CN107782635A - Soil in-situ shearing test device - Google Patents
Soil in-situ shearing test device Download PDFInfo
- Publication number
- CN107782635A CN107782635A CN201710879223.3A CN201710879223A CN107782635A CN 107782635 A CN107782635 A CN 107782635A CN 201710879223 A CN201710879223 A CN 201710879223A CN 107782635 A CN107782635 A CN 107782635A
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- Prior art keywords
- vertical
- lever
- sample
- chute
- sliding support
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
Abstract
The invention discloses a kind of free soil in-situ shearing test device of vertical pressure constant deformation, including horizontal shear system, vertical compression system and data collecting system；Horizontal shear system includes motor, base, antiskid anchor pole, connecting screw, shear box；Vertical compression system includes sliding support, chute, counter-force support, reinforcing lever, fine setting counterweight, weights, smooth Elliptical Contacts body and billet；Data collecting system includes horizontal and vertical displacement sensor, level and vertical axial force sensor, vasculum.Amplify counterweight amount of substance using the constant lever of lever leverage in the present invention, in test provide stable vertical load for sample；Coordinate chute using sliding support to ensure vertical compression system and sample synchronizing moving in shear history；Ensure sample vertical load vertical sample top surface all the time using smooth Elliptical Contacts；Using fine setting counterweight energy accuracy controlling vertical pressure size, ensure the accurate implementation of design load.
Description
Technical field
The present invention relates to a kind of Geotechnical Engineering test device, specifically a kind of free soil body of vertical pressure constant deformation is former
Position shearing test device.
Background technology
Live Situ Computation is an indispensable experiment for seeking Rock And Soil actual strength, and shearing specimen size is big, disturbs
Dynamic small, result of the test has more reliability.Conventional direct shear apparatus in situ is mainly by vertical pressure system, horizontal shear system and number
Formed according to acquisition system.Because live specimen size is big, the loading capacity that maintaining the vertical load needed for sample needs (weighs greatly
Several tons), and change vertical load with sample position and must move therewith, workload is big, wastes time and energy.Therefore, how to facilitate
Quickly providing accurate and stable vertical load for experiment process turns into the key issue of live direct shear test.
In the prior art, the vertical load of live Situ Computation is typically provided by preloading or instrument deadweight.Preloading
The preloading process of method is cumbersome, and time length, workload is big, and security is poor；When providing vertical load by instrument deadweight, apparatus frame
It is connected with sample vertical load bringing device, the external load conducted oneself with dignity or be applied on framework by instrument provides counter-force, maintains accordingly
Vertical pressure needed for sample.Above two mode, it is difficult for the vertical pressure that experiment provides precise constant, and shear history
Middle stability is poor；Limit the development of vertical deformation simultaneously in most cases, and sample volume of sample in failure by shear occurs
The important indicator measured is needed during change and experiment, influences final experimental result.China Patent No. CN
201610349059.0 putting forward a kind of free laboratory test vertical pressure lever-loading method of sample vertical deformation, pass through setting
Pressurization cross bar moving up and down ensure that the deformation displacement space vertically loaded to ring specimen during experiment, but should
Method is only applicable to indoor ring shear test；When specimen size is big, and is tested for scene horizontal shear in situ, sample in shear history
This method is unable to reach ideal effect when moving horizontally.
The content of the invention
Goal of the invention：The invention provides a kind of soil in-situ shearing test device, the device can be cut in soil body sample
It is swollen, cut and still provide the vertically vertical load of application and constant magnitude for sample when contracting destroys, and without prejudice to sample vertical deformation.
Technical scheme：A kind of free soil in-situ shearing test device of vertical pressure constant deformation, including horizontal shear
System, vertical compression system and data collecting system；Specifically, horizontal shear system include motor, base, antiskid anchor pole,
Connecting screw, 300mm*300mm square cutouts boxes；Vertical compression system include sliding support, chute, counter-force support, reaction plate,
Reinforce lever, weights, fine setting counterweight, smooth Elliptical Contacts body and billet；Data collecting system includes horizontal and vertical
Axial force sensor, level and vertical displacement sensor and data acquisition device.
Axial force sensor is provided between motor and shear box, is fixedly connected between three by connecting screw, for whole shearing
Device provides horizontal shear force；Antiskid anchor pole squeezes into inside soil body by the preformed hole of base, prevents that device produces water during shearing
Prosposition moves；Smooth Elliptical Contacts body is provided with below reinforcing lever；The smooth contact body is arranged with axial force sensor；Shearing
In box billet is provided with above sample；Reinforcing lever one end is provided with sliding support；The other end of reinforcing lever is provided with counterweight
Counterweight；Horizontal displacement sensors, vertical displacement sensor can measure horizontal and vertical displacement；Data acquisition device and each sensor
It is connected, every data variation in measurement record shear history；Sample is undisturbed, and sample keeps naturally being connected with ground.
In the chute that sliding support can be set on counter-force support in shear history slidably, and chute remains double
To level, ensure that counter-force is all the time vertically downward, while vertical pressure system is synchronous with sample in shear history suffered by sliding support
It is mobile.
Reinforce and contact is set below lever, be provided with smooth oblong groove on contact, the smooth oblong groove
It is in contact with the smooth oblong projection set above axial force sensor, so as to which the pressure for being provided reinforcing lever is applied to examination
Sample, and ensure that vertical pressure applies vertically all the time with Elliptical Contacts.In the case of identical counterweight, bearing uses smooth Elliptical Contacts
Form can effectively reduce the size of maximum (normal) stress suffered by rod member, reduce the requirement to rod member material.
Lever both ends bottom is reinforced to design using camber, it is guarantee lever and sliding support and weights contact point, smooth
Elliptical Contacts point, 3 points in the same horizontal line.
Slip fine setting counterweight is additionally provided between weights and the contact, is experiment for accurate Control experiment load
Setting value；Meanwhile if when experiment process generation anomaly causes vertical axle power meter reading change, it can also be protected by finely tuning counterweight
It is constant to demonstrate,prove vertical pressure.
Operation principle：Before work starts, manual cutting is first carried out to trial zone soil sample to can just be put into shear box size,
Scabble at the top of sample, shear box is placed on sample periphery, install instruments base, and antiskid anchor pole is squeezed into soil from base preformed hole
Internal portion, prevents base from producing horizontal displacement during experiment；Connection spiral shell between fixed horizontal axial force sensor and shear box
Silk, is fixed on motor side by horizontal displacement meter；Billet is installed at the top of sample, axial force sensor is fixed on billet
On, by the smooth oval recess of the contact of vertical pressue device be fixed on reinforcing lever on, and with shear box billet above
Oval projection be in contact.Due to the effect of counter-force support, reinforcing lever one end remains horizontal and highly constant, passes through tune
Whole weights make near vertical pressure to setting load, then adjust fine setting counterweight and be accurate to load setting value；By each sensor
It is connected with vasculum, starts motor, applies the constant horizontal shear force of strain rate to soil body sample, start to test.
In sample shear history, influence of the sliding support elimination of level frictional force to shear stress is coordinated by chute, ensured
Vertical pressure system and sample synchronizing moving in shear history；Because reaction plate and chute remain two-way horizontal, therefore slide
Counter-force suffered by the lever of bearing end is all the time straight down；From smooth elliptic contact surface Force principle, lever is supplied to sample
Pressure is all the time straight down；Because counterweight and fine setting counterweight are by Action of Gravity Field, the size of its power is constant, direction all the time vertically to
Under.Because lever both ends use cambered design, during lever level, lever connects with sliding support contact point, lever and weights
Three points of contact and smooth Elliptical Contacts point in the same horizontal line, when sample produce cut it is swollen, cut contracting etc. vertical deformation when, lever
Tilting, the contact under lever is fixed on lever, and counter-force fulcrum, the application point of counterweight forces are fixed on lever, and three points one
Line.In shear history, loading system is global displacement, therefore length is constant between each fulcrum of lever, and each fulcrum Impact direction is constant,
Therefore the brachium ratio at reinforcing lever both ends remains constant.When counterweight size is constant, understand to connect according to the equilibrium principle of power
Contact also keeps constant to the vertical pressure size of sample in shear box and direction.Simultaneously as whole loading system use can
The lever-loading method of vertical displacement is produced, therefore, sample vertical deformation is unrestricted.
Beneficial effect：A kind of soil in-situ shearing test device provided by the present invention, can be not limit sample vertical
Ensure vertical force vertically application and constant magnitude, and can accurately adjust all the time with Elliptical Contacts in the case of development of deformation
The size of vertical force so that result of the test is more accurate.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the sliding support and sliding groove structure front view of the present invention；
Fig. 3 is the sliding support and sliding groove structure left view of the present invention.
Specific implementation method
As shown in figure 1, a kind of free soil in-situ shearing test device of vertical pressure constant deformation, including horizontal shear
System, vertical compression system and data collecting system；Specifically, horizontal shear system includes motor 1, base 2, antiskid anchor pole
3rd, connecting screw 6,300mm*300mm square cutouts box 7；Vertical compression system includes sliding support 8, counter-force support 9, chute
91st, reaction plate 92, reinforcing lever 10, weights 11, fine setting counterweight 111, contact 13 and billet 15；Data collecting system
Including horizontal axial force sensor 4, horizontal displacement sensors 5, vertical axial force sensor 14, vertical displacement sensor 12 and data
Vasculum 16.Axial force sensor 4 is provided between motor 1 and shear box 7, and the screw 6 that is connected is fixedly connected, for whole shearing
Device provides horizontal shear force, and ensures shear box not run-off the straight in shear history, and sample can only occurred level and vertical side
To displacement；Antiskid anchor pole 3 squeezes into inside soil body by the preformed hole of base 2, prevents that whole device produces horizontal position during shearing
Move；The lower section of reinforcing lever 10 is fixed with contact 13；Contact 13 is arranged with axial force sensor 14, is set below axial force sensor
There is billet 15；Reinforcing lever 10 one end is provided with sliding support 8, and the other end is provided with weights 11；Horizontal displacement sensing
Device 5, vertical displacement sensor 12 can measure horizontal and vertical displacement；Data acquisition device 16 is connected with each sensor, measurement note
Record every data variation in shear history；Sample 17 is undisturbed, and sample keeps naturally being connected with ground.
In order to accurately control vertical pressure, slip fine setting counterweight is additionally provided between weights 11 and the contact 13
111。
Smooth oval-shaped groove is provided with the contact 13 that the lower section of reinforcing lever 10 is set, the oval-shaped groove and axle
The smooth oblong projection that the top of force snesor 14 is set is in contact, and is applied to so as to reinforce the pressure of lever 10 straight down
Sample 17, ensure the vertical force to the application of sample 17 all the time perpendicular to sample top with Elliptical Contacts.
As shown in figure 1, reinforcing the both ends bottom of lever 10 using camber design, ensure reinforcing lever 10 and sliding support 8 and
The contact point of weights 11, smooth Elliptical Contacts point, 3 points in the same horizontal line.
Reinforcing lever 10 one end is provided with sliding support 8, and the two-way horizontal that sliding support 8 can be set on counter-force support 9 is anti-
In chute 91 under power plate 92 slidably, the length of chute 91 is more than the movement locus of sliding support 8 to ensure sliding support 8
All the time in slidably state in chute 91, therefore lever 10 is reinforced during 17 failure by shear of sample and synchronizes movement, lever 10,
Sliding support 8, smooth Elliptical Contacts and weights 11 have collectively constituted constant lever ratio, vertical pressure size and direction not
Become, the free compression system of sample deformation.
As shown in Figures 2 and 3, in order that must reinforce the one end of lever 10 can counter-force support 9 chute 91 in slide and
Unstable or skew will not be caused due to reinforcing the change in location of lever 10, therefore inverted triangle is provided with reinforcing lever 10
The sliding support 8 of shape；The base of sliding support 8 is parallel with horizontal concrete chute 91, a pulley 81 is respectively provided with two base angles, pulley exists
Slided in chute 91；The drift angle of sliding support 8 is fixedly connected in the rotating shaft 82 on reinforcing lever 10.
As shown in figure 3, in order that ensure that the reinforcing stress of lever 10 is put down when the pulley 81 of sliding support 8 slides in chute 91
Do not turn on one's side surely, set two to be parallel to each other and on reinforcing the symmetrical chute of the central axis of lever 10 on counter-force support
91, rotating shaft 82 extends vertically through reinforcing lever 10 two sides, and the both ends of rotating shaft 82 are symmetrical on the reinforcing central axis of lever 10；Two shapes
Shape is identical and the inversion triangle sliding support 8 that is parallel to each other is fixed on the both ends of rotating shaft 82, is symmetrically arranged in reinforcing lever 10
Both sides.
Claims (6)
1. a kind of soil in-situ shearing test device, including provide the motor (1) of horizontal thrust, for measuring horizontal and vertical position
The displacement transducer of shifting, the axial force sensor for measuring vertical pressure and horizontal shear force, the antiskid anchor pole for inserting the soil body
(3), shear box (7) and the vertical pressue device to the interior soil body sample application vertical force of shear box (7), it is characterised in that：Institute
Stating vertical pressue device includes counter-force support (9) and reinforcing lever (10)；Contact (13) is provided with below reinforcing lever (10),
Contact (13) applies vertical force above sample (17), and reinforcing lever (10) one end is provided with sliding support (8)；Sliding support
(8) slided in the chute (91) that can be set on counter-force support (9)；Reinforcing lever (10) other end is provided with weights
(11)。
2. soil in-situ shearing test device according to claim 1, it is characterised in that：Reinforcing lever (10) connects
Slip fine setting counterweight (111) is additionally provided between contact (13) and weights (11).
3. soil in-situ shearing test device according to claim 1, it is characterised in that：The contact (13) is fixed on
Reinforce on lever, its lower surface is provided with smooth oval recess, the smooth oval recess with sample (17) top billet (15)
Smooth oblong projection contacts.
4. soil in-situ shearing test device according to claim 1, it is characterised in that：The sliding support (8) is overall
In del, sliding support (8) base is parallel with horizontal concrete chute (91), and a pulley (81) is respectively provided with two base angles, sliding
Pulley (81) on the base angle of dynamic bearing (8) can slide in chute, and the drift angle of sliding support (8) is fixed on reinforcing lever (10)
Rotating shaft (82) on.
5. soil in-situ shearing test device according to claim 4, it is characterised in that：Chute (91) Parallel Symmetric
Set, two chutes (91) are symmetrical arranged on the central axis of reinforcing lever (10)；The sliding support (8) is symmetricly set in
Lever (10) both sides are reinforced, are slided respectively in two chutes (91).
6. soil in-situ shearing test device according to claim 4, it is characterised in that：The chute (91) is fixed on instead
On power plate (92), counter-force board size is more than chute size, and chute (91) length is more than sliding support (8) movement locus overall length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710879223.3A CN107782635B (en) | 2017-09-26 | 2017-09-26 | Soil body normal position shear test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710879223.3A CN107782635B (en) | 2017-09-26 | 2017-09-26 | Soil body normal position shear test device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107782635A true CN107782635A (en) | 2018-03-09 |
| CN107782635B CN107782635B (en) | 2020-06-16 |
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ID=61433689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710879223.3A Active CN107782635B (en) | 2017-09-26 | 2017-09-26 | Soil body normal position shear test device |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489828A (en) * | 2018-05-22 | 2018-09-04 | 湖南工业大学 | A kind of concrete and soil body interface shearing experimental rig and its test method |
| CN109115611A (en) * | 2018-10-23 | 2019-01-01 | 西南交通大学 | A kind of large-tonnage compression creep test device suitable for high-strength concrete |
| CN109440843A (en) * | 2018-12-24 | 2019-03-08 | 西安建筑科技大学 | A kind of Model Pile laboratory test combined load bringing device and method |
| CN109443988A (en) * | 2018-12-05 | 2019-03-08 | 河海大学 | A kind of test equipment and test method of coarse-grained soil rheological behavior |
| CN109794964A (en) * | 2019-03-08 | 2019-05-24 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | The submissive performance testing device of static state applied to industrial robot |
| CN109932246A (en) * | 2019-04-22 | 2019-06-25 | 桂林电子科技大学 | A kind of geosynthetics press creep test device |
| CN110220804A (en) * | 2019-06-17 | 2019-09-10 | 河南交通职业技术学院 | A kind of pressure-shear test machine |
| CN112378784A (en) * | 2021-01-15 | 2021-02-19 | 西南交通大学 | Portable soil body in-situ shear test device and test method thereof |
| CN112697611A (en) * | 2020-12-07 | 2021-04-23 | 西南交通大学 | Pile-soil interface shear strength test device considering soil body expansion and contraction behaviors and method thereof |
| CN113125220A (en) * | 2021-04-08 | 2021-07-16 | 太原锅炉集团有限公司 | Preparation method of coal slime stress measurement sample for fluidized bed |
| CN113237752A (en) * | 2021-05-08 | 2021-08-10 | 大连理工大学 | Irregular rock creep testing device and using method thereof |
| CN113358509A (en) * | 2021-05-07 | 2021-09-07 | 上海交通大学 | Full-automatic glass surface abrasion resistance testing device and method |
| CN113418497A (en) * | 2021-05-31 | 2021-09-21 | 石家庄铁道大学 | A calibration device for land monitoring equipment |
| CN114414405A (en) * | 2022-01-17 | 2022-04-29 | 中国矿业大学 | Vertical force applying equipment and method for open-pit mine rock in-situ test |
| CN110220804B (en) * | 2019-06-17 | 2024-05-03 | 河南交通职业技术学院 | Pressure shear testing machine |
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| CN108489828A (en) * | 2018-05-22 | 2018-09-04 | 湖南工业大学 | A kind of concrete and soil body interface shearing experimental rig and its test method |
| CN109115611A (en) * | 2018-10-23 | 2019-01-01 | 西南交通大学 | A kind of large-tonnage compression creep test device suitable for high-strength concrete |
| CN109443988A (en) * | 2018-12-05 | 2019-03-08 | 河海大学 | A kind of test equipment and test method of coarse-grained soil rheological behavior |
| CN109443988B (en) * | 2018-12-05 | 2021-02-12 | 河海大学 | Testing instrument and testing method for rheological property of coarse-grained soil |
| CN109440843A (en) * | 2018-12-24 | 2019-03-08 | 西安建筑科技大学 | A kind of Model Pile laboratory test combined load bringing device and method |
| CN109440843B (en) * | 2018-12-24 | 2023-12-15 | 西安建筑科技大学 | Combined load applying device and method for model pile indoor test |
| CN109794964A (en) * | 2019-03-08 | 2019-05-24 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | The submissive performance testing device of static state applied to industrial robot |
| CN109932246B (en) * | 2019-04-22 | 2023-11-03 | 桂林电子科技大学 | Geosynthetic material roof pressure creep test device |
| CN109932246A (en) * | 2019-04-22 | 2019-06-25 | 桂林电子科技大学 | A kind of geosynthetics press creep test device |
| CN110220804A (en) * | 2019-06-17 | 2019-09-10 | 河南交通职业技术学院 | A kind of pressure-shear test machine |
| CN110220804B (en) * | 2019-06-17 | 2024-05-03 | 河南交通职业技术学院 | Pressure shear testing machine |
| CN112697611A (en) * | 2020-12-07 | 2021-04-23 | 西南交通大学 | Pile-soil interface shear strength test device considering soil body expansion and contraction behaviors and method thereof |
| CN112697611B (en) * | 2020-12-07 | 2022-03-25 | 西南交通大学 | Pile-soil interface shear strength test device considering soil body expansion and contraction behaviors and method thereof |
| CN112378784B (en) * | 2021-01-15 | 2021-03-26 | 西南交通大学 | Portable soil body in-situ shear test device and test method thereof |
| CN112378784A (en) * | 2021-01-15 | 2021-02-19 | 西南交通大学 | Portable soil body in-situ shear test device and test method thereof |
| CN113125220A (en) * | 2021-04-08 | 2021-07-16 | 太原锅炉集团有限公司 | Preparation method of coal slime stress measurement sample for fluidized bed |
| CN113358509A (en) * | 2021-05-07 | 2021-09-07 | 上海交通大学 | Full-automatic glass surface abrasion resistance testing device and method |
| CN113237752A (en) * | 2021-05-08 | 2021-08-10 | 大连理工大学 | Irregular rock creep testing device and using method thereof |
| CN113237752B (en) * | 2021-05-08 | 2022-05-27 | 大连理工大学 | Irregular rock creep testing device and using method thereof |
| CN113418497A (en) * | 2021-05-31 | 2021-09-21 | 石家庄铁道大学 | A calibration device for land monitoring equipment |
| CN113418497B (en) * | 2021-05-31 | 2022-10-14 | 石家庄铁道大学 | A calibration device for land monitoring equipment |
| CN114414405A (en) * | 2022-01-17 | 2022-04-29 | 中国矿业大学 | Vertical force applying equipment and method for open-pit mine rock in-situ test |
| CN114414405B (en) * | 2022-01-17 | 2023-12-05 | 中国矿业大学 | Strip mine rock in-situ test vertical force application device and application method |
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