CN216051312U - Vacuum combined surcharge preloading experimental device - Google Patents
Vacuum combined surcharge preloading experimental device Download PDFInfo
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- CN216051312U CN216051312U CN202121731528.8U CN202121731528U CN216051312U CN 216051312 U CN216051312 U CN 216051312U CN 202121731528 U CN202121731528 U CN 202121731528U CN 216051312 U CN216051312 U CN 216051312U
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- barrel
- vacuum
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- experimental device
- sleeve
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Abstract
A vacuum combined preloading experimental device. The device comprises a barrel cover, an external fixing device, a barrel body, a vacuum valve, a piston rod, a barrel bottom, a drainage valve, a pressure block, a sleeve, a conduit and a pore water pressure gauge; the vacuum combined surcharge preloading experimental device provided by the utility model has the advantages and positive effects that: the method has the advantages of simple and easily obtained manufacturing materials, low manufacturing cost and movable reuse, can obtain the treatment effect of independently considering any treatment mode in the test process, can work simultaneously, improves the treatment efficiency, shortens the treatment time, and particularly has better treatment effect on sludge soft soil with high compressibility and large water content.
Description
Technical Field
The utility model belongs to the technical field of soil sample indoor experimental devices, and particularly relates to a vacuum combined surcharge preloading experimental device.
Background
At present, the vacuum preloading method and the preloading method are widely applied to foundation treatment, but the treatment effect of the outdoor experiment of the vacuum preloading method is influenced by the soil layer properties and the external conditions, and even after the surface of the soil layer is covered with an airtight material, the treatment effect of the vacuum negative pressure on the soil body cannot be ensured, so that the convincing experiment result, particularly the sandy soil foundation, cannot be summarized. In view of the situation, domestic and foreign scholars propose an experimental device of an indoor vacuum preloading method, and although the device can effectively solve the problems, the vacuum preloading treatment method is not ideal in the actual situation of treating soft soil or silt soft soil foundation.
Disclosure of Invention
In order to solve the problems, the utility model aims to provide a vacuum combined surcharge preloading experimental device which is simple to manufacture, can measure various data and has good stability.
In order to achieve the aim, the vacuum combined surcharge preloading experimental device provided by the utility model comprises a barrel cover, an external fixing device, a barrel body, a vacuum valve, a piston rod, a barrel bottom, a drainage valve, a pressure block, a sleeve, a guide pipe and a pore water pressure gauge; the upper port of the barrel body is detachably provided with a barrel cover, and the bottom of the barrel body is a barrel bottom; the external fixing device is fixed on the outer surface of the barrel body in a surrounding manner so as to ensure that the barrel body is not deformed in the vacuum pumping process; one end of the conduit is connected to the barrel bottom; the drainage valve and the pore water pressure gauge are arranged on the guide pipe; the sleeve is arranged in the barrel body, and the lower end of the sleeve is fixed on the barrel bottom; the pressure block is arranged in the sleeve in a mode of moving up and down; a vacuum valve is arranged on the barrel cover; the lower end of the piston rod penetrates through the middle of the barrel cover and then is connected to the middle of the top surface of the pressure block.
The barrel cover consists of outer-layer bakelite and inner-layer rubber and is connected with the upper port of the barrel body in a threaded manner.
The external fixing device consists of a reinforcing ring and an iron ring, wherein the reinforcing ring is made of a composite wood board and is bonded on the outer surface of the barrel body by epoxy resin, and the outer surface of the reinforcing ring is coated with a layer of sealing wax and is fixed by the iron ring arranged outside.
The barrel body is made of iron sheet.
The piston rod is made of steel.
The sleeve and the guide pipe are made of organic glass.
The vacuum combined surcharge preloading experimental device provided by the utility model has the advantages and positive effects that: the method has the advantages of simple and easily obtained manufacturing materials, low manufacturing cost and movable reuse, can obtain the treatment effect of independently considering any treatment mode in the test process, can work simultaneously, improves the treatment efficiency, shortens the treatment time, and particularly has better treatment effect on sludge soft soil with high compressibility and large water content.
Drawings
Fig. 1 is a schematic view of the internal structure of the vacuum combined surcharge preloading experimental device provided by the utility model.
Fig. 2 is a sectional view taken along a-a in fig. 1.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are enumerated in conjunction with the accompanying drawings, and the following detailed description is given:
as shown in fig. 1 to 2, the vacuum combined preloading experimental device provided by the utility model comprises a barrel cover 1, an external fixing device 2, a barrel body 3, a vacuum valve 4, a piston rod 5, a barrel bottom 6, a drainage valve 7, a pressure block 8, a sleeve 9, a conduit 10 and a pore water pressure gauge 11; the upper port of the barrel body 3 is detachably provided with a barrel cover 1, and the bottom of the barrel body is a barrel bottom 6; the external fixing device 2 is fixed on the outer surface of the barrel body 3 in a surrounding manner so as to ensure that the barrel body 3 is not deformed in the vacuumizing process; one end of the conduit 10 is connected with the barrel bottom 6; the drainage valve 7 and the pore water pressure gauge 11 are arranged on the guide pipe 10; the sleeve 9 is arranged inside the barrel body 3, and the lower end of the sleeve is fixed on the barrel bottom 6; the pressure block 8 is arranged in the sleeve 9 in a manner of moving up and down; a vacuum valve 4 is arranged on the barrel cover 1; the lower end of the piston rod 5 penetrates through the middle part of the barrel cover 1 and then is connected to the middle part of the top surface of the pressure block 8.
The barrel cover 1 is composed of outer-layer bakelite and inner-layer rubber and is connected with the upper port of the barrel body 3 in a threaded mode, the airtightness of the barrel body 3 can be effectively improved in the vacuumizing process, and meanwhile, the bakelite has an insulating effect.
The external fixing device 2 is composed of a reinforcing ring and an iron ring, wherein the reinforcing ring is made of a composite wood board and is bonded on the outer surface of the barrel body 3 by epoxy resin, and the outer surface of the reinforcing ring is coated with a layer of sealing wax and is fixed by the iron ring arranged outside, so that the weight is light, and the processing and the manufacturing are convenient.
The barrel body 3 is made of iron sheet, so that the cost is low, and the processing and the manufacturing are convenient.
The piston rod 5 is made of steel materials and is stable and reliable in structure.
The sleeve 9 and the guide pipe 10 are made of organic glass, so that the weight is light and observation is convenient.
The use method of the vacuum combined surcharge preloading experimental device provided by the utility model is explained as follows:
when the test tube is used, an experimenter firstly places samples such as silt soft soil and the like in the sleeve 9, then places the pressure block 8 in the sleeve 9, and screws the barrel cover 1; and then, a vacuum pump is utilized to apply negative pressure to the interior of the barrel body 3 through the vacuum valve 4, when the negative pressure is increased to a certain value, the piston rod 5 moves downwards, and certain pressure is applied to the sample through the pressure block 8 according to actual requirements or design parameters, so that the preloading filling soil body is simulated. At the same time, the drain valve 7 of the guide tube 10 is opened to drain the pore water squeezed out of the sample, and the pore water pressure is detected by the pore water pressure gauge 11.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (6)
1. The utility model provides a preloading experimental apparatus is jointly piled in vacuum which characterized in that: the vacuum combined surcharge preloading experimental device comprises a barrel cover (1), an external fixing device (2), a barrel body (3), a vacuum valve (4), a piston rod (5), a barrel bottom (6), a drainage valve (7), a pressure block (8), a sleeve (9), a conduit (10) and a pore water pressure gauge (11); wherein, the upper port of the barrel body (3) is detachably provided with a barrel cover (1), and the bottom of the barrel body is a barrel bottom (6); the external fixing device (2) is fixed on the outer surface of the barrel body (3) in a surrounding manner so as to ensure that the barrel body (3) is not deformed in the vacuum pumping process; one end of the conduit (10) is connected with the barrel bottom (6); the drainage valve (7) and the pore water pressure gauge (11) are arranged on the guide pipe (10); the sleeve (9) is arranged inside the barrel body (3), and the lower end of the sleeve is fixed on the barrel bottom (6); the pressure block (8) is arranged in the sleeve (9) in a manner of moving up and down; a vacuum valve (4) is arranged on the barrel cover (1); the lower end of the piston rod (5) penetrates through the middle of the barrel cover (1) and then is connected to the middle of the top surface of the pressure block (8).
2. The vacuum combined surcharge preloading experimental device as claimed in claim 1, wherein: the barrel cover (1) consists of outer-layer bakelite and inner-layer rubber and is connected with the upper port of the barrel body (3) in a threaded manner.
3. The vacuum combined surcharge preloading experimental device as claimed in claim 1, wherein: the external fixing device (2) is composed of a reinforcing ring and an iron ring, wherein the reinforcing ring is made of a composite wood board and is bonded on the outer surface of the barrel body (3) through epoxy resin, and the outer surface of the reinforcing ring is coated with a layer of sealing wax and is fixed by the iron ring arranged outside.
4. The vacuum combined surcharge preloading experimental device as claimed in claim 1, wherein: the barrel body (3) is made of iron sheet.
5. The vacuum combined surcharge preloading experimental device as claimed in claim 1, wherein: the piston rod (5) is made of steel.
6. The vacuum combined surcharge preloading experimental device as claimed in claim 1, wherein: the sleeve (9) and the guide pipe (10) are made of organic glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121731528.8U CN216051312U (en) | 2021-07-28 | 2021-07-28 | Vacuum combined surcharge preloading experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121731528.8U CN216051312U (en) | 2021-07-28 | 2021-07-28 | Vacuum combined surcharge preloading experimental device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216051312U true CN216051312U (en) | 2022-03-15 |
Family
ID=80618325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121731528.8U Expired - Fee Related CN216051312U (en) | 2021-07-28 | 2021-07-28 | Vacuum combined surcharge preloading experimental device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216051312U (en) |
-
2021
- 2021-07-28 CN CN202121731528.8U patent/CN216051312U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220315 |