CN109297824A - The geosynthetics staight scissors drawing one test device of dynamic load can be applied - Google Patents
The geosynthetics staight scissors drawing one test device of dynamic load can be applied Download PDFInfo
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- CN109297824A CN109297824A CN201811310485.9A CN201811310485A CN109297824A CN 109297824 A CN109297824 A CN 109297824A CN 201811310485 A CN201811310485 A CN 201811310485A CN 109297824 A CN109297824 A CN 109297824A
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- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 238000002474 experimental method Methods 0.000 claims abstract description 27
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 11
- 230000003068 static effect Effects 0.000 claims abstract description 11
- 238000006073 displacement reaction Methods 0.000 claims description 20
- 238000007586 pull-out test Methods 0.000 claims description 20
- 238000010008 shearing Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 6
- 230000002787 reinforcement Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000003447 ipsilateral effect Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 5
- 239000004576 sand Substances 0.000 description 18
- 239000002689 soil Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 239000000945 filler Substances 0.000 description 3
- 229940099259 vaseline Drugs 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
-
- 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
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides the geosynthetics staight scissors drawing one test devices that one kind can apply dynamic load, it includes the pedestal with horizontal shifting platform, and the experiment casing set on horizontal shifting platform, it further include the horizontal addload mechanism and normal direction loading mechanism of exportable static load or dynamic load in being provided with geosynthetics sample in experiment casing；And the control system with computer processing unit and data monitoring terminal.Originally it can apply the geosynthetics staight scissors drawing one test device of dynamic load, by applying static load or dynamic load to geosynthetics sample, and then it can be during the test according to requiring to be selected, and operating condition of the geosynthetics sample in Practical Project use process can be simulated during the test when applying dynamic load, therefore the test data measured also more really reflects the data of geosynthetics in practical projects, improves test effect.
Description
Technical field
The present invention relates to soil test equipment technical field, in particular to a kind of geosynthetics that can apply dynamic load
Staight scissors drawing one test device.
Background technique
Geosynthetics have intensity it is high, it is flexible it is big, durability is strong, low cost, construction are convenient and can be with soil body shape
The advantages that increasing soil strength at complex structure body, has been widely used in engineering, being related to engineering field includes geotechnical engineering, water
Sharp engineering, environmental project, traffic engineering, municipal works and engineering etc. of reclaiming fields from the sea.In engineering, by geosynthetics
It is set to the inside of the soil body, surface or is combined with other materials and structure, reach anti-filter, draining, antiseepage, reinforcement and protection etc.
Function and effect, so that the problems such as related stable structure, deformation and antiseepage drain in engineering is efficiently solved, so that engineering knot
Structure more safety economy.
For the composite construction of geosynthetics and soil body composition, the skill of structure monolithic stability can be directly affected
Art index is exactly the interface friction loss characteristic between geosynthetics and the soil body, it is therefore desirable to staight scissors and drawing examination are carried out to it
It tests.When carrying out staight scissors and pull-out test, geosynthetics should be simulated as far as possible in the actual conditions of engineering, wherein staight scissors
Test is the mode simulated side between geosynthetics and the soil body and relative displacement occurs, bring it about it is shear-deformable, with this
To measure the shearing strength of ceramic-metal bond；Pull-out test be simulation it is embedding with the soil body in geosynthetics upper and lower two sides all
The process gradually extracted when stress, can measure the reinforcement anchoring strength of geosynthetics or the size of drawing resistance and its
Changing rule.
Although experimental provision in the prior art can carry out drawing or direct shear test mostly, generally by two sets
Individual loading system is tested, i.e., loading system etc. used is all provided separately, therefore causes structure whole more
Complicated huge, utilization rate of equipment and installations is low and occupied space is larger, meanwhile, at present the testing equipment of geosynthetics staight scissors drawing into
It is nearly all to be carried out under the action of dead load, with the action effect of geosynthetics in practical projects when row test
Difference is larger, i.e., existing static load test result can not the data of accurate response geosynthetics in practical projects.
Summary of the invention
In view of this, the present invention is directed to propose a kind of geosynthetics staight scissors drawing that can apply dynamic load is integrally tested
Device, with the effect by simulation geosynthetics in practical projects, and then more really reaction geosynthetics exists
Data in Practical Project.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of geosynthetics staight scissors drawing one test device applying dynamic load, including it is flat with moving horizontally
The pedestal of platform, and the experiment casing being detachably connected with the horizontal shifting platform, in be provided in the experiment casing by
The embedding geosynthetics sample of filler, further includes:
Horizontal addload mechanism, on the pedestal of the experiment casing side, and exportable horizontal linear power, to soil
Geosynthetics sample carries out staight scissors or pull-out test, and the horizontal linear power can be static load or dynamic load；
Normal direction loading mechanism has the bearing plate positioned at the top of the experiment casing, tries in the geosynthetics
When sample staight scissors or pull-out test, the bearing plate is pressed into the experiment casing, with can be to the geosynthetics sample
Apply normal direction straight line power, the normal direction straight line power can be static load or dynamic load；
Control system, including computer processing unit and multiple data prisons being electrically connected with the computer processing unit
Survey terminal.
Further, the normal direction loading mechanism includes top beam, and the first hydraulic cylinder being fixed on the top beam, institute
Bearing plate is stated on the First piston bar free end of the first hydraulic cylinder, the data monitoring terminal includes being set to described the
First pressure sensor and the first displacement sensor on one piston rod.
Further, it is connect using bulb ball-and-socket with the First piston bar free end in being fixed on the bearing plate
Disk.
Further, the horizontal addload mechanism includes being located at the second ipsilateral liquid of horizontal shifting platform with the blocking portion
Cylinder pressure, and in being fixed with pushing block on the second piston cylinder of the second hydraulic cylinder, it is arranged between the pushing block and the pedestal
There is the support portion being supported to the pushing block, the data monitoring terminal further includes second on the second piston cylinder
Pressure sensor and second displacement sensor.
Further, in being provided with multiple reinforcement ribs on the experiment casing outer peripheral surface.
Further, the experiment casing includes drawing cabinet and staight scissors cabinet, and the drawing cabinet and staight scissors cabinet are selected
One is fixed on the horizontal shifting platform.
Further, the staight scissors cabinet includes the staight scissors lower box connected with horizontal shifting platform composition, and
The staight scissors upper box being stacked on staight scissors lower box top is provided on the staight scissors lower box to geosynthetics
The staight scissors fixture that sample end is fixed；When carrying out direct shear test, the pushing block carries out pushing tow to the staight scissors lower box,
And in being provided with the shearing mandril pushed up counter to staight scissors upper box on the pedestal.
Further, the drawing cabinet includes box-like body, and is provided in the box-like body two opposite sides for institute
The seam excessively that geosynthetics sample both ends are pierced by is stated to close geotechnique in being fixed on the pushing block when carrying out pull-out test
The drawing fixture being attached at material sample one end；The data monitoring terminal further includes relative to the drawing fixture in institute
State drawing cabinet the other side setting, with to geosynthetics sample carry out displacement detecting multiple third displacement sensings
Device.
Further, the staight scissors fixture and the drawing fixture respectively include clamp plate and it is described be set to it is described fixed
The upper surface of the dynamic clamping plate of clamping plate side, the lower surface of the dynamic clamping plate and the clamp plate is in that sinusoidal waveform extends respectively.
Further, the Loaded contact analysis of the dynamic load be sine wave, rectangular wave, triangular wave or any two or wantonly two
Kind or more combination.
Compared with the existing technology, present invention has the advantage that
The geosynthetics staight scissors drawing one test device of the present invention for applying dynamic load, by pedestal
Upper setting horizontal shifting platform, and by setting horizontal addload mechanism and normal direction loading mechanism, and then staight scissors examination can be convenient for
It tests or pull-out test, and on the one hand normal direction loading mechanism can be convenient for load load by setting bearing plate, on the other hand
It can be operated convenient for being compacted sand when loading sand into experiment casing convenient for staff, while making water
Flat loading mechanism and normal direction loading mechanism can apply static load or dynamic load respectively, and then can be during the test according to examination
It tests requirement to be selected, and geosynthetics sample can be simulated during the test in Practical Project when applying dynamic load
Operating condition in use process, therefore the test data measured also more really reacts the number of geosynthetics in practical projects
According to.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the geosynthetics staight scissors drawing one test device for applying dynamic load described in the embodiment of the present invention
Carry out structural schematic diagram when pull-out test；
Fig. 2 is the structural schematic diagram that disk described in the present embodiment is connect with piston rod；
Top beam described in Fig. 3 the present embodiment and beam connecting structure schematic diagram；
Fig. 4 is the structural schematic diagram at pushing block described in the embodiment of the present invention；
Fig. 5 is the structural schematic diagram at pedestal described in the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of staight scissors cabinet described in the embodiment of the present invention；
Fig. 7 is the portion A partial enlarged view in Fig. 6；
Staight scissors fixture cross-sectional view described in Fig. 8 embodiment of the present invention；
Fig. 9 is sinusoidal wave shape schematic diagram on dynamic clamping plate described in the embodiment of the present invention and clamp plate；
Figure 10 is shearing push rod structure schematic diagram described in the embodiment of the present invention；
Description of symbols:
1- pedestal, 2- linear guide, 3- horizontal shifting platform, 4- mounting groove, 5- controller, 6- mounting blocks, 7- stop
Bar, 8- baffle, 9- top beam, 10- first hydraulic cylinder, 1001- First piston bar, 11- bearing plate, 12- disk, 1201- ball-and-socket,
1202- bulb, 1203- limit plate, the first guide upright post of 1301-, the upper guide rod of 1302-, guide cylinder under 1303-, 14- crossbeam,
15- second hydraulic cylinder, 1501- second piston bar, 16- pushing block, 17- support rod, 18- pedestal, 19- drawing cabinet, 20- staight scissors
Cabinet, 2001- staight scissors lower box, 2002- staight scissors upper box, 21- geosynthetics sample, 22- clamp plate, 2301- first
Clamping screw, the second clamping screw of 2302-, 2303- spring, 24- move clamping plate, 25- connecting plate, 2501- strip-shaped hole, 26- mandril
Ontology, 27- stiffener plate, 28- second pressure sensor, 29- second displacement sensor, 30- first pressure sensor, 31-
Computer processing unit, 32- cross seam, 33- drawing fixture, 34- third displacement sensor, the first L template of 35-, 36- staight scissors folder
Tool, 37- the second L-type plate, 38- reinforce rib.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
The present embodiment is related to a kind of geosynthetics staight scissors drawing one test device that can apply dynamic load comprising
Pedestal with horizontal shifting platform, and the experiment casing being detachably connected with the horizontal shifting platform, in the test
The geosynthetics sample embedding by filler is provided in cabinet.This can apply the geosynthetics staight scissors drawing of dynamic load
Integrated test device further includes on one wing base of experiment casing and exportable horizontal linear power is to geosynthetics
Sample carries out the horizontal addload mechanism of staight scissors or pull-out test；The normal direction of bearing plate with the top for being located at the experiment casing
Loading mechanism, and in geosynthetics sample staight scissors or pull-out test, the bearing plate is pressed into the experiment casing,
Normal direction straight line power can be applied to the geosynthetics sample；And there is computer processing unit and multiple data to supervise
The control system of terminal is surveyed, and each data monitoring terminal is electrically connected with the computer processing unit；Wherein horizontal linear power
It can be static load or dynamic load with normal direction straight line power.
Originally the geosynthetics staight scissors drawing one test device that can apply dynamic load, by trying geosynthetics
Sample applies static load or dynamic load, and then can be selected during the test according to test requirements document, and when application dynamic
Operating condition of the geosynthetics sample in Practical Project use process can be simulated when load during the test, therefore measure
Test data also more really reacts the data of geosynthetics in practical projects, improves test effect.
The geosynthetics staight scissors drawing one for applying dynamic load based on design philosophy as above, in the present embodiment
A kind of exemplary structure of test device can be as shown in Figure 1, wherein pedestal 1 be cuboid plate body structure, and lower surface is fixed on one
On basal plane, being arranged side by side along length surface direction thereon has two linear guides 2, and above-mentioned horizontal shifting platform 3 is because being set to two
It can be slided along 1 length direction level of pedestal in linear guide 2, linear guide 2 uses existing structure in the present embodiment,
Details are not described herein, while for the ease of the arrangement of shearing mandril and third displacement sensor 34 described below, this implementation
It is also formed with a plurality of mounting groove 4 at 1 upper surface middle part of pedestal in example, and is provided in each mounting groove 4 not shown in the figure
Connecting hole.
In above-mentioned structure, for ease of description, by horizontal shifting platform 3 and experiment casing close to horizontal in the present embodiment
One end of loading mechanism is respectively defined as front end, and the other end is respectively defined as rear end.In the present embodiment move horizontally it is flat
It is also fixed with the blocking portion stopped to the sliding of horizontal shifting platform 3 on pedestal 1 at 3 front end of platform, is stopped by setting
Portion on the one hand can be convenient for carrying out initial alignment for horizontal shifting platform 3, on the other hand can also be to level when carrying out pull-out test
Mobile platform 3 is stopped, and guarantee test carries out.Blocking portion is specifically included in the present embodiment is connected via welding or bolt assembly
In on pedestal 1 mounting blocks 6 and threaded one end be connected to the countercheck rod 7 on the mounting blocks 6, the other end of the countercheck rod 7 is then
It constitutes and is contacted with 3 front end of horizontal shifting platform or baffle 8 described below, so that realization is to horizontal shifting platform 3
Stop positioning, and by being detachably connected countercheck rod 7 and mounting blocks 6 so as to being convenient for when countercheck rod 7 influences test progress
Countercheck rod 7 is removed.In addition, the intracorporal sand of chamber falls and influences the sliding of support wheel described below in order to prevent,
Baffle 8 is provided in the present embodiment on the front end of horizontal shifting platform 3, by setting baffle 8 so as to falling on level
Sand on mobile platform 3, which is formed, to be stopped, and prevents sand from continuing to fall on pedestal 1.
Normal direction loading mechanism includes top beam 9 in the present embodiment, and is fixed on the top beam 9 and via not shown in the figure
The first hydraulic cylinder 10 that hydraulic pipeline is connected to oil pump station, above-mentioned bearing plate 11 are then lived set on the first of the first hydraulic cylinder 10
On the free end of stopper rod 1001, the decline of bearing plate 11 when First piston bar 1001 is stretched out and be pressed into in experiment casing, when the
Bearing plate 11 rises and is detached from experiment casing when one piston rod 1001 recycles, while bending deformation occurs in order to reduce bearing plate 11
The probability of shape is fixed on bearing plate 11 and 1001 free end of First piston bar as shown in Fig. 1 combination Fig. 2, in the present embodiment
The disk 12 connected using bulb ball-and-socket, and the diameter of the disk 12 is greater than the diameter of First piston bar 1001.On specific structure,
Disk 12 is connected by welding or bolt assembly and bearing plate 11 in the present embodiment, and in side of the disk 12 far from bearing plate 11
It is formed with ball-and-socket 1201 on end face, and is formed with the ball for being adapted setting with ball-and-socket 1201 on 1001 free end of First piston bar
First 1202, in order to reduce the amplitude of fluctuation of disk 12, also in bulb 1202 close to the one of First piston bar 1001 in the present embodiment
It is formed with limit plate 1203 at end, is abutted so that 1201 outer wall of ball-and-socket can be formed in switching process with limit plate 1203, from
And form the blocking to overturning.
On specific structure, for the ease of the arrangement of top beam 9, as shown in Figure 1, at 3 liang of horizontal shifting platform in the present embodiment
The first guide upright post 1301 extended along the vertical direction is respectively fixedly connected on the pedestal 1 of side, the both ends of top beam 9 are arranged in two respectively
On a first guide upright post 1301, and Hydraulic Clamping Mechanism is set in top beam 9, which can be used for leading to first
It is clamped to column 1301, prevents top beam 9 from going up and down during the work time along the first guide upright post 1301, the Hydraulic Clamping Mechanism
For the prior art, details are not described herein, while 1 side of pedestal being provided with the controller 5 of control Hydraulic Clamping Mechanism.
Certainly, top beam 9 directly can also be fixed on by the first guide upright post by bolt assembly or welding in the present embodiment
On 1301, without the use of Hydraulic Clamping Mechanism.Stability when in order to guarantee that First piston bar 1001 works, in the present embodiment
The medium position of First piston bar 1001 is also fixed with a crossbeam 14, and the both ends of the crossbeam 14 are then oriented to and slide on above-mentioned two
On a first guide upright post 1301.Meanwhile in order to further increase the stability of structure, as shown in connection with fig. 3 by Fig. 1, this implementation
It is also respectively provided with the second guide upright post on the outside of two the first guide upright posts 1301 in example, which includes top
The upper guide rod 1302 that end is connected with top beam 9, and the lower guide cylinder 1303 being fixed on ground basal plane, 1302 bottom of guide rod on this
End guiding slides in lower guide cylinder 1303, to realize the guiding gone up and down to top beam 9.
Horizontal addload mechanism includes being located at the second ipsilateral liquid of horizontal shifting platform 3 with above-mentioned blocking portion in the present embodiment
Cylinder pressure 15, and pushing block 16 is fixed in the second piston bar of second hydraulic cylinder 15 1501, i.e., pass through pushing block 16 in the present embodiment
Apply horizontal linear power.For the ease of the arrangement of pushing block 16 and drawing fixture described below, as shown in connection with fig. 4 by Fig. 1, this
It is fixed with the first L-type plate 35 in 1501 free end of second piston bar in embodiment, and pushing block 16 is fixed on the first L-type plate 35
Lower surface on, and protrude from the first L-type plate 35 outside.While in order to guarantee that drawing fixture 33 and narrow slit described below are high
Spend it is always consistent, and in order to reduce test during frictional force and ensure test accuracy, such as Fig. 4 combination Fig. 5 institute
Show, be provided with the support portion being supported to pushing block 16 in the present embodiment between pushing block 16 and pedestal 1, which includes top
End with pushing block 16 be connected support rod 17, and on 17 bottom end of support rod and with idler wheel pedestal 18, the pedestal 18
It can then walk on pedestal 1 via idler wheel.
In above-mentioned structure, data monitoring terminal includes the first pressure in First piston bar 1001 in the present embodiment
Sensor 30 and the first displacement sensor not shown in the figure, and the second pressure sensing in second piston bar 1501
Device 28 and second displacement sensor 29.When applying load, respectively in first hydraulic cylinder 10 and second hydraulic cylinder in the present embodiment
It is connected with servo valve on 15 fluid pressure line, by inputting Loaded contact analysis, and computer processing unit to computer processing unit
The application that the static load or dynamic load of first hydraulic cylinder 10 and second hydraulic cylinder 15 are then realized by control servo valve, is being tried
According to requiring selection when testing, and when applying dynamic load, the application frequency range of the dynamic load be 0Hz~
50.00Hz, Loaded contact analysis be sine wave, rectangular wave, triangular wave or any two or any two more than combination.
The length-width ratio of geosynthetics sample is 2 in the present embodiment, can largely be reduced using the length-width ratio
The dimensional effect of boundary effect and geosynthetics sample during test, improves the accuracy of test.In the present embodiment
Experiment casing by being made with a thickness of the steel plate of 15mm, and can experiment casing outer peripheral surface setting reinforcement rib 38, with improve examination
The overall stiffness of tryoff body, thus guarantee test cabinet during the test will not there is a situation where side wall evaginations to deform, to examination
It is as small as possible to test resulting influence.The experiment casing includes drawing cabinet 19 and staight scissors cabinet 20 on specific structure, and is drawn
Pull out cabinet 19 and staight scissors cabinet 20 select one to be fixed on horizontal shifting platform 3 (be drawing case on Fig. 1 horizontal shifting platform
Body 19), i.e., staight scissors cabinet 20 is fixed on horizontal shifting platform 3 when carrying out direct shear test, and when carrying out pull-out test
Staight scissors cabinet 20 is removed and drawing cabinet 19 is fixed on horizontal shifting platform 3.
As shown in fig. 6, staight scissors cabinet 20 includes constituting connected staight scissors lower box with horizontal shifting platform 3 in the present embodiment
2001, and the staight scissors upper box 2002 being stacked on 2001 top of staight scissors lower box, the length and width ruler of the staight scissors lower box body 2001
Very little is 800mm × 400mm, and the length and width dimensions of staight scissors upper box 2002 are 600mm × 400mm, by by staight scissors upper box 2002
It is different with 2001 size of staight scissors lower box to cut section test so as to wait staight scissors section test and straighten, and in staight scissors nowel
It is provided with the staight scissors fixture 36 that 21 one end of geosynthetics sample is fixed on 2001 rear end outer wall of body, and for the ease of
The arrangement of staight scissors fixture 36 as shown in connection with fig. 7 by Fig. 6 is provided with the 2nd L on 2001 outer wall of staight scissors lower box in the present embodiment
Template 37, staight scissors fixture 36 are then set on the second L-type plate 37.
It as shown in Figure 7 and Figure 8, include the clamp plate being fixed on the second L-type plate 37 in staight scissors fixture 36 in the present embodiment
22, two the first clamping screws 2301 being spirally connected with the clamp plate 22, and sliding are arranged on the first clamping screw 2301
Two dynamic clamping plates 24, and be spirally connected on dynamic clamping plate 24 above there are three the second clamping screw 2302.To geosynthetics
When sample 21 clamps, 21 end of geosynthetics sample is bent first and forms bending end, is then set bending end
Between dynamic clamping plate 24 and clamp plate 22, then first screw the first clamping screw 2301 so that two dynamic clamping plates 24 simultaneously to
Clamp plate 22 is close, then screw the second clamping screw 2302 again so that inside dynamic clamping plate 24 (in the present embodiment inside
Dynamic clamping plate 24 refers to the dynamic clamping plate mutually close with clamp plate 22) continue to clamp i.e. to clamp plate 22 close to until forming bending end
It can.Meanwhile for the ease of being unclamped to geosynthetics sample 21, in the dynamic clamping plate 24 of clamp plate 22 and inside in the present embodiment
Between be additionally provided with the spring 2303 that clamping plate 24 carries out elastic pushing tow moved to this, and for the ease of the arrangement of spring 2303, this reality
It applies in example and spring 2303 is set on 2301 outer peripheral surface of the first clamping screw, while offering on clamp plate 22 for spring
The annular mounting groove of 2303 installations.By using above-mentioned structure to can avoid 2302 pairs of geotechnique's synthesis materials of the second clamping screw
Material sample 21 causes Assembly Interference, guarantees that geosynthetics sample 21 has longer clamping length.Effect is clamped in order to improve
Fruit, and 21 stress of geosynthetics sample is avoided to concentrate, as shown in figure 9, in the present embodiment under the dynamic clamping plate 24 of inside
It is respectively in the extension of sinusoidal waveform on surface and the upper surface of clamp plate 22, and this moves the wave crest and clamp of 24 upper surface of clamping plate
The corresponding setting of trough of 22 lower surface of plate.
Staight scissors lower box and staight scissors upper box are subjected to assembly installation first when carrying out direct shear test, test procedure is specific
It is as follows:
S1: installation staight scissors lower box 2001, first sliding horizontal shifting platform 3 contact its front end with countercheck rod 7
And initial alignment is completed, then be arranged on staight scissors lower box 2001 four fixing bolts are tightened against on horizontal shifting platform 3,
It is fixed on staight scissors lower box 2001 on horizontal shifting platform 3, and guarantees that the front end of staight scissors lower box 2001 and pushing block 16 are opposite
It answers.
S2: vaseline lubrication is uniformly smeared in staight scissors lower box 2001, (i.e. according to the method for " quality-fixing fabric structure "
Every layer of sand amount for needing to load is determined according to compactness and volume), placement in layers sand (sand is the filler, under
Together) and using 11 compaction in layers sand of bearing plate up to sand and 2001 top flush of staight scissors lower box, and to sand surface
Carry out shaving processing.
S3: geosynthetics sample 21 is laid on sand surface, and using staight scissors fixture to geosynthetics
The bending end of sample 21 is fixed.
S4: staight scissors upper box 2002 is placed, staight scissors upper box 2002 is stacked on staight scissors upper box 2001 (in staight scissors
2001 rear end lower edge of upper box is provided with the gap that setting is adapted with 21 width of geosynthetics sample, the gap and drawing
Pull out on cabinet to cross 32 effect of seam similar, interfered with preventing from being formed when stacking with geosynthetics sample 21), and guarantee straight
The rear end of the rear end and staight scissors upper box 2002 of cutting upper box 2001 aligns, and then continues in staight scissors upper box 2002 point
Layer fills sand until with 2002 top flush of staight scissors upper box, strikes off and accurate compacting filling soil.
S5: on the pedestal 1 of 20 rear end of staight scissors cabinet installation shearing mandril, in direct shear test to staight scissors upper box
2002 form anti-top, guarantee that staight scissors upper box 2002 is not servo-actuated with staight scissors lower box 2001.As shown in Figure 10, the shearing mandril
Including constituting connected and L-shaped connecting plate 25, and the mandril ontology 26, Yi Ji on the connecting plate 25 with pedestal 1
Strip-shaped hole 2501 is provided on connecting plate 25, during installation by the position opposite with the connecting hole in mounting groove 4 of strip-shaped hole 2501, then
Strip-shaped hole 2501 and connecting hole are passed through using bolt assembly, while in order to improve structural strength, being connected in the present embodiment
25 bending place of plate is additionally provided with stiffener plate 27.Mandril ontology 26 is spirally connected with connecting plate 25 and has rocking handle in the present embodiment
Screw, and then mandril ontology 26 can be controlled by screwing and abut and be detached from staight scissors upper box 2002, convenient for operation.
S6: the adjustment decline of bearing plate 11 with the sand on staight scissors upper box 2002 until contact.
S7: the extension elongation of adjustment second piston bar 1501 makes pushing block 16 and 2001 gentle touchdown of staight scissors lower box.
S8: starting direct shear test, and starting second hydraulic cylinder 15 is so that pushing block 16 carries out pushing tow to staight scissors lower box 2001
Straight line power, at this time staight scissors upper box 2002 due to mandril ontology 26 it is anti-top and can not move so that staight scissors upper box
2002 and staight scissors lower box 2001 formed dislocation movement, while open first hydraulic cylinder 10 to sand apply normal direction straight line power it is straight
To off-test.
Different from 20 split type structure of staight scissors cabinet, drawing cabinet 19 is integral formula structure in the present embodiment, the drawing
The length and width dimensions for pulling out cabinet 19 are 600mm × 400mm, and are respectively arranged in 19 front-end and back-end of drawing cabinet and synthesize for geotechnique
What 21 both ends of material sample were pierced by crosses seam 32, when carrying out pull-out test, needs above-mentioned staight scissors cabinet 20 and shearing mandril
It removes, then just can be carried out pull-out test, specific test procedure is as follows:
S1: installation drawing cabinet 19, be arranged on drawing cabinet 19 four fixed screws are tightened against move horizontally it is flat
On platform 3, it is fixed on drawing cabinet 19 on horizontal shifting platform 3.
S2: seam 32 is crossed uniformly to smear vaseline lubrication in down space, according to " quality-volume control in drawing cabinet 19
The method of system ", layering are banketed and are banketed using 11 compaction in layers of bearing plate, up to sand and cross 33 bottom face flushes of seam or summary
32 bottom faces are stitched higher than crossing.
S4: geosynthetics sample 21 is laid on sand surface, and is stitched by crossing for 19 rear and front end of drawing cabinet
32 stretch out, and drawing fixture 33 (drawing fixture 33 and 36 structure phase of staight scissors fixture in the present embodiment are installed on the first L-type plate 35
Together, there is only arrangement posture difference, i.e., the dynamic clamping plate 24 of the drawing fixture 33 and clamp plate 22 are horizontally disposed, drawing fixture 33
Clamp plate 22 be fixed on the first L-type plate 35, and 21 one end of geosynthetics sample also need not when carrying out pull-out test
Bent, as shown in figure 4, details are not described herein), the extension elongation of second piston bar 1501 is adjusted, drawing fixture 33 is enable
Subject to enough connecting with the front end of geosynthetics sample 21, when carrying out pull-out test, data monitoring terminal further includes opposite
It is being arranged in drawing fixture 33 in the other side of drawing cabinet 19, to carry out displacement detecting to geosynthetics sample 21
Multiple third displacement sensors 34, the third displacement sensor 34 can be LVDT displacement sensor, and can by with connecting plate 25
Identical second connecting plate of structure is fixed on mounting groove 4, and the LVDT displacement sensor 34 passes through through vaseline lubricated
The steel strand wires crossed are connect with geosynthetics sample 21, and are connected to rear end and the soil of geosynthetics sample 21
Inside geosynthetics sample 21, then proceedes to the layering in drawing cabinet 19 and banket, strike off and be compacted.
S5: starting pull-out test, starts second hydraulic cylinder 15 so that drawing fixture 33 is to geosynthetics sample 21
It is pulled, while opening first hydraulic cylinder 10 and dynamic load is applied up to off-test, after pull-out test to sand
Multiple third displacement sensors 34 are removed, in order to carry out the direct shear test of next geosynthetics sample.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. one kind can apply the geosynthetics staight scissors drawing one test device of dynamic load, including with horizontal shifting platform
Pedestal, and the experiment casing being detachably connected with the horizontal shifting platform is provided in the experiment casing by filling out
Expect embedding geosynthetics sample, it is characterised in that further include:
Horizontal addload mechanism, on the pedestal of the experiment casing side, and exportable horizontal linear power, to be closed to geotechnique
Staight scissors or pull-out test are carried out at material sample, and the horizontal linear power can be static load or dynamic load；
Normal direction loading mechanism has the bearing plate positioned at the top of the experiment casing, straight in the geosynthetics sample
It cuts or when pull-out test, the bearing plate is pressed into the experiment casing, can apply to the geosynthetics sample
Normal direction straight line power, the normal direction straight line power can be static load or dynamic load；
Control system, it is whole including computer processing unit and multiple data monitorings being electrically connected with the computer processing unit
End.
2. the geosynthetics staight scissors drawing one test device according to claim 1 for applying dynamic load, special
Sign is: the normal direction loading mechanism includes top beam, and the first hydraulic cylinder being fixed on the top beam, and the bearing plate is set
In on the First piston bar free end of the first hydraulic cylinder, the data monitoring terminal includes being set in the First piston bar
First pressure sensor and the first displacement sensor.
3. the geosynthetics staight scissors drawing one test device according to claim 1 for applying dynamic load, special
Sign is: using the disk that connect of bulb ball-and-socket with the First piston bar free end in being fixed on the bearing plate.
4. the geosynthetics staight scissors drawing one test device according to claim 1 for applying dynamic load, special
Sign is: the horizontal addload mechanism include be located at the ipsilateral second hydraulic cylinder of horizontal shifting platform with the blocking portion, and in
It is fixed with pushing block on the second piston cylinder of the second hydraulic cylinder, is provided between the pushing block and the pedestal and is pushed away to described
The support portion that block is supported, the data monitoring terminal further include the second pressure sensor on the second piston cylinder
With second displacement sensor.
5. the geosynthetics staight scissors drawing one test device according to claim 1 for applying dynamic load, special
Sign is: in being provided with multiple reinforcement ribs on the experiment casing outer peripheral surface.
6. the geosynthetics staight scissors drawing one test device according to claim 1 for applying dynamic load, special
Sign is: the experiment casing includes drawing cabinet and staight scissors cabinet, and the drawing cabinet and staight scissors cabinet are selected one and be fixed on
On the horizontal shifting platform.
7. the geosynthetics staight scissors drawing one test device according to claim 6 for applying dynamic load, special
Sign is: the staight scissors cabinet includes constituting connected staight scissors lower box with the horizontal shifting platform, and be stacked in described
Staight scissors upper box on staight scissors lower box top, in be provided on the staight scissors lower box to geosynthetics sample end into
The fixed staight scissors fixture of row；When carrying out direct shear test, the pushing block carries out pushing tow to the staight scissors lower box, and in the bottom
The shearing mandril pushed up counter to staight scissors upper box is provided on seat.
8. the geosynthetics staight scissors drawing one test device according to claim 7 for applying dynamic load, special
Sign is: the drawing cabinet includes box-like body, and is provided in the box-like body two opposite sides for geotechnique's synthesis
What material sample both ends were pierced by, which cross, stitches, when carrying out pull-out test, in being fixed on the pushing block to geosynthetics sample
The drawing fixture that one end is attached；The data monitoring terminal further includes relative to the drawing fixture in the drawing cabinet
The other side setting, with to geosynthetics sample carry out displacement detecting multiple third displacement sensors.
9. the geosynthetics staight scissors drawing one test device according to claim 8 for applying dynamic load, special
Sign is: the staight scissors fixture and the drawing fixture respectively include clamp plate and described set on clamp plate side
The upper surface of dynamic clamping plate, the lower surface of the dynamic clamping plate and the clamp plate is in that sinusoidal waveform extends respectively.
10. the geosynthetics staight scissors drawing according to any one of claim 1 to 9 for applying dynamic load is integrally surveyed
Trial assembly is set, it is characterised in that: the Loaded contact analysis of the dynamic load be sine wave, rectangular wave, triangular wave or any two or wantonly two
Kind or more combination.
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| CN201811310485.9A CN109297824A (en) | 2018-11-06 | 2018-11-06 | The geosynthetics staight scissors drawing one test device of dynamic load can be applied |
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| CN201811310485.9A CN109297824A (en) | 2018-11-06 | 2018-11-06 | The geosynthetics staight scissors drawing one test device of dynamic load can be applied |
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| CN112748023A (en) * | 2020-12-29 | 2021-05-04 | 广西科技大学 | Geosynthetic material temperature control oblique shear test device and test method |
| CN113340747A (en) * | 2021-04-14 | 2021-09-03 | 中煤科工开采研究院有限公司 | Anchor rod shearing testing device and method |
| CN113376008A (en) * | 2021-06-18 | 2021-09-10 | 中工武大设计研究有限公司 | Detection method for shear strength parameter of compacted filling |
| CN114112729A (en) * | 2021-11-09 | 2022-03-01 | 中交天津港湾工程研究院有限公司 | Direct shear drawing test equipment and test method |
| CN115389346A (en) * | 2022-08-30 | 2022-11-25 | 中国水利水电科学研究院 | Closed-loop control system applied to on-site large-scale mechanical test and control method thereof |
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| CN113376008A (en) * | 2021-06-18 | 2021-09-10 | 中工武大设计研究有限公司 | Detection method for shear strength parameter of compacted filling |
| CN114112729A (en) * | 2021-11-09 | 2022-03-01 | 中交天津港湾工程研究院有限公司 | Direct shear drawing test equipment and test method |
| CN115389346A (en) * | 2022-08-30 | 2022-11-25 | 中国水利水电科学研究院 | Closed-loop control system applied to on-site large-scale mechanical test and control method thereof |
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