CN203069424U - Free expansion saturator of tri-axial specimen - Google Patents
Free expansion saturator of tri-axial specimen Download PDFInfo
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- CN203069424U CN203069424U CN 201320016960 CN201320016960U CN203069424U CN 203069424 U CN203069424 U CN 203069424U CN 201320016960 CN201320016960 CN 201320016960 CN 201320016960 U CN201320016960 U CN 201320016960U CN 203069424 U CN203069424 U CN 203069424U
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- pull bar
- bow
- mould
- rock
- wall
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Abstract
The utility model belongs to the technical field of a test device in a geotechnical engineering room, and in particular discloses a free expansion saturator of a tri-axial specimen. The saturator is suitable for saturating the tri-axial specimen in an expansive rock/soil room. On the basis of the prior art, the free expansion saturator of the tri-axial specimen is mainly characterized in that 1. an arch leaf spring is additionally arranged between a draw bar and a round mold; and 2. the splicing way of three petals of the traditional round mold is optimized for splicing the concave surfaces on the inner wall and the outer wall, and a spliced surface is a slidable arc slide surface. Through the improvement, the round mold can be expanded along the volume expansion process of the rock/soil specimen so as to always maintain that the inner wall of the round mold can be closely attached to the outer wall of the specimen, and the disintegration or falling of the rock/soil specimen in the saturation process can be avoided.
Description
Technical field
The utility model relates to Geotechnical Engineering shop experiment proving installation technical field, is specifically related to a kind of three sample free expansion saturators, and this saturator is applicable to the saturated preparation of indoor three samples of expansive rock/soil.
Background technology
Indoor triaxial test is technological means commonly used in Geotechnical Engineering construction and the scientific research, is to obtain reliable ground body physical and mechanical parameter, provides the important evidence of correct decisions for Geotechnical Engineering designs and constructs.Code requirement is for the Geotechnical Engineering of carrying out under complex geological condition, and when obtaining the rock mechanical parameter index, palpus is according to the result of indoor triaxial test.At present, conventional indoor triaxial test sample is cylindrical sample, is carrying out sample when saturated, and what adopt usually is the saturator (seeing accompanying drawing 1) that has comprised base, fixed head, footstock, clamping plate, pull bar, permeable stone, circle mould and lock ring.
Wherein, circular base is an one-piece construction with the fixed head that is used for steady brace, and three fixed heads are distributed on the periphery of base;
Wherein, circular footstock and clamping plate are an one-piece construction, and three clamping plate are distributed on the periphery of footstock;
Wherein, circular permeable stone has two, and a slice respectively is installed in base and the footstock, is used for being pressed in bottom and the top of three axial cylindrical shape rock/earth samples, and guarantees that bottom and the top of sample are permeable, and it is saturated to be convenient to the sample suction;
Wherein, the circle mould is spliced by three plate shapes and the identical lobe mould of size, and the Mosaic face of each lobe mould is plane and coplanar with the axis of circle mould;
Wherein, circular lock ring is used for clamping the circle mould, makes its splicing closely, does not stay the slit.
This saturator can be used for the saturated preparation of three rock sample/earth samples of great majority, but has the expansion gesture and soil body volume change is subjected to the very big great soil group of moisture content immersion effect then to have the shortcoming that is difficult to overcome for similar expansive rock/native inside.As: (1) expansive rock/native mineralogical composition is based on smectite, ground body volume is subjected to the moisture variable effect remarkable, the free swelling rate of strong swelled ground can be up to 160%, inherent bulging force can be up to 1.8MPa, if adopt common saturator to carry out saturated to three samples, be subjected to deformation constrain, bulging force can cause the deformed damaged of saturator; Simultaneously, rock/three sample peripheries of soil contact imbibition with water at first, because being subjected to deformation constrain, make the low expansive rock/soil sample (10 of perviousness originally
-6Cm/s～10
-8Cm/s) infiltration coefficient is lower, thereby causes saturated being difficult to evenly of whole sample immersion, and saturated needs for a long time; (2) expansive rock/soil sample that adopts common saturator to prepare, because being subjected to deformation constrain, the volume of the rock/soil sample of saturated front and back and density are known in saturator, and in case from saturator, take out, put into when triaxial test is indoor to be tested, soil sample changes into from the constraint that is subjected to circular lobe mould and is subjected to the India rubber modular constraint, the expansion gesture is released, soil sample can continue to produce dilatational strain in the process of triaxial shear test, the original state that not only causes sample changes, but also the sample body that can cause shear test becomes and the dilatational strain of sample self is difficult to distinguish, and causes test findings to analyze.Therefore, must develop and a kind ofly can allow expansive rock/soil sample saturated saturator that fully absorbs water, and treat that its volumetric expansion is to the taking-up of stable back, again cutting recovers original three sample sizes, recalculate the initial density of rock/soil sample again, then carry out triaxial shear test, can overcome the defective of above-mentioned traditional saturator, satisfy the saturated preparation of expansive rock/three samples of soil.
At present, in practical operation, also have and do not adopt saturator and directly the naked water that places of three rock/soil samples of machine-shaping is carried out saturated method, though the expansion of rock/soil sample is unfettered in this method, but because expansive rock/soil sample has many fissurities and meets water-destructible property, the sample disintegration can occur in the saturated process of soaking or come off, cause sample to damage.
The utility model content
At the deficiencies in the prior art, the purpose of this utility model is to provide a kind of three sample free expansion saturators, it is a kind of saturator that is applicable to indoor three specimen preparations of expansive rock/soil, this saturator can make that sample free expansion is saturated to absorbing water, distortion is stable, and not disintegration, easy to operate, the rock of preparing/earth sample original state is clear and definite, can satisfy the needs of triaxial shear test after cutting.
To achieve these goals, the utility model has been taked following technical measures:
A kind of three sample free expansion saturators, comprise base, fixed head, footstock, clamping plate, pull bar, permeable stone and circle mould, pull bar is provided with three, three pull bars all are connected on the fixed head by the chain bar, the circle mould is spliced by three plate shapes and the identical lobe mould of size, it is characterized in that: between every pull bar and every lobe mould, be provided with the bow-shaped shrapnel that sagitta is 2-8cm, described bow-shaped shrapnel middle part is blank, blank width is consistent with the diameter of pull bar, to guarantee that pull bar can pass from bow-shaped shrapnel blank, the top screw mandrel partial-length of described pull bar is 3-5cm, be convenient to fixing and the installation bow-shaped shrapnel, the screw mandrel bottom, top of described pull bar is provided with a nut, is used for fixedly bow-shaped shrapnel, and the vault of described bow-shaped shrapnel withstands round mould.Described bow-shaped shrapnel makes rock/earth sample circle mould in the volumetric expansion process can keep being close to of circle mould inwall and sample outer wall all the time, has avoided the disintegration of rock/earth sample or comes off.
Further, the both sides straight flange of forming three lobe moulds of circle mould is respectively equipped with outer wall concave surface and inwall concave surface, wherein three lobe moulds are seamless spliced by outer wall concave surface and inwall concave surface between any two, and Mosaic face is smooth arc sliding surface, and described arc sliding surface makes rock/earth sample circle mould in the volumetric expansion process to expand in the volumetric expansion process with rock/earth sample.
Further, the waist outer wall of three lobe moulds is equipped with a circle mould groove, and circle mould groove is over against pull bar, and the width of circle mould groove is consistent with the width of bow-shaped shrapnel, and the vault of bow-shaped shrapnel is arranged in round mould groove, therefore can play the guide effect to bow-shaped shrapnel.
Compared with prior art, advantage of the present utility model and beneficial effect are:
Simple in structure, easy for installation, processing ease, good stability only needs make improvements slightly on the basis of three sample saturators of tradition, both can satisfy the saturated preparation demand of all kinds of unexpansive or swelling property rock/earth samples, enlarged the scope of application of traditional saturator, the major advantage of bow-shaped shrapnel is to utilize the elasticity of himself, guarantees rock/earth sample in suction volume expansion process, and three inwalls that improved the lobe mould of structure are close to sample all the time.
Description of drawings
Fig. 1 is the prior art constructions synoptic diagram;
Fig. 2 is the structural representation of a kind of three sample free expansion saturators of the present utility model;
Fig. 3 is the cross-sectional structure synoptic diagram of circle mould;
Fig. 4 is for forming the lobe mode configuration synoptic diagram of circle mould;
Fig. 5 is the main TV structure synoptic diagram of bow-shaped shrapnel.
Description of reference numerals is as follows:
1. footstock;
2. clamping plate;
3. base;
4. fixed head;
5. permeable stone;
6. chain bar;
7. pull bar;
8. justify mould;
9. lock ring;
10. bow-shaped shrapnel;
11. circle mould groove;
12. ear shape nut;
13. nut;
14. lobe mould;
15. outer wall concave surface;
16. inwall concave surface;
17. arc sliding surface.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done further to elaborate, in order to understand the utility model with those skilled in the art know that.
Embodiment 1:
As Fig. 2-shown in Figure 5, a kind of three sample free expansion saturators, comprise base 3, fixed head 4, footstock 1, clamping plate 2, pull bar 7, permeable stone 5 and circle mould 8, pull bar 7 is provided with three, three pull bars 7 all are connected on the fixed head 4 by chain bar 6, circle mould 8 is spliced by three plate shapes and the identical lobe mould 14 of size, it is characterized in that: between every pull bar 7 and every lobe mould 14, be provided with the bow-shaped shrapnel 10 that sagitta is 2-8cm, described bow-shaped shrapnel 10 middle parts are blank, blank width is consistent with the diameter of pull bar 7, to guarantee that pull bar 7 can pass from bow-shaped shrapnel 10 blank, the top screw mandrel partial-length of described pull bar 7 is 3-5cm, so that fixing and installation bow-shaped shrapnel 10, the screw mandrel bottom, top of described pull bar 7 is provided with a nut 13, is used for fixedly bow-shaped shrapnel 10;
The both sides straight flange of forming three lobe moulds 14 of circle mould 8 is respectively equipped with outer wall concave surface 15 and inwall concave surface 16, wherein three lobe moulds 14 are seamless spliced by outer wall concave surface 15 and inwall concave surface 16 between any two, and Mosaic face is smooth arc sliding surface 17, described arc sliding surface 17 makes rock/earth sample circle mould 8 in expansion process to expand together and can keep all the time being close to of circle mould 8 inwalls and sample outer wall with it, has avoided the disintegration of rock/earth sample or comes off;
The waist outer wall of three lobe moulds 14 is equipped with a circle mould groove 11, circle mould groove 11 is over against pull bar 7, the width of circle mould groove 11 is consistent with the width of bow-shaped shrapnel 10, and the waist of bow-shaped shrapnel 10 is arranged in round mould groove 11, therefore can play the guide effect to bow-shaped shrapnel 10;
The lower end of bow-shaped shrapnel 10 is wound on the chain bar 6 on the fixed head 4, keeps it to rotate;
The blank part of the upper center of bow-shaped shrapnel 10 is passed the screw mandrel of pull bar 7, and fixing by nut 13.
During practical application, before the immersion of rock/earth sample, remove lock ring 9, upwards screw and unclamp ear shape nut 12, reserve the sample expansion clearance that makes progress, footstock 1 can be moved by easy on and off in the gap; Suitably unclamp nut 13 downwards, make bow-shaped shrapnel 10 upper ends be in active state, after rock/native three axial cylindrical shape samples immersion is expanded, but axially because reserving expansion clearance free expansion, be radially expanded and make each lobe mould 14 of circle mould 8 outwards strut, extruding bow-shaped shrapnel 10 and being out of shape is under the elastic force effect of bow-shaped shrapnel 10, the inwall of circle mould 8 is close to rock/soil sample outer wall all the time, has guaranteed the not disintegration in the immersion saturation history of rock/earth sample, has come off.
Above-mentioned specific embodiment is a kind of optimal technical scheme of the present utility model; be not to limit enforcement of the present utility model and claim protection domain; all equivalences of making according to the described content of the utility model patent protection scope change and modify, and all should be included in the utility model claim.
Claims (3)
1. one kind three sample free expansion saturators, comprise base, fixed head, footstock, clamping plate, pull bar, permeable stone and circle mould, pull bar is provided with three, three pull bars all are connected on the fixed head by the chain bar, the circle mould is spliced by three plate shapes and the identical lobe mould of size, it is characterized in that: between every pull bar and every lobe mould, be provided with the bow-shaped shrapnel that sagitta is 2-8cm, described bow-shaped shrapnel middle part is blank, blank width is consistent with the diameter of pull bar, the top screw mandrel partial-length of described pull bar is 3-5cm, the screw mandrel bottom, top of described pull bar is provided with a nut, and the vault of described bow-shaped shrapnel withstands round mould.
2. three sample free expansion saturators as claimed in claim 1, it is characterized in that: the both sides straight flange of three lobe moulds of described composition circle mould is respectively equipped with outer wall concave surface and inwall concave surface, wherein three lobe moulds are seamless spliced by outer wall concave surface and inwall concave surface between any two, and Mosaic face is smooth arc sliding surface.
3. three sample free expansion saturators as claimed in claim 1 or 2, it is characterized in that: the waist outer wall of described three lobe moulds is equipped with a circle mould groove, circle mould groove is over against pull bar, and the width of circle mould groove is consistent with the width of bow-shaped shrapnel, and the vault of bow-shaped shrapnel is arranged in round mould groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016960 CN203069424U (en) | 2013-01-14 | 2013-01-14 | Free expansion saturator of tri-axial specimen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320016960 CN203069424U (en) | 2013-01-14 | 2013-01-14 | Free expansion saturator of tri-axial specimen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203069424U true CN203069424U (en) | 2013-07-17 |
Family
ID=48768198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320016960 Expired - Fee Related CN203069424U (en) | 2013-01-14 | 2013-01-14 | Free expansion saturator of tri-axial specimen |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258995A (en) * | 2015-10-23 | 2016-01-20 | 中国科学院力学研究所 | Soft soil sample loading device in triaxial apparatus experiments |
| CN105445167A (en) * | 2015-12-29 | 2016-03-30 | 常熟市徐润机电有限公司 | Saturator |
| CN107625257A (en) * | 2017-11-10 | 2018-01-26 | 安徽冠宜箱包有限公司 | A kind of Inner extrusion securing device for travelling draw-rod suitcase |
| CN109187138A (en) * | 2018-10-12 | 2019-01-11 | 天津城建大学 | A kind of portable true triaxil tester soil saturation device and detection method |
| CN109270247A (en) * | 2018-10-22 | 2019-01-25 | 安徽省（水利部淮河水利委员会）水利科学研究院（安徽省水利工程质量检测中心站） | A kind of fixed device of rock expansion test sample and its fixing means |
| CN111948377A (en) * | 2020-08-18 | 2020-11-17 | 南京信息工程大学 | Rock-soil triaxial free expansion instrument |
| CN113218735A (en) * | 2021-05-10 | 2021-08-06 | 昆明理工大学 | Triaxial test saturated sample loading method for soil |
-
2013
- 2013-01-14 CN CN 201320016960 patent/CN203069424U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105258995A (en) * | 2015-10-23 | 2016-01-20 | 中国科学院力学研究所 | Soft soil sample loading device in triaxial apparatus experiments |
| CN105258995B (en) * | 2015-10-23 | 2018-04-27 | 中国科学院力学研究所 | A kind of weak soil dress sampling device in triaxial apparatus experiment |
| CN105445167A (en) * | 2015-12-29 | 2016-03-30 | 常熟市徐润机电有限公司 | Saturator |
| CN107625257A (en) * | 2017-11-10 | 2018-01-26 | 安徽冠宜箱包有限公司 | A kind of Inner extrusion securing device for travelling draw-rod suitcase |
| CN109187138A (en) * | 2018-10-12 | 2019-01-11 | 天津城建大学 | A kind of portable true triaxil tester soil saturation device and detection method |
| CN109270247A (en) * | 2018-10-22 | 2019-01-25 | 安徽省（水利部淮河水利委员会）水利科学研究院（安徽省水利工程质量检测中心站） | A kind of fixed device of rock expansion test sample and its fixing means |
| CN111948377A (en) * | 2020-08-18 | 2020-11-17 | 南京信息工程大学 | Rock-soil triaxial free expansion instrument |
| CN111948377B (en) * | 2020-08-18 | 2023-02-14 | 南京信息工程大学 | Rock-soil triaxial free expansion instrument |
| CN113218735A (en) * | 2021-05-10 | 2021-08-06 | 昆明理工大学 | Triaxial test saturated sample loading method for soil |
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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 |
Granted publication date: 20130717 Termination date: 20160114 |