CN201892638U - Triaxial length-extruding tester in soil engineering - Google Patents
Triaxial length-extruding tester in soil engineering Download PDFInfo
- Publication number
- CN201892638U CN201892638U CN2010206492257U CN201020649225U CN201892638U CN 201892638 U CN201892638 U CN 201892638U CN 2010206492257 U CN2010206492257 U CN 2010206492257U CN 201020649225 U CN201020649225 U CN 201020649225U CN 201892638 U CN201892638 U CN 201892638U
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- piston
- loading
- compression sensor
- length
- cap
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Abstract
The utility model relates to a triaxial length-extruding tester in soil engineering, comprising a pressure chamber, a lifting platform capable of lifting, and a compression sensor, wherein only contact pressurization is adopted between a piston and a loading cap and between a piston loading rod and the compression sensor which are arranged at the center of the pressure chamber in a sliding manner. Threaded connection between the piston and the loading cap and between the piston loading rod and the compression sensor is realized, the compression sensor is fixed, and the drawing process of the loading piston is realized by lowering a base; and due to addition of the length-extruding test which can not be realized by the conventional triaxial apparatus in the soil engineering, different stress path tests of soil bodies of the existing engineering can be better met.
Description
Technical field
The utility model relates to a kind of test instrument, especially a kind of three crowded long test instruments of geotechnique that are applicable to the crowded long test of the soil body.
Background technology
China is a coal big country, and is along with fast development of national economy, more and more important as the underground mining activities of main energy sources supply.Recovery process has produced disturbance to foundation soil body, and can find out that from the total stress path (TSP) of foundation soil disturbance compressive region beats principal direction of stress and change, and long destruction appears squeezing in the soil body.At present, the structure of normal triaxial instrument determines it can only satisfy the test situation of axial force greater than confined pressure.
Summary of the invention
The purpose of this utility model is the weak point that overcomes in the prior art, provides three simple in structure, easy to operate of geotechniques to squeeze long test instrument.
For achieving the above object, test instrument of the present utility model comprises lifting table, covers on the pressure shield on the lifting table, be provided with the fixedly loading cap of sample in the pressure shield, pressure shield is provided with inserts the loading piston that links together with the loading cap in its top cover, load piston and pressure shield top cover and be slidingly matched, the top that loads piston is provided with tension-compression sensor.
The described loading piston that links together with the loading cap is for being threaded; Described tension-compression sensor is connected with the loading piston thread.
Beneficial effect: the utility model is given the sample application of force by loading piston, and realizes increasing the pulling force that loads piston by lifting table, controls axial stress in real time.The stress that the load bar pulling force produces can be offset the stress of a part of water, has realized retainer shaft to constant pressure, applies the side direction confined pressure, carries out the crowded long test of sample; Can satisfy the requirement of normal triaxial compression test, can satisfy sample again and squeeze long testing requirements.On the basis that does not influence the triaxial apparatus original function, realize the crowded long test of sample, it is simple in structure, and is easy to operate, and test effect is good, and the scope of application is wide.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: the 1-tension-compression sensor, the 2-load bar, 3-loads cap, 4-pressure shield, 5-sample, 6-lifting table.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is further described:
Geotechnological three crowded long test instruments of the present utility model mainly are made of lifting table 6, pressure shield 4, loading cap 3, loading piston 2 and tension-compression sensor 1.Pressure shield 4 covers on and forms a pressure chamber on the lifting table 6, be provided with the fixedly loading cap 3 of sample 5 in the pressure shield 4, pressure shield 4 is provided with inserts the loading piston 2 that links together with loading cap 3 in its top cover, load piston 2 and be slidingly matched, and load loading piston 2 that cap 3 links together for being threaded with pressure shield 4 top covers; The top that loads piston 2 is provided with tension-compression sensor 1; Tension-compression sensor 1 is threaded with loading piston 2.
The course of work: loading piston 2 bottoms that pressure shield top cover center cunning is joined are threaded with 3 employings of loading cap; Loading piston 2 tops that pressure shield top cover center cunning is joined are adopted with tension-compression sensor 1 and are threaded; Tension-compression sensor 1 upper end is fixed, water filling in pressing cover 4, because water is incompressible, the test starting condition is that the initial stress state of sample is determined, realize squeezing long process by the pressure regulation of normal triaxial instrument with increasing confined pressure, the pressure chamber offsets the stress of axial increase by the sample loading procedure is axially produced a pulling force, thereby realizes squeezing long process of the test.
Claims (3)
1. three of geotechniques squeeze long test instrument, it is characterized in that: it comprises lifting table (6), covers on the pressure shield (4) on the lifting table (6), be provided with the fixedly loading cap (3) of sample (5) in the pressure shield (4), pressure shield (4) is provided with inserts the loading piston (2) that links together with loading cap (3) in its top cover, load piston (2) and be slidingly matched with pressure shield (4) top cover, the top that loads piston (2) is provided with tension-compression sensor (1).
2. geotechnological three according to claim 1 are squeezed long test instrument, it is characterized in that: the described loading piston (2) that links together with loading cap (3) is for being threaded.
3. geotechnological three according to claim 1 are squeezed long test instrument, it is characterized in that: described tension-compression sensor (1) is threaded with loading piston (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206492257U CN201892638U (en) | 2010-12-09 | 2010-12-09 | Triaxial length-extruding tester in soil engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206492257U CN201892638U (en) | 2010-12-09 | 2010-12-09 | Triaxial length-extruding tester in soil engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201892638U true CN201892638U (en) | 2011-07-06 |
Family
ID=44222111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206492257U Expired - Fee Related CN201892638U (en) | 2010-12-09 | 2010-12-09 | Triaxial length-extruding tester in soil engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201892638U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519294A (en) * | 2018-04-08 | 2018-09-11 | 中交第航务工程勘察设计院有限公司 | Triaxial extension test device |
-
2010
- 2010-12-09 CN CN2010206492257U patent/CN201892638U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519294A (en) * | 2018-04-08 | 2018-09-11 | 中交第航务工程勘察设计院有限公司 | Triaxial extension test device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110706 Termination date: 20131209 |