CN108645712A - Geosynthetics tensile test apparatus based on soil medium - Google Patents
Geosynthetics tensile test apparatus based on soil medium Download PDFInfo
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- CN108645712A CN108645712A CN201810387622.2A CN201810387622A CN108645712A CN 108645712 A CN108645712 A CN 108645712A CN 201810387622 A CN201810387622 A CN 201810387622A CN 108645712 A CN108645712 A CN 108645712A
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- 239000002689 soil Substances 0.000 title claims abstract description 132
- 238000009864 tensile test Methods 0.000 title claims abstract description 39
- 238000012360 testing method Methods 0.000 claims abstract description 70
- 238000009434 installation Methods 0.000 claims abstract description 33
- 238000002474 experimental method Methods 0.000 claims abstract description 21
- 239000000945 filler Substances 0.000 claims abstract description 7
- 238000006073 displacement reaction Methods 0.000 claims description 27
- 230000009471 action Effects 0.000 claims description 13
- 230000000694 effects Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 2
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- 241001269238 Data Species 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
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- 230000006835 compression Effects 0.000 description 2
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- 238000011002 quantification Methods 0.000 description 2
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- 230000001429 stepping effect Effects 0.000 description 2
- 229920002994 synthetic fiber Polymers 0.000 description 2
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- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
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- 230000000452 restraining effect Effects 0.000 description 1
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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
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- 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
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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Abstract
The present invention provides a kind of geosynthetics tensile test apparatus based on soil medium, belong to geosynthetics technical field of measurement and test, including two layers or more of host body panel, the console and data collector being connected with host body panel, host body panel includes installation frame, be set on installation frame for holding filler and installing soil sample box, the cross horizontal stretch device and xial feed loading device positioned at four side of soil sample box of test specimen；Console is used to acquire the data information during experiment for setting experiment parameter, data collector.Geosynthetics tensile test apparatus provided by the invention based on soil medium, host body panel can carry out three dimensional taest to the test specimen of the geosynthetics based on soil medium, really reflect geosynthetics deformation performance under soil medium three-dimensional stress constraint, improve test accuracy simultaneously, test efficiency is improved, the technique effect of occupation of land problem is saved.
Description
Technical field
The invention belongs to geosynthetics technical field of measurement and test, are to be related to one kind being based on soil medium more specifically
Geosynthetics tensile test apparatus.
Background technology
With the fast development of economic construction of China, geosynthetics such as TGXG, geomembrane etc. is in engineering structure
In have been more and more widely used, but there is relevant report to point out in recent years：There is wall external drum even in part reinforced earth bulkhead
Unstable phenomenon occurs, more than half is because being deposited when chosen material design value the study found that causing this case by expert investigation
In error.
Currently, parameter value of the geosynthetics in engineering design, analysis calculating and safety evaluation is still with tradition
One directional tensile test result be foundation.Geosynthetics is mostly planar flexible high molecular material, is located inside works
Or many places are in plane stress state when surface, principal stress is closer to biaxial tension stress state, and bidirectional stress often size
It is variant.
Such as application No. is the patent documents of 201019026078.X, disclose geosynthetic biaxial tension creep test
Instrument, above-mentioned testing equipment are to carry out tensile test in air medium.Since in practical engineering application, geotechnique synthesizes material
Material is to play respective action by contacting with each other with surrounding soil, i.e. can be by soil medium lateral spacing wherein being in contact with the soil body
The effect of constraint, native land geosynthetics in air medium institute's ergometry performance in Practical Project geosynthetics
True stress disagrees, this causes to need to use strength reduction factor, reduction coefficient too conference to there is safety when engineering design
Problem, reduction coefficient is too small, and it will cause waste of material, to affect application of the geosynthetics in earth structure
And safety.Geosynthetics in soil except can by soil medium lateral restraining action in addition to, can also be because of buried depth not
Together, and by different Normal stress.
Find that real bearing state of the geosynthetics in practical application is in conjunction with the above analysis：In soil medium
In, it was not only constrained by the lateral spacing in X-Y plane, but also can be in the soil body by effect, that is, geosynthetics of Z-direction Normal stress
By the collective effect under three-dimensional stress constraint in medium, therefore tied obtained by traditional one directional tensile test of carry out in air medium
Fruit cannot reflect the true working condition of geosynthetics and loading characteristic.Therefore, it is necessary to be carried out to existing test equipment
It improves, in the hope of using improved testing equipment measured result that can really reflect, the working condition of geosynthetics and stress are special
Point, to provide reference for engineering design.
In addition, generally in order to eliminate since material character, accidentalia are caused by test result when carrying out laboratory test
Experimental error, therefore general requirement needs to carry out under the same conditions no less than three groups of experiments, then compares again test result
Compared with.And three groups of experiments meet the purpose of equal observation when specific operation, need to test simultaneously.Existing geotechnique's synthesis
Material tensile test equipment, an equipment can only test one group of sample in test and then be tested according to traditional experimental rig
When need to purchase three same instruments, the expense not only generated in this way is relatively high, but also inconvenient, while three instruments take up an area
Problem be also need a problem solving, therefore how under the premise of guarantee test precision to save expense, occupation of land problem also needs
Want us to ponder deeply.
In order to compared with real simulation geosynthetics under soil medium three-dimensional stress constraint deformation performance, while improving examination
Precision is tested, test efficiency is improved, occupation of land problem is saved, therefore proposes a kind of geosynthetics tension test based on soil medium
Device has important actual application value.
Invention content
The purpose of the present invention is to provide a kind of geosynthetics tensile test apparatus based on soil medium, to solve
The technical problem that experimental rig test accuracy existing in the prior art is low, test efficiency is low, inconvenient, space is big.
To achieve the above object, the technical solution adopted by the present invention is：A kind of geotechnique's synthesis based on soil medium is provided
Material tensile test device includes two layers or more of host body panel, the console sum number being connected with the host body panel
According to collector；
The host body panel includes installation frame, is set on the installation frame and is tried for holding filler and installation
The soil sample box of part for the cross horizontal stretch device of specimen test and is located at the soil sample positioned at four side of soil sample box
Xial feed loading device above box；
The cross horizontal stretch device include for clamping test pieces clamping device, be fixed on the installation frame
Linear guides, be arranged on the linear guides the sliding block being fixedly connected with the clamping device, with the clamping device
The lead screw of connection, the pull pressure sensor between the clamping device and the lead screw, the other end company with the lead screw
The retarder that connects, the stepper motor being connect with the retarder, the displacement sensor being arranged on the retarder and for moving
Move the handwheel of the clamping device position；
The xial feed loading device includes installing crossbeam, the column for being set to the installation below the crossbeam both sides, setting
It is placed in the axially loaded oil cylinder installed on crossbeam, the load transducer being set on the axially loaded oil cylinder, is set to
The bearing plate of the axially loaded oil cylinder end contacted with soil sample box upper surface, the displacement being arranged on the bearing plate
Sensor；
The console is used to set rate of extension and the setting xial feed load of the cross horizontal stretch device
The xial feed of device；The data collector is used to acquire horizontal pull and displacement data during experiment, and can be in real time
Display experiment conditional curve.
Further, the soil sample box is located at the center of the host body panel, including lower soil sample box and upper soil sample
Box, the lower soil sample box and the upper soil sample box are the cavity rectangular box of upper and lower opening, and geosynthetics sample is located at
Between the lower soil sample box and the upper soil sample box.
Further, the size of the lower soil sample box and the upper soil sample box is 300mm × 300mm.
Further, the clamping device is four groups, is located at four sides of the soil sample box, is in symmetrical cross
Arrangement, the clamping device include the strap being connect with the sliding block and pass through Bolt dismantling with the strap
The ambulatory splint of formula connection, test specimen are clamped by the ambulatory splint.
Further, the linear guides, sliding block, the lead screw, the retarder, the stepper motor, described
Handwheel, the pull pressure sensor and institute's displacement sensors are four groups.
Further, the installation frame is arranged in cross, the cross horizontal stretch device and the installing frame
Frame is connected.
Further, the host body panel is three groups, and host body panel size described in three groups and structure arrangement are homogeneous
Together, the lower end for being located at the host body panel of lowest part is equipped with several supporting racks, and the xial feed for being located at lower part loads
Device can be fixed on the bottom end of the installation frame by the installation crossbeam.
Further, the sphere of action of the displacement sensor of the cross horizontal stretch device is 50mm-150mm, institute
The sphere of action for stating the displacement sensor of xial feed loading device is 15mm-25mm, the sphere of action of the load transducer
Sphere of action for 30KN-50KN, the pull pressure sensor is 80KN-120KN.
Further, the filler in the soil sample box is the soil body.
Further, the data collector with the displacement sensor of the cross horizontal stretch device, the axis
It is electrically connected, and can will test to the displacement sensor, the load transducer and the pull pressure sensor of load loading device
Data record in the process shows experiment conditional curve on the data acquisition computer on the console.
The advantageous effect of geosynthetics tensile test apparatus provided by the invention based on soil medium is：1) double
More meet force-bearing situation of the geosynthetics in the soil body than traditional one directional tensile test with axially loaded experiment to stretching,
Different horizontal stretch ratio values can be arranged in four groups of stepper motors of cross horizontal stretch device, freely adjusted, flexibly
It grasps；
2) on the basis of realizing biaxial tension, using soil medium constraint in such a way that Normal stress is combined, fully
Stretcher strain situation of the geosynthetics under three-dimensional stress constraint at different buried depth is simulated, while test data is remembered in real time
Quantification and qualification is convenient in record；
3) clamping device slides on linear guides, ensure that geosynthetics sample stress is equal when horizontal direction stretches
It is even, reduce test error, the drawing force Pass Test specification of application, test data accuracy rate height；
4) soil sample box size increased in size on the basis of meeting code requirement is realizing the same of soil medium effect of contraction
When, the influence of equipment boundary effect and specimen size effect can be reduced；
5) horizontal force that can apply is larger, allows the deflection of material larger, and the xial feed of application is larger, to fully
Test the performance of geosynthetics deformation；
6) three layers of host body panel are arranged, it is compact-sized, it can test, can also test respectively simultaneously, freedom and flexibility improve
Test efficiency solves the problems, such as equipment occupation of land, meets the requirement of test accuracy.
Description of the drawings
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description be only the present invention some
Embodiment for those of ordinary skill in the art without having to pay creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is that the structure of the geosynthetics tensile test apparatus provided in an embodiment of the present invention based on soil medium is shown
It is intended to；
Fig. 2 is the vertical view of the geosynthetics tensile test apparatus provided in an embodiment of the present invention based on soil medium
Figure；
Fig. 3 is the console of the geosynthetics tensile test apparatus provided in an embodiment of the present invention based on soil medium
Structural schematic diagram.
Wherein, each reference numeral in figure：1- host body panels；11- installation frames；12- soil sample boxes；Soil sample box under 121-；
The upper soil sample boxes of 122-；13- cross horizontal stretch devices；131- clamping devices；1311- straps；1312- bolts；1313-
Ambulatory splint；132- linear guides；133- sliding blocks；134- lead screws；135- pull pressure sensor；136- retarders；137- steppings
Motor；138- displacement sensors；139- handwheels；14- xial feed loading devices；141- installs crossbeam；142- columns；143- axis
To load cylinder；144- load transducers；145- bearing plates；146- displacement sensors；2- consoles；3- supporting racks.
Specific implementation mode
In order to make technical problems, technical solutions and advantages to be solved be more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
It should be noted that when element is referred to as " being fixed on " or " being set to " another element, it can be directly another
On one element or it is connected on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on ... shown in the drawings or position are closed
System, is merely for convenience of description of the present invention and simplification of the description, not indicating or implying the indicated device or element must have
Specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, " multiple ", " several " be meant that two or
Two or more, unless otherwise specifically defined.
Also referring to Fig. 1 to Fig. 3, the now geosynthetics tension test based on soil medium to provided by the invention
Device illustrates.The geosynthetics tensile test apparatus based on soil medium, includes two layers or more of mainframe
Platform 1, the console 2 and data collector being connected with the host body panel 1；
The host body panel 1 include installation frame 11, be set on the installation frame 11 for hold filler and
The soil sample box 12 of test specimen is installed, positioned at 12 4 side of soil sample box for the cross horizontal stretch device 13 of specimen test and
Xial feed loading device 14 above the soil sample box 12；
The cross horizontal stretch device 13 include for clamping test pieces clamping device 131, be fixed on the installation
Linear guides 132 on frame, the sliding block being fixedly connected with the clamping device 131 being arranged on the linear guides 132
133, the lead screw 134 being connect with the clamping device 131, the tension and compression between the clamping device 131 and the lead screw 134
Force snesor 135, the retarder 136 being connect with the other end of the lead screw 134, the stepping being connect with the retarder 136 electricity
Machine 137, the displacement sensor 138 being arranged on the retarder 136 and the handwheel for moving 131 position of the clamping device
139；
The xial feed loading device 14 includes installation crossbeam 141, is set to 141 lower section both sides of the installation crossbeam
Column 142, is set on the axially loaded oil cylinder 143 the axially loaded oil cylinder 143 being set on the installation crossbeam 141
Load transducer 144, be set to the pressure-bearing contacted with 12 upper surface of soil sample box of 143 end of axially loaded oil cylinder
Plate 145, the displacement sensor 146 being arranged on the bearing plate 145；
The console 2 is used to set the rate of extension of the cross horizontal stretch device 13 and setting xial feed adds
Carry set 14 xial feed；The data collector is used to acquire horizontal pull and displacement data during experiment, and energy
Real-time display tests conditional curve.
Geosynthetics tensile test apparatus provided by the invention based on soil medium, compared with prior art, if
Three layers of host body panel 1 are set, three groups of experiments can be carried out at the same time to geosynthetics, improve test accuracy, reduce examination
Error is tested, and each layer of host body panel 1 includes cross horizontal stretch device 13 and xial feed loading device 14, it can
The three-dimensional experiment of test specimen progress to geosynthetics, the three V dimensional synthetic material tension test based on soil medium, very
Geosynthetics deformation performance under soil medium three-dimensional stress constraint is reflected in fact, while improving test accuracy, improves examination
Efficiency is tested, the technique effect of occupation of land problem is saved.
The console 2 that every group of host body panel 1 acquires calculator with data collector and equipped with data is connect,
When carrying out the horizontal stretch experiment of geosynthetics, pass through four groups of displacement sensors 138 and four groups of 135 institutes of pull pressure sensor
Collected data information can be timely transferred on data acquisition computer, and can draw stress according to the tensile stress of application
Strain curve, in the display screen display of data acquisition computer.Four groups of stepper motors can also be controlled by console 2
Different driving forces is arranged in 137 driving force, can obtain different test datas, repetition test several times, or in three groups of mainframes
It is tested simultaneously on platform 1, obtains three groups of test datas, rationally to judge the true of the geosynthetics based on soil medium
Characteristic curve.
Host body panel 1 divides for upper, middle and lower-ranking, and three platforms are about the symmetrical square frame structure of test specimen, often
Layer platform size and structure arrangement are identical, and 132 equal length of linear guides on three layers of platform takes full advantage of test space,
Three groups of experiments can be carried out at the same time, are not interfere with each other, three layers of host body panel 1 form the square frame structure being overlapped up and down.
Further, also referring to Fig. 1 to Fig. 3, as geotechnique's synthesis material provided by the invention based on soil medium
Expect that a kind of specific implementation mode of tensile test apparatus, the soil sample box 12 are located at the center of the host body panel 1, wraps
Lower soil sample box 121 and upper soil sample box 122 are included, the lower soil sample box 121 and the upper soil sample box 122 are the cavity of upper and lower opening
Rectangular box, geosynthetics sample is between the lower soil sample box 121 and the upper soil sample box 122.The bearing plate
145 sectional dimension for being dimensioned slightly smaller than soil sample box 12, lower soil sample box 121 and upper soil sample box 122 are equal in magnitude, have out up and down
Mouthful, it is loaded with soil sample, geosynthetics meets the simulation soil body and be situated between lower soil sample box 121 and upper soil sample box 122
The tension test of the geosynthetics of matter.
Further, also referring to Fig. 1 to Fig. 3, as geotechnique's synthesis material provided by the invention based on soil medium
Expect that a kind of specific implementation mode of tensile test apparatus, the size of the lower soil sample box 121 and the upper soil sample box 122 are
300mm×300mm.The soil medium range size that the size of soil sample box 12 can be applied according to actual geosynthetics,
After reducing certain proportion, the size of the soil sample box 12 of calculating simulation.
Further, also referring to Fig. 1 to Fig. 3, as geotechnique's synthesis material provided by the invention based on soil medium
Expect that a kind of specific implementation mode of tensile test apparatus, the clamping device 131 are four groups, is located at the soil sample box 12
Four sides are in symmetrical cross arrangement, and the clamping device 131 includes the strap being connect with the sliding block 133
1311 and the ambulatory splint 1313 that is detachably connected with by bolt 1312 with the strap 1311, test specimen pass through the activity
Clamping plate 1313 is clamped.The bolt 1312 is three, and strap 1311 can slide on linear guides 132, ambulatory splint
1313 be to clamp geosynthetics, by three bolts 1312 by ambulatory splint 1313 be fixed on strap 1311 it
On, the operation of bolt 1312 is more flexible, and dismounting is smooth.
Further, also referring to Fig. 1 to Fig. 3, as geotechnique's synthesis material provided by the invention based on soil medium
Expect a kind of specific implementation mode of tensile test apparatus, it is the linear guides 132, the sliding block 133, the lead screw 134, described
Retarder 136, the stepper motor 137, the handwheel 139, the pull pressure sensor 135 and institute's displacement sensors 138
It is four groups.Tension test can be done on the four direction of geosynthetics by realizing, and feasible simulation is based on soil medium
Geosynthetics experiment.
Further, also referring to Fig. 1 to Fig. 3, as geotechnique's synthesis material provided by the invention based on soil medium
Expect that a kind of specific implementation mode of tensile test apparatus, the installation frame 11 arrange that the cross level is drawn in cross
Device 13 is stretched to be connected with the installation frame 11.Installation frame 11 is three-decker, is cross arrangement, cross water
Flat stretching device 13 is fixed to be tested with the horizontal stretch for thereon, mainly doing geosynthetics；Xial feed loading device 14
In the surface of installation frame 11, the axially loaded experiment of geosynthetics is mainly done.
Further, also referring to Fig. 1 to Fig. 3, as geotechnique's synthesis material provided by the invention based on soil medium
Expect a kind of specific implementation mode of tensile test apparatus, the host body panel 1 is three groups, and host body panel 1 described in three groups
Size and structure arrange all same, and the lower end for being located at the host body panel 1 of lowest part is equipped with several supporting racks 3, under being located at
The xial feed loading device 14 in portion can be fixed on the bottom end of the installation frame 11 by the installation crossbeam 3.Three
Layer arrangement is compact-sized, easy to operate, improves test efficiency, has not only saved fund, occupation of land problem but also has met test accuracy
It is required that.It may be set to be four layers or more layers, preferably three layers.The number of plies is more, and test data is more, and test result is more
Accurately, more meet the triaxiality strain research of the three V dimensional synthetic material based on soil medium.
Further, also referring to Fig. 1 to Fig. 3, as geotechnique's synthesis material provided by the invention based on soil medium
Expect a kind of specific implementation mode of tensile test apparatus, the work of the displacement sensor 138 of the cross horizontal stretch device 13
Sphere of action with ranging from 50mm-150mm, the displacement sensor 146 of the xial feed loading device 14 is 15mm-
The sphere of action of 25mm, the load transducer 144 are 30KN-50KN, and the sphere of action of the pull pressure sensor 135 is
80KN-120KN.In respective sensor sphere of action, it can meet the stretching of the geosynthetics based on soil medium
With axially loaded simulation test.
Further, also referring to Fig. 1 to Fig. 3, as geotechnique's synthesis material provided by the invention based on soil medium
Expect a kind of specific implementation mode of tensile test apparatus, the filler in the soil sample box 12 is the soil body.The soil body tamps soil sample
Box 122 and lower soil sample box 121 make geosynthetics be tested in soil medium to make test data more accurate,
The stretcher strain situation being more in line under three-dimensional stress constraint, also allows for qualitative and quantitative analysis.
Further, also referring to Fig. 1 to Fig. 3, as geotechnique's synthesis material provided by the invention based on soil medium
Expect tensile test apparatus a kind of specific implementation mode, the data collector with the cross horizontal stretch device 13
Displacement sensor 138, the displacement sensor 146 of the xial feed loading device, the load transducer 144 and the tension and compression
Force snesor 135 is electrically connected, and can be by the data record during experiment, the data acquisition computer on the console 2
Conditional curve is tested in upper display.
Experiment process is specially：It by the 121 back-filling in layers soil sample of lower soil sample box of soil sample box 12 and is compacted first, in lower soil sample
After the top of box 121 is put into geosynthetics, four groups of clamping devices 131 are clamped into geosynthetics, by upper soil sample box
Soil sample is backfilled in 122 and is compacted, and regulates every layer of cross horizontal stretch device 13 so that geosynthetics is four sides
It is located at suitable position upwards, clamping device 131 is to first pass through the adjusting of handwheel 139, is then accurately adjusted by console 2, and
Geosynthetics is set to be in initial stressed state, it is clean state that each sensor, which is arranged, puts down xial feed loading device
14 bearing plate 145, controls the parameter of each stepper motor 137 and axially loaded oil cylinder 143 on console 2, startup power supply,
Each sensor starts to work and records the ess-strain information of geosynthetics, transfers data to the data of console 2
Collecting computer, and it is shown as stress-strain diagram.
The advantageous effect of geosynthetics tensile test apparatus provided by the invention based on soil medium is：1) double
More meet force-bearing situation of the geosynthetics in the soil body than traditional one directional tensile test with axially loaded experiment to stretching,
Different horizontal stretch ratio values can be arranged in four groups of stepper motors 137 of cross horizontal stretch device 13, freely adjusted,
Flexibly grasp；
2) on the basis of realizing biaxial tension, using soil medium constraint in such a way that Normal stress is combined, fully
Stretcher strain situation of the geosynthetics under three-dimensional stress constraint at different buried depth is simulated, while test data is remembered in real time
Quantification and qualification is convenient in record；
3) clamping device slides on linear guides, ensure that geosynthetics sample stress is equal when horizontal direction stretches
It is even, reduce test error, the drawing force Pass Test specification of application, test data accuracy rate height；
4) 12 size of soil sample box increased in size on the basis of meeting code requirement is realizing soil medium effect of contraction
Meanwhile the influence of equipment boundary effect and specimen size effect can be reduced；
5) horizontal force that can apply is larger, allows the deflection of material larger, and the xial feed of application is larger, to fully
Test the performance of geosynthetics deformation；
6) three layers of host body panel 1 are arranged, it is compact-sized, it can test, can also test respectively, freedom and flexibility simultaneously, improve
Test efficiency solves the problems, such as equipment occupation of land, meets the requirement of test accuracy.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. the geosynthetics tensile test apparatus based on soil medium, it is characterised in that：Including two layers or more of mainframe
Platform, the console and data collector being connected with the host body panel；
The host body panel includes installation frame, be set on the installation frame for holding filler and installation test specimen
Soil sample box for the cross horizontal stretch device of specimen test and is located at the soil sample box positioned at four side of soil sample box
The xial feed loading device of side；
The cross horizontal stretch device includes clamping device for clamping test pieces, the line that is fixed on the installation frame
Property guide rail, the sliding block being fixedly connected with the clamping device being arranged on the linear guides are connect with the clamping device
Lead screw, the pull pressure sensor between the clamping device and the lead screw, connect with the other end of the lead screw
Retarder, the stepper motor being connect with the retarder, the displacement sensor being arranged on the retarder and for moving
State the handwheel of clamping device position；
The xial feed loading device includes installing crossbeam, the column for being set to the installation below the crossbeam both sides, being set to
Axially loaded oil cylinder on the installation crossbeam, the load transducer being set on the axially loaded oil cylinder, be set to it is described
The bearing plate of axially loaded oil cylinder end contacted with soil sample box upper surface, the displacement sensing being arranged on the bearing plate
Device；
The console is used to set the rate of extension and setting xial feed loading device of the cross horizontal stretch device
Xial feed；The data collector is used to acquire horizontal pull and displacement data during experiment, and can display real-time
Test conditional curve.
2. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described
Soil sample box is located at the center of the host body panel, including lower soil sample box and upper soil sample box, the lower soil sample box and described
Upper soil sample box is the cavity rectangular box of upper and lower opening, and geosynthetics sample is located at the lower soil sample box and the soil loading
Between sample box.
3. the geosynthetics tensile test apparatus based on soil medium as claimed in claim 2, it is characterised in that：It is described
The size of lower soil sample box and the upper soil sample box is 300mm × 300mm.
4. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described
Clamping device is four groups, is located at four sides of the soil sample box, is in symmetrical cross arrangement, the clamping device
The ambulatory splint for including the strap being connect with the sliding block and being connect by Bolt dismantling formula with the strap, test specimen
It is clamped by the ambulatory splint.
5. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described
Linear guides, the sliding block, the lead screw, the retarder, the stepper motor, the handwheel, the pull pressure sensor
And institute's displacement sensors are four groups.
6. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described
Installation frame arranges that the cross horizontal stretch device is connected with the installation frame in cross.
7. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described
Host body panel is three groups, and host body panel size described in three groups and structure arrange all same, are located at the master of lowest part
The lower end of framework platform is equipped with several supporting racks, and the xial feed loading device for being located at lower part can be by installation cross
Beam is fixed on the bottom end of the installation frame.
8. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described
The sphere of action of the displacement sensor of cross horizontal stretch device is 50mm-150mm, the position of the xial feed loading device
The sphere of action of displacement sensor is 15mm-25mm, and the sphere of action of the load transducer is 30KN-50KN, the pressure
The sphere of action of sensor is 80KN-120KN.
9. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：It is described
Filler in soil sample box is the soil body.
10. the geosynthetics tensile test apparatus based on soil medium as described in claim 1, it is characterised in that：Institute
State displacement of the data collector with the displacement sensor of the cross horizontal stretch device, the xial feed loading device
Sensor, the load transducer and pull pressure sensor electrical connection, and can be by the data record during experiment, in institute
It states and shows experiment conditional curve on the data acquisition computer on console.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810387622.2A CN108645712A (en) | 2018-04-26 | 2018-04-26 | Geosynthetics tensile test apparatus based on soil medium |
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| CN201810387622.2A CN108645712A (en) | 2018-04-26 | 2018-04-26 | Geosynthetics tensile test apparatus based on soil medium |
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| CN201810387622.2A Pending CN108645712A (en) | 2018-04-26 | 2018-04-26 | Geosynthetics tensile test apparatus based on soil medium |
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| CN110220776A (en) * | 2019-03-22 | 2019-09-10 | 兰州德科工程材料有限公司 | A kind of geotechnical grid multi-shaft stretching testing machine |
| CN112229702A (en) * | 2020-11-06 | 2021-01-15 | 防灾科技学院 | Test equipment for geosynthetic materials |
| CN112461648A (en) * | 2020-10-06 | 2021-03-09 | 湖北超卓航空科技股份有限公司 | Testing device for fatigue performance detection of sample piece |
| CN114813392A (en) * | 2022-05-05 | 2022-07-29 | 中国电建集团成都勘测设计研究院有限公司 | On-spot ring shear test system of soft intermediate layer of ground |
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