CN205808897U - A kind of adhesion tester that can eliminate pull of vacuum impact - Google Patents
A kind of adhesion tester that can eliminate pull of vacuum impact Download PDFInfo
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- CN205808897U CN205808897U CN201620069636.6U CN201620069636U CN205808897U CN 205808897 U CN205808897 U CN 205808897U CN 201620069636 U CN201620069636 U CN 201620069636U CN 205808897 U CN205808897 U CN 205808897U
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- combination type
- inner disc
- survey dish
- type survey
- pull
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Abstract
The utility model discloses a kind of adhesion tester that can eliminate pull of vacuum impact, including loading unit and measuring unit；Loading unit includes threephase asynchronous, triaxial shear equipment, and model groove, combination type survey dish, fixed mount and weights, model groove is fixed on triaxial shear equipment, and fixed mount is fixed on model groove；Measuring unit includes pull pressure sensor and displacement transducer, and displacement transducer is arranged on combination type survey dish；The upper connecting rod of pulling force sensor is fixed with the crossbeam of triaxial shear equipment, and for removably connecting between lower link and the combination type survey dish of pulling force sensor, weights is placed on combination type survey dish；Combination type survey dish includes outer disk and inner disc, and inner disc is provided with the tapped through hole of multiple up/down perforation, and each tapped through hole is equipped with a dismountable plug.Use this utility model can the most smoothly apply uplift load and by controlling soil sample surface and air phase gating condition, get rid of the pull of vacuum impact on structure.
Description
Technical field
This utility model relates to pulling out the adhesion test research device technical field that works is subject to, and particularly relating to one can disappear
Adhesion measurement apparatus except pull of vacuum impact.
Background technology
Soil and works between adhesion be one by multiple factors (as soil type, moisture content, contact material characteristic, drawing
Speed and external loads etc.) complication system that affects.Generally believe that absorption affinity is mainly made up of three parts at present, i.e. drawing
Adhesion between negative pore pressure, soil and the works of development and the side friction between works and the soil body in journey.In engineering construction,
The evaluation of works breakout capacity is the key of engineering success or failure；But for the size of absorption affinity, Practical Project is difficult to determine,
For playing the absorption affinity providing works safety guarantee effect, research worker for the purpose of safety, ignores its antagonism
Pulling out the impact of works bearing capacity, the resistance to plucking bearing capacity which results in works is underestimated, and makes the lifting in refloating operation
Equipment cannot meet requirement.
Saturated clay foundation structure thing floating or on pull out during, basis is in unloading condition, from principle of effective stress,
The substrate position soil body can produce negative pore water pressure and stop basis to move upward；Due to the effect of negative pore pressure, base lower portion and week
Enclosing water in the soil body can flow at basad place, along with moving upward of basis, negative pore pressure also fades away；Consider soil body adhesion
During problem, land movement corresponding when reaching adhesion strength directly determines the development degree of negative pore pressure size, and then determines
The size of overall absorption affinity.
In order to explore the adhesive mechanism between the soil body and works and the adhesion Changing Pattern with its influence factor, Qian Renyan
Study carefully and devise multiple test apparatus equipment.Originally test apparatus is simpler and cruder, and stringency of test is relatively low.Along with
Experimental study technology develops further and test theory is gradually improved, and testing equipment is also towards automation development, test accuracy
There has also been and increase substantially, the research of test method and the improvement of instrument and equipment are the biggest to fully realizing and utilize adhesion to rise
Impetus.The utility models such as Ren Luquan tester for soil viscosity force, this instrument is mainly by charger, dynamometry parts
(sensor) and survey dish form, and entirety is surveyed dish and is changed to combine survey dish, and the effect of combination survey dish makes inner disc not clay exactly.
But the tray bottom soil body surveyed in process of the test by above-mentioned instrument can produce stretching strain with the drawing of survey dish, thus will produce certain
Negative excess pore water pressure.Owing to the bottom pore water pressure of this survey dish cannot dissipate in time, the pore water pressure meeting in soil
Accumulative, the adhesion recorded will comprise excess pore water pressure, thus adhesion accurately cannot be obtained.
Utility model content
For above-mentioned prior art, this utility model provides a kind of adhesion experiment with measuring dress that can eliminate pull of vacuum impact
Put, can the most smoothly apply uplift load during use and by controlling soil sample surface and air phase gating condition, row
Except the pull of vacuum impact on structure.
In order to solve above-mentioned technical problem, a kind of adhesion that can eliminate pull of vacuum impact that the utility model proposes measures examination
Experiment device, including loading unit and measuring unit；Described loading unit includes threephase asynchronous, triaxial shear equipment, mould
Type groove, combination type survey dish, fixed mount and weights, described triaxial shear equipment is provided with two support bars, two support bars
Top be provided with crossbeam, described model groove is fixed on described triaxial shear equipment, and described fixed mount is fixed on described model groove；
Described measuring unit includes that pull pressure sensor and displacement transducer, institute's displacement sensors are arranged on described combination type survey dish
On；The crossbeam of the upper connecting rod of described pulling force sensor and described triaxial shear equipment is fixed, the lower link of described pulling force sensor with
For removably connecting between described combination type survey dish, described weights is placed on described combination type survey dish；Described combination type
Survey dish includes outer disk and round table-like inner disc, and described outer disk is provided with inverted cone centre bore, and described round table-like inner disc is assemblied in institute
Stating in inverted cone centre bore, described inner disc is provided with the tapped through hole of multiple up/down perforation, and each tapped through hole is equipped with one
Individual dismountable plug.
Further, the upper surface of described inner disc is provided with screwed hole, and the end of described pulling force sensor lower link is provided with external screw thread,
For threadeding between described pulling force sensor lower link and described inner disc.Described tapped through hole is the most flat with described inner disc
OK.Described plug uses screw-rod structure.
Compared with prior art, the beneficial effects of the utility model are:
(1) mode that this utility model uses the threephase asynchronous supporting with triaxial shear equipment to decline model groove is drawn
Pull out, not only can control elevation rate according to the requirement of test, and stable drawing can be realized.
(2) on the inner disc of combination type survey dish, it is provided with the tapped through hole of four up/down perforations, and is that each tapped through hole is equipped with
Having the plug of a screw-rod structure, the plug in corresponding tapped through hole (is backed out i.e. by the through hole opening in test varying number
Can), control soil sample surface and air phase gating condition with this so that mud face (i.e. the upper surface of the soil body 8) is at combination type survey dish
Keeping excess pore water pressure in drawing process is zero, so that it is guaranteed that do not comprise excess pore water in the drawing load that records of test instrunment
The effect of pressure, also can ensure that the impact eliminating excess pore water pressure to adhesion simultaneously.Try to get to the heart of a matter due to inner disc and soil sample connects
Touching, there is not side friction between inner disc and soil sample, in the case of not having pull of vacuum, the pulling force F measured by test can represent
For: F=WS+CaA, in formula: WsFor combination type survey dish and the weight of the weights of precompressed；A is inner tray bottom area；
CaFor adhesion strength, its size be on unit area the weight of measured pulling force and combination type survey dish and the weights of precompressed it
Difference.
Accompanying drawing explanation
Fig. 1 is that this utility model is a kind of for measuring adhesion tester structural representation；
Fig. 2 is the top view of the combination type survey dish shown in Fig. 1；
Fig. 3 is the front sectional view of the combination type survey dish shown in Fig. 2；
Fig. 4 is the structural representation of the outer disk shown in Fig. 3；
Fig. 5 is the structural representation of the inner disc shown in Fig. 3.
In figure: 1-pulling force sensor, 2-counterweight, 3-model groove, 4-displacement transducer, 5-fixed mount, 6-combination type survey dish,
61-outer disk, 62-inner disc, 63-tapped through hole, 64-central blind hole, 65-taper hole, 66-plug, 7-triaxial shear equipment, 8-soil
Body.
Detailed description of the invention
Being described in further detail technical solutions of the utility model with specific embodiment below in conjunction with the accompanying drawings, described is concrete
This utility model is only explained by embodiment, not in order to limit this utility model.
A kind of adhesion experiment with measuring device that can eliminate pull of vacuum impact that the utility model proposes, including loading unit and
Measuring unit.
As it is shown in figure 1, described loading unit includes threephase asynchronous, triaxial shear equipment 7, model groove 3, combination type
Survey dish 6, fixed mount 5 and weights 2, described triaxial shear equipment 7 is provided with two support bars, the top of two support bars
End is provided with crossbeam, and described fixed mount 5 is fixed on described triaxial shear equipment 7, and described model groove 3 is fixed on described fixed mount
On 5.Described measuring unit includes pull pressure sensor 1 and displacement transducer 4.Institute's displacement sensors 4 is arranged on described
On combination type survey dish 6；The upper connecting rod of described pulling force sensor 1 is fixed with the crossbeam of described triaxial shear equipment, and described pulling force passes
For removably connecting between lower link and the described combination type survey dish 6 of sensor, in the present embodiment, the upper table of described inner disc 62
Face is provided with screwed hole 64, and the end of described pulling force sensor lower link is provided with external screw thread, described pulling force sensor lower link and institute
Stating for threaded between inner disc 62, described weights 2 is placed on described combination type survey dish 6；Such as Fig. 2 and Fig. 3
Shown in, described combination type survey dish 6 includes outer disk 61 and round table-like inner disc 62, and described outer disk 61 is provided with inverted cone centre bore
65 (such as Fig. 4), described round table-like inner disc 62 is assemblied in described inverted cone centre bore 65 (as shown in Figure 3), described
Inner disc 62 is provided with the tapped through hole 63 of multiple up/down perforation, selects to open the spiral shell on inner disc 62 according to soil sample 8 practical situation
The number of stricture of vagina through hole 63, remaining tapped through hole 63 is then blocked with plug 66.During test, one or more logical by opening
Hole makes combination type survey dish 6 substrate soil face communicate with ambient atmosphere so that pore water pressure dissipates immediately, and eliminates vacuum suction
The impact of power.In the present embodiment, described tapped through hole 63 and axially in parallel (as shown in Figure 3 and Figure 5) of described inner disc 62.
Each tapped through hole 63 is equipped with a dismountable plug 66, and in the present embodiment, described plug 66 uses screw-rod structure
(as shown in Figure 2).
Test is carried out in model groove 3, and model groove 3 is placed on triaxial shear equipment 7, and the size of model groove 3 should expire
Foot test requirements document and unsuitable excessive, it is recommended that a diameter of 35cm.Outer disk 61 highly recommended in combination type survey dish 6 is 1.5cm,
A diameter of 11cm, inner disc 62 is highly consistent with outer disk 61, and inner disc 62 base diameter is 5.5cm, and top diameter is 8cm.
The number of the tapped through hole 63 of the up/down perforation on inner disc 62 is recommended as 4, and the diameter of tapped through hole is recommended as 5mm.
Before on-test, according to test requirements document by satisfactory for soil sample furnishing moisture content soil cream, store in being placed in hermetic container
About 24h；Then the sample that modulates is loaded in model groove 3, and stirs and prevent the soil body 8 producing bubbles inside,
Subsequently with scraper by floating for soil sample surface.When combination type survey dish 6 is installed, internal and external disk is simultaneously placed to soil sample surface and protects
The upper and lower surface holding inner disc 62 and outer disk 61 flushes, and lays sealed polyethylene plastic on the soil body 8 surface to prevent soil sample aqueous
Rate is lost, and applies the weights 2 of 500g on combination type survey dish 6, so that combination type survey dish 6 in each process of the test
The degree of depth burying sagging keeps consistent (about 1.5mm), finally for the outer disk 61 of stable combination type survey dish, and will be solid with screw
Determine frame 5 to be connected with model groove 3 outward flange, and rotary fixing frame 5 is fixed bolt make the outer disk 61 of itself and combination type survey dish
Just contact, the impact that when outer disk 61 is rocked and reduces off-load when can prevent from being further applied load, test is brought by the soil body 8 resilience.
The model groove 3 assembling sample is placed on the platform of triaxial shear equipment 7, places about 24h, make soil sample fully consolidate.
At installation position, the surface displacement sensor 4 of combination type survey dish 6 before loading, and pulling force sensor 1 is connected with combination type survey dish 6.
Starting threephase asynchronous, speed selects correct gear to start drawing according to schedule, gathers the data such as pulling force, displacement simultaneously,
Until inner disc 62 and the soil body 8 separate.In completed test, the liquid limit of test clay 8 used about 23%, plastic limit
About 41%, moisture content in the range of 23%～57%, and the tapped through hole 63 on inner disc 62 opens the situation of 2
Under, available typical result of the test.
Although being described this utility model above in conjunction with figure, but this utility model is not limited to above-mentioned concrete reality
Executing mode, above-mentioned detailed description of the invention is only schematic rather than restrictive, those of ordinary skill in the art
Under enlightenment of the present utility model, in the case of without departing from this utility model objective, it is also possible to make many variations, these
Within belonging to protection of the present utility model.
Claims (4)
1. can eliminate an adhesion tester for pull of vacuum impact, including loading unit and measuring unit；Described loading unit includes threephase asynchronous, triaxial shear equipment (7), model groove (3), combination type survey dish (6), fixed mount (5) and weights (2), described triaxial shear equipment (7) is provided with two support bars, article two, the top of support bar is provided with crossbeam, described model groove (3) is fixed on described triaxial shear equipment (7), and described fixed mount (5) is fixed on described model groove (3)；Described measuring unit includes pull pressure sensor (1) and displacement transducer (4), and institute's displacement sensors (4) is arranged on described combination type survey dish (6)；The upper connecting rod of one pulling force sensor (1) is fixed with the crossbeam of described triaxial shear equipment, for removably connecting between lower link and described combination type survey dish (6) of described pulling force sensor, described weights (2) is placed on described combination type survey dish (6)；Described combination type survey dish (6) includes outer disk (61) and round table-like inner disc (62), described outer disk (61) is provided with inverted cone centre bore (65), described round table-like inner disc (62) is assemblied in described inverted cone centre bore (65), it is characterised in that:
Described inner disc (62) is provided with the tapped through hole (63) of multiple up/down perforation, and each tapped through hole (63) is equipped with a dismountable plug (66).
The adhesion tester of pull of vacuum impact can be eliminated the most according to claim 1, it is characterized in that: the upper surface of described inner disc (62) is provided with screwed hole (64), the end of described pulling force sensor lower link is provided with external screw thread, for threadeding between described pulling force sensor lower link with described inner disc (62).
The adhesion tester of pull of vacuum impact can be eliminated the most according to claim 1, it is characterised in that: described tapped through hole (63) is axially in parallel with described inner disc (62).
The adhesion tester of pull of vacuum impact can be eliminated the most according to claim 1, it is characterised in that: described plug (66) uses screw-rod structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620069636.6U CN205808897U (en) | 2016-01-25 | 2016-01-25 | A kind of adhesion tester that can eliminate pull of vacuum impact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620069636.6U CN205808897U (en) | 2016-01-25 | 2016-01-25 | A kind of adhesion tester that can eliminate pull of vacuum impact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205808897U true CN205808897U (en) | 2016-12-14 |
Family
ID=58143760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620069636.6U Expired - Fee Related CN205808897U (en) | 2016-01-25 | 2016-01-25 | A kind of adhesion tester that can eliminate pull of vacuum impact |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663319A (en) * | 2018-07-25 | 2018-10-16 | 南京林业大学 | Soil is pushed in one kind and the adjustable clay of contact area sticks force test device and test method |
| CN109085117A (en) * | 2018-07-25 | 2018-12-25 | 南京林业大学 | A kind of area controllably and pushes the cover-plate type loaded and sticks force test device and test method |
| CN110632119A (en) * | 2019-10-11 | 2019-12-31 | 南京林业大学 | Test device and test method for measuring adhesion between soil body and metal interface under influence of temperature rise of soil body |
| CN110631991A (en) * | 2019-10-11 | 2019-12-31 | 南京林业大学 | Test device for forming high-strength mud cake through wedging loading and adhesion force measuring method |
| CN115680620A (en) * | 2022-09-08 | 2023-02-03 | 中国石油大学(华东) | Device for testing plugging capability of jelly plugging agent and method for evaluating plugging capability |
-
2016
- 2016-01-25 CN CN201620069636.6U patent/CN205808897U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108663319A (en) * | 2018-07-25 | 2018-10-16 | 南京林业大学 | Soil is pushed in one kind and the adjustable clay of contact area sticks force test device and test method |
| CN109085117A (en) * | 2018-07-25 | 2018-12-25 | 南京林业大学 | A kind of area controllably and pushes the cover-plate type loaded and sticks force test device and test method |
| CN110632119A (en) * | 2019-10-11 | 2019-12-31 | 南京林业大学 | Test device and test method for measuring adhesion between soil body and metal interface under influence of temperature rise of soil body |
| CN110631991A (en) * | 2019-10-11 | 2019-12-31 | 南京林业大学 | Test device for forming high-strength mud cake through wedging loading and adhesion force measuring method |
| CN110631991B (en) * | 2019-10-11 | 2024-06-04 | 南京林业大学 | Testing device for forming high-strength mud cake by wedging type loading and adhesion measuring method |
| CN110632119B (en) * | 2019-10-11 | 2024-06-07 | 南京林业大学 | Test device and test method for simulating adhesion force measurement between soil body and metal interface under influence of soil body temperature rise |
| CN115680620A (en) * | 2022-09-08 | 2023-02-03 | 中国石油大学(华东) | Device for testing plugging capability of jelly plugging agent and method for evaluating plugging capability |
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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: 20161214 Termination date: 20180125 |