CN205449344U - Cut stress test device - Google Patents
Cut stress test device Download PDFInfo
- Publication number
- CN205449344U CN205449344U CN201620292498.8U CN201620292498U CN205449344U CN 205449344 U CN205449344 U CN 205449344U CN 201620292498 U CN201620292498 U CN 201620292498U CN 205449344 U CN205449344 U CN 205449344U
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- supporting body
- sensor
- shear stress
- test device
- posting
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Abstract
The utility model belongs to the local some stress test field of geotechnical engineering experiment shear surface specifically is a cut stress test device, including passing carrier, supporting body, sensor and strain gauge, the biography carrier is located in the supporting body, and can slide in the supporting body, the sensor is the ring -type, and its inner wall posts the foil gage, the foil gage pass through the circuit with the strain gauge is connected, the sensor is located the supporting body, and can the quilt it is in to pass the carrier slip extrusion in the supporting body. The beneficial effects are that simple structure, the operation is convenient, can record local shearing stress on the ground structural plane.
Description
Technical field
This utility model belongs to Geotechnical Engineering experiment shear surface partial points stress test field, specifically a kind of shear stress test device.
Background technology
Assay method at geotechnical engineering structure engineering specimen test shear stress: measuring it with patch foil gauge and go out shear stress in the strain of test formula by formula scales, it belongs to measurement indirectly.It is known that structural test piece (concrete sample, steel construction test specimen etc.) innately has paster convenience, reliable advantage, this measuring method is used till today, also achieves substantial amounts of scientific achievement.
Geotechnical Engineering test is all the shear stress utilizing sensor to measure the soil body, and is all the result under average.As common direct shearing test utilize the deformation of NOL ring to measure value of shearing, maximum of which shortcoming be exactly all of measurement be all meansigma methods, meansigma methods only represents average level, it is impossible to represent certain point occurrence.The biggest error of size of test test specimen is the biggest, and size is the least closer to practical situation, and the value of shearing error that the most large-scale coarse-grained soil staight scissors, compression test are measured is bigger than normal.Generally speaking, in recent decades, measuring method as classical soil body shear stress does not has the biggest change, and model experiment deep sliding surface shear stress cannot be regret feelings by existing apparatus measures, shearing stress distribution on substantial amounts of scholar's research structural plane proposes various mathematical model, but be all the result derived theoretically, test measure the shear stress numerical value of partial points on structural plane almost without, reason is exactly not measure the equipment of deep sliding surface shear stress.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of simple in construction, and operation is convenient, it is possible to record the shear stress test device of the shear stress of partial points on geotechnical structure face.
The technical scheme that this utility model solves above-mentioned technical problem is as follows: a kind of shear stress test device, including posting body, supporting body, sensor and deformeter, described posting body is positioned at described supporting body, and can slide in described supporting body, in the form of a ring, its inwall posts foil gauge to described sensor, and described foil gauge is connected with described deformeter by circuit, described sensor is positioned at supporting body, and can be extruded by the slip in described supporting body of the described posting body.
Further, described posting body rectangular-blocklike, described supporting body is open-topped rectangular box shape, and described posting body and described supporting body contact with each other and be provided with roller bearing row between sidewall.
Further, the position of the corresponding described sensor of the open top of described supporting body is provided with the baffle plate covering described sensor.
Further, the sidewall of the corresponding described sensor of described supporting body offering line-entering hole, described circuit is connected with described foil gauge through described line-entering hole away from one end of described deformeter.
Further, described sensor is steel annulus.
Further, described posting body is made up of concrete or rock or cement mortar or soil.
The beneficial effects of the utility model are: simple in construction, and operation is convenient, and the shear stress τ of the described posting body upper surface each point obtained is the shear stress of partial points on geotechnical structure face.
Accompanying drawing explanation
Fig. 1 is vertical view cutaway drawing of the present utility model；
Fig. 2 is top view of the present utility model；
In accompanying drawing, the list of parts representated by each label is as follows:
1, supporting body, 2, roller bearing row, 3, posting body, 4, sensor, 5, circuit, 6. deformeter, 7, baffle plate.
Detailed description of the invention
Being described principle of the present utility model and feature below in conjunction with accompanying drawing, example is served only for explaining this utility model, is not intended to limit scope of the present utility model.
As depicted in figs. 1 and 2, a kind of shear stress test device, including posting body 3, supporting body 1, sensor 4 and deformeter 6, posting body 3 is positioned at supporting body 1, and can slide in supporting body, and sensor 4 is in the form of a ring, its inwall posts foil gauge, foil gauge is connected with deformeter 6 by circuit 5, and sensor 4 is positioned at supporting body 1, and can be extruded by the posting body 3 slip in supporting body 1.
Preferably, posting body 3 rectangular-blocklike, a size of 50mmx100mmx20mm, supporting body 1 is in open-topped rectangular box shape, and posting body 3 and supporting body 1 contact with each other and be provided with roller bearing row 2 between sidewall, improve posting body 3 and supporting body 1 structural reliability, utilizing undersized posting body 3 to carry out shear stress detection, accuracy of detection is high, utilizes the friction between roller bearing row 2 reduction posting body 3 and supporting body 1 contact surface, improve the service life of this device, and eliminate the impact rubbed on shear stress test.
Preferably, the position of the open top respective sensor 4 of supporting body 1 is provided with the baffle plate 7 covering sensor 4, it is to avoid sensor 4 is covered by ground, improves its accuracy of detection.
Preferably, the sidewall of supporting body 1 respective sensor 4 offering line-entering hole, circuit 5 is connected with foil gauge through line-entering hole away from one end of deformeter 6, it is simple to the layout of circuit 5.
Preferably, sensor 4 is steel annulus, improves the intensity of sensor 4, and then improves its accuracy of detection.
Preferably, posting body 3 is made up of rock, in order to mate rock shear stress test experiments environment.
Use the shear stress of partial points on above-mentioned shear stress test device detection rock structural face, comprise the following steps:
S1, measure the area A of described posting body (3) upper surface, use F-n relation curve caliberating device to demarcate to exert oneself the relation curve of F and dependent variable n；
S2, the trough reserving supporting body 1 on the surface of simulation rock pre-buried wire barrel；
S3, supporting body 1 is put into trough, the surface of supporting body 1 flushes with the surface of simulation rock and the material of posting body 3 is consistent with simulation rock material, circuit 5 is connected with deformeter 6 through wire barrel away from one end of sensor 4, check that deformeter 6 is connected with sensor 4, complete the installation of shear stress detection device；
S4, simulation rock surface landfill have cover supporting body 1 earth material；
S5, described earth material are in described supporting body areal deformation or slip generation power F, this power F drives described posting body (3) to slide in described supporting body (1), described sensor (4) is extruded by this power F by described posting body (3), and described deformeter (6) records the change procedure of described sensor (4) each stress point dependent variable n；
Power F that S6, the dependent variable recorded by deformeter 6 and sensor 4 have been demarcated and the relation curve of dependent variable n must be exerted oneself F, then drawn the shear stress τ of posting body 3 upper surface each point, the i.e. shear stress of partial points on rock structural face by τ=F/A.
Preferably, described F-n relation curve caliberating device is MST caliberating device, it is ensured that F-n relation curve is demarcated accurately.
Preferably, the described earth material deformation on described supporting body surface or slide is occurred by pressue device pressurization or the deadweight of described earth material drives and occurs, it is achieved the deformation on described supporting body surface of the described earth material or slip.
Preferably, described pressue device is hydraulic press, it is ensured that described earth material is in the stability deforming or sliding on described supporting body surface, and then guarantees to test accuracy.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (6)
1. a shear stress test device, it is characterized in that: include posting body (3), supporting body (1), sensor (4) and deformeter (6), described posting body (3) is positioned at described supporting body (1), and can slide in described supporting body, described sensor (4) is in the form of a ring, its inwall posts foil gauge, described foil gauge is connected with described deformeter (6) by circuit (5), described sensor (4) is positioned at supporting body (1), and can be extruded by the slip in described supporting body (1) of the described posting body (3).
A kind of shear stress test device the most according to claim 1, it is characterized in that: described posting body (3) rectangular-blocklike, described supporting body (1) is in open-topped rectangular box shape, and described posting body (3) and described supporting body (1) contact with each other and be provided with roller bearing row (2) between sidewall.
A kind of shear stress test device the most according to claim 2, it is characterised in that: the position of the corresponding described sensor (4) of the open top of described supporting body (1) is provided with the baffle plate (7) covering described sensor (4).
4. test device according to a kind of shear stress described in any one of claims 1 to 3, it is characterized in that: offer line-entering hole on the sidewall of the corresponding described sensor of described supporting body (1) (4), described circuit (5) is connected with described foil gauge through described line-entering hole away from one end of described deformeter (6).
5. test device according to a kind of shear stress described in any one of claims 1 to 3, it is characterised in that: described sensor (4) is steel annulus.
6. test device according to a kind of shear stress described in any one of claims 1 to 3, it is characterised in that: described posting body (3) is made up of concrete or rock or cement mortar or soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620292498.8U CN205449344U (en) | 2016-04-08 | 2016-04-08 | Cut stress test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620292498.8U CN205449344U (en) | 2016-04-08 | 2016-04-08 | Cut stress test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205449344U true CN205449344U (en) | 2016-08-10 |
Family
ID=56606639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620292498.8U Expired - Fee Related CN205449344U (en) | 2016-04-08 | 2016-04-08 | Cut stress test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205449344U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758559A (en) * | 2016-04-08 | 2016-07-13 | 干飞 | Shear stress testing device and method |
| CN109667256A (en) * | 2018-11-29 | 2019-04-23 | 浙江大学 | It is a kind of for measuring the device and method of railway, highway subgrade and embankment slope soil body shear stress |
-
2016
- 2016-04-08 CN CN201620292498.8U patent/CN205449344U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758559A (en) * | 2016-04-08 | 2016-07-13 | 干飞 | Shear stress testing device and method |
| CN105758559B (en) * | 2016-04-08 | 2019-06-25 | 干飞 | A kind of shear stress test device and method |
| CN109667256A (en) * | 2018-11-29 | 2019-04-23 | 浙江大学 | It is a kind of for measuring the device and method of railway, highway subgrade and embankment slope soil body shear stress |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20160810 Termination date: 20170408 |