CN205049417U - Graded broken stone true triaxil tester that mixes border loading mode - Google Patents
Graded broken stone true triaxil tester that mixes border loading mode Download PDFInfo
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- CN205049417U CN205049417U CN201520828464.1U CN201520828464U CN205049417U CN 205049417 U CN205049417 U CN 205049417U CN 201520828464 U CN201520828464 U CN 201520828464U CN 205049417 U CN205049417 U CN 205049417U
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Abstract
The utility model discloses a graded broken stone true triaxil tester that mixes border loading mode, this graded broken stone true triaxil tester include pressure chamber subassembly and loading system, when experimental, arrange the pressure chamber base in shaking table on, on the pressure chamber base, form a cube of cavity through four rigidity load plate and four mutual overlap joints of combined type load plate, through vibration manipulation shaping sample in cube cavity, after the sample shaping, place top rigidity load plate, top rigidity loading end and pressure chamber apron, wholly form the pressure chamber subassembly, displace the pressure chamber subassembly between loading system bottom plate and loading system roof, after the pressure chamber subassembly is taken one's place, adjust five sets of servo loading system, make it contact with the rigidity loading end that corresponds respectively, according to predetermined testing program, control five sets of servo loading system, accomplish the sample loading procedure. The utility model discloses the simple structure, to be suitable for the test piece size big, can accomplish the three -dimensional load and apply, and the load intensity is high.
Description
Technical field:
The utility model belongs to road engineering technical field, is specifically related to a kind of graded broken stone true triaxil tester of compound boundary load mode.
Background technology:
In road engineering, graded broken stone is in complicated 3-D stree field, is generally in compression-shear stress state.Under the effect of compression-shear stress, the yield stress of graded broken stone structural damage dispersed material structure often reaches the upper limit, causes material generation plastic flow deformation to cause.Normal triaxial pressure test have studied the impact of confined pressure on graded broken stone deformation and failure, and does not consider the impact of intermediate principal stress on graded broken stone elastoplastic property.Under anisobaric triaxial stress state, intermediate principal stress is on the impact of graded broken stone deformation-strength characteristic, be in recent years since one of the advanced subject explored of field of road.
Utility model content:
The purpose of this utility model, for the deficiencies in the prior art, provides a kind of graded broken stone true triaxil tester of compound boundary load mode.
For achieving the above object, the utility model adopts following technical scheme to be achieved:
A graded broken stone true triaxil tester for compound boundary load mode, comprises pressure chamber's assembly and loading system; Wherein,
Pressure chamber's assembly comprises pressure chamber base, be arranged on four rigidity load plate of pressure chamber base top surrounding, and four the rigidity loading ends be separately positioned on outside four rigidity load plate, pressure chamber base and four rigidity load plate form a cube of cavity, cuboid sample is positioned at this cube of cavity, the top of four rigidity load plate and cuboid sample is provided with top rigid load plate and pressure chamber's cover plate from bottom to top, the center of this pressure chamber's cover plate offers slotted eye, and the top rigid load plate arranged outside in slotted eye has top rigid loading end;
Loading system comprises the loading system base plate and loading system top board that be arranged in parallel, is arranged on four servo loading systems between loading system base plate and loading system top board, and is arranged on the axial servo loading system at loading system top board top; During test, pressure chamber's assembly is arranged between loading system base plate and loading system top board, and four servo loading systems and axial servo loading system are respectively used to four rigidity loading ends and top rigid loading end force.
The utility model further improves and is, the slotted eye that pressure chamber offers cover plate center is square slotted eye.
The utility model further improves and is, is also provided with a combined type load plate between each rigidity load plate and cuboid sample circumference.
The utility model further improves and is, each combined type load plate comprises elasticity grid and the Stiff Block for filling this elasticity grid gap.
The utility model further improves and is, loading system also comprises the steel plate washer be arranged between pressure chamber base and loading system base plate.
The utility model further improves and is, loading system also comprises the lift rail plate be arranged between pressure chamber base and loading system base plate.
The utility model further improves and is, the controller that each servo loading system and axial servo loading system include hydraulic jack and stretch for hydraulic control oil cylinder.
The utility model further improves and is, all start there is square groove bottom pressure chamber base top and pressure chamber's cover plate, top rigid load plate is arranged in the square groove of pressure chamber's cover plate, and the two ends of four rigidity load plate are separately positioned in the square groove surrounding of pressure chamber base and the square groove surrounding of pressure chamber's cover plate.
Compared with prior art, the utility model has following Advantageous Effects:
The graded broken stone true triaxil tester of the compound boundary load mode that the utility model provides, has simple structure, uses sample dimensions large, can complete three-dimensional load and apply, the advantage that load application intensity is high.
Wherein, the utility model uses five to overlap Hydrauservo Systems and applies the loading of hybrid border, and graded broken stone sample can realize the loading of three-dimensional equipressure and three-dimensional anisobaric loads, and can realize the loading of different load mode.When xial feed is maximum, graded broken stone sample is in vertical direction generation compression deformation, and the hybrid load plate of sample horizontal direction is also along with compression deformation; When horizontal direction load is maximum, due to rigidity load plate and base all through special processing in like manner, can be free to slide, can there is compression deformation in sample in the horizontal direction, and two other direction expands thereupon.Be reserved with certain spacing between each rigidity load plate, also effectively can avoid the mutual interference between rigidity load plate.
Accompanying drawing illustrates:
Fig. 1 is the cross-sectional structure schematic diagram of graded broken stone true triaxil tester pressure chamber assembly.
Fig. 2 is the vertical section structure schematic diagram of graded broken stone true triaxil tester pressure chamber assembly.
Fig. 3 is the schematic perspective view of graded broken stone true triaxil tester pressure chamber assembly.
Fig. 4 is the schematic perspective view of graded broken stone true triaxil tester.
Fig. 5 is the structural representation of combined type load plate.
In figure: 1 is the first rigidity loading end, 4 is the second rigidity loading end, and 7 is the 3rd rigidity loading end, and 10 is the 4th rigidity loading end, 2 is the first rigidity load plate, 5 is the second rigidity load plate, and 8 is the 3rd rigidity load plate, and 11 is the 4th rigidity load plate, 3 is the first combined type load plate, 6 is the second combined type load plate, and 9 is the 3rd combined type load plate, and 12 is the 4th combined type load plate; 13 is pressure chamber base, and 14 is cuboid sample; 15 is elasticity grid, and 16 is Stiff Block, and 17 is pressure chamber's cover plate, and 18 is top rigid load plate, and 19 is top rigid loading end;
20 is axial servo loading system, and 21 is the first servo loading system, and 22 is the second servo loading system, and 23 is the 3rd servo loading system, and 24 is the 4th servo loading system; 25 is pressure chamber's assembly, and 26 is lift rail plate, and 27 is steel plate washer, and 28 is loading system top board, and 29 is loading system base plate.
Embodiment:
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figures 1 to 4, the graded broken stone true triaxil tester of a kind of compound boundary load mode of the utility model, comprises pressure chamber's assembly 25 and loading system, wherein, pressure chamber's assembly 25 comprises pressure chamber base 13, be arranged on four rigidity load plate of pressure chamber base 13 top surrounding, and four the rigidity loading ends be separately positioned on outside four rigidity load plate, pressure chamber base 13 and four rigidity load plate form a cube of cavity, cuboid sample 14 is positioned at this cube of cavity, the top of four rigidity load plate and cuboid sample 14 is provided with top rigid load plate 18 and pressure chamber's cover plate 17 from bottom to top, the center of this pressure chamber's cover plate 17 offers square slotted eye, top rigid load plate 18 arranged outside in square slotted eye has top rigid loading end 19.In addition, pressure chamber base 13 is rigid support plate, and surface, through process, makes friction factor between four combined type load plate very little.
Loading system comprises the loading system base plate 29 and loading system top board 28 that be arranged in parallel, be arranged on four servo loading systems between loading system base plate 29 and loading system top board 28, and be arranged on the axial servo loading system 20 at loading system top board 28 top; During test, pressure chamber's assembly 25 is arranged between loading system base plate 29 and loading system top board 28, and four servo loading systems and axial servo loading system 20 are respectively used to exert a force to four rigidity loading ends and top rigid loading end 19.Specifically, by four rigidity loading ends, load application is carried out to four rigidity load plate, and then four side load applications to cuboid sample 14, reach top rigid load plate 18 by top rigid loading end 19 load application, remake the end face being used in cuboid sample 14.Pressure chamber base 13 and pressure chamber's cover plate 17 realize the constrained of pressure cell jointly, form the cuboid sample 14 that six bread enclose.
Further, a combined type load plate is also provided with between each rigidity load plate and cuboid sample 14 circumference.Specifically, four rigidity load plate are respectively first to fourth rigidity load plate 2,5,8 and 10, four rigidity loading ends corresponding outside four rigidity load plate are respectively the combined type load plate arranged between first to fourth rigidity loading end 1,4,7 and 10, first to fourth rigidity load plate 2,5,8 and 10 and cuboid sample 14 circumference and are respectively first to fourth combined type load plate 3,6,9 and 12.Four servo loading systems of first to fourth rigidity loading end 1,4,7 and 10 correspondence are respectively first to fourth servo loading system 21,22,23 and 24.And have, the controller that each servo loading system and axial servo loading system 20 include hydraulic jack and stretch for hydraulic control oil cylinder.Wherein, the first servo loading system 21 and the 3rd servo loading system 23 are subtend loading system, and the level that applies is to load; Second servo loading system 22 and the 4th servo loading system 24 are subtend loading system, and the level that applies is to load; Axial servo loading system 20 applies xial feed.
Specifically, offer square slotted eye in the center of pressure chamber's cover plate 17, axial servo loading system 20 stretches out with the square slotted eye from pressure chamber's cover plate 17 and is connected with top rigid loading end 19, applies xial feed.First servo loading system 21 is directly connected with the first rigidity loading end 1, second servo loading system 22 is directly connected with the second rigidity loading end 4,3rd servo loading system 23 is directly connected with the 3rd rigidity loading end 7,4th servo loading system 24 is directly connected with the 4th rigidity loading end 10, the level that applies respectively to load, and controls the while that each servo loading system carrying out and asymmetrical load by microsystem.
As shown in Figure 5, each combined type load plate comprises elasticity grid 15 and the Stiff Block 16 for filling this elasticity grid 15 gap.Combined type load plate is connected to form by Stiff Block 16 and elasticity grid 15 embedded squeezing, and Stiff Block 16 and elasticity grid 15 are uniformly distributed according to a certain percentage, and by Stiff Block 16 pairs of test specimen load applications, elasticity grid 15 realizes the loading surface deformation of test specimen in loading procedure.
As shown in Figure 4, loading system also comprises and is arranged on steel plate washer 27 between pressure chamber base 13 and loading system base plate 29 and lift rail plate 26, lift rail plate 26 can facilitate the load and unload of pressure chamber, is adjusted the height of pressure chamber's assembly 25 below pressure chamber's assembly 25 by steel plate washer 27.
Further, all start there is square groove bottom pressure chamber base 13 top and pressure chamber's cover plate 17, top rigid load plate 18 is arranged in the square groove of pressure chamber's cover plate 17, and the two ends of four rigidity load plate are separately positioned in the square groove surrounding of pressure chamber base 13 and the square groove surrounding of pressure chamber's cover plate 17.
Principle of work of the present utility model is:
Servo loading system is controlled by microcomputer, xial feed is applied by end face rigidity load plate 19 by axial servo loading system 20, load applies xial feed equably by end face rigid load plate 18 pairs of graded broken stone cuboid samples 14, adjust loading surface by first to fourth combined type load plate 3,6,9 and 12 in the horizontal direction simultaneously, cuboid sample 14 can be ensured not by the impact of loading surface change.
First servo loading system 21 and the second servo loading system 22 form horizontal subtend loading system, 3rd servo loading system 23 and the 4th servo loading system 24 form horizontal subtend loading system, guarantee that cuboid sample 14 is in symmetric State all the time by subtend asymmetrical load.In like manner, when level is to applying maximum axial load, another horizontal direction and axial loading surface also can change thereupon, ensure cuboid sample 14 and loading surface deform in same pace.
In order to further understand the utility model, now following explanation is done to its test method:
1) pressure chamber base 13 is placed on shaking table;
2) in pressure chamber base 13, a cube of cavity is formed by first to fourth combined type load plate 3,6,9 and 12 and first to fourth rigidity load plate 2,5,8 and 10, first to fourth combined type load plate 3,6,9 and 12 is at internal layer, first to fourth rigidity load plate 2,5,8 and 10 is at skin, interior layer composite load plate mutually overlaps and forms, and outer field rigidity load plate pushes down the half of each combined type load plate thickness;
3) shaping cuboid sample 14 in cube cavity formed;
4) complete cuboid sample 14 by vibratory drilling method, after sample is shaping, top rigid load plate 18 and top rigid loading end 19 is placed, and pressure chamber's cover plate 17 is placed, adjust position, overall mineralization pressure chamber component 25;
5) by pressure chamber's assembly 25 dislocation on lift rail plate 26, by lift rail plate 26, pressure chamber's assembly 25 is pushed into predetermined loading position, and the height of lifting pressure chamber component 25, increase steel plate washer 27 in the below of pressure chamber and make pressure chamber in place;
6) pressure chamber's assembly 25 in place after, adjust first to fourth servo loading system 21,22,23 and 24, make it contact with first to fourth corresponding rigidity loading end 1,4,7 and 10, adjust axial servo loading system 20, make it contact with top rigid loading end 19;
7) according to predetermined testing program, realize loading cuboid sample 14 by four servo loading systems and axial servo loading system 20, namely complete the loading procedure to cuboid sample 14.
Claims (8)
1. a graded broken stone true triaxil tester for compound boundary load mode, is characterized in that, comprises pressure chamber's assembly (25) and loading system; Wherein,
Pressure chamber's assembly (25) comprises pressure chamber base (13), be arranged on four rigidity load plate of pressure chamber base (13) top surrounding, and four the rigidity loading ends be separately positioned on outside four rigidity load plate, pressure chamber base (13) and four rigidity load plate form a cube of cavity, cuboid sample (14) is positioned at this cube of cavity, the top of four rigidity load plate and cuboid sample (14) is provided with top rigid load plate (18) and pressure chamber's cover plate (17) from bottom to top, the center of this pressure chamber's cover plate (17) offers slotted eye, top rigid load plate (18) arranged outside in slotted eye has top rigid loading end (19),
Loading system comprises the loading system base plate (29) and loading system top board (28) that be arranged in parallel, be arranged on four servo loading systems between loading system base plate (29) and loading system top board (28), and be arranged on the axial servo loading system (20) at loading system top board (28) top; During test, pressure chamber's assembly (25) is arranged between loading system base plate (29) and loading system top board (28), and four servo loading systems and axial servo loading system (20) are respectively used to four rigidity loading ends and top rigid loading end (19) force.
2. the graded broken stone true triaxil tester of a kind of compound boundary load mode according to claim 1, is characterized in that, the slotted eye that pressure chamber's cover plate (17) center is offered is square slotted eye.
3. the graded broken stone true triaxil tester of a kind of compound boundary load mode according to claim 1, is characterized in that, is also provided with a combined type load plate between each rigidity load plate and cuboid sample (14) circumference.
4. the graded broken stone true triaxil tester of a kind of compound boundary load mode according to claim 3, it is characterized in that, each combined type load plate comprises elasticity grid (15) and the Stiff Block (16) for filling this elasticity grid (15) gap.
5. the graded broken stone true triaxil tester of a kind of compound boundary load mode according to claim 1, it is characterized in that, loading system also comprises the steel plate washer (27) be arranged between pressure chamber base (13) and loading system base plate (29).
6. the graded broken stone true triaxil tester of a kind of compound boundary load mode according to claim 5, it is characterized in that, loading system also comprises the lift rail plate (26) be arranged between pressure chamber base (13) and loading system base plate (29).
7. the graded broken stone true triaxil tester of a kind of compound boundary load mode according to claim 1, it is characterized in that, the controller that each servo loading system and axial servo loading system (20) include hydraulic jack and stretch for hydraulic control oil cylinder.
8. the graded broken stone true triaxil tester of a kind of compound boundary load mode according to claim 1, it is characterized in that, pressure chamber base (13) top and pressure chamber's cover plate (17) bottom all start there is square groove, top rigid load plate (18) is arranged in the square groove of pressure chamber's cover plate (17), and the two ends of four rigidity load plate are separately positioned in the square groove surrounding of pressure chamber base (13) and the square groove surrounding of pressure chamber's cover plate (17).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520828464.1U CN205049417U (en) | 2015-10-22 | 2015-10-22 | Graded broken stone true triaxil tester that mixes border loading mode |
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| CN201520828464.1U CN205049417U (en) | 2015-10-22 | 2015-10-22 | Graded broken stone true triaxil tester that mixes border loading mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132719A (en) * | 2019-06-05 | 2019-08-16 | 青岛理工大学 | The geotechnological deformable large scale soil box structure of true triaxial test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110132719A (en) * | 2019-06-05 | 2019-08-16 | 青岛理工大学 | The geotechnological deformable large scale soil box structure of true triaxial test |
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