CN204924988U - Three large -scale bearing appearance devices of coarse -grained soil suitable for CT scan - Google Patents
Three large -scale bearing appearance devices of coarse -grained soil suitable for CT scan Download PDFInfo
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- CN204924988U CN204924988U CN201520710546.6U CN201520710546U CN204924988U CN 204924988 U CN204924988 U CN 204924988U CN 201520710546 U CN201520710546 U CN 201520710546U CN 204924988 U CN204924988 U CN 204924988U
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Abstract
The utility model provides a three large -scale bearing appearance devices of coarse -grained soil suitable for CT scan, including hold a kind base, down porous disk, go up porous disk, sample cap, by the semi -circular sheetmetal of two block splittings form to the die sinking. The lower part of holding kind base is equipped with matches the circular boss of pegging graft with large -scale triaxial apparatus base, and the upper portion of holding kind base is equipped with first circular recess, down is equipped with first water guide air conduction channel, the embedding of lower porous disk to the bottom of circular boss along the recess center first circular recess forms a circular plane and is used for sample bottom contact. Water inlet on the base of first water guide air conduction channel and large -scale triaxial apparatus is linked together, holds kind base side upper portion and establishes the first arc recess of round along a hoop and be used for the ligature rubber membrane, installs on holding kind base through mounting detachably the die sinking. The utility model discloses can dismantlement of triaxial apparatus base and installation be followed to the sample conveniently, the CT scan of triaxial test front and back sample can be realized to acquire the thin sight structural information of the experimental front and back soil body.
Description
Technical field
The utility model relates to soil mechanics shop experiment technical field of measurement and test, specifically a kind of large-scale three bearing sampling devices of coarse-grained soil being applicable to CT scan.
Background technology
Coarse-grained soil refers to the soil-stone material that the granule content (mass ratio) of particle diameter 0.075mm-60mm is greater than 50%.Coarse-grained soil is extensive in distributed in nature, rich reserves.Coarse-grained soil is the main dam material of earth and rockfill dam, is also one of main study subject of soil mechanics.Large-scale Triaxial Experiments is the Main Means of research coarse-grained soil Strength and Dformation characteristic, has become the important evidence of geotechnical engineering design by the parameter of the triaxial test mensuration soil body.Coarse-grained soil has the discrete features of discrete material, simple employing Study on Triaxial Tests coarse-grained soil mechanical behavior is a kind of method of phenomenology of macroscopic view, therefore studying these macroscopic law control mechanism behind and sample, carefully to see the change of characteristic accordingly particularly important, CT scan technology can can't harm because of it, dynamically, obtain the microscopical structure information of the soil body quantitatively, be widely applied in During Geotechnical Tests field in recent years, when utilizing CT technology to carry out Meso-structure observation to the coarse-grained soil before and after Large-scale Triaxial Experiments, require that sample can shift out from triaxial apparatus easily, the device quality carrying three axle samples is light, convenient carrying, metal can not be had in scanning area, can also be installed to after having scanned on triaxial apparatus and proceed the tests such as saturated consolidation shearing.
The large-scale three axle samples of coarse-grained soil adopt cylindrical specimens, when carrying out sample preparation, to be everlasting sample preparation on triaxial tester, in pressure chamber base, dress splits diaphragm and rubber membrane, with rubber belt, one end of rubber membrane and pressure chamber base are tightened, the porous disc connecting base is often mounted on base, porous disc encases by rubber membrane, after sample preparation, vacuumize to ensure that sample is upright, after sample preparation completes, pressure chamber base is connected with sample, when carrying out CT scan to sample, due to pressure chamber base quality weight, volume is large, and be metallic article, X ray cannot penetrate, can not scan together with base, this just needs sample to remove from base, ensure that sample is air tight simultaneously, and can be upright, after CT scan completes, sample can be arranged on the base of triaxial apparatus, and carry out series of experiments such as head saturated grade.Therefore, explore also a kind of large-scale three axle samples of coarse-grained soil being applicable to CT scan of utility model and hold sampling device and using method, realize the CT scan of sample before and after coarse-grained soil triaxial test, to obtain the microscopical structure information of the soil body before and after test, there is important practical usage.
Utility model content
The utility model is for the deficiency of existing sample making technology, provide a kind of large-scale three bearing sampling devices of coarse-grained soil being applicable to CT scan, this device adopts isolation technics, triaxial apparatus base is transformed, can easily sample be dismantled from triaxial apparatus base and install, and ensure air tight, structure be simple and light, the CT scan of sample before and after triaxial test can be realized, to obtain the microscopical structure information of the soil body before and after test.
Technical problem to be solved in the utility model is achieved by the following technical solution:
A kind of large-scale three bearing sampling devices of coarse-grained soil being applicable to CT scan, comprise and hold sample base, lower porous disc, upper porous disc, sample cap, the split cavity that the half-round metal sheet be separated by two pieces forms, the bottom of holding sample base is provided with the round boss mating grafting with large-scale triaxial apparatus base, the top of holding sample base is provided with the first circular groove, the first water guide air guide channel is provided with down to the bottom of round boss along groove center, lower porous disc embeds described first circular groove and forms a circular flat for contacting bottom sample, first water guide air guide channel is connected with the water inlet on the base of large-scale triaxial apparatus, holding sample chassis side top circumferentially establishes circle first arc groove for colligation rubber membrane, split cavity is removably mounted on by fixture and holds on sample base, the bottom of sample cap is provided with the second circular groove, upper porous disc embeds described second circular groove and forms a circular flat for sample top contact, sample cap side top circumferentially establishes a circle the 4th arc groove for colligation rubber membrane.
Be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as above, the junction of split cavity arranges fixed head from top to bottom respectively, both sides fixed head is arranged at least two bolts hole, two pieces of half-round metal sheets are connected through corresponding bolt hole on the fixed head of both sides by fixture.
Be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as above, split cavity vertically waits and arranges at least two fixing collars, to increase the intensity of split cavity.
Be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as above, in bottom split cavity, hoop establishes circle second arc groove for colligation rubber membrane.
Be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as above, in the bottom of split cavity, multiple bolt hole is circumferentially set, hold sample chassis side bottom circumferentially all correspondence be provided with the first bolt hole, fixture successively through the bolt hole of split cavity and the first bolt hole of holding sample base by split cavity with hold sample base and fix.
Be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as above, the center in sample crown portion arranges a 3rd downward arc groove, for matching with the load bar of triaxial tester.
Be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as above, hold sample base, upper porous disc, lower porous disc, sample cap and extraordinary aluminum alloy materials all can be adopted to make, light weight, can bear a constant load, and X ray can penetrate and can effectively reduce artifact.
The beneficial effects of the utility model are: when the utility model solves normal triaxial sample preparation, sample and large-scale triaxial cell base are fixed, due to pressure chamber base quality weight, volume is large, cannot carry out the problems such as CT scan, and the utility model can be dismantled sample easily and install from triaxial apparatus base, and ensure air tight, structure is simple and light, can realize the CT scan of sample before and after triaxial test, to obtain the microscopical structure information of the soil body before and after test.
Accompanying drawing explanation
Figure 1 shows that the utility model is applicable to the front view of the large-scale three bearing sampling devices of coarse-grained soil of CT scan;
Figure 2 shows that the utility model is applicable to hold in the large-scale three bearing sampling devices of coarse-grained soil of CT scan the vertical view of sample base;
Figure 3 shows that the utility model is applicable to the front view of split cavity in the large-scale three bearing sampling devices of coarse-grained soil of CT scan;
Figure 4 shows that the utility model is applicable to the vertical view of split cavity in the large-scale three bearing sampling devices of coarse-grained soil of CT scan;
Figure 5 shows that the utility model is applicable to the vertical view of sample cap in the large-scale three bearing sampling devices of coarse-grained soil of CT scan.
In figure: 1-large-scale triaxial apparatus base, 2-hold sample base, 3-lower porous disc, 4-split cavity, 5-upper porous disc, 6-sample cap, 7-lower seal, 8-the first water guide air guide channel, the 9-the first arc groove, the 10-the second arc groove, 11-fixed head, 12-the first set bolt, 13-fixing collar, the 14-the three arc groove, 15-the second water guide air guide channel, 16-upper O-ring seal, the 17-the four arc groove, the 18-the first bolt hole, 19-the second bolt hole, 20-the second set bolt, 21-sample, 22-rubber membrane.
Embodiment
Below in conjunction with the accompanying drawing in the utility model, the technical scheme in utility model is clearly and completely described.
Please refer to Fig. 1 and Fig. 2, the utility model provides a kind of large-scale three bearing sampling devices of coarse-grained soil being applicable to CT scan, comprises and holds sample base 2, lower porous disc 3, split cavity 4, upper porous disc 5, sample cap 6.
The bottom of holding sample base 2 is provided with the round boss mating grafting with large-scale triaxial apparatus base 1, the top of holding sample base 2 is provided with the first circular groove to lower recess, bottom along the first circular groove center down to round boss is provided with the first water guide air guide channel 8, and lower porous disc 3 embeds described first circular groove, and to form a diameter be that the circular flat of 300mm is for contacting bottom sample.Large-scale triaxial apparatus base 1 top is provided with the groove mated with round boss, and round boss inserts described groove and realizes coupling connection.First water guide air guide channel 8 can be connected with the water inlet on large-scale triaxial apparatus base 1, and available lower seal 7 seals.Holding sample base 2 side top circumferentially establishes circle first arc groove 9 for colligation rubber membrane 22, holds sample base 2 side bottom and is circumferentially evenly provided with six the first bolts hole 18, for fixing with split cavity 4.
Please further refer to Fig. 3 and Fig. 4, split cavity 4 is made up of two pieces of half-round metal sheets, in its junction, fixed head 11 is set respectively from top to bottom, both sides fixed head 11 is evenly arranged 4 the second bolts hole 19, two pieces of half-round metal sheets are connected through the second bolt hole 19 corresponding on both sides fixed head 11 by four fixtures (such as the first set bolt 12), split cavity 4 vertically spaced set three fixing collars 13 simultaneously, to increase the intensity of split cavity 4.In bottom split cavity 4, hoop establishes circle second arc groove 10 for colligation rubber membrane 22.6 bolts hole are circumferentially symmetrical arranged in the bottom of split cavity 4, and it is corresponding with the first bolt hole 18 holding sample base 2, with fixture (such as the second set bolt 20) by split cavity 4 with hold sample base 2 and fix, split cavity 4 can hold sample base 2 and large-scale triaxial apparatus base 1 matches with above-mentioned.Be understandable that, the bottom of split cavity 4 is enclosed within the round platform of large-scale triaxial apparatus base 1 top, large-scale triaxial apparatus base 1 top round platform is installed and holds sample base 2, holds sample base 2, the external diameter of large-scale triaxial apparatus base 1 top round platform and the internal diameter adaptation of split cavity 4.
Figure 5 shows that the vertical view of sample cap in the utility model, the bottom of sample cap 6 is provided with the second circular groove (as shown in Figure 1) that diameter is 260mm, up arrange " Z " font second water guide air guide channel 15 to the top of sample cap 6 along groove center, end can seal with O-ring seal 16.Upper porous disc 5 embeds described second circular groove, and to form a diameter be that the circular flat of 300mm is for sample top contact, the center at sample cap 6 top arranges a 3rd downward arc groove 14, for matching with the load bar of triaxial tester, sample cap 6 side top circumferentially establishes a circle the 4th arc groove 17 for colligation rubber membrane 22.
Holding sample base 2, upper porous disc 3, lower porous disc 5, sample cap 6 in the utility model all can adopt extraordinary aluminum alloy materials to make, and has light weight, can bear a constant load, X ray can penetrate and can effectively reduce the feature of artifact.
The using method that the utility model is applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan is specially:
Step one, sample preparation: embed on large-scale triaxial apparatus base 1 and hold sample base 2, hold on sample base 2 embed under porous disc 3, with rubber belt, rubber membrane 22 is being held the first arc groove 9 place on sample base 2 and holding sample base 2 and tighten again, then on triaxial apparatus base 1, split cavity 4 is loaded onto, the two panels interface of split cavity 4 is fixed with the first set bolt 12, rubber membrane 22 is turned up on split cavity 4, and make it straight and be close to split cavity 4 inwall, earth material is prepared according to the regulation of SL237-053-1999 code, earth material is vibrated shaping according to the wet method of smashing of multilayer, until install last one deck, flattened faces, add porous disc 5 and sample cap 6, the 4th arc groove 17 place on sample cap 6 tightens rubber membrane 22,
Wherein split cavity 4 with hold sample base 2 fix time, the bolt hole of split cavity 4 is corresponding with the first bolt hole 18 holding sample base 2, and fixing with the second set bolt 20.
Step 2, sample are separated with triaxial cell's base 1: drive vacuum pump and bleed from sample top, make sample upright, and fast the second water guide air guide channel 15 end O-ring seal 16 on sample cap is sealed, then take split cavity 4 apart and hold the second set bolt 20 between sample base 2, sample 21 is separated with triaxial cell's base 1, separation of copulating moth die sinking 4;
Step 3, CT scan: the first water guide air guide channel 8 end lower seal 7 of holding on sample base 2 sealed, be together carried on CT machine carry out CT scan together with holding sample base 2, upper porous disc 3, lower porous disc 5 and sample cap 6;
Step 4, the tests such as triaxial compressions: after CT scan completes, Sample transportation is installed on triaxial apparatus base 1, tear O-ring seal 7 open, lower seal 16, with rubber belt, the bottom end of rubber membrane 22 is tightened at the second arc groove 10 place of split cavity 4 and pressure chamber base 1, continue to vacuumize, drive water valve into, sample is under suction function, water is by the inlet opening in pressure chamber base 1, first water guide air guide channel 8, sample 21, second water guide air guide channel 15, from bottom to top saturated sample gradually, after sample is saturated, the tests such as triaxial compressions are carried out according to the regulation of SL237-060-1999 code.
Carrying out after triaxial compressions etc. tested, still to carry out CT scan to sample according to the method described above.
The beneficial effects of the utility model are, when the utility model solves normal triaxial sample preparation, sample and large-scale triaxial cell base are fixed, and due to pressure chamber base quality weight, volume is large, the problems such as CT scan cannot be carried out, the utility model can be dismantled sample easily and install from triaxial apparatus base, and ensures air tight, and structure is simple and light, the CT scan of sample before and after triaxial test can be realized, to obtain the microscopical structure information of the soil body before and after test.
The above; be only embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly belong to those skilled in the art in the technical scope that the utility model discloses; the change that can expect easily or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claim.
Claims (7)
1. one kind is applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan, comprise and hold sample base (2), lower porous disc (3), upper porous disc (5), sample cap (6), it is characterized in that: also comprise the split cavity (4) be made up of two pieces of half-round metal sheets be separated, the bottom of holding sample base (2) is provided with the round boss mating grafting with large-scale triaxial apparatus base (1), the top of holding sample base is provided with the first circular groove, the first water guide air guide channel (8) is provided with down to the bottom of round boss along groove center, lower porous disc (3) embeds described first circular groove and forms a circular flat for contacting bottom sample, first water guide air guide channel (8) is connected with the water inlet on the base (1) of large-scale triaxial apparatus, holding sample base (2) side top circumferentially establishes circle first arc groove (9) for colligation rubber membrane (22), split cavity (4) is removably mounted on by fixture and holds on sample base (2), the bottom of sample cap (6) is provided with the second circular groove, upper porous disc (5) embeds described second circular groove and forms a circular flat for sample top contact, sample cap (6) side top circumferentially establishes a circle the 4th arc groove (17) for colligation rubber membrane (22).
2. be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as claimed in claim 1, it is characterized in that: the junction of split cavity (4) arranges fixed head (11) from top to bottom respectively, both sides fixed head (11) is upper arranges at least two bolts hole, and two pieces of half-round metal sheets are connected through the upper corresponding bolt hole of both sides fixed head (11) by fixture.
3. be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as claimed in claim 1, it is characterized in that: split cavity (4) vertically waits and arranges at least two fixing collars (13), to increase the intensity of split cavity (4).
4. be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as claimed in claim 1, it is characterized in that: in split cavity (4) bottom, hoop establishes circle second arc groove (10) for colligation rubber membrane (22).
5. be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as claimed in claim 1, it is characterized in that: in the bottom of split cavity (4), multiple bolt hole is circumferentially set, hold sample base (2) side bottom circumferentially all correspondence be provided with the first bolt hole (18), fixture successively through the bolt hole of split cavity (4) and the first bolt hole (18) of holding sample base (2) by split cavity (4) with to hold sample base (2) fixing.
6. be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as claimed in claim 1, it is characterized in that: the center at sample cap (6) top arranges a 3rd downward arc groove (14), for matching with the load bar of triaxial tester.
7. be applicable to the large-scale three bearing sampling devices of coarse-grained soil of CT scan as claimed in claim 1, it is characterized in that: hold sample base (2), upper porous disc (3), lower porous disc (5), sample cap (6) all can adopt extraordinary aluminum alloy materials to make, light weight, can bear a constant load, X ray can penetrate and can effectively reduce artifact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520710546.6U CN204924988U (en) | 2015-09-14 | 2015-09-14 | Three large -scale bearing appearance devices of coarse -grained soil suitable for CT scan |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520710546.6U CN204924988U (en) | 2015-09-14 | 2015-09-14 | Three large -scale bearing appearance devices of coarse -grained soil suitable for CT scan |
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| CN204924988U true CN204924988U (en) | 2015-12-30 |
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| CN201520710546.6U Withdrawn - After Issue CN204924988U (en) | 2015-09-14 | 2015-09-14 | Three large -scale bearing appearance devices of coarse -grained soil suitable for CT scan |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181720A (en) * | 2015-09-14 | 2015-12-23 | 长江水利委员会长江科学院 | Coarse-grained soil large-size three-bearing sample device fit for CT scanning and use method of device |
| CN105973702A (en) * | 2016-04-29 | 2016-09-28 | 南京大学（苏州）高新技术研究院 | Soil synchrotron radiation X light rotating triaxial real time observation method and system thereof |
-
2015
- 2015-09-14 CN CN201520710546.6U patent/CN204924988U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181720A (en) * | 2015-09-14 | 2015-12-23 | 长江水利委员会长江科学院 | Coarse-grained soil large-size three-bearing sample device fit for CT scanning and use method of device |
| CN105181720B (en) * | 2015-09-14 | 2017-08-08 | 长江水利委员会长江科学院 | Suitable for the bearing sampling device of coarse grain soil large-scale three and its application method of CT scan |
| CN105973702A (en) * | 2016-04-29 | 2016-09-28 | 南京大学（苏州）高新技术研究院 | Soil synchrotron radiation X light rotating triaxial real time observation method and system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151230 Effective date of abandoning: 20170808 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20151230 Effective date of abandoning: 20170808 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |