CN108931367A - A kind of borehole simulation device for anchor rod drawing test - Google Patents
A kind of borehole simulation device for anchor rod drawing test Download PDFInfo
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- CN108931367A CN108931367A CN201810876634.1A CN201810876634A CN108931367A CN 108931367 A CN108931367 A CN 108931367A CN 201810876634 A CN201810876634 A CN 201810876634A CN 108931367 A CN108931367 A CN 108931367A
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- steel pipe
- wall
- anchor
- dock
- test
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- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000004088 simulation Methods 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 61
- 239000010959 steel Substances 0.000 claims abstract description 61
- 230000003139 buffering effect Effects 0.000 claims abstract description 18
- 238000005520 cutting process Methods 0.000 claims abstract description 8
- 238000003032 molecular docking Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims 1
- 238000005553 drilling Methods 0.000 abstract description 19
- 239000011435 rock Substances 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007586 pull-out test Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000011160 research Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000004992 fission Effects 0.000 description 3
- 238000009533 lab test Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 244000144985 peep Species 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000005074 turgor pressure Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
A kind of borehole simulation device for anchor rod drawing test is mutually butted the dock steel pipe constituted by two semicircle tube walls including axial direction, and the inner wall of dock steel pipe has the cutting for increasing coefficient of friction；The semicircle buffering steel plate washer of two be mutually butted is cased on the outer wall of dock steel pipe, buffering has locating slot on the outer wall of steel plate washer, there is the stirrup being fastened by bolts in locating slot.The borehole simulation device can more accurately simulate the actual use operating condition of anchor pole, improve the accuracy of anchor rod drawing test result；Simulator can be dismantled after the completion of test, Anchor Agent or rockbolt stress deformation in observation simulation drilling are conducive to analyze anchor pole and improved；Device integral strength is high, convenient for disassembly and assembly, reusable.
Description
Technical field
The present invention relates to geotechnical engineering support technologies, especially a kind of for drawing in laboratory anchor pole (or anchor cable)
Pull out the borehole simulation device of test.
Background technique
Suspension roof support is the summation of the supporting construction based on anchor pole, it is a kind of simple active support side of structure
Formula has the characteristics that low in cost, the easy for construction and deformation controlling for rock surrounding gateways effect of transport is good.Suspension roof support realizes support pattern
Major transformation, the integrity and stability of country rock can be kept to the maximum extent, can efficiently control country rock deformation, displacement and
The development in crack gives full play to the supporting role of country rock itself.Anchor pole just causes mining circle of the world and subterranean tunnel from appearance
The extensive concern of construction etc..
Bolt System mainly includes that support member, external fixation and inside are fixed.Wherein, support member refers to bar
Body；Outside fixation refers to pallet and nut；Inside fixation refers to obturation (resin or cement mortar) for packed type anchor pole, right
Refer to the friction behavior between anchor rod body or anchoring body and the wall of a borehole (between anchor rod body and country rock for friction rock bolt
Medium).To packed type anchor pole, when being axially stretched load, load is transferred in obturation along anchor pole, obturation and country rock it
Between contact surface bearing load effect；To friction rock bolt, the power on anchor rod body is acted directly on contact surface.Therefore, needle
To packed type anchor pole, drills and play the role of being the bonding resistance constrained between obturation and offer and obturation；For friction
Type anchor pole, the effect of drilling are to provide biggish restraining force and limit the expansion of expander, generate larger turgor pressure, and then provide
Biggish frictional force.
Need to carry out pull-out test to the anchor pole newly developed, the pull-out test of anchor pole is divided into on-the-spot test and laboratory is surveyed
Examination.
On-the-spot test is most widely used anchor rod drawing test mode.On-the-spot test is the country rock in actual production operation
Middle construction drill, then installs anchor pole in the borehole, is tested using anchor force of the draw-off gear to anchor pole.As Hu Jianlin,
" development and its pullout tests research of expanding figure anchor pole " of Zhang Peiwen；" the recoverable of Pang Youshi, Liu Hanlong, Gong Yi army etc.
Anchor pole pullout tests research "；" the pressure type anchor rod pullout tests research based on rock stratum " etc. for opening four gentle Chen Chao, belongs to existing
Field test.The advantages of on-the-spot test is that speed of application is fast, at low cost；The disadvantage is that borehole conditions are difficult by field experiment environmental restrictions
To guarantee；In addition, being difficult to avoid influence of the factors such as temperature, water, rock mass structure to test at the scene under complex environment, it is difficult to
Carry out anchor rod drawing power by the analysis and research of single factors influence degree；Further more, the drilling of site operation is unable to shape in peep hole
Condition is unfavorable for analyzing the influence factor of anchor rod anchored index.
Based on drawbacks described above existing for anchor pole on-the-spot test, the pull-out test of new anchor pole trial-production early period generally uses laboratory
Test.Anchor pole laboratory test mostly uses certain thickness steel pipe to simulate drilling.Such as woods it is strong " in resin full length fastening anchor
Bar outer dimension optimizes laboratory research ", Kang Hongpu etc. adopts " in resin anchor anchoring property and analysis of Influential Factors "
It is simulated and is drilled with steel pipe.Simulating the advantages of drilling with steel pipe is: 1. steel strength is high, can be used for simulating unlimited a wide range of rock mass
Constraint；2. steel pipe is from a wealth of sources, easy processing.The disadvantage is that: 1. steel pipe internal-surface smoother, the hole wall coarse to scene are simulated
Deficiency, cannot the actual applying working condition of fine simulation anchor pole；2. being difficult to observe after test due to using complete steel pipe
The stress deformation situation of Anchor Agent or anchor pole into steel pipe；3. the test for resin anchor, anchor rod with cement mortar is used for mould
Quasi- steel pipe often can only be disposable；4. the test to friction rock bolts such as hydraulic expansion anchor pole, pipe-seam type anchor rods, anchor pole
It is being rubbed more smooth to pull out rear inner surface of tube wall, reuse rate is low；5. for the anchor pole with itself expansive force
The test of (such as hydraulic expansion anchor pole, self-expanding anchor pole), because the intensity requirement to drilling is high, to the wall thickness of the steel pipe of simulation drilling
It is required that also correspondingling increase, the cost consumption of simulation drilling steel pipe is increased.
The laboratory test of anchor pole also has using cement specimen and simulates drilling.Such as " the glass fibre reinforced plastics rockbolts drawing of Zhang Jie
Power testing experiment project study "；" the anchor rod drawing experimental study " of Sui Haibo is to pour water using the plasticity feature of cement
Mud test specimen, prefabricated drilling or cutting drilling in test specimen.The advantages of this method, is: 1. can use the spy that hydrated cementitious is hardened
Point simulates different wall rock drill-holes by different cement-sand ratios；2. can be different coarse by being produced on the hole wall of drilling
Drilling in the boring surface simulation actual production of degree.The disadvantage is that: 1. concreting part is long curing cycle, large labor intensity,
Cost of manufacture is high；2. drilling cannot reuse；3. being used for the survey of friction rock bolt (such as hydraulic expansion anchor pole, self-expanding anchor pole)
Examination, to avoid the concrete sample for simulating drilling in drawing process from destroying, wall thickness and test specimen to concrete drill hole it is big
Small requirement is high.
Summary of the invention
The object of the present invention is to provide one kind can simulate the actual use operating condition of anchor pole, may be reused, convenient for sight
Examine the borehole simulation device for anchor rod drawing test of Anchor Agent or rockbolt stress deformation in experiment metapore.
Provided by the present invention for the borehole simulation device of anchor rod drawing test, including axial direction is by two semicircle tube wall phases
Mutually the dock steel pipe that docking is constituted, the inner wall of dock steel pipe have the cutting for increasing coefficient of friction；Dock steel pipe
The semicircle buffering steel plate washer of two be mutually butted is cased on outer wall, buffering has locating slot on the outer wall of steel plate washer, in locating slot
There is the stirrup being fastened by bolts.
Beneficial effects of the present invention:
1, borehole simulation device of the present invention is using the simulation drilling of dock steel pipe, and increases in the inner wall of steel pipe and improve friction
The cutting of coefficient can more accurately simulate the actual use operating condition of anchor pole, improve the accuracy of anchor rod drawing test result.
2, anchor rod drawing test is carried out using borehole simulation device of the present invention, simulator can be dismantled after completing test,
Anchor Agent or rockbolt stress deformation in observation simulation drilling, are conducive to analyze anchor pole and improved.
3, borehole simulation device of the present invention is locked dock steel pipe by buffering steel plate washer using stirrup, it is ensured that simulation
The intensity of drilling reaches anchor pole eighth day of the twelfth lunar month test request；Meanwhile anchor pole is applied to the pressure on simulation drill hole inner wall and passes through buffering steel
Gasket is distributed on stirrup, can weaken the pressure that stirrup is subject to, and reduces requirement of the stirrup to Material Strength, is conducive to save device
Manufacturing cost.
4, anchor rod drawing test after device is dismantled, on dock steel pipe inner wall adhesive or Anchor Agent remove, dress
Set it is reusable, be conducive to save experimentation cost.
5, anchor rod drawing test is carried out using borehole simulation device of the present invention, it is easy to operate, convenient.
Detailed description of the invention
Fig. 1 is the partial schematic diagram of borehole simulation device of the present invention；
Fig. 2 is A-A cross-sectional view along Fig. 1；
Fig. 3 is the partial schematic diagram (semi-cutaway) that steel plate washer is buffered in Fig. 1；
Fig. 4 is the radial section fission figure of dock steel pipe in Fig. 1；
Fig. 5 is the radial section fission figure that steel plate washer is buffered in Fig. 1；
Fig. 6 is the section fission figure of stirrup in Fig. 1.
Symbol description in figure: 1- dock steel pipe, 2- buffer steel plate washer, 3- stirrup, 4- bolt, 5- cutting, 6- locating slot.
Specific embodiment
Specific implementation of the invention is described further below in conjunction with drawings and examples.
In conjunction with Fig. 1 to Fig. 6, the present embodiment borehole simulation device, including axial direction are mutually butted structure by two semicircle tube walls
At dock steel pipe 1, the inner wall of dock steel pipe has the cutting 5 for increasing coefficient of friction；In the outer wall of dock steel pipe
On be cased be mutually butted two semicircle buffering steel plate washers 2, buffering on the outer wall of steel plate washer has locating slot 6, has in locating slot
Pass through the stirrup 3 that bolt 4 is fixed.
The production method of the dock steel pipe 1 is to select rigidity and hardness is larger, wall thickness 5mm, outer diameter 53mm, length
The thick walled steel tube that degree is 1.5m is raw material, and semicircle two parts are axially cutd open into using laser cutting parameter, process rank at docking
Trapezoidal (section is as shown in Figure 4), in order to which two parts are mutually butted；The inner surface of dock steel pipe carve mutual spacing 5~
10mm, the cutting 5 that depth is 1mm simulate the rock mass of different roughness to improve the coefficient of friction of steel pipe internal-surface.
The production method of the buffering steel plate washer 2 is that choosing is with dock steel pipe same material, same thickness, outer diameter
The hard thick walled steel tube of 60mm, semicircle two parts are axially cutd open into using laser cutting parameter, are then 15cm by every segment length
It is cut into ten sections, stairstepping is equally processed at every section of two-part docking (section is as shown in Figure 5)；Simultaneously in every section of buffering steel pad
Processed on the outer wall of piece depth be 1~2mm three locating slots 6, wherein be located in the middle locating slot width be 30mm (with
Stirrup it is of same size), the width positioned at the locating slot at both ends is respectively 15mm (two sections of buffering steel plate washer joint formation widths
For the locating slot of 30mm).
The stirrup 3 by width is 30mm (of same size with the locating slot on buffering steel plate washer outer wall), with a thickness of 40~
The high rigidity stainless steel plate of 50mm is processed into two parts shown in Fig. 6, and two parts dock the inner hole aperture ratio to be formed buffering steel plate washer
Small 1~the 2mm of outer diameter at locating slot；The mounting hole passed through for bolt is processed respectively at the two-part docking of stirrup.
The assemble method of the borehole simulation device is:
By two parts of the above-mentioned dock steel pipe processed by being mutually fitted at stairstepping docking, complete steel is constituted
Pipe, to simulate drilling；Then by phase female connector before and after process ten buffering steel plate washers on the outer wall of dock steel pipe, and
Its abutment joint is adjusted to be mutually perpendicular to the two-part abutment joint of dock steel pipe；The finally locating slot on buffering steel plate washer outer wall
In be socketed stirrup one by one, wear bolt in the mounting hole at stirrup docking, by tighten bolt make stirrup by buffering steel plate washer
Dock steel pipe is tightly locked.
This borehole simulation device can also be used for the pull-out test of anchor cable.
Claims (1)
1. a kind of borehole simulation device for anchor rod drawing test, it is characterised in that: including axial direction by two semicircle tube walls
It is mutually butted the dock steel pipe (1) of composition, the inner wall of dock steel pipe has the cutting (5) for increasing coefficient of friction；Docking
Semicircle buffering steel plate washer (2) of two be mutually butted is cased on the outer wall of formula steel pipe, buffering has positioning on the outer wall of steel plate washer
Slot (6) has the stirrup (3) fastened by bolt (4) in locating slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810876634.1A CN108931367A (en) | 2018-08-03 | 2018-08-03 | A kind of borehole simulation device for anchor rod drawing test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810876634.1A CN108931367A (en) | 2018-08-03 | 2018-08-03 | A kind of borehole simulation device for anchor rod drawing test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108931367A true CN108931367A (en) | 2018-12-04 |
Family
ID=64445312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810876634.1A Pending CN108931367A (en) | 2018-08-03 | 2018-08-03 | A kind of borehole simulation device for anchor rod drawing test |
Country Status (1)
| Country | Link |
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| CN (1) | CN108931367A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784590A (en) * | 2016-04-22 | 2016-07-20 | 华北水利水电大学 | Method and device for testing bonding strength of anchoring interface of anchoring system |
| CN106124321A (en) * | 2016-08-21 | 2016-11-16 | 安徽理工大学 | A kind of detachable anchor rod anchored attribute testing platform |
| CN206270169U (en) * | 2016-11-24 | 2017-06-20 | 河南理工大学 | A kind of repeatable anchor rod drawing experimental apparatus for testing for utilizing |
| CN206410989U (en) * | 2016-12-14 | 2017-08-15 | 四川中核艾瑞特工程检测有限公司 | A kind of cement anchoring agent anchor force experiment simulation aperture apparatus |
| CN207527171U (en) * | 2017-11-22 | 2018-06-22 | 江苏德创制管有限公司 | A kind of pipe fitting connects anchor ear |
| CN207634114U (en) * | 2017-12-14 | 2018-07-20 | 中国矿业大学(北京) | A kind of recyclable bolt diameter and bore diameter matching test device |
| CN208420365U (en) * | 2018-08-03 | 2019-01-22 | 东北大学 | A kind of borehole simulation device for anchor rod drawing test |
-
2018
- 2018-08-03 CN CN201810876634.1A patent/CN108931367A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784590A (en) * | 2016-04-22 | 2016-07-20 | 华北水利水电大学 | Method and device for testing bonding strength of anchoring interface of anchoring system |
| CN106124321A (en) * | 2016-08-21 | 2016-11-16 | 安徽理工大学 | A kind of detachable anchor rod anchored attribute testing platform |
| CN206270169U (en) * | 2016-11-24 | 2017-06-20 | 河南理工大学 | A kind of repeatable anchor rod drawing experimental apparatus for testing for utilizing |
| CN206410989U (en) * | 2016-12-14 | 2017-08-15 | 四川中核艾瑞特工程检测有限公司 | A kind of cement anchoring agent anchor force experiment simulation aperture apparatus |
| CN207527171U (en) * | 2017-11-22 | 2018-06-22 | 江苏德创制管有限公司 | A kind of pipe fitting connects anchor ear |
| CN207634114U (en) * | 2017-12-14 | 2018-07-20 | 中国矿业大学(北京) | A kind of recyclable bolt diameter and bore diameter matching test device |
| CN208420365U (en) * | 2018-08-03 | 2019-01-22 | 东北大学 | A kind of borehole simulation device for anchor rod drawing test |
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