CN206818541U - A kind of jointed rock mass anchor pole dynamic loading experiment device - Google Patents
A kind of jointed rock mass anchor pole dynamic loading experiment device Download PDFInfo
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- CN206818541U CN206818541U CN201720687323.1U CN201720687323U CN206818541U CN 206818541 U CN206818541 U CN 206818541U CN 201720687323 U CN201720687323 U CN 201720687323U CN 206818541 U CN206818541 U CN 206818541U
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- steel
- anchor pole
- steel pipe
- rock mass
- plate
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Abstract
The utility model discloses a kind of jointed rock mass anchor pole dynamic loading experiment device, experimental rig includes dynamic test stand, joint bolt simulation device, power loading device, lift device, load harvester, displacement monitor, dynamic test stand includes i shaped steel and two steel columns, joint bolt simulation device includes steel pipe and anchor pole, steel pipe includes contacting with each other but unconnected top steel pipe and bottom steel pipe, steel plate is fixedly connected with i shaped steel, power loading device includes hollow drop hammer, cushion block, shock plate, lift device is used to be lifted and discharge hollow drop hammer, load harvester is used to gather the hollow caused load that drops hammer, displacement monitor is used for the displacement for monitoring anchor pole.The utility model is by designing and researching and developing joint bolt simulation device, power loading device, load, displacement data harvester etc..The stress characteristic of Rock Mass with Single anchor pole under Impact Load is analyzed, and studies the influence of impact load size, different joint positions to rockbolt stress characteristic.
Description
Technical field
The utility model is specifically related to a kind of jointed rock mass anchor pole dynamic loading experiment device, belongs to anchor pole loading test device
Technical field.
Background technology
With the continuous increase of mining depth, the stability in tunnel is into problem of concern under high stress.Rock mass exists
Largely elasticity energy is accumulated under high-stress state, destruction, inbreak occurs suddenly under certain condition or dishes out, makes energy unexpected
Release, the obvious dynamic effects such as the sound, vibrations and blast are presented.In recent years, about under dynamic loads jointed rock mass it is broken
Bad problem is also more and more prominent.At present, the on-the-spot test that the research of suspension roof support focuses mostly in a static condition is tested, similar mould
Numerical analysis is fitted, and to the dynamic response and mechanical property of tunnel supporting anchor rod under Under Dynamic Load, especially jointed rock mass anchor pole
The research report of energy is seldom.
Utility model content
Therefore, for the above-mentioned deficiency of prior art, the utility model purpose aims to provide a kind of jointed rock mass anchor pole and moved
Load test device.To obtain the test data of the relation at impact load and joint between the plastic deformation of anchor pole.
Specifically, jointed rock mass anchor pole dynamic loading experiment device, including it is dynamic test stand, joint bolt simulation device, dynamic
Force loading device, lift device, load harvester, displacement monitor, the dynamic test stand include i shaped steel
And two steel columns, the both ends of i shaped steel connect the top of two steel columns respectively, i shaped steel centre position is provided with perforate, described
Joint bolt simulation device includes steel pipe and anchor pole, and steel pipe includes contacting with each other but unconnected top steel pipe and bottom steel pipe,
Bottom steel pipe bottom connection backing plate, top steel pipe top junction steel plate, top steel pipe pass through perforate, and steel plate is fixed with i shaped steel
Connection, anchor pole is fixed on steel duct by grouting way and anchor pole passes from steel pipe bottom, and the power loading device includes
It is hollow drop hammer, cushion block, shock plate, the shock plate is fixed on steel pipe the position above the backing plate, and the cushion block is arranged on
On the outside of steel pipe and above shock plate, hollow drop hammer is sleeved on steel pipe and above cushion block, the heavy lift
Device be used for lifted and discharge it is hollow drop hammer, the load harvester be used for gather the hollow caused load that drops hammer, institute's rheme
Move the displacement that monitoring device is used to monitor anchor pole.
Further, the lift device includes the hoist engine of two linkages, and hollow drop hammer is provided with two links,
Hoist engine is fixed on i shaped steel by electronic grapple connecting ring, hoist engine.
Further, the load harvester includes first pressure sensor and second pressure sensor, and described first
Pressure sensor is arranged between shock plate and backing plate, and the pallet being fixedly mounted is provided with below backing plate, and second pressure sensor is set
Put between pallet and backing plate.
Further, the displacement monitor includes steel bar and bearing, and bearing is fixed on steel column, and steel bar is placed on branch
On seat and anchor pole passes among steel bar.
Further, the steel column is highly 2 meters, and the aperture of the perforate is 60 millimeters, and steel plate is bolted on
On i shaped steel.
Further, the steel pipe total length is 1.5 meters, and its middle and lower part length of steel pipe is 0.3 meter, 0.5 meter or 0.8 meter,
Steel duct is provided with screw thread, 28 millimeters of pipe diameter, 38 millimeters of outer diameter of steel pipes, and anchor pole material is HRB335 reinforcing bars, rock-bolt length
For 1.3 meters, a diameter of 18 millimeters, anchor pole exposed length is 0.3 meter.
Further, it is described it is hollow drop hammer as steel hollow cylinder, ratio of height to diameter 1: 2, weight 400kg, it is hollow fall
Hammer center hole diameter is bigger than diameter of steel tube 4 millimeters, and the cushion block is wood block filler.
Further, the steel plate is the rectangular steel plates of 30 centimetres of the length of side, and thickness is 10 millimeters, and the plate thickness is side
Long 10 centimetres rectangular steel plates, thickness are 6 millimeters.
Further, rubber blanket is provided between the bottom of described two steel columns, the shock plate is welded on steel pipe, impact
Plate thickness is 5 centimetres.
The beneficial effects of the utility model are：
In summary, the utility model is by designing and researching and developing joint bolt simulation device, power loading device, load,
Displacement data harvester etc..The stress characteristic of Rock Mass with Single anchor pole under Impact Load is analyzed, and studied
The influence of impact load size, different joint positions to rockbolt stress characteristic.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model jointed rock mass anchor pole dynamic loading experiment device.
Fig. 2 is the signal of the utility model jointed rock mass anchor pole dynamic loading experiment three kinds of steel pipe crack arrangements of device
Figure.
Reference is as follows：
11- i shaped steels；12- steel columns；13- rubber blankets；
21- steel pipes；22- anchor poles；23- backing plates；
24- steel plates；31- is hollow to drop hammer；32- cushion blocks；
33- shock plates；34- pallets；41- hoist engines；
42- links；The electronic grapples of 43-；51- first pressure sensors；
52- second pressure sensors；61- steel bars；62- bearings.
Embodiment
Specific embodiment of the present utility model is illustrated below in conjunction with the accompanying drawings：
The technical solution of the utility model is：According to impact test principle, dynamic test stand is built, using on two steel pipes
The mode of lower docking forms crack, and according to the market survey of shop test equipment Machinability Evaluation, the dynamic loading experiment of design fills
Put as shown in Figure 1.Study of dynamic load is based primarily upon experiment, impact test of the design pouring weight under certain speed, passes through load, position
Data acquisition device is moved, obtains test data, analysis draws the relation at impact load and joint between the plastic deformation of anchor pole.
Dynamic test stand is built：Testing stand both sides are steel column 12, and high 2m, top is i shaped steel 11, is welded with steel column 12.
The middle position of i shaped steel 11 is provided with perforate, aperture 60mm, and joint bolt simulation device may pass through the perforate, be suspended on I-shaped
On shaped steel 11, blending bolt is fixed.
Joint bolt simulation device：As shown in Fig. 23 kinds of steel pipes 21 of design, the Design of length of steel pipe 21 is 1.5m, for simulation
Frictional force between rock mass and binding agent, the inside of steel pipe 21 use Design of Screw Thread, steel pipe 21 internal diameter 28mm, external diameter 38mm, anchor pole
22 using HRB335 reinforcing bar, long 1.3m, protruded length 0.3m, in diameter 18mm, Fig. 2 from left to right, crack position difference
It is arranged on away from anchor head 0.3m, 0.5m and 0.8m, affecting laws of the analysis of experiments difference crack position to anchor pole load.
Power loading device：Hollow drop hammer 31 is steel hollow cylinder, ratio of height to diameter 1: 2, gross weight 400kg, center
Circularhole diameter is bigger 4mm than the diameter of steel pipe 21, and 31 bottoms of dropping hammer are symmetrical arranged wood block filler 32.Anchor rod device insertion is hollow to drop hammer in 31
Hole, hollow drop hammer 31 can be lifted and discharged, and design attitude is promoted to by lifting device, then be discharged by electronic grapple 43, after
The movement of falling object.According to ability conversion and law of conservation, the potential energy of weight-drop is the kinetic energy of hammering.According toDetermine that weight transfers last speed, impact load F caused by weight determined by momentum formula Ft=mv,
Time t uses high-velocity scanning cameras record.
Lift device：Hollow drop hammer 31 is provided with link 42, and electronic grapple 43 uses Electronic control, electronic grapple 43
After pinning link 42, lifted with the hoist engines 41 of two linkages and hollow drop hammer 31.
Load harvester：Load is recorded using pressure sensor, first pressure sensor 51 and second pressure sensor
52 record the actual loading at hollow drop hammer 31 direct imposed loads and anchor rod pallet board 34 respectively.
Displacement monitor：The anchor head of anchor pole 22 is arranged to displacement observation point, and bearing 62 is welded and fixed on steel column 12,
Reference material is steel bar 61 with holes, is ridden upon on hold-down support 62, and the anchor head of anchor pole 22 uses vernier calliper through the hole on steel bar 61
Chi tests observation station and the distance of steel bar 61.
Test procedure：
1. building testing stand, the steel column 11 of testing stand both sides is anchored on the ground, upper weld i shaped steel 12.
2. steel pipe 21 makes, steel pipe 21 divides two parts up and down, top steel pipe top welding steel 24,24 thick 10mm of steel plate,
Rectangle length of side 30cm, jewel hole on steel plate 24, reserve bolt fixing hole hole；Bottom steel pipe bottom composition backing 23, backing plate 23 are thick
6mm, rectangle length of side 10cm, 23 middle jewel hole of backing plate, diameter 20mm, reserved anchor pole 22 penetrate hole.
3. setting the hoist engines 41 of two linkages on i shaped steel 12, electronic grapple 43 is pinned into hollow drop hammer on 31
Link 42, hollow drop hammer 31 is promoted to highest point, rubber blanket 13 is laid below testing stand.
4. making joint anchor rod device, shock plate 33 thick to bottom steel-pipe welding 5cm first, steel pipe 21 is interior to be in the milk, anchor
Gu agent uses the preferable G moulding mixtures of mobility, to prevent slurries from flowing out, top steel pipe uses plastic film seal, and bottom steel pipe is first inserted
Enter anchor pole 22, to steel pipe about 21 two parts distinguish injection slurry to full, when the slurries in the steel pipe of top are half-dried, be passed through
Hollow drop hammer 31 is suspended on blending bolt on i shaped steel 11 and fixed, then the anchor pole 22 of bottom steel pipe is rapidly inserted into top steel pipe
It is interior, allow interface to close.
5. after the Anchor Agent in steel pipe 21 is absolutely dry, to adding second pressure sensor 52 among pallet 34 and backing plate 23,
Simultaneously be located in the both sides of shock plate 33 below cushion block 32 position placement two first pressure sensors 51, equipment place after just
It can be tested, hollow drop hammer 31 is transferred into specified location, electronic grapple 43 is operated while opens, hollow drop hammer is dropped down onto under 31
Shock plate 33, direct load value is recorded by first pressure sensor 51, load reaches anchor pole 22 by steel pipe 21, the body of rod by
Draw, the recordable payload values for reaching the shaft of anchor pole 22 of the second pressure sensor 52 at pallet 34.
Once tested 6. often doing, using the time of the hollow 31 contact impact plates 33 that drop hammer of high-velocity scanning cameras record and
The instantaneous maximum that one pressure sensor 51 obtains.Directly measured by slide measure monitoring point for displacement away from standard steel bar 61 away from
From and the top and the bottom of steel pipe 21 opening displacement.
Described above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of principle described in the utility model is not departed from, some improvements and modifications can also be made, these improvement
The scope of protection of the utility model is also should be regarded as with retouching.
Claims (9)
1. a kind of jointed rock mass anchor pole dynamic loading experiment device, including the loading of dynamic test stand, joint bolt simulation device, power
Device, lift device, load harvester, displacement monitor, it is characterised in that the dynamic test stand includes I-shaped
Shaped steel and two steel columns, the both ends of i shaped steel connect the top of two steel columns respectively, and i shaped steel centre position is provided with perforate,
The joint bolt simulation device includes steel pipe and anchor pole, and steel pipe includes contacting with each other but unconnected top steel pipe and bottom steel
Pipe, bottom steel pipe bottom connection backing plate, top steel pipe top junction steel plate, top steel pipe pass through perforate, steel plate and i shaped steel
It is fixedly connected, anchor pole is fixed on steel duct by grouting way and anchor pole passes from steel pipe bottom, the power loading device
Including it is hollow drop hammer, cushion block, shock plate, the shock plate is fixed on steel pipe the position above the backing plate, and the cushion block is set
Put on the outside of steel pipe and above shock plate, hollow drop hammer is sleeved on steel pipe and above cushion block, the weight
Lifting device be used for lifted and discharge it is hollow drop hammer, the load harvester be used for gather the hollow caused load that drops hammer, institute
State the displacement that displacement monitor is used to monitor anchor pole.
2. jointed rock mass anchor pole dynamic loading experiment device as claimed in claim 1, it is characterised in that the lift device
Include the hoist engine of two linkages, hollow drop hammer is provided with two links, and hoist engine passes through electronic grapple connecting ring, hoist engine
It is fixed on i shaped steel.
3. jointed rock mass anchor pole dynamic loading experiment device as claimed in claim 1, it is characterised in that the load harvester
Including first pressure sensor and second pressure sensor, the first pressure sensor is arranged between shock plate and backing plate,
The pallet being fixedly mounted is provided with below backing plate, second pressure sensor is arranged between pallet and backing plate.
4. jointed rock mass anchor pole dynamic loading experiment device as claimed in claim 1, it is characterised in that the displacement monitor
Including steel bar and bearing, bearing is fixed on steel column, and steel bar is placed on bearing and anchor pole passes among steel bar.
5. jointed rock mass anchor pole dynamic loading experiment device as claimed in claim 1, it is characterised in that the steel column is highly 2
Rice, the aperture of the perforate is 60 millimeters, and steel plate is bolted on i shaped steel.
6. jointed rock mass anchor pole dynamic loading experiment device as claimed in claim 1, it is characterised in that the steel pipe total length is
1.5 meters, its middle and lower part length of steel pipe is 0.3 meter, 0.5 meter or 0.8 meter, and steel duct is provided with screw thread, 28 millimeters of pipe diameter, steel
38 millimeters of pipe external diameter, anchor pole material are HRB335 reinforcing bars, and rock-bolt length is 1.3 meters, a diameter of 18 millimeters, and anchor pole exposed length is
0.3 meter.
7. jointed rock mass anchor pole dynamic loading experiment device as claimed in claim 1, it is characterised in that described hollow to drop hammer as steel
Matter hollow cylinder, ratio of height to diameter 1: 2, weight 400kg, the hollow center hole diameter that drops hammer is bigger than diameter of steel tube 4 millimeters, institute
It is wood block filler to state cushion block.
8. jointed rock mass anchor pole dynamic loading experiment device as claimed in claim 1, it is characterised in that the steel plate is the length of side 30
Centimetre rectangular steel plates, thickness be 10 millimeters, the plate thickness be 10 centimetres of the length of side rectangular steel plates, thickness be 6 millimeters.
9. jointed rock mass anchor pole dynamic loading experiment device as claimed in claim 1, it is characterised in that the bottom of described two steel columns
Rubber blanket is provided between portion, the shock plate is welded on steel pipe, and impact plate thickness is 5 centimetres.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720687323.1U CN206818541U (en) | 2017-06-14 | 2017-06-14 | A kind of jointed rock mass anchor pole dynamic loading experiment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720687323.1U CN206818541U (en) | 2017-06-14 | 2017-06-14 | A kind of jointed rock mass anchor pole dynamic loading experiment device |
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| CN206818541U true CN206818541U (en) | 2017-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720687323.1U Expired - Fee Related CN206818541U (en) | 2017-06-14 | 2017-06-14 | A kind of jointed rock mass anchor pole dynamic loading experiment device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303332A (en) * | 2018-03-12 | 2018-07-20 | 湖南科技大学 | A kind of device and method of research prestressed anchor dynamic characteristics |
| CN111141593A (en) * | 2020-01-15 | 2020-05-12 | 东南大学 | Anchor rod system anchoring slurry-soil body interface mechanical characteristic detection device |
| WO2023194917A1 (en) * | 2022-04-05 | 2023-10-12 | Fci Holdings Delaware, Inc. | Systems for dynamic testing of a ground support element |
-
2017
- 2017-06-14 CN CN201720687323.1U patent/CN206818541U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303332A (en) * | 2018-03-12 | 2018-07-20 | 湖南科技大学 | A kind of device and method of research prestressed anchor dynamic characteristics |
| CN108303332B (en) * | 2018-03-12 | 2023-11-03 | 湖南科技大学 | Device and method for researching dynamic mechanical characteristics of prestressed anchor rod |
| CN111141593A (en) * | 2020-01-15 | 2020-05-12 | 东南大学 | Anchor rod system anchoring slurry-soil body interface mechanical characteristic detection device |
| CN111141593B (en) * | 2020-01-15 | 2022-03-08 | 东南大学 | Anchor rod system anchoring slurry-soil body interface mechanical characteristic detection device |
| WO2023194917A1 (en) * | 2022-04-05 | 2023-10-12 | Fci Holdings Delaware, Inc. | Systems for dynamic testing of a ground support element |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171229 Termination date: 20210614 |