CN109115106A - Anchoring body producing device and anchoring interface strain piece method of attaching in model test - Google Patents
Anchoring body producing device and anchoring interface strain piece method of attaching in model test Download PDFInfo
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- CN109115106A CN109115106A CN201810966753.6A CN201810966753A CN109115106A CN 109115106 A CN109115106 A CN 109115106A CN 201810966753 A CN201810966753 A CN 201810966753A CN 109115106 A CN109115106 A CN 109115106A
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- anchoring body
- template
- anchor
- pedestal
- anchoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
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- General Physics & Mathematics (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The present invention relates to anchoring body producing device in a kind of model test and anchoring interface strain piece method of attaching, the anchoring body producing device includes template, pedestal and connector, template is made of two pieces of thin plates with multiple semicircle drillings, it is connected and fixed after inserted base card slot with connector and pedestal, the anchor pole inserted base anchor pole location hole of foil gauge will be pasted with, and mortar is injected in the circular hole that template is formed, taking-up anchoring body can be demoulded after mortar and anchor pole adhesive solidification, then model test is inserted into after anchoring body surface mount foil gauge to excavate in the anchor hole of cavern and inject mortar bonding.The present invention solve geomechanical model test for a long time can not anchoring body interface paste foil gauge so that can not validity test anchoring body interfacial stress transmitting and stress distribution law technical problem, provide new test method for underground engineering anchor mechanism research.
Description
Technical field
The present invention relates to a kind of underground engineering experimental rig, anchor is made in specifically a kind of geomechanical model test
The device of solid and the operating method that the stickup of anchoring body interface strain piece is carried out using the device.
Background technique
Anchor pole is widely used in underground engineering as a kind of effective supporting means, but due to geotechnical engineering
The complex nature of the problem, it is still unintelligible to the understanding of the mechanism of action anchor rod anchored in rock mass at present, seriously constrain suspension roof support skill
The development of art makes the theoretical level of Design of bolt support much lag behind engineering practice.When country rock is mobile to free space, power
Transmitting is first by rock mass to binding material, then by binding material to anchor pole, is related to the complex transfer process of 3 kinds of media and 2 interfaces,
Wherein the pass through mechanism of interfacial stress and the regularity of distribution are only the emphasis of anchorage effect Mechanism Study.However current domestic and foreign scholars
The stress transfer and the regularity of distribution to focus mostly between research anchor pole and binding material, to the anchoring between country rock and binding material
Body interface stress transfer and Study on regularity are very few, and basic reason is in model test not breaking through viscous in anchoring body interface
Paste the technical problem of foil gauge.
Geomechanical model test method based on the theory of similarity is all Study of The Underground engineering excavation branch all the time
The important means for protecting effect, plays very big impetus to the development of underground engineering, provides treasured for engineering design and construction
Expensive test data, therefore there is realistic feasibility using model test method research anchoring body interfacial stress pass through mechanism.
Currently, being ground both at home and abroad about anchoring body production in geomechanical model test with what anchoring body interface strain piece was pasted
It is as follows to study carefully status:
(1) " Chinese Journal of Rock Mechanics and Engineering " the 1st phase in 2010 describes a kind of production side of anchoring body in model test
Anchor pole is extracted after excavation and is inserted into miniature anchor rod simultaneously after forming anchor hole by method, the anchor pole being relatively large in diameter using pre-plugged
It injects mortar bonding and forms anchoring body, which cannot paste foil gauge in anchoring body interface, thus be unable to test acquisition anchoring body
Stress transfer and the regularity of distribution on interface, it is difficult to effectively disclose the deep underground engineering suspension roof support mechanism of action comprehensively.
(2) production method that " civil engineering journal " the 9th phase in 2011 describes anchoring body in a kind of model test uses
Be that miniature anchor rod is inserted into using hand drilling's pore-forming after model cavern excavation and injects mortar production anchoring body, should
Method cannot paste foil gauge in anchoring body interface, thus be unable to test the stress transfer obtained on anchoring body interface and advise with distribution
Rule, it is difficult to effectively disclose the deep underground engineering suspension roof support mechanism of action comprehensively.
(3) " Chinese Journal of Rock Mechanics and Engineering " the 12nd phase in 2014 describes a kind of production side of anchoring body in model test
Method is anchored using the model of compacting trimming molding after-frame is set positioning device drill and being embedded to bolt grouting bonding production
Body, but foil gauge cannot be pasted in anchoring body interface, thus it is unable to test the stress transfer and distribution obtained on anchoring body interface
Rule, it is difficult to effectively disclose the deep underground engineering suspension roof support mechanism of action comprehensively.
(4) production method that " rock-soil mechanics " the 7th phase in 2008 describes anchoring body in a kind of model test, using
Surface mount there is into the pre-buried insertion model anchor hole of anchor pole of foil gauge and slip casting forms anchoring body, but cannot be in anchoring body interface
Foil gauge is pasted, thus is unable to test the stress transfer and the regularity of distribution obtained on anchoring body interface, it is difficult to effectively be disclosed comprehensively
The deep underground engineering suspension roof support mechanism of action.
(5) application No. is 201110206161.2 patents of invention to have developed one kind for supporting of underground engineering model experiment
Grouting rock bolt and operating method, using outside the body of rod wrap up mortar make anchoring body, be inserted into anchor hole simulation supporting, should
Method cannot paste foil gauge in anchoring body interface, thus be unable to test the stress transfer obtained on anchoring body interface and advise with distribution
Rule, it is difficult to effectively disclose the underground engineering suspension roof support mechanism of action comprehensively.
Summary of the invention
It is a kind of simple and practical the purpose of the present invention is providing to overcome the shortcomings of above-mentioned existing test method and technology, it tears open
Unload conveniently, energy-saving and environment-friendly anchoring body producing device for geomechanical model test and utilize device progress anchoring body circle
The operating method of face strain gauge adhesion.
To achieve the above object, the present invention adopts the following technical solutions:
A kind of geomechanical model test anchoring body producing device, including pedestal, template and connector, the template by
Two pieces of identical organic glass thin plate compositions that multiple semicircle drillings are vertically distributed with, the semicolumn of two organic glass thin plates
Shape drilling is grouped together into multiple cylindrical bores, and the cylindrical bore forms anchoring body for injecting mortar；?
Two organic glass thin plate lower part arranged on left and right sides respectively have a symmetrical connecting hole, for being connected with pedestal；Described
It is distributed a rectangle card slot on pedestal, card slot is inserted into after two organic glass thin plate alignment and is connect by connector with pedestal solid
It is fixed.
Further, the template is made of two pieces of identical organic glass thin plates, and multiple semicircles are distributed in template
Shape drilling, two pieces of template alignment rear pattern plates centres form multiple circular bores, form anchoring body for injecting mortar, template is divided into
Two the main reason for be facilitate it is subsequent to anchoring body demould.
Further, the pedestal, which is one piece, has certain thickness poly (methyl methacrylate) plate, and base top distribution one is rectangular
Shape card slot, card slot centre position are drilled with downwards multiple anchor pole location holes, and the anchor pole location hole is formed after being located at template alignment
Round hole center at, card slot left end fixes an organic glass block, with facilitate to insertion card slot after template alignment.
Further, the connector is fixing bolt, and the fixing bolt is to be caught in the alignment of pedestal card slot in template
Afterwards, the connecting hole being inserted into baffle and template, template and pedestal are fixed as one.Geology power is utilized invention additionally discloses a kind of
It learns model test anchoring body producing device and carries out the operating method that anchoring body interface strain piece is pasted, the specific steps are as follows:
1) assembling device.
By two pieces of plexiglass template inserted base card slots and after being aligned, template is passed through with template fixing bolt and pedestal is kept off
Bolt hole in plate is simultaneously tightened, and is connected and fixed template with pedestal and is integral.
2) body of rod surface strain piece is pasted.
By miniature anchor rod surface wipes it is clean after, anchor surface paste equidistantly distributed unidirectional foil gauge, wait strain
A protective layer is set on its surface after piece bonding is stable, and keeps protective layer dry；
Specifically, protective layer can use epoxide-resin glue, and it is put in ventilation and dries, asphalt mixtures modified by epoxy resin is smeared on foil gauge surface
Rouge glue plays the role of waterproof, moisture-proof and insulation and obturation, keeps foil gauge without damage；
3) anchoring body is poured.Successively the anchor pole location hole in the anchor pole inserted base card slot dried, and mortar (gypsum
The mixed liquor that powder, bird's eye gravel sand and water stir evenly) it injects in the cylindrical bore that template is formed and pours along the anchor pole of insertion
Anchoring body is built, device need to be put on shake table when pouring and sufficiently be vibrated, to guarantee to pour the compactness of anchoring body, will finally be poured
It builds successful anchoring body and is put into togerther fog room maintenance together with device.
4) it demoulds.After the completion of anchoring body maintenance, template fixing bolt is removed, pedestal and template is separated, then separates
Two pieces of organic glass thin plates take out the anchoring body in template upper half circular hole.
5) anchoring body surface strain piece is pasted.By the anchoring body surface wipes of taking-up it is clean after identical as anchor pole foil gauge
Position paste unidirectional foil gauge, and coat a protective layer on anchoring body foil gauge surface；
Then the protective layer is put in ventilation and dried using epoxide-resin glue to prevent foil gauge from damaging.
6) it is embedded to anchor hole.Anchoring body insertion model test after air-drying is excavated in the anchor hole of cavern, and anchor hole diameter is greater than
Then anchoring body 1~2mm of diameter injects gypsum liquid in the gap of anchor hole and is adhesively fixed.
The present invention has following technical advantage:
(1) technical problem of anchoring body interface strain piece stickup is breached.It in advance will anchoring using anchoring body producing device
Body is separately separated production, and the method for anchor hole is embedded to after surface mount foil gauge, solves viscous in anchoring body interface strain piece
It pastes and validity test acquisition anchoring body interfacial stress transmits the technical problem with the regularity of distribution accordingly, for underground engineering anchoring
Shield mechanism study provides new test method.
(2) anchoring body producing device simple structure of the present invention, disassembly be easy, energy conservation and environmental protection, there is repeatable recycle
The advantages of.
(3) easy to learn using anchoring body producing device progress anchoring body interfacial stress, the operating method of strain testing, side
Just practical, it has broad application prospects.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is anchoring body producing device structural schematic diagram；
Fig. 2 is schematic diagram of base structure；
Fig. 3 is formwork structure schematic diagram；
Fig. 4 is the miniature anchor rod schematic diagram of strain gauge adhesion；
Fig. 5 is the anchoring body schematic diagram of strain gauge adhesion；
In figure, 1 is pedestal；2 be baffle；3 be card slot；4 be block；5 be bolt of lower base hole；6 be anchor pole location hole；7 are
Template；8 be template bolt hole；9 be fixing bolt；10 be miniature anchor rod；11 be anchor pole foil gauge；12 be anchoring body；13 be anchor
Solid foil gauge.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination；
In order to facilitate narration, if there is "upper", "lower", " left side " " right side " printed words in the present invention, only expression and attached drawing itself
Upper and lower, left and right direction it is consistent, not to structure rise restriction effect, it is only for convenient for description the present invention and simplification retouch
It states, rather than the equipment of indication or suggestion meaning or element must have a particular orientation, and be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
As background technique is introduced, both at home and abroad about anchoring body production in geomechanical model test and anchoring body circle
The present Research of face strain gauge adhesion method, in order to solve technical problem as above, present applicant proposes a kind of geomechanics moulds
The device of anchoring body is made in type test and carries out the operating method that anchoring body interface strain piece is pasted using the device；The present invention
Foil gauge can not be pasted in anchoring body interface and then can not validity test anchoring by solving geomechanical model test for a long time
The technical problem of body interface stress transfer and stress distribution law provides new test side for underground engineering anchor mechanism research
Method, the invention device simple structure, convenient disassembly, energy conservation and environmental protection, it is repeatable recycle, while operating method is simple, is easy
It grasps, has broad application prospects.
In a kind of typical embodiment of the application, in FIG. 1 to FIG. 3, template 7 identical is vertically distributed with by two pieces
The organic glass thin plate of multiple semicircle drillings forms, and in the present embodiment, organic glass thin plate is rectangle, is also possible to other shapes
Shape；The semi-cylindrical drilling of two organic glass thin plates is grouped together into multiple cylindrical bores, the cylinder bur
Hole forms anchoring body for injecting mortar；The structure that the present invention combines template-setup at two poly (methyl methacrylate) plates is mainly
Facilitate the demoulding of anchoring body.
As shown in Fig. 2, the pedestal 1 in the present invention, which is one piece, has certain thickness poly (methyl methacrylate) plate, it is distributed at the top of pedestal 1
One with the consistent card slot 3 of template external form, the card slot in the implementation is cuboid；The intermediate position of card slot 3 is drilled with downwards multiple anchors
Bar location hole 6, the anchor pole location hole 6 are located at the round hole center formed after template alignment, and 3 left end of card slot is fixed
One organic glass block 4, to facilitate to the template alignment after insertion card slot；Organic glass block 4 also can be set on right side,
Template alignment can also similarly be played the role of.
In the card slot 3 formed on two pieces of organic glass thin plates alignment inserted bases 1 by baffle 2 and block 4, fixing bolt 9
Template 7 and the fixation of pedestal 1 are integral across bolt of lower base hole 5 and template bolt hole 8.
The reason of pedestal and template in the present invention use organic glass thin plate is that organic glass thin plate is body formed in anchoring
When, it is easy demoulding.
Connection between above-mentioned template and pedestal can also be connected using other connectors.
It is a kind of to carry out the operation that anchoring body interface strain piece is pasted using geomechanical model test anchoring body producing device
Method, comprising the following steps:
1) assembling device.In the card slot 3 of 7 inserted base 1 of template made of two pieces of organic glasses, it is abutted into card slot 3
The block 4 in left side is aligned two pieces of templates 7, then passes through bolt of lower base hole 5 and template bolt hole 8 with fixing bolt 9 and tightens,
It is integral template 7 with the fixation of pedestal 1.
2) body of rod surface strain piece is pasted.
As shown in figure 4, by 10 surface wipes of miniature anchor rod it is clean after, it is equidistant with 602 strength glues on body of rod surface
Anchor pole foil gauge 11, smear the epoxide-resin glue of a thickness about 1mm on 11 surface of anchor pole foil gauge after stabilization to be bonded, and put
It is dried in ventilation, epoxide-resin glue plays the role of waterproof, moisture-proof and insulation and obturation.
3) anchoring body is poured.The miniature anchor rod 10 dried successively is inserted into the anchor pole location hole 6 in card slot 3, and by mortar
(mixed liquor that land plaster, bird's eye gravel sand and water stir evenly) injects the circle that template 7 is formed along the miniature anchor rod 10 of insertion
Anchoring body 12 is poured in hole, device need to be put on shake table when pouring and sufficiently be vibrated, to guarantee the compactness of anchoring body 12, most
After will pour successful anchoring body 12 together with device be put into togerther fog room maintenance.
4) it demoulds.After the completion of the maintenance of anchoring body 12, template fixing bolt 9 is removed, pedestal 1 is gently tapped with hand hammer makes it
It is separated with template 7, is then inserted into the gap separate template 7 between two pieces of templates 7 with thin blade, takes out in 7 upper half circular hole of template
Anchoring body 12.
5) anchoring body surface strain piece is pasted.
As shown in figure 5, by 12 surface wipes of anchoring body of taking-up it is clean after position identical with anchor pole foil gauge 11 use
602 strength glue anchoring body foil gauges 13, and the epoxy resin of a thickness about 1mm is coated on 13 surface of anchoring body foil gauge
Then glue is put in ventilation and dries.
6) it is embedded to anchor hole.Anchoring body 12 after air-drying is inserted into model test to excavate in the anchor hole of cavern, anchor hole diameter is big
In anchoring body 1~2mm of diameter, gypsum liquid is then injected in the gap of anchor hole and is adhesively fixed.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (7)
1. anchoring body producing device in model test, which is characterized in that including pedestal, template and connector, the template by
Two pieces of identical organic glass thin plate compositions that multiple semicircle drillings are vertically distributed with, the semicolumn of two organic glass thin plates
Shape drilling is grouped together into multiple cylindrical bores, and the cylindrical bore forms anchoring body for injecting mortar；?
Two organic glass thin plate lower part arranged on left and right sides respectively have a symmetrical connecting hole, for being connected with pedestal；Described
It is distributed a card slot completely the same with template external form on pedestal, passes through company after being inserted into card slot after two organic glass thin plate alignment
Fitting is connected and fixed with pedestal.
2. anchoring body producing device in model test as described in claim 1, which is characterized in that the pedestal, which is one piece, to be had
Certain thickness poly (methyl methacrylate) plate, base top are distributed one and the consistent card slot of template external form, and position is bored downwards among card slot
There are multiple anchor pole location holes, the anchor pole location hole is located at the round hole center formed after template alignment.
3. anchoring body producing device in model test as described in claim 1, which is characterized in that the connector is to fix
Bolt, fixing bolt are the connecting holes being inserted into baffle and template, by template and pedestal after template is caught in the alignment of pedestal card slot
It is fixed as one.
4. anchoring body producing device in model test as claimed in claim 2, which is characterized in that the card slot left end
A block is fixed, to facilitate to the template alignment after insertion card slot.
5. a kind of carry out the behaviour that anchoring body interface strain piece is pasted using any anchoring body producing device of claim 1-4
Make method, which is characterized in that specific step is as follows:
1) assembling device
By two pieces of plexiglass template inserted base card slots and after being aligned, passed through in template and base baffle with template fixing bolt
Bolt hole and tighten, be connected and fixed template with pedestal and be integral；
2) body of rod surface strain piece is pasted.
Keep miniature anchor rod surface clean, pastes the unidirectional foil gauge of equidistantly distributed in anchor surface, bond and stablize to foil gauge
A protective layer is set on its surface afterwards, and keeps protective layer dry；
3) anchoring body is poured
Successively the anchor pole location hole in the anchor pole inserted base card slot in step 2), and mortar is injected along the anchor pole of insertion
Anchoring body is poured in the cylindrical bore formed to template；Successful anchoring body will be finally poured to conserve together with device；
4) it demoulds
After the completion of anchoring body maintenance, template fixing bolt is removed, separates pedestal and template, then by two pieces of machine sheets of glass
It separates, takes out the anchoring body in template upper half circular hole；
5) anchoring body surface strain piece is pasted
By the anchoring body surface wipes of taking-up it is clean after in position identical with anchor pole foil gauge paste unidirectional foil gauge, and in anchor
Protective layer is arranged in solid foil gauge surface；Then make protective layer dry；
6) it is embedded to anchor hole
By after drying anchoring body insertion model test excavate cavern anchor hole in, anchor hole diameter be greater than anchoring body diameter 1~
Then 2mm injects gypsum liquid in the gap of anchor hole and is adhesively fixed.
6. operating method as claimed in claim 5, which is characterized in that device need to be put in shake table when pouring in step 3
Upper sufficiently vibration, to guarantee to pour the compactness of anchoring body, will finally pour successful anchoring body be put into togerther together with device it is feeding
Protect room maintenance.
7. operating method as claimed in claim 5, which is characterized in that the protective layer is epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810966753.6A CN109115106B (en) | 2018-08-23 | 2018-08-23 | Anchoring body producing device and anchoring interface strain piece method of attaching in model test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810966753.6A CN109115106B (en) | 2018-08-23 | 2018-08-23 | Anchoring body producing device and anchoring interface strain piece method of attaching in model test |
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| CN109115106A true CN109115106A (en) | 2019-01-01 |
| CN109115106B CN109115106B (en) | 2019-07-12 |
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| CN110307024A (en) * | 2019-05-22 | 2019-10-08 | 河海大学 | A kind of liner structure anchor pole fast application device and its applying method |
| CN110487715A (en) * | 2019-08-23 | 2019-11-22 | 淮阴工学院 | A kind of high ductility cement-based material Single fiber pull-out test device and test method |
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| CN109115106B (en) | 2019-07-12 |
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