CN203572696U - Stress control type geotechnical sample compactor - Google Patents
Stress control type geotechnical sample compactor Download PDFInfo
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- CN203572696U CN203572696U CN201320370779.7U CN201320370779U CN203572696U CN 203572696 U CN203572696 U CN 203572696U CN 201320370779 U CN201320370779 U CN 201320370779U CN 203572696 U CN203572696 U CN 203572696U
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- pressure
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- compaction
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Abstract
The utility model discloses a stress control type geotechnical sample compactor which comprises a sample compaction top plate and a sample compaction base plate which are opposite to each other, are horizontally arranged and are connected together through a connection rod, and a jack, a sample compaction head and a sample compaction die which are connected with one another in sequence from bottom to top in the vertical direction, wherein the top end of a top sample compaction head is fixed on the bottom surface of the sample compaction top plate; a jack fixing slot is formed in a position, which corresponds to the top sample compaction head, on the sample compaction base plate; during sample compaction, the bottom end of the jack is arranged in the jack fixing slot, and the sample compaction head and the top sample compaction head are matched with the inner cavity of the sample compaction die in a sliding manner. The stress control type geotechnical sample compactor also comprises a stress sensor and a displacement sensor; the sensing part of the stress sensor is mounted at the bottom end of the top sample compaction head; a force transmission rod of the displacement sensor is connected with a pressure head of the jack. The stress control type geotechnical sample compactor disclosed by the utility model can make uniform soil samples in a compaction manner; furthermore, in a sample compaction process, a stress change and a displacement change can be seen, so that the sample compaction rate can be adjusted in time; in a demolding process, damage to a test sample can be reduced by controlling the speed of the jack.
Description
Technical field
The present invention relates to geotechnological equipment technical field, especially a kind of Stress Control formula geotechnique sample-pressing device.Background technology
Current geotechnological sample making technology mainly contains for the method for making sample of remoulded sample sample method and the pressure-like method of hitting.Wherein hit sample method and be directly according to predefined bulk density and water content, a certain amount of wet soil is installed to and hits sample device the inside, then in the middle of hitting sample device, hit sample, till hitting the dry density of needs; Pressure-like method is to utilize special geotechnological sample-pressing device, and a certain amount of wet soil is installed to sample-pressing device the inside, then utilizes dead load pressure-like, till being pressed onto predefined dry density.The conventional sample device that hits often needs layering in the process of hitting sample, if the soil sample hitting not stratified is very inhomogeneous, dry density is widely different up and down, if layering, in the process of layering, can produce interface between layers, although carried out plane hair in the process of sample preparation, interface between layers thoroughly cannot have been eliminated all the time.The speed of conventional manual pressure-like method uncontrollable pressure-like in the process of pressure-like, while causing pressure-like too fast, soil sample springback capacity is larger, crosses when slow the limitation of bad control again.But the quality of sample preparation is directly determining the reliability of the test figure of geotechnological triaxial compression test.But also have some units to use special sampling machine to carry out sample preparation, in this process, need special testing crew operation, and the cost of the instrument of sample preparation is also very high.
Utility model content
The present invention is directed to the deficiencies in the prior art, propose Stress Control formula geotechnique sample-pressing device, can extrude uniform soil sample, and in the process of pressure-like, can realize visual that Stress and displacement changes, and then can adjust in time the speed of pressure-like.In the process of the demoulding, also can reduce by controlling the speed of lifting jack the damage of sample.
In order to realize above-mentioned utility model object, the invention provides following technical scheme: Stress Control formula geotechnique sample-pressing device, comprises that relative level places and link together by connecting link
Pressure-like top board and pressure-like base plate, and in the vertical direction first latter linked lifting jack, pressure-like head and pressure-like mould from bottom to top,
The top of top pressure-like head is fixed on the bottom surface of described pressure-like top board, and position corresponding with described top pressure-like head on described pressure-like base plate is provided with lifting jack pickup groove,
During pressure-like, described lifting jack bottom is placed in described lifting jack pickup groove, and described pressure-like head and described top pressure-like head and described pressure-like dies cavity are slidably matched,
Also comprise strain gauge and displacement transducer, the induction position of described strain gauge is arranged on the bottom of described top pressure-like head, and the transmission rod of described displacement transducer is connected with the pressure head of described lifting jack.
Further, be also provided with the second lifting jack pickup groove on described pressure-like base plate, position corresponding with described the second lifting jack pickup groove on described pressure-like top board has demoulding mouth, and described demoulding mouth is that through hole and diameter are identical with the internal diameter of described pressure-like mould.
Further, at the top of described pressure-like top board, sensor display screen is installed, in order to show the data of sensor transmissions.
Further, described connecting link has four in the position at four angles, described pressure-like top board and described pressure-like base plate to be linked together respectively.
Further, described pressure-like mould is cylindrical shape, and its internal diameter is corresponding with the cross-sectional diameter of described pressure-like head and top pressure-like head.
Stress Control formula geotechnique sample-pressing device of the present invention, can extrude uniform soil sample, and in the process of pressure-like, can realize visual that Stress and displacement changes, and then can adjust in time the speed of pressure-like.In the process of the demoulding, also can reduce by controlling the speed of lifting jack the damage of sample.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of Stress Control formula geotechnique sample-pressing device of the present invention; Fig. 2 is the schematic top plan view of pressure-like top board of the present invention;
Fig. 3 is the schematic top plan view of pressure-like base plate of the present invention.
Embodiment
Below in conjunction with accompanying drawing, describe the present invention, the description of this part is only exemplary and explanatory, should not have any restriction to protection scope of the present invention.
Stress Control formula as Figure 1-3 geotechnique sample-pressing device, comprises pressure-like top board 1 and pressure-like base plate 2 that relative level is placed and linked together by connecting link 3, and in the vertical direction first latter linked lifting jack 4, pressure-like 6 and pressure-like mould 5 from bottom to top,
The top of top pressure-like 7 is fixed on the bottom surface of pressure-like top board 1, and position corresponding with top pressure-like 7 on pressure-like base plate 2 is provided with lifting jack pickup groove 21,
During pressure-like, lifting jack 4 bottoms are placed in lifting jack pickup groove 21, and pressure-like 6 and top pressure-like 7 is slidably matched with pressure-like mould 5 inner chambers,
Also comprise strain gauge 9 and displacement transducer 8, the induction position 91 of strain gauge 9 is arranged on the bottom of top pressure-like 7, displacement transducer 8 is bolted on the bottom surface of pressure-like top board 1, and the transmission rod 81 of displacement transducer 8 is connected with the pressure head 41 of lifting jack 4.
On pressure-like base plate 2, be also provided with the second lifting jack pickup groove 22, position corresponding with the second lifting jack pickup groove 22 on pressure-like top board 1 has demoulding mouth 11, and demoulding mouth 11 is that through hole and diameter are identical with the internal diameter of pressure-like mould 5.
At the top of pressure-like top board 1, sensor display screen 10 is installed, in order to show the data of sensor transmissions.
Connecting link 3 has four in the position at four angles, pressure-like top board 1 and pressure-like base plate 2 to be linked together respectively.
Pressure-like mould 5 is cylindrical shape, and the cross-sectional diameter of its internal diameter and pressure-like 6 and top pressure-like 7 is corresponding.
The concrete specification of each parts can be set as: the plate face of pressure-like top board 1 and pressure-like base plate 2 is of a size of 60
× 80cm, the distance between pressure-like top board 1 and pressure-like base plate 2 is 70cm; The internal diameter of pressure-like mould 5 can be 38mm, 50mm or 100mm, and corresponding height is 150mm, 200mm or 400mm; The diameter of the pressure-like corresponding with pressure-like mould 56 and top pressure-like 7 is 37.9mm, 49.9mm or 99.9mm, pressure-like 6
Length be 160mm, 210mm or 410mm, the length of top pressure-like 7 is 30mm; The diameter of demoulding mouth 11 is 100mm; 2.5 tons of above pressure are wanted to bear in the position that each connecting link 3 is connected with pressure-like top board 1 and pressure-like base plate 2.
During use, pressure-like mould 5 is arranged in pressure-like 6, a certain amount of soil sample is poured in pressure-like mould 5, start lifting jack 4, top pressure-like 7 is entered in pressure-like mould 5, start pressure-like.In pressure-like process, observe displacement transducer 8 and strain gauge 9 changes, the increment control algorithm of stress, in a suitable speed, by the height of displacement transducer 8 reading Control Assays, is write down to the stress value of pressure-like for the first time.By mould conversely, then press soil sample, the stress value while being pressed onto for the first time one time.After pressure-like finishes, related lifting jack 4 pressure-like mould 5 is taken out, put into the second lifting jack pickup groove 22, pressure-like mould 5 tops withstand on the outer of demoulding mouth 11, start lifting jack 4, pressure-like is released from pressure-like mould 5 and then from demoulding mouth 11, take out pressure-like and complete sample preparation.
Stress Control formula geotechnique sample-pressing device of the present invention, can extrude uniform soil sample, and in the process of pressure-like, can realize visual that Stress and displacement changes, and then can adjust in time the speed of pressure-like.In the process of the demoulding, also can reduce by controlling the speed of lifting jack the damage of sample.
Claims (5)
1. Stress Control formula geotechnique sample-pressing device, is characterized in that, comprises pressure-like top board and pressure-like base plate that relative level is placed and linked together by connecting link, and in the vertical direction first latter linked lifting jack, pressure-like head and pressure-like mould from bottom to top,
The top of top pressure-like head is fixed on the bottom surface of described pressure-like top board, and position corresponding with described top pressure-like head on described pressure-like base plate is provided with lifting jack pickup groove,
During pressure-like, described lifting jack bottom is placed in described lifting jack pickup groove, and described pressure-like head and described top pressure-like head and described pressure-like dies cavity are slidably matched,
Also comprise strain gauge and displacement transducer, the induction position of described strain gauge is arranged on the bottom of described top pressure-like head, and the transmission rod of described displacement transducer is connected with the pressure head of described lifting jack.
2. Stress Control formula geotechnique sample-pressing device as claimed in claim 1, it is characterized in that, on described pressure-like base plate, be also provided with the second lifting jack pickup groove, position corresponding with described the second lifting jack pickup groove on described pressure-like top board has demoulding mouth, and described demoulding mouth is that through hole and diameter are identical with the internal diameter of described pressure-like mould.
3. Stress Control formula geotechnique sample-pressing device as claimed in claim 1, is characterized in that, at the top of described pressure-like top board, sensor display screen is installed, in order to show the data of sensor transmissions.
4. Stress Control formula geotechnique sample-pressing device as claimed in claim 1, is characterized in that, described connecting link has four in the position at four angles, described pressure-like top board and described pressure-like base plate to be linked together respectively.
5. as described in as arbitrary in claim 1 to 4, Stress Control formula geotechnique sample-pressing device, is characterized in that, described pressure-like mould is cylindrical shape, and its internal diameter is corresponding with the cross-sectional diameter of described pressure-like head and top pressure-like head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320370779.7U CN203572696U (en) | 2013-06-26 | 2013-06-26 | Stress control type geotechnical sample compactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320370779.7U CN203572696U (en) | 2013-06-26 | 2013-06-26 | Stress control type geotechnical sample compactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203572696U true CN203572696U (en) | 2014-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320370779.7U Withdrawn - After Issue CN203572696U (en) | 2013-06-26 | 2013-06-26 | Stress control type geotechnical sample compactor |
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| CN (1) | CN203572696U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344468A (en) * | 2013-06-26 | 2013-10-09 | 兰州大学 | Stress control type soil engineering sample pressing apparatus |
| CN104198254A (en) * | 2014-09-18 | 2014-12-10 | 华北水利水电大学 | Density-controllable geotechnical triaxial sample preparation device |
| CN105865875A (en) * | 2016-05-18 | 2016-08-17 | 北京安赛博技术有限公司 | Experimental device for keeping consistency of soil physical properties |
-
2013
- 2013-06-26 CN CN201320370779.7U patent/CN203572696U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344468A (en) * | 2013-06-26 | 2013-10-09 | 兰州大学 | Stress control type soil engineering sample pressing apparatus |
| CN104198254A (en) * | 2014-09-18 | 2014-12-10 | 华北水利水电大学 | Density-controllable geotechnical triaxial sample preparation device |
| CN104198254B (en) * | 2014-09-18 | 2016-06-29 | 华北水利水电大学 | Controlling density formula geotechnique's three axle sample preparation devices |
| CN105865875A (en) * | 2016-05-18 | 2016-08-17 | 北京安赛博技术有限公司 | Experimental device for keeping consistency of soil physical properties |
| CN105865875B (en) * | 2016-05-18 | 2018-09-11 | 北京安赛博技术有限公司 | A kind of experimental provision keeping soil physical property consistency |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140430 Effective date of abandoning: 20160113 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |