CN204495823U - A kind of new soil is radially expanded rate tester - Google Patents

A kind of new soil is radially expanded rate tester Download PDF

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Publication number
CN204495823U
CN204495823U CN201520078783.5U CN201520078783U CN204495823U CN 204495823 U CN204495823 U CN 204495823U CN 201520078783 U CN201520078783 U CN 201520078783U CN 204495823 U CN204495823 U CN 204495823U
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CN
China
Prior art keywords
ring
radially expanded
test
soil
sample
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CN201520078783.5U
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Chinese (zh)
Inventor
李术才
贺鹏
李利平
林春金
杨为民
张乾青
许振浩
石少帅
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山东大学
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Priority to CN201520078783.5U priority Critical patent/CN204495823U/en
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Publication of CN204495823U publication Critical patent/CN204495823U/en

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Abstract

The utility model relates to a kind of new soil and is radially expanded rate tester, by formulating annular test-piece, by displacement measurement equipment placement in test specimen inner ring, thus mensuration is radially expanded rate therein, changes the traditional mode in the past measuring soil expansion distortion outside test specimen; Annular test-piece external frame hoop, testing tool is placed in inner ring, overcome routine be radially expanded rate measure in testing tool lay and rigidity cutting ring side limit between contradiction, break away from the dependence to flexible consolidometer and different-stiffness consolidation ring, avoid the problem of rigidity test precision and complicated operation, make fast simple, convenient; By the improvement of water filling device is made moisture can only from upper and lower two ends gradually to centre infiltration, ensure that the phenomenons such as the tested soil body of inner ring defeated and dispersed, disintegration does not occur, falls block, softening.The frame mounting be made up of base, upper cover, screw rod, bolt can fix vertical displacement in process of the test, prevents sample from producing vertical dilatational strain, ensures measuring accuracy.

Description

A kind of new soil is radially expanded rate tester

Technical field

The utility model relates to a kind of new device being radially expanded rate mensuration for soil.

Background technology

Swelled ground is widely distributed in China as a kind of Special Rock, seriously constrains China's infrastructure construction, and meanwhile, as desirable nuclear waste buffer backfill material, the mensuration of its bulging force and dilatational strain seems particularly important.The method of testing that existing specification adopts is mainly expansion back-pressure method, pressurized expansion method and balance pressurization method, these test methods are merely able to test vertical swelling pressure under the limit condition of side and dilatational strain, and for there being the situation of radial direction or lateral shift in engineering in the urgent need to the permission soil body obtained, but cannot its expansivity of Accurate Determining.

Recent domestic expert and scholars improve and have developed the flexible consolidometer based on the exploitation of different consolidation ring stiffness, but when being radially expanded rate test, in testing tool test specimen lay and rigidity cutting ring side limit between there is contradiction, and to flexible consolidometer and different-stiffness consolidation ring Existence dependency, thus measuring accuracy is made to be difficult to ensure.

Utility model content

The purpose of this utility model is not enough for overcoming above-mentioned prior art, provide a kind of structure form simple, test respond well, with low cost, simple to operate, the soil body of widespread use can be radially expanded rate tester.

For achieving the above object, the utility model adopts following technical proposals:

A kind of new soil is radially expanded rate tester, and comprise water container, water container is built-in with frame mounting; The base of described frame mounting is placed from lower to upper successively bottom permeable stone, ring-type filter paper, large scale cutting ring with soil body ring-shaped sample, ring-type filter paper and ring-type permeable stone, the ring of described ring-type permeable stone is built-in with the circular glass of uniform thickness; Described large scale cutting ring overcoat has the collar; The upper cover of described frame mounting is placed on ring-type permeable stone, is connected between upper cover with base by vertical stationary installation, and it is tight that stationary installation gives each component contact that upper cover certain pressure makes frame mounting inside, to limit the vertical deformation of sample; The inside of described ring-shaped sample is placed with small-sized displacement meter, described displacement meter is placed in the vertical central axis place of ring-shaped sample, its two ends gauge head is along the inwall of the diametric(al) touching sample of ring-shaped sample, ring-shaped sample soak backward inner side produce lateral expansion, built-in displacement meter can read the dilatational strain of generation; A hole corresponding to circular glass is stamped on described.

The inwall of described ring-shaped sample respectively posts a bullion pad along arbitrary diametric two ends, and described gauge head just touches metallic gasket middle part.

Described circular glass and ring-type permeable stone consolidation are integrated.

Described circular glass is nested within ring-type permeable stone, and the two fits like a glove.

The external diameter of described large scale cutter ring is 140mm, is highly 40mm.

The cushion block regulating height is placed with under described small-sized displacement meter.

Application said apparatus realizes measuring the rate that is radially expanded of sample, comprises the following steps:

(1). prepare the ring-shaped sample conformed to large scale cutting ring internal diameter;

(2). sample is installed in analyzer;

(3). water filling in water container, and record dilatational strain data;

(4). arrange result; What calculate any instant is radially expanded rate:

δ e = πr 2 - πr ′ 2 πR 2 - πr 2 × 100 = ( r + r ′ ) ( r - r ′ ) πR 2 - πr 2 × 100 ( r + r ′ ) ΔH πR 2 - πr 2 × 100

By deriving above, obtain δ e:

δ e = ( 2 r - ΔH ) ΔH R 2 - r 2 × 100

ΔΗ=H t-H 0

In formula: δ e---the rate that is radially expanded (%) of soil during t, is calculated to 0.1

Δ H---t sample expansion increment

H 0---displacement meter reading during on-test

H t---test t displacement meter reading

R---test specimen outer shroud radius (this device regulation test specimen external diameter 140mm)

R---test specimen inner ring radius (this device regulation test specimen internal diameter 61.8mm)

R '---t test specimen inner ring radius

Wherein, in step (1), first use large scale cutting ring to prepare column soil sample by Standard for test methods of earthworks, when cutting undisturbed soil sample, sample pressurized situation at the trial and natural soil layer should be made to receive lotus direction consistent; Then by two conventional cutting ring longitudinal stack, height of formation is the cutter ring of 40mm, cuts and excavates the equivalent soil body in large scale cutting ring soil sample centre, obtain soil body ring-shaped sample according to Standard for test methods of earthworks.

In step (2), the base of frame mounting is placed in water container, on base plate, places bottom permeable stone, filter paper, the collar successively, the large scale cutting ring edge of a knife with annular test-piece is placed among the collar down; Cushion block and small-sized displacement meter is placed successively, by small-sized displacement meter reading zero in annular test-piece inside; Above test specimen, overlay ring-type filter paper successively, be embedded with the annular permeable stone of circular glass; The upper cover of frame mounting is placed in above ring-type permeable stone, and is bolted, and give certain pressure to make each component contact tight.

In step (2), be fixed on the ring wall of annular test-piece inside by two bullion pads along arbitrary diametric(al), the gauge head at described displacement meter two ends just contacts with metallic gasket.

In step (3), pure water is injected water container, in water container, the water surface must flood top permeable stone; Initial time after record water filling, surveys note dial gauge reading at interval of 5min, till test specimen no longer expands, and record displacement meter reading.

The beneficial effects of the utility model are:

This device changes the traditional mode in the past measuring soil expansion distortion outside test specimen, by formulating annular test-piece, displacement tester is placed in test specimen inner ring, thus mensuration is radially expanded rate therein, changes the present situation that application conventional test device can only record vertical expansion ratio; In this method of operating, annular test-piece external frame hoop, proving installation is placed in inner ring, overcome existing be radially expanded rate measure in testing tool lay and rigidity cutting ring side limit between contradiction; Break away from the dependence to flexible consolidometer and different-stiffness consolidation ring, made fast simple, convenient; By the improvement to water filling device, make moisture can only from upper and lower two ends gradually to centre infiltration, and non-immediate enters annular test-piece annular inner portion, ensure that the phenomenons such as the inner ring tested soil body disintegration does not occur, falls block, softening; The frame mounting be made up of base, upper cover, screw rod, bolt can fix vertical displacement in process of the test, prevents sample from producing vertical dilatational strain, the accuracy of warranty test; Described large scale cutting ring height is 40mm, be two conventional cutting rings height and, be convenient to that inner earth pillar is excavated in two conventional cutting rings superpositions and form ring-shaped sample; The external diameter of described large scale cutting ring is 140mm, can be convenient to use the core making sample that internal diameter is the standard impact density instrument of 152mm, and the internal diameter of ring-shaped sample is the diameter of conventional cutting ring, i.e. 61.8mm, therefore uses the ring-shaped sample Sizes of this size.

1. the utility model change in existing test from test specimen peripheral test soil expansion distortion traditional mode, by the making of annular test-piece, overcome existing be radially expanded rate measure in testing tool lay and rigidity cutting ring side limit between contradiction;

2. the utility model achieves and can measure radial expansivity by means of only conventional chambers test unit, saves a large amount of costs and manpower compared to other radial testing tools, convenient and swift, simple to operate;

3. proving installation is creatively placed in inner ring by the utility model, has broken away from the dependence to flexible consolidometer and different-stiffness consolidation ring, has avoided the problem of rigidity test precision and complicated operation, and what also indirectly make the making of test specimen become is more simple simultaneously;

4. the water filling device set by the utility model, avoid during the rate that is radially expanded measures occur defeated and dispersed, the disintegration of the test specimen soil body, fall the phenomenons such as block, improve measuring accuracy.

5. the frame mounting be made up of base, upper cover, screw rod, bolt that the utility model is set up can fix vertical displacement in process of the test, prevents sample from producing vertical dilatational strain, eliminates the dependence to vertical dial gauge and its matched bracket.

Accompanying drawing explanation

Fig. 1 is front elevation of the present utility model;

Fig. 2 is perspective view of the present utility model.

Wherein 1. small-sized displacement meters (minimum calibration is 0.001mm clock gauge); 2. soil body annular test-piece; 3. large scale cutting ring; 4. bullion pad; 5. cushion block; 6. ring-type permeable stone; 7. circular glass; 8. the collar; 9. bottom permeable stone; 10. ring-type filter paper; 11. frame mountings; 12. water containers; 13 bases; 14 upper covers; 15 screw rods; 16 bolts.

Embodiment

Below in conjunction with accompanying drawing and example, the utility model is described further:

A kind of new soil is radially expanded rate tester, bottom mainly comprises square water container 12, bottom permeable stone 9, be placed in the filter paper 10 above bottom permeable stone 9, the cutting ring sample be made up of large scale cutting ring 3 and soil body annular test-piece 2 is positioned over above bottom permeable stone 9 and filter paper 10, the collar 8 is installed with fixing sample, annular test-piece 2 inside is placed with two bullion pads 4 along a certain radial direction, in case displacement meter 1 gauge head inserts impact test effect in soil sample, lay small-sized displacement meter 1, its gauge head is made just to be placed on two bullion pads 4, displacement meter 1 basis rest cushion block 5 is to fix its position, top mainly comprises ring-type filter paper 10, ring-type permeable stone 6, circular glass 7, and the frame mounting 11 to be made up of base 13, upper cover 14, screw rod 15, bolt 16, its effect fixes vertical displacement in process of the test, prevents sample from producing vertical dilatational strain.

A kind of new soil is radially expanded rate tester, and its method of operating comprises the following steps:

(1) sample preparation

1. cut undisturbed soil sample according to requirement of engineering or prepare the disturbed sample of desired moisture level density, when cutting undisturbed soil sample, sample pressurized situation at the trial should be made consistent with natural soil layer load-bearing direction;

2. soil sample is trimmed to the earth pillar slightly larger than large scale cutting ring (diameter 140mm, height 40mm) with fret-saw, wherein for the sampling of disturbed soil, can directly obtains in the sleeve of standard impact density instrument; Then with have gentle hands gently by large scale cutting ring vertical depression, limit flanging is repaiied, till soil sample filled by large scale cutting ring.Use scraper equating two ends again, when noting scraping flat sample, native face back and forth smeared by not handy scraper simultaneously.In working angles, answer meticulous inspection sample and record its level, color and have inclusion-free etc., obtaining large scale cutting ring sample;

3. be coated with skim vaseline at conventional cutting ring (diameter 61.8mm, height 20mm) inwall, utilize the conventional cutting ring of two longitudinal stack to repeat corresponding steps 2., excavate the large scale cutting ring soil sample centre equivalent soil body, obtain soil body ring-shaped sample.

(2) sample is installed

1. the base of frame mounting 11 is placed in water container 12, on base plate, places bottom permeable stone 9, filter paper 10, the collar 8 successively;

2. the cutting ring edge of a knife is downward, is placed among the collar 8 by annular test-piece 2, and is fixed on the inner ring wall of annular test-piece by two bullion pads 4 along axis;

3. place cushion block 5 and small-sized displacement meter 1 in annular test-piece inside successively, and displacement meter two ends gauge head is placed on metallic gasket 4, in case gauge head is absorbed in test inside soil body in process of the test, simultaneously by small-sized displacement meter 1 reading zero;

4. above test specimen, overlay ring-type filter paper 10 and annular permeable stone 6 successively, center is provided with circular glass 7, excessive to prevent center from seeping water, and convenient reading displacement meter numerical value;

5. the upper cover of frame mounting 11 is placed in above ring-type permeable stone, and is bolted, and give certain pressure to make each component contact tight;

(3) to water filling in water container, and dilatational strain data are recorded;

1. noting pure water enters in water container 12, and in container, the water surface must flood top permeable stone;

2. write down beginning water injection time, survey note dial gauge reading, till test specimen no longer expands at interval of 5min.

(3) result arranges

What calculate any instant is radially expanded rate:

δ e = πr 2 - πr ′ 2 πR 2 - πr 2 × 100 = ( r + r ′ ) ( r - r ′ ) πR 2 - πr 2 × 100 ( r + r ′ ) ΔH πR 2 - πr 2 × 100

By deriving above, obtain δ e:

δ e = ( 2 r - ΔH ) ΔH R 2 - r 2 × 100

ΔΗ=H t-H 0

In formula: δ e---the rate that is radially expanded (%) of soil during t, is calculated to 0.1

Δ H---t sample expansion increment

H 0---displacement meter reading during on-test

H t---test t displacement meter reading

R---test specimen outer shroud radius (this device regulation test specimen external diameter 140mm)

R---test specimen inner ring radius (this device regulation test specimen internal diameter 61.8mm)

R '---t test specimen inner ring radius

By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.

Claims (5)

1. new soil is radially expanded a rate tester, it is characterized in that: comprise water container, and water container is built-in with frame mounting; The base of described frame mounting being placed from lower to upper successively bottom permeable stone, lower annular filter paper, large scale cutting ring, top ring-type filter paper and ring-type permeable stone with soil body ring-shaped sample, is the circular glass of uniform thickness in the ring of described ring-type permeable stone; Described large scale cutting ring overcoat has the collar; The upper cover of described frame mounting covers on ring-type permeable stone, is connected between upper cover with base by vertical stationary installation, and it is tight that stationary installation gives each component contact that upper cover certain pressure makes frame mounting inside, to limit the vertical deformation of sample; The inside of described ring-shaped sample is placed with small-sized displacement meter, described displacement meter is placed in the vertical central axis place of ring-shaped sample, its two ends gauge head is along the inwall of the diametric(al) touching sample of ring-shaped sample, ring-shaped sample soak backward inner side produce lateral expansion, built-in displacement meter can read the dilatational strain of generation; The cushion block regulating height is placed with under described small-sized displacement meter; A hole corresponding to circular glass is stamped on described.
2. a kind of new soil according to claim 1 is radially expanded rate tester, it is characterized in that: the inwall of described ring-shaped sample respectively posts a bullion pad along arbitrary diametric two ends, and described gauge head just touches metallic gasket middle part.
3. a kind of new soil according to claim 1 is radially expanded rate tester, it is characterized in that: described circular glass and ring-type permeable stone consolidation are integrated.
4. a kind of new soil according to claim 1 is radially expanded rate tester, it is characterized in that: described circular glass is nested within ring-type permeable stone, and the two fits like a glove.
5. a kind of new soil according to claim 1 is radially expanded rate tester, it is characterized in that: the diameter of described large scale cutter ring is 140mm, is highly 40mm.
CN201520078783.5U 2015-02-04 2015-02-04 A kind of new soil is radially expanded rate tester CN204495823U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104634944A (en) * 2015-02-04 2015-05-20 山东大学 Novel soil radial expansion rate tester and using method thereof
CN106771068A (en) * 2016-12-17 2017-05-31 韩少鹏 A kind of soil property measurement apparatus and measuring method
CN106771061A (en) * 2016-12-03 2017-05-31 韩少鹏 Exploration engineering soil swelling measurement apparatus and measuring method
CN106813817A (en) * 2016-02-26 2017-06-09 中国辐射防护研究院 Two-way swelling stress measures test instrument
CN106908581A (en) * 2017-01-25 2017-06-30 浙江工业大学 A kind of simple portable Soil Water Content Rate Determination instrument of belt sensor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104634944A (en) * 2015-02-04 2015-05-20 山东大学 Novel soil radial expansion rate tester and using method thereof
CN104634944B (en) * 2015-02-04 2016-08-24 山东大学 A kind of new soil expanded radially rate tester and using method thereof
CN106813817B (en) * 2016-02-26 2020-04-03 中国辐射防护研究院 Bidirectional expansion stress measuring tester
CN106813817A (en) * 2016-02-26 2017-06-09 中国辐射防护研究院 Two-way swelling stress measures test instrument
CN106771061A (en) * 2016-12-03 2017-05-31 韩少鹏 Exploration engineering soil swelling measurement apparatus and measuring method
CN106771061B (en) * 2016-12-03 2019-03-29 清远市粤色地质工程公司 Exploration engineering soil swelling measuring device and measurement method
CN106771068A (en) * 2016-12-17 2017-05-31 韩少鹏 A kind of soil property measurement apparatus and measuring method
CN106908581A (en) * 2017-01-25 2017-06-30 浙江工业大学 A kind of simple portable Soil Water Content Rate Determination instrument of belt sensor
CN106908581B (en) * 2017-01-25 2019-06-14 浙江工业大学 A kind of simple portable Soil Water Content Rate Determination instrument of belt sensor

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C14 Grant of patent or utility model
GR01 Patent grant
C25 Abandonment of patent right or utility model to avoid double patenting
AV01 Patent right actively abandoned

Granted publication date: 20150722

Effective date of abandoning: 20160824