | 2017-11-30 | 2017-11-30 | Owe consolidation remolding soft clay sample preparation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108051264A true CN108051264A (en) | 2018-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711233000.6A Pending CN108051264A (en) | 2017-11-30 | 2017-11-30 | Owe consolidation remolding soft clay sample preparation device |
Country Status (1)
| Country | Link |
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| CN (1) | CN108051264A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141572A (en) * | 2020-02-26 | 2020-05-12 | 长安大学 | Pre-consolidation device and method for floating type remolded soft clay |
| CN112985934A (en) * | 2021-01-28 | 2021-06-18 | 浙江工业大学 | Remolded soil sample preparation device and sample preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216387A (en) * | 2007-12-27 | 2008-07-09 | 浙江大学 | Hollow cylinder torsional shear apparatus remodeling sample compacting instrument |
| CN101738337A (en) * | 2009-12-09 | 2010-06-16 | 中国矿业大学 | Quick preparation device and method of saturated soil sample |
| CN103900872A (en) * | 2014-03-18 | 2014-07-02 | 河海大学 | Vacuum preload preparing device and method of remolding soft clay hollow cylinder sample |
| CN105784444A (en) * | 2016-03-21 | 2016-07-20 | 浙江大学 | Indoor apparatus and method for producing hollow cylindrical remolded clay specimen by compressing |
| CN206387619U (en) * | 2016-12-19 | 2017-08-08 | 长安大学 | Remoulded sample sample preparation device |
-
2017
- 2017-11-30 CN CN201711233000.6A patent/CN108051264A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101216387A (en) * | 2007-12-27 | 2008-07-09 | 浙江大学 | Hollow cylinder torsional shear apparatus remodeling sample compacting instrument |
| CN101738337A (en) * | 2009-12-09 | 2010-06-16 | 中国矿业大学 | Quick preparation device and method of saturated soil sample |
| CN103900872A (en) * | 2014-03-18 | 2014-07-02 | 河海大学 | Vacuum preload preparing device and method of remolding soft clay hollow cylinder sample |
| CN105784444A (en) * | 2016-03-21 | 2016-07-20 | 浙江大学 | Indoor apparatus and method for producing hollow cylindrical remolded clay specimen by compressing |
| CN206387619U (en) * | 2016-12-19 | 2017-08-08 | 长安大学 | Remoulded sample sample preparation device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111141572A (en) * | 2020-02-26 | 2020-05-12 | 长安大学 | Pre-consolidation device and method for floating type remolded soft clay |
| CN111141572B (en) * | 2020-02-26 | 2023-10-31 | 长安大学 | Pre-consolidation device and method for floating remolded soft clay |
| CN112985934A (en) * | 2021-01-28 | 2021-06-18 | 浙江工业大学 | Remolded soil sample preparation device and sample preparation method thereof |
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Application publication date: 20180518 |
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| RJ01 | Rejection of invention patent application after publication |