CN105510158B - Anchoring body dynamic tensile test device and experimental method - Google Patents
Anchoring body dynamic tensile test device and experimental method Download PDFInfo
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- CN105510158B CN105510158B CN201610014740.XA CN201610014740A CN105510158B CN 105510158 B CN105510158 B CN 105510158B CN 201610014740 A CN201610014740 A CN 201610014740A CN 105510158 B CN105510158 B CN 105510158B
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
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Abstract
Patent of the present invention discloses a kind of anchoring body dynamic tensile test device and experimental method.The present invention applies weight arm device, the shock loading conversion of weight freely falling body is enlarged into the shock loading acted on anchor pole, by adjusting balance pivot position, change the value of suffered tensile load on anchor pole, the response pattern that research different loads, different stretch speed are casted anchor in solid interface.The present invention realizes the dynamic drawing of anchor pole, the first and second interfacial detachment failure regularity studied has certain engineering significance to bump anchoring tunnel anchoring body inefficacy mechanism using guider, lever amplification device.
Description
Technical field
The present invention relates to a kind of Dynamic Loading lower bolt anchoring body experimental rig and test method, more particularly to one kind
The making of anchor rod anchored matrix and anchoring body stretching test method.
Background technology
With the increase of pit mining depth, rock burst, bump, coal and gas prominent, top plate large area are dynamic to press etc.
The frequency and intensity more and more higher shown is pressed, larger threat is caused to mine laneway surrounding rock stability and personal security.
At present, anchor pole static(al) drawing experimental technique comparative maturity, have to all interfaces of anchoring body and compare profound understanding, but it is right
The all interfacial failure mechanism of dynamic drawing anchoring body is still unintelligible.Patent " a kind of anchor pole performance test that all brightness in 2013 etc. are declared
Device ", disclose the experiment test device of a kind of anchor pole static(al) stretcher strain and dynamic shock resistance；2014 Nian Lu states fortune etc.
The patent " a kind of dynamic drawing experimental provision impacted under active confined pressure and experimental method " declared, disclose a kind of impact master
Dynamic draw-off gear and experimental method under dynamic confined pressure；" one kind is used to test anchor pole punching the patent that Kang Hongpu in 2014 etc. is declared
Hit the testing stand and method of testing of load ", disclose a kind of testing stand and method of testing for testing anchor pole shock loading；2014
The patent " a kind of anchor pole dynamic load bringing device " that all pools etc. are declared, discloses a kind of anchor pole dynamic load bringing device；Will be to anchoring body
All interfaces（Resin-hole wall, anchor pole-resin and potential rock mass damage interface）Dynamic characteristic carry out numerical simulation, theory side
The research in face, it is necessary to which its mechanical property is studied by laboratory test.
The content of the invention
The present invention is intended to provide under a kind of impact loading, the anchorage body body of rod-the first interface of resin dynamic experiment
Device, the shearing force distribution under the effect of research trends load on the interface.The present invention applies weight-leverage, and impact is carried
The shock loading acted on anchor pole is changed-be enlarged into lotus, by adjusting balance pivot position, changes institute's Tensile on anchor pole and carries
The value of lotus, the response pattern that research different loads, different stretch speed are casted anchor in solid interface.
The invention provides a kind of impact loading lower bolt dynamic tensile experimental rig, including weight, anchoring body to draw
Stretch device, impact-lever transmission system, measuring system, test specimen making mould.The weight includes punching impact bloom, weight
Target, weight pass through locating rod, are fixed on by weight alignment pin on the column on tension weight churning device both sides, and quarter is labeled with column
Degree；Drilled on two heel posts, so that weight alignment pin inserts；Alignment pin is pulled out, weight can make freely falling body along vertical track
Motion, realizes tension weight churning；The test specimen is the cylinder specimen that armored concrete makes, and the test specimen also includes fastening dress
Put, test specimen center is mine anchor rod；The measurement apparatus includes acceleration transducer, PVDF dynamic loads sensor, metal foil
Formula foil gauge；The mine anchor rod of the test specimen center anchoring, both sides cutting vertically, groove is interior to paste foil gauge；The test specimen is tight
The arrangement of reinforcement being set to along test specimen edge disposed inboard is fixedly mounted with, revealed section reinforces screw thread in lower end, and fixing end is fastened on by nut；Institute
Stating impact-lever transmission system includes tension weight churning target, slideway, directive wheel, steel wire rope, lever, and weight is fallen with certain speed
Act on impact target, impact target drives the action of steel wire rope pull lever, and dynamic load is after lever amplification through steel wire rope, guiding
Wheel be delivered to mine anchor rod by pull end；The lever includes lever bearing, long-armed and galianconism, and the steel wire rope for connecting impact target connects
Adjutage, the steel wire rope of connecting mine anchor pole are connected to galianconism, are drilled on lever arm, anchor pole, install similar shaped steel wire rope system
The connection ring of work, steel wire rope are fixed in connection ring by screw thread；The lever short arm given length, it is long-armed with amplification coefficient not
With being changed, bearing is bolted assembling with lever；The weight is hollow pouring weight, is fallen along a graduated steel pole
Under, impact target is placed in a slide cartridge, steel wire rope connection lever short arm and impact target.
Above-mentioned impact target, weight, impact tapering point among be machined with pore, taper type impact end is installed in lower end；Weight edge
Guide rail falls, and impact target, makes it that shock loading be passed through into wire rope transfers to anchor pole one end along guide rail.Impact target upper end target
PVDF dynamic load sensors are installed at head, measurement weight is applied to the dynamic load of impact target；Be machined among impact target with
Upper end is installed on the size impact end consistent with above-mentioned taper impact end, the cutting of impact target side, and interior place of groove can connect steel
The sliding block of cord.It is hit after load, impact target declines along target slide cartridge.
Above-mentioned column includes tension weight churning device column, directive wheel column and lever shaft vertical columns, and its lower end is fixed
On base.
Tension weight churning device column makes for channel-section steel, indexing on channel steel upright post, upper equidistantly drilling.The top end of weight is left
Right both sides are machined with bellmouth, and tapered spigot passes through leghole, are fixed in a certain height of gate-type channel-section steel, pull out latch,
Weight free-falling can be made.
Above-mentioned lever is long-armed to be connected with galianconism by bearing, and galianconism one saves, and long-armed is some sections, is connected between each section for screw thread
Connect.
Above-mentioned guider is two groups of pulleys, and one group of pulley of long arm end guider is fixed on column；Lead at galianconism end
It is fixed on to device on one group of directive wheel column.
Above-mentioned long arm end column is that channel-section steel makes, and is fixed on base, and pulley is upper and lower, left and right is staggeredly arranged；Above-mentioned galianconism
Hold column be channel-section steel make, be fixed on base, pulley up and down, left and right be staggeredly arranged, be fixed in directive wheel fixed plate, guarantee
The steel wire rope that anchor rod drawing end is connected by directive wheel is vertical and axially concentric with anchor pole.
The invention provides a kind of experimental method of anchoring body dynamic tensile, comprise the following steps：
（1）The circular concrete sample in reserved rockbolt installation hole, is conserved 28 days among making, in case using.
（2）The both sides cutting of anchor pole axial direction, foil gauge is pasted, line sealing, is anchored in the hole of concrete sample.
（3）Test specimen is fixed on base, foil gauge wire is connected to dynamic strain indicator；In anchor pole revealed section and test specimen
It is upper that acceleration transducer and displacement transducer are installed respectively.
（4）Impact target is installed, installs PVDF dynamic load sensors thereon；The steel wire rope of each junction is connected,
And keep tensioning state.
（5）Lifting weight to setting height, release weight makes it impact impact target, drives steel wire rope, impact load is turned
Turn to the dynamic load shock loading for acting on anchor pole；Dynamic strain indicator records distribution and attenuation law of the dynamic loading along anchor pole axial direction,
The body of rod characteristics of motion of acceleration transducer anchor pole.
（6）Adjust weight drop height, repeat above step, can study loading speed to the interface of anchor pole-Anchor Agent first,
The affecting laws of second contact surface cohesive force distribution.
Beneficial effects of the present invention：
（1）The present invention is related to using weight, impact target, lever, steel wire rope, directive wheel, and the whereabouts dynamic loads of weight are turned
Change, be enlarged into the dynamic pulling capacity acted on anchoring body, it is achieved thereby that the dynamic tensile experiment of anchoring body.
（2）Using the dynamic load of dynamic load sensor record impact target, using acceleration transducer, displacement transducer
Acceleration and the displacement of Under Dynamic Load lower bolt exposed junction are recorded, record anchor pole dynamic load drawing force-displacement curve can be quantified, with
Just pulling capacity and the influence of anchor pole bond-slip are analyzed.
（3）The present invention realizes the dynamic drawing of anchor pole using guider, lever amplification device, studied the,
First, second interface unsticking failure regularity has certain engineering significance to bump anchoring tunnel anchoring body inefficacy mechanism.
Brief description of the drawings：
Fig. 1 is apparatus of the present invention plant system drawing.
Fig. 2 is the tension weight churning installation drawing of apparatus of the present invention.
Fig. 3 is the weight-driven figure of the present invention.
Fig. 4 is impact target slide cartridge installation drawing.
Fig. 5 is the impact target figure of apparatus of the present invention.
Fig. 6 is the matrix die drawing of the present invention.
Fig. 7 is the anchoring body stretching device figure of the present invention.
Fig. 8 is the force-measuring anchor stock figure of apparatus of the present invention.
1 it is locating rod in figure, 2 be weight, 3 be weight column, 4 be impact target, 5 be steel wire rope fixed block, 6 is impact target
Slide cartridge, 7 be directive wheel column, 8 be directive wheel fixed plate, 9 be directive wheel, 10, be steel wire rope, 11 be lever junction button, 12 be
Lever, 13 be bearing, 14 be anchor pole, 15 be test specimen, 16 be test specimen arrangement of reinforcement, 17 be test piece base, 18 be T-shaped fixing bolt, 19
It is weight alignment pin for device pedestal, 20,21 is tension weight churning device column scale, 22 is weight locating rod hole, 23 is weight
Target, 24 be slide cartridge breach, 25 be impact target target head, 26 be PVDF dynamic loads sensor, 27 be thin-wall steel tube, 28 be PVC moulds
Tool pipe, 29 be bolt, 30 be mold base, 31 be acceleration transducer, 32 be foil gauge, 33 be fill glue.
Embodiment
The present invention is further illustrated below by specific embodiment, but is not limited to the example.
Embodiment：
Compares figure 1- Fig. 6 illustrates the composition of experimental provision of the present invention first：
A kind of impact loading lower bolt dynamic tensile experimental rig, including weight, anchoring body stretching device, impact-
Lever transmission system, measuring system, test specimen make mould etc..It is characterized in that：The percussion mechanism includes weight 2, weight target
23rd, impact target 4, slide cartridge 6.The test specimen is the cylinder specimen 15 that armored concrete makes, and periphery arrangement test specimen arrangement of reinforcement 16, is tried
Part center is mine anchor rod 14.
The measurement apparatus is including being fixed on the acceleration transducer 31 of anchor pole upper end, the PVDF of measurement weight dynamic loading is moved
State load transducer 26, the metal foil stain gauge 32 for measuring rockbolt stress.
The impact-lever transmission system includes tension weight churning target 4, weight column 3, directive wheel 9, steel wire rope 10, lever
12.Weight pulls out alignment pin, weight can make freely falling body along vertical track by being fixed on by alignment pin 20 on the column on both sides
Motion, realizes tension weight churning.Weight is fallen with certain speed and acted on impact target, and impact target drives steel wire rope pull lever to move
Make, dynamic loading after lever amplification through steel wire rope, directive wheel be delivered to mine anchor rod 14 by pull end；The lever includes lever
Bearing 13, long-armed and galianconism, connect impact target steel wire rope connection it is long-armed, the steel wire rope of connecting mine anchor pole is connected to galianconism,
Drilled on lever arm, anchor pole, the connection ring that similar shaped steel wire rope makes is installed, steel wire rope is fixed on connection ring by screw thread
On；The lever short arm given length, long arm end are fixed lever pipe nipple by lever junction button 11, realize no dynamic load amplification
Coefficient.
The anchor pole dynamic drawing experimental method of the lower mask body narration present invention：
A kind of anchoring body dynamic tensile test device and experimental method, it is characterised in that comprise the following steps：
（1）Liquid detergent is smeared into the outside of thin-wall steel tube 27, is placed in after being wrapped up with preservative film in the hole of mold base 30；Will
Cement, sand and the stone of certain ratio of mud are poured into matrix mould after stirring, while are placed on shake table, make its closely knit；
Thin-wall steel tube is can be taken off after 1d, maintenance can carry out next step experiment after 28 days.
（2）With（1）Carry out simultaneously, by the both sides cutting vertically of mine anchor rod 14, foil gauge 32 is bonded in groove, is then used
Marine glue 33 encapsulates, and adjacent two panels composition half-bridge circuit, rockbolt stress is monitored.
（3）T-shaped fixing bolt 18 is passed through into test piece base 17, matrix base is fixed on system base 19, then will
The lower end of test specimen arrangement of reinforcement 16 connects test piece base 17 with nut, completes the installation of test specimen, and epimere installs acceleration biography in anchor pole 14
Sensor 31.
（4）PVDF dynamic loads sensor 26 is installed into the upper end of impact target target head 25, while is put into impact target slide cartridge
6；By one end connection fixing block 5 of steel wire rope 10, other end connection lever 12；The one end of steel wire rope 10 ' connects lever short arm, the other end
Connect anchor pole upper end；Two steel wire ropes pass through directive wheel, it is desirable to the keep level of lever 12 and steel wire tensioning when installing.
（5）Connect monitoring instrument, the monitoring impact target loaded, rockbolt stress of institute and acceleration.
（6）Weight 2 is lifted to certain altitude, is fixed with weight alignment pin 20；After ready, while pull out determining for both sides
Position pin, weight target 23 hit impact target 25 with certain speed, and impact target moves downward in slide cartridge 6, drive steel wire rope and lever,
Dynamic loading after amplification is delivered to anchor pole.
（7）Weight release altitude or the long arm lengths of lever are adjusted, repeat above step, different loading speeds can be studied and moved
State pulling capacity acts on the dynamic drawing mechanical response of lower bolt anchoring body.
Claims (1)
- A kind of 1. experimental method of anchoring body dynamic tensile, it is characterised in that：Comprise the following steps（1）The circular concrete sample in reserved rockbolt installation hole, is conserved 28 days among making, in case using；（2）The both sides cutting of anchor pole axial direction, foil gauge is pasted, line sealing, is anchored in the hole of concrete sample；（3）Test specimen is fixed on base, foil gauge wire is connected to dynamic strain indicator；Divide on anchor pole revealed section and test specimen An Zhuan not acceleration transducer and displacement transducer；（4）Impact target is installed, installs PVDF dynamic load sensors thereon；The steel wire rope of each junction is connected, and is protected Hold tensioning state；（5）Lifting weight to setting height, release weight makes it impact impact target, drives steel wire rope, impact load is converted into Act on the dynamic load shock loading of anchor pole；Dynamic strain indicator records distribution and attenuation law of the dynamic loading along anchor pole axial direction, accelerates Spend the body of rod characteristics of motion of sensor record anchor pole；（6）Weight drop height is adjusted, above step is repeated, loading speed can be studied to the interface of anchor pole-Anchor Agent first, second The affecting laws of interfacial adhesion distribution；The experimental provision that above-mentioned experimental method uses mainly include weight, anchoring body stretching device, impact-lever transmission system, Measuring system, test specimen make mould；The weight includes punching impact bloom, weight target, and weight passes through locating rod, determined by weight Position pin is fixed on the column on tension weight churning device both sides, and scale is labeled with column；Drilled on two heel posts, so that weight is determined Position pin insertion, pulls out alignment pin, weight can make the movement of falling object along vertical track, realize tension weight churning；The test specimen is The cylinder specimen that armored concrete makes, the test specimen also include fastener, and test specimen center is mine anchor rod；The measurement Device includes acceleration transducer, PVDF dynamic loads sensor, metal foil stain gauge；The test specimen center anchors mining Anchor pole, both sides cutting vertically, groove is interior to paste foil gauge；The test specimen fastener is matching somebody with somebody along test specimen edge disposed inboard Muscle, in lower end, revealed section reinforces screw thread, and fixing end is fastened on by nut；The impact-lever transmission system is rushed including weight Target, slideway, directive wheel, steel wire rope, lever are hit, weight is fallen with certain speed and acted on impact target, and impact target drives steel wire Restrict pull lever action, dynamic loading after lever amplification through steel wire rope, directive wheel be delivered to mine anchor rod by pull end；The thick stick Bar includes lever bearing pivot, long-armed and galianconism, and long-armed to be connected with galianconism by bearing, galianconism one saves, and long-armed is some sections, respectively It is threaded connection between section；The steel wire rope connection of connection impact target is long-armed, and the steel wire rope of connecting mine anchor pole is connected to galianconism, Drilled on lever arm, anchor pole, the connection ring that similar shaped steel wire rope makes is installed, steel wire rope is fixed in connection ring by screw thread； The lever short arm given length, long-armed to be changed with amplification coefficient difference, bearing pivot is bolted dress with lever Match somebody with somebody；The weight is hollow pouring weight, is fallen along a graduated steel pole, and impact target is placed in a slide cartridge, steel wire rope connection Lever short arm and impact target.
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| CN201610014740.XA CN105510158B (en) | 2016-01-11 | 2016-01-11 | Anchoring body dynamic tensile test device and experimental method |
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| CN201610014740.XA CN105510158B (en) | 2016-01-11 | 2016-01-11 | Anchoring body dynamic tensile test device and experimental method |
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| CN105510158A CN105510158A (en) | 2016-04-20 |
| CN105510158B true CN105510158B (en) | 2018-04-03 |
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| CN107761788B (en) * | 2017-11-03 | 2019-04-19 | 中国矿业大学 | A kind of experimental provision suitable for anchoring cyclic tension, dynamic load extension test |
| CN110608960A (en) * | 2019-09-05 | 2019-12-24 | 北京金辰西维科安全印务有限公司 | Testing device and testing method |
| CN111024496A (en) * | 2019-11-28 | 2020-04-17 | 中国建筑第八工程局有限公司 | Force transmission device for anti-pulling test and detection method thereof |
| CN112067224B (en) * | 2020-09-18 | 2022-05-17 | 中煤科工开采研究院有限公司 | Detection method for whole-course dynamic load response characteristic of anchor rod in drop hammer impact mode |
| CN112540013A (en) * | 2020-11-24 | 2021-03-23 | 西华大学 | Impact test device for rod-shaped anchoring assembly |
| CN114018806A (en) * | 2021-10-14 | 2022-02-08 | 中山大学 | BFRP (bidirectional Forwarding resistance) bar and concrete dynamic bonding performance test system and test method |
| CN114323939B (en) * | 2021-12-20 | 2024-06-14 | 东北大学 | Comprehensive experimental device for static and dynamic tension and shear of anchor rod |
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