CN109060653A - Method and device for detecting bonding strength of bonding surface of laminated member - Google Patents
Method and device for detecting bonding strength of bonding surface of laminated member Download PDFInfo
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- CN109060653A CN109060653A CN201811023433.3A CN201811023433A CN109060653A CN 109060653 A CN109060653 A CN 109060653A CN 201811023433 A CN201811023433 A CN 201811023433A CN 109060653 A CN109060653 A CN 109060653A
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- 239000004567 concrete Substances 0.000 claims abstract description 78
- 238000001514 detection method Methods 0.000 claims abstract description 47
- 238000012360 testing method Methods 0.000 claims abstract description 28
- 239000000853 adhesive Substances 0.000 claims abstract description 21
- 230000001070 adhesive effect Effects 0.000 claims abstract description 21
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- 239000003292 glue Substances 0.000 claims abstract description 6
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- 238000004080 punching Methods 0.000 claims description 23
- 238000004873 anchoring Methods 0.000 claims description 13
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
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Abstract
The invention provides a method for detecting bonding strength of a bonding surface of a superposed member, which comprises the following steps: (1) drawing a steel bar distribution grid diagram; (2) drilling holes in the middle of the grid; (3) injecting bar planting glue into the drill hole, and inserting the harness cord screw into the hole after the glue injection is finished; (4) after the bar planting glue is cured, cutting a circular groove with the diameter being 50-60 mm larger than the bore diameter of the drilled hole by taking a harness cord screw as the center, wherein the depth is 10-20 mm larger than the thickness of post-cast concrete; (5) and (5) performing a drawing test. The detection method reduces the early treatment links of grinding the weak layer on the concrete surface and repairing and trowelling, does not cause result failure caused by adhesive damage of the adhesive layer in the detection result, and has convenient and quick detection process, clear stress and high applicability.
Description
Technical field
The invention belongs to build detection technique field, and in particular to a kind of detection side of superposed member faying face adhesion strength
Method and device.
Background technique
Assembly concrete building refers to based on the precast member for reinforcing bar concrete with the factorial production, passes through assembled in situ
Mode design-build concrete structure class building construction.It is generally divided into full assembly building and part assembly building two major classes:
Full assembly building is generally low layer or the lower tier building of requirements for fortification against earthquake；The main member of part assembly building is generally adopted
With prefabricated components, is connected at the scene by cast-in-place concrete, form the building of cast in place and precast construction.The characteristics of building
It is that speed of application is fast, is conducive to winter construction, high production efficiency, good product quality reduces material loss.
Assembly concrete is built because of quality height, short time limit, energy-saving consumption-reducing, advantages of environment protection, at present it is national just
Obtain large-scale popularization application.But since assembly concrete building uses a large amount of superposed members (beam, plate, wall), wherein overlapping
Pouring concrete is often constructed simultaneously after plate and composite beam, and area is big, reinforcing bar is intensive and pre-buried pipeline is various, if casting concrete
When vibrate leakiness or faying face cleaning be not thorough, easily form all kinds of defects on faying face, cause prefabricated components to pour with after mixed
Connection between solidifying soil not can guarantee the whole stress of structure, to be difficult to reach the original design intention of " equivalent cast-in-place ".Faying face
It is the weak link of iterative structure, faying face adhesion strength deficiency will lead to superposed member globality poor, and then cause structure
Early disease substantially reduces the durability of structure.
The method in relation to detecting concrete joint surface cohesive force has uniaxial direct tensile method, single side staight scissors method, double in the prior art
Face staight scissors method, compression shear method etc., but these common detection methods are to carry out in laboratory, there is also many with engineering reality
Difference.
Drill core bonding hubbing in the prior art is a kind of method that can be used for on-site test, but in Practical Project
In, since concrete surface usually has carbonization weak floor, generally require to abrade surface weak floor using artificial, and repair and smear
It is flat, even if but in this way, also usually will appear surface due to manual operation etc. occurs glue-line adhesive failure.
For example, Publication No. CN106092880A, a kind of entitled on-site test deck paving interlayer bonding pull strength
The Chinese patent application of device and detection method discloses a kind of on-site test deck paving interlayer bonding pull strength detection side
Method, i.e., above-mentioned drill core bond hubbing, in Practical Project utilization, since there are weak floors for concrete surface, and need to use
It is artificial to abrade surface weak floor, and floating is repaired, being easy to appear surface, there is a phenomenon where glue-line adhesive failures.
Separately to have notification number be CN202614661U, a kind of entitled improved gunite concrete and the measurement of rock adhesion strength
Chinese patent, disclose it is a kind of improve transmission drill core hubbing measurement gunite concrete and rock adhesion strength device,
It is made into articulated connection between test specimen and anchor rod drawing instrument, i.e., bonds implantation one end band annulus on big plate in gunite concrete and rock
Bury hook, anchor rod drawing instrument pull rod goes out to pass through internally threaded sleeve to be connect with the crossover sub that one end band is linked up with, when measurement, hook hook
Firmly link makes to be formed between test specimen and anchor rod drawing instrument rotatable hinged, then measures anchor rod drawing instrument load.But
Because it mostly uses hydraulic hand-pump to be loaded, the problems such as force value during loading is discontinuous, and loading speed is unstable is deposited, no
It can be loaded with constant rate of loading, be influenced by manual operation, cohesive force result is had an impact.In addition, the Patent equipment
Anchor rod drawing instrument of use itself is more heavy, not portable light enough.Also, the instrument of anchor rod drawing instrument is typically only capable to display power
Value, also needing the later period artificially to handle calculating according to core sample cross section for adhesion strength could obtain.
Separately there is notification number to be CN105784590B, the method and dress that entitled test anchor system anchors section adhesion strength
The Chinese patent set discloses a kind of method of test anchor system anchoring section adhesion strength, is ground mainly for interface
Interface, Anchor Agent between Anchor Agent and the interface between anchor pole, both interfaces are all parallel to anchor rod drawing direction.And
It is not suitable for prefabricated cross between component and rear pouring concrete faying face in assembly concrete building perpendicular to drawing direction to bond
The detection of situation.
There are also Publication No. CN103015469A, the Chinese patent application of entitled embedding re-bar technique technique, disclose one kind
Embedding re-bar technique technique specifically discloses through bar planting and completes the transmitting of drawing load, but is building without open tendon-planted craft
The technical solution of faying face caking property context of detection.
To sum up, both at home and abroad for fabricated construction concrete joint surface adhesion strength on-site test and quantitative assessment not
Have to form unified method or standard, for faying face adhesion strength by defective effect degree also without in-depth study, and
There is an urgent need to technical solutions and standard in this respect for the construction and inspection of quality of Practical Project.
Summary of the invention
In view of this, the purpose of the present invention is to provide the detection methods and dress of a kind of superposed member faying face adhesion strength
It sets.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
On the one hand, the present invention provides a kind of detection methods of superposed member faying face adhesion strength, comprising the following steps:
(1) it draws reinforcing bar and is distributed grid chart；
(2) portion drills within a grid；
(3) anchoring adhesive is injected into drilling, and harness cord screw rod is inserted into hole after the completion of injecting glue；
(4) after bar planting adhesive curing, centered on harness cord screw rod, the circle that diameter is greater than 50~60mm of boring aperture is cut out
Slot, depth are greater than rear pouring concrete thickness 10mm~20mm；
(5) pull-out test is carried out.
Preferably, it in the step (1), is first positioned after superposed member inside pouring concrete before drawing reinforcing bar distribution grid chart
Reinforcement location and trend.
Preferably, in the step (2), the 60~100mm of drilling depth, bottom hole pitch faying face is that rear pouring concrete is thick
3rd/3rd to eight/10ths of degree, boring aperture 14mm.
Preferably, in the step (3), the harness cord screw diameter 12mm, length 120mm are slowly inserted into drilling hole
The anchoring adhesive overflowed out of hole is cleared up at bottom after insertion.
Preferably, in the step (4), the ratio between the circular groove diameter and screw rod implantation depth are greater than 1.0, after depth is greater than
Pouring concrete thickness 15mm.
Preferably, in the step (2), dust in cleaning eye after the completion of drilling.
Preferably, in the step (5), the drill core pull-out test is loaded onto core sample and destroys, records the final limit
Test value and destruction core sample height to judge the positive drawing adhesion strength of core sample and destroy position present position with this.
The present invention also provides a kind of detection devices of superposed member faying face adhesion strength, comprising:
Bracket, on building surface to be measured, including cradle top surface and support rod, the cradle top surface is logical with center for setting
Hole；
Punching jack is arranged on bracket；
Miniature electric hydraulic pump is connected with punching jack, including digital displaying meter；
Punching flexural pivot fixture nut is arranged on punching jack；
The central through hole of the cradle top surface is arranged concentrically with punching jack, punching flexural pivot fixture nut, for across
Harness cord screw rod.
Preferably, it is provided with foot screw on the support rod, for leveling bracket.
Preferably, the cradle top surface is provided with level vial device, is used to indicate whether device is in horizontality.
Compared with the existing technology, detection method has the advantage that by the way that harness cord screw rod is implanted into tested core sample
The drawing to core sample is realized in inside, anchors harness cord screw rod and core sample and is combined into an entirety, carries out pull-out test to drill core,
Scene reduces without abrading core sample surface carbonation weak floor and repairing core sample top surface and abrades concrete surface weak floor and repairing
The failure of result caused by glue-line adhesive failure will not occur in the pre-processing link of floating, testing result, and detection process is convenient
Fast, stress is clear, and applicability is high.In addition, 4 tons of detection device maximum load tonnage of the present invention, it is more light；Add tune
Flat structure overcomes load eccentric using flexural pivot, more stable, improves detection efficiency and precision；It is hydraulic using miniature electric
Pump can set different constant rate of loadings and be loaded.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is detection method construction schematic diagram of the invention；
Fig. 2 a is one schematic diagram of detection method core sample failure mode；
Fig. 2 b is two schematic diagram of detection method core sample failure mode；
Fig. 2 C is three schematic diagram of detection method core sample failure mode；
Fig. 2 d is four schematic diagram of detection method core sample failure mode；
Fig. 3 is the superposed member design drawing of detection method；
Fig. 4 is the ratio tested faying face under different section dust stratification area ratio using detection method and just drawing adhesion strength
Compared with；
Fig. 5 is the schematic cross-section of detection device of the present invention.
Description of symbols: 1- prefabricated components；Pouring concrete after 2-；3- faying face；4- harness cord screw rod；401- band connection set
The load bar of cylinder；The anchoring of 5- anchoring adhesive；6- cradle top surface；601- level vial device；7- support rod；701- foot screw；8- punching
Jack；9- miniature electric hydraulic pump；901- digital displaying meter；10- punching flexural pivot fixture nut.
Specific embodiment
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "left", "right", "top",
The orientation or positional relationship of the instructions such as "bottom" "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, merely to just
In description the present invention and simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with
Specific orientation construction and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature includes the first spy above the second feature " above ", " above " and " above "
Sign is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " include that fisrt feature is directly below and diagonally below the second feature, or is merely representative of
First feature horizontal height is less than second feature.
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.It should be noted that in the absence of conflict, embodiment and reality in the present invention
The feature applied in example can be combined with each other.
Embodiment 1
The present embodiment provides a kind of detection methods of superposed member faying face adhesion strength, comprising the following steps:
(1) it draws reinforcing bar and is distributed grid chart；
(2) portion drills within a grid；
(3) anchoring adhesive is injected into drilling, and harness cord screw rod is inserted into hole after the completion of injecting glue；
(4) after bar planting adhesive curing, centered on harness cord screw rod, the circle that diameter is greater than 50~60mm of boring aperture is cut out
Slot；
(5) pull-out test is carried out.
Referring to FIG. 1, in the present embodiment, detecting the bonding of the faying face 3 between prefabricated components 1 and rear pouring concrete 2
Intensity marks reinforcing bar distribution grid using reinforcement location and trend inside pouring concrete after reinforcing bar survey meter positioning superposed member
Line, so as to avoid reinforcing bar in subsequent progress drill core, in order to avoid got on reinforcing bar during drill core；Portion is using electricity within a grid
Hammer drills, and is used for subsequent implantation screw rod；Harness cord screw rod 4 is slowly inserted at once after injection anchoring adhesive until hole in drilling
Bottom；After bar planting adhesive curing, harness cord screw rod is cut out in its periphery compared with boring aperture centered on harness cord screw rod 4 by anchoring adhesive anchoring 5
Big slot, can be circular groove, be also possible to the slot of other shapes；Then carry out pull-out test, along harness cord screw axis vertically to
Upper drawing applies load p, is loaded onto core sample (diameter D) and destroys, and records final marginal test value and destroys sample core height,
To judge the positive drawing adhesion strength of sample core and the location of position is destroyed with this.By the way that harness cord screw rod is implanted into tested core sample
The drawing to core sample is realized in inside, to guarantee that core sample stress is more reasonable, scene is weak without abrading core sample surface carbonation
Layer and repairing core sample top surface, are not in the invalid test result such as glue-line adhesive failure, and detection efficiency is higher, and stress is more reasonable,
Applicability is high.
Wherein, in the step (2), the drilling depth 60mm, boring aperture 14mm had both guaranteed subsequent implantation screw rod
Limited anchorage depth also guarantees not influence faying face.Coagulation is poured after superposed member (such as superimposed sheet) on current architecture configuration
Soil thickness is usually 80-100mm, if screw rod implantation is too shallow (such as 20-30mm), it may occur however that rear pouring concrete shallow-layer is broken
It is bad, if too deep too close from faying face, disturbance may be generated to faying face, measured result may be relatively low.Therefore, the present embodiment hole
Bottom is 30mm away from faying face height H, is usually that 80-100mm is calculated by rear pouring concrete thickness, screw rod implantation depth is 50-70mm
Between, it both can guarantee the integral fastening of screw rod Yu core sample in this way, and also can avoid generating disturbance to faying face.With blowing after the completion of drilling
Dust in inflator and hairbrush cleaning eye guarantees that the subsequent anchoring adhesive of screw rod can be effectively firmly bonded with borehole wall.The step
(3) in, the harness cord screw diameter 12mm, length 120mm are slowly inserted into drilling hole bottom, and cleaning is overflowed out of hole after insertion
Anchoring adhesive；In the step (4), the ratio between the circular groove diameter and screw rod implantation depth are greater than 1.0, it is preferred that when the brill
When hole depth 60mm, the circular groove diameter 70mm accomplishes that the destruction to original structure subtracts as far as possible in the case where guaranteeing reasonable stress
It is small, while being conducive to the maximum load range request to loading equipemtn.Depth is greater than rear pouring concrete thickness d 15mm, so that
On the core sample drilled through, the faying face between rear pouring concrete and prefabricated components is kept completely separate with original structure periphery；Guarantee at faying face
Stress is axial tension state, if (taking circular groove depth is rear pouring concrete thickness) is only got at faying face, in drawing
In journey faying face edge actual forced status because stress concentrate, be not purely axial tension, also just can not using unidirectionally by
Tensile stress calculation formula；And guarantee that circular groove will not be drilled too deep, almost entire superposed member is drilled through.
In the step (5), multi-tester is connect with screw rod, keeps drawing direction parallel with core sample axis, slowly
At the uniform velocity load is until core sample occurs to destroy and records final ultimate load.
In the present embodiment, the core sample test specimen that depth is slightly larger than rear pouring concrete thickness is drilled through perpendicular to faying face direction, is led to
It crosses and axial drawing load is applied to the screw rod that core sample is implanted into until core sample test specimen destroys.It is assumed that core sample section be perpendicular to
The plane section in screw axis direction, ultimate load value P and core diameter D when being destroyed according to core sample, can be obtained core by formula (1)
The positive drawing adhesion strength of sample.
F=4P/ π D2 (1)
Core sample failure mode pours mixed after being divided into shown in faying face concrete destruction, Fig. 2 b shown in Fig. 2 a by cross section place
Solidifying soil destroys, core sample shown in prefabricated components concrete destruction shown in Fig. 2 c and Fig. 2 d integrally extracts destruction.When destruction shape
When formula is faying face concrete destruction, positive drawing adhesion strength f is the positive drawing adhesion strength of faying face；It is poured after failure mode is
When concrete destruction, show that the positive drawing adhesion strength of faying face is greater than rear pouring concrete axial tensile strength；When failure mode is
When prefabricated components concrete destruction, show that the positive drawing adhesion strength of faying face is greater than prefabricated components concrete axial tensile strength,
But because drill core it is too deep caused by core sample integrally extract destruction except.If screw rod extraction, the splitting of core sample etc. occurs in failure mode, other are non-
When normal failure mode, measuring point should be selected else and re-start test.
Preferably, the present embodiment superposed member is truss bars concrete folding plate, as shown in figure 3, having a size of 1620 ×
3720 × 60 (mm), plate face are equipped with regular diamond shape plucking, depth 5mm, and remaining design parameter meets national standard atlas " purlin
Frame Shear Behavior of R. c. Laminated Slabs " (15G366-1) requirement.Production process is as follows: 1) by different subregions processing overlapping plate face, cloth
Set plate face distributing reinforcement；2) fixed four side punching block of superimposed sheet is installed, adjustment height is to ensure that last layer thickness meets design requirement；3)
Arrange defect, casting concrete simultaneously vibrates, and then strikes off the face of pouring with darby；4) demoulding after 7d, then natural curing to 28d into
Row test.
Consider whether the loose part of cleaning superimposed sheet faying face and dust stratification, two kinds of processing feelings of wet faying face of whether sprinkling water
Condition, designs 4 kinds of operating conditions, and superimposed sheet is divided into 4 regions altogether, and specifying information is as shown in table 1 below.Test superimposed sheet and after pour
Layer concrete match ratio is as shown in table 2 below, and wherein concrete design strength grade is C30, and rear pouring concrete design thickness is
90mm, by two-way 10@of φ, 200 distributing reinforcement of engineering actual arrangement.
1 superimposed sheet surface treatment situation of table
2 concrete mix parameter of table
It is as follows to carry out analysis of experiments for detection method through this embodiment:
1, damage -form
From load is started up to final destruction, all there is not concrete cracking or breakage, shows center core sample in surface
There is no relative displacement occurs during the test for screw rod and core sample.When being loaded onto ultimate load, core sample occurs suddenly along whole
The brittle failure of a cross section destroys.It counts from the following table 3 it is found that in totally 74 core samples of test, the core height of 71 core samples is equal
Meet last layer design thickness, in conjunction with core sample after extraction section as it can be seen that it is respectively positioned on prefabricated components and rear pouring concrete combines
At face, section is serrated and sawtooth height is no more than 6mm, and middle calculate of meeting formula (1) just draws plane section when adhesion strength false
It is fixed.
3 test result of table summarizes
2, rear pouring concrete strength test results
Pouring concrete cured under same condition 28d test cube compression strength is 42.5MPa afterwards.According to existing national standards
" Code for design of concrete structures " (GB 50010-2010) regulation: when strength grade of concrete is C40, concrete axle center is anti-
Tensile strength standard value ftkFor 2.39MPa, concrete axial tensile strength design value ftFor 1.71MPa；Work as strength grade of concrete
When for C45, concrete axle center tensile strength standard value ftkFor 2.51MPa, concrete axial tensile strength design value ftFor
1.80MPa can extrapolate rear pouring concrete axial tensile strength standard value f using linear interpolationtkFor 2.45MPa, axle center tension
Strength failure criterion ftFor 1.76MPa.
In 74 core samples of live drawing, there are 3 core samples (B6, D1 and D8 core sample) not drill through faying face, surveys core
Height is less than 60mm, it is seen that core sample section is respectively positioned in rear pouring concrete, and test result is that rear pouring concrete tension is strong
Spend measured value.3 core sample tensile strength are respectively 4.08MPa, 4.37MPa and 3.99MPa, and actual measurement tensile strength average value is
4.15MPa。
3, influence whether faying face is cleared up to adhesion strength
Seen from table 3, no matter whether faying face is handled, and it is anti-that faying face is just drawing adhesion strength to be below rear pouring concrete actual measurement
Tensile strength illustrates that faying face is the weak part of prefabricated concrete structure.For the area A (does not clear up+sprinkles water) core sample,
It is positive to draw adhesion strength that rear pouring concrete axial tensile strength standard value f is not satisfiedtkIt is required that only basal area ash area ratio≤20%
A8 core sample just drawing adhesion strength meet after pouring concrete axial tensile strength design value ftIt is required that.For the area B (cleaning+watering)
For the area D (clear up+not sprinkling water) totally 36 core samples, wherein pouring concrete axle center after the positive drawing adhesion strength satisfaction of 20 core samples
Tensile strength standard value ftkIt is required that accounting only 56%, but it positive draws adhesion strength to substantially meet rear pouring concrete axle center tension
Strength failure criterion ftIt is required that it may be that concrete vibrating is not firm herein or overlapping plate face is deposited that B18 core sample, which is just drawing adhesion strength relatively low,
Caused by loose part, and D16 core sample is just drawing adhesion strength relatively low, may be caused by plate face cleaning is not thorough.(not for the area C
Clear up+do not sprinkle water) for core sample, pouring concrete axle center is anti-after only section is just drawing adhesion strength to meet without C2 the and C5 core sample of dust stratification
Tensile strength standard value ftkIt is required that pouring coagulation after just adhesion strength being drawn then to be not satisfied when basal area ash area ratio >=30%
Native axial tensile strength design value ftIt is required that.
Faying face weaker zone and dust stratification disposition are just drawing faying face the influence of adhesion strength as shown in figure 4, with disconnected
The increase of area ash area ratio, faying face are just drawing the substantially linear downward trend of adhesion strength.Due to shut-down, sand in Practical Project
The reasons such as dirt or negligent supervision cause plate face occur different degrees of dust stratification be it is that may be present, in conjunction with test data it is found that product
Ash has a significant effect to faying face adhesion strength, and thorough cleaning faying face weaker zone and dust stratification can just substantially meet its adhesion strength
The requirement of pouring concrete axial tensile strength design value after equivalent.
Above-mentioned test result it is found that detection method compared to drill core bond hubbing for, scene without abrade
The mistake of result caused by glue-line adhesive failure will not occur in core sample surface carbonation weak floor and repairing core sample top surface, testing result
Effect, detection process is convenient and efficient, and stress is clear, and applicability is high.
In addition, detection method also detects: under the premise of guaranteeing that drill core depth penetrates faying face, extracting core sample
Height meet last layer thickness, core sample section is respectively positioned at prefabricated components and rear pouring concrete faying face, no matter faying face
Whether handle, faying face is just drawing adhesion strength to be below rear pouring concrete actual measurement axial tensile strength, it was demonstrated that faying face is really
The weak part of assembly concrete superposed member.
And experimental study shows that being surface-treated situation has the adhesion strength of prefabricated components and rear pouring concrete faying face
Significantly affect, faying face adhesion strength with dust stratification area the substantially linear downward trend of increase.
Embodiment 2
The present embodiment provides a kind of detection devices of superposed member faying face adhesion strength, by provided by embodiment 1
Detection method carries out the detection of superposed member faying face adhesion strength, referring to Fig. 5, comprising: bracket is arranged in building table to be measured
Face, including cradle top surface 6 and support rod 7, the cradle top surface 6 have central through hole；Punching jack 8 is arranged on bracket；
Miniature electric hydraulic pump 9 is connected with punching jack 8, including digital displaying meter 901；Punching flexural pivot fixture nut 10, setting are being worn
On heart jack 8；The central through hole of the cradle top surface 6 and punching jack 8, punching flexural pivot fixture nut 10 is concentric sets
It sets, for across harness cord screw rod 4.
In the present embodiment, it is provided with foot screw 701 on the support rod 7, for leveling bracket.
Further, cradle top surface 6 described in the present embodiment is provided with level vial device 601, is used to indicate whether device is located
In horizontality.
Further, be additionally provided with the load bar 401 of band connection sleeve on the harness cord screw rod 4, connection sleeve with thereon
Load bar can be it is integrated.
When being detected using the present embodiment device, first harness cord screw rod 4 is installed in drilling, then will have connector sleeve
The load bar 401 of cylinder connect with harness cord screw rod 4, then punching jack 8 by bracket and thereon is passed through with connecting adding for sleeve
Carry bar 401, leveled, if 601 display device of level vial device be not up to level, by the foot screw 701 on support rod 7 into
Row leveling, if 601 display device of level vial device is horizontal, then by punching flexural pivot fixture nut 10 and with connection sleeve
Load bar 401 is attached, and starting miniature electric hydraulic pump 9 starts loading tensile, at this point, punching flexural pivot fixture nut 10 can
Effectively overcome load eccentric；Meanwhile digital displaying meter 901 shows and records all data, is passed through using the present embodiment detection device
The detection method of embodiment 1 efficiently, accurately detects the adhesive strength of superposed member faying face.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of detection method of superposed member faying face adhesion strength, which comprises the following steps:
(1) it draws reinforcing bar and is distributed grid chart；
(2) portion drills within a grid；
(3) anchoring adhesive is injected into drilling, and harness cord screw rod is inserted into hole after the completion of injecting glue；
(4) after bar planting adhesive curing, centered on harness cord screw rod, the circular groove that diameter is greater than 50~60mm of boring aperture is cut out, it is deep
Degree is greater than rear pouring concrete thickness 10mm~20mm；
(5) pull-out test is carried out.
2. the detection method of superposed member faying face adhesion strength according to claim 1, which is characterized in that the step
(1) in, pouring concrete inside reinforcement location and trend after superposed member are first positioned before drawing reinforcing bar distribution grid chart.
3. the detection method of superposed member faying face adhesion strength according to claim 1, which is characterized in that the step
(2) in, the 60~100mm of drilling depth, bottom hole pitch faying face is 3rd/3rd to eight/10ths of rear pouring concrete thickness,
Boring aperture 14mm.
4. the detection method of superposed member faying face adhesion strength according to claim 3, which is characterized in that the step
(3) in, the harness cord screw diameter 12mm, length 120mm are slowly inserted into drilling hole bottom, and cleaning is overflowed out of hole after insertion
Anchoring adhesive.
5. the detection method of superposed member faying face adhesion strength according to claim 3, which is characterized in that the step
(4) in, the ratio between the circular groove diameter and screw rod implantation depth are greater than 1.0, and depth is greater than rear pouring concrete thickness 15mm.
6. the detection method of superposed member faying face adhesion strength according to claim 1, which is characterized in that the step
(2) in, dust in cleaning eye after the completion of drilling.
7. the detection method of superposed member faying face adhesion strength according to claim 1, which is characterized in that the step
(5) in, the drill core pull-out test is loaded onto core sample and destroys, and records final marginal test value and destroys core sample height, with
This come judge core sample positive drawing adhesion strength and destroy position present position.
8. a kind of detection device of superposed member faying face adhesion strength characterized by comprising
Bracket, setting have central through hole in building surface to be measured, including cradle top surface and support rod, the cradle top surface；
Punching jack is arranged on bracket；
Miniature electric hydraulic pump is connected with punching jack, including digital displaying meter；
Punching flexural pivot fixture nut is arranged on punching jack；
The central through hole of the cradle top surface is arranged concentrically with punching jack, punching flexural pivot fixture nut, for across harness cord
Screw rod.
9. the detection device of superposed member faying face adhesion strength according to claim 8, which is characterized in that the support
Foot screw is provided on bar, for leveling bracket.
10. the detection device of superposed member faying face adhesion strength according to claim 8, which is characterized in that the branch
Top of support is provided with level vial device, is used to indicate whether device is in horizontality.
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| CN201811023433.3A CN109060653A (en) | 2018-09-03 | 2018-09-03 | Method and device for detecting bonding strength of bonding surface of laminated member |
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| CN112878986A (en) * | 2021-01-22 | 2021-06-01 | 西南石油大学 | Device and method for testing mechanical property and sealing property of cement sheath-formation interface of oil and gas well |
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| CN111896546A (en) * | 2020-07-02 | 2020-11-06 | 上海市建筑科学研究院有限公司 | New and old concrete joint surface quality detection method based on drilling and core drilling sampling |
| CN111896627A (en) * | 2020-07-02 | 2020-11-06 | 上海建科预应力技术工程有限公司 | Method for detecting quality of new and old concrete joint surface of reinforced concrete structure |
| CN112285021A (en) * | 2020-11-21 | 2021-01-29 | 泰州市金衡建筑材料检测有限公司 | Sealing material caulking cohesiveness detection device and detection method for assembly type building |
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| CN112878986A (en) * | 2021-01-22 | 2021-06-01 | 西南石油大学 | Device and method for testing mechanical property and sealing property of cement sheath-formation interface of oil and gas well |
| CN112945663A (en) * | 2021-01-27 | 2021-06-11 | 西安理工大学 | Method for detecting cohesiveness of hydraulic asphalt concrete and concrete base |
| CN112945663B (en) * | 2021-01-27 | 2022-11-25 | 西安理工大学 | Method for detecting cohesiveness of hydraulic asphalt concrete and concrete base |
| CN112964633A (en) * | 2021-03-03 | 2021-06-15 | 清远市简一陶瓷有限公司 | Method and device for testing ceramic tile bonding strength |
| CN113089824A (en) * | 2021-04-09 | 2021-07-09 | 广东电网有限责任公司 | Fabricated concrete in common environment and design method of bonding interface of fabricated concrete |
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