CN108120826A - A kind of sleeve grouting integrated experiment device and test method - Google Patents
A kind of sleeve grouting integrated experiment device and test method Download PDFInfo
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- CN108120826A CN108120826A CN201810123373.6A CN201810123373A CN108120826A CN 108120826 A CN108120826 A CN 108120826A CN 201810123373 A CN201810123373 A CN 201810123373A CN 108120826 A CN108120826 A CN 108120826A
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- grouting
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- 238000002474 experimental method Methods 0.000 title claims abstract description 19
- 238000010998 test method Methods 0.000 title claims abstract description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 84
- 229910000831 Steel Inorganic materials 0.000 claims description 50
- 239000010959 steel Substances 0.000 claims description 50
- 230000003014 reinforcing effect Effects 0.000 claims description 48
- 238000007569 slipcasting Methods 0.000 claims description 28
- 239000002002 slurry Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 24
- 238000013461 design Methods 0.000 claims description 20
- 238000004088 simulation Methods 0.000 claims description 18
- 238000012360 testing method Methods 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000010008 shearing Methods 0.000 claims description 9
- 239000011440 grout Substances 0.000 claims description 8
- 210000004911 serous fluid Anatomy 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 229920002472 Starch Polymers 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 210000003205 muscle Anatomy 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 235000013336 milk Nutrition 0.000 claims description 3
- 239000008267 milk Substances 0.000 claims description 3
- 210000004080 milk Anatomy 0.000 claims description 3
- 230000010410 reperfusion Effects 0.000 claims description 3
- 239000008107 starch Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/38—Concrete; Lime; Mortar; Gypsum; Bricks; Ceramics; Glass
- G01N33/383—Concrete or cement
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Ceramic Engineering (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Bridges Or Land Bridges (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A kind of sleeve grouting density experimental rig, including self-balancing reaction frame, two-way function jack, loading system, upper prefabricated components, lower prefabricated components, Grouting Pipe and grouting pump, the loading system includes very heavy headboard, very heavy headboard positioning bolt, upper prefabricated components positioning plate, analysis platform and video camera, the lower prefabricated components position pin by lower prefabricated components and are fixed on the bottom of self-balancing reaction frame, the upper prefabricated components positioning plate is fixed on by upper prefabricated components positioning bolt on upper prefabricated components, the very heavy headboard is fixed on by the very heavy headboard positioning bolt on the upper prefabricated components positioning plate, the upper end of the two-way function jack is fixed on by jack positioning bolt on the top of self-balancing reaction frame.The present invention provides a kind of sleeve grouting integrated experiment device and test methods, realize the detection of the grouting density of assembly concrete linkage interface and the grouting density of reinforcing steel bar connecting sleeve tube.
Description
Technical field
The present invention relates to prefabricated concrete structure technical field, more particularly, to a kind of sleeve grouting integrated experiment device
And test method.
Background technology
In building engineering field, prefabricated concrete structure is that country and building trade puted forth effort to promote a skill in recent years
Art, middle sleeve grouting interconnection technique are the main types of attachment of prefabricated concrete structure.Then, there are a variety of sets in various regions
Cartridge form and the anchoring process that is in the milk accordingly.With the application of sleeve grouting connection method in practice, also occur many
How problem wherein how to ensure the compactness of sleeve grouting, checks that the quality of such technique perplexs one of industry and asks always
The main reason for topic and such structure type are worrying in the application.The application of sleeve grouting technique mainly passes through at present
Construction technology process is controlled to ensure the quality of grouting connection, for quality postposition inspection still without good method, wherein super
The detection validity of the methods of sound wave, beam radar, X-ray is bad, in order to seek effective quality postposition detection result, so as to
The application quality of effective guarantee technique, it is quite necessary to study the working mechanism of such technique, in practical operation which
Technique can influence grouting quality, and the measure of being correspondingly improved is found out in effort.At present for the experimental study of this grouting process mechanism
Still it is in blank stage.
The content of the invention
In order to overcome existing sleeve grouting technique there are quality postposition Checking on effect it is bad the defects of, the present invention provides one
Kind sleeve grouting integrated experiment device and test method realize the grouting density and reinforcing bar of assembly concrete linkage interface
The detection of the grouting density of branch sleeve.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of sleeve is in the milk density experimental rig, including self-balancing reaction frame, two-way function jack, loading system,
Upper prefabricated components, lower prefabricated components, Grouting Pipe and grouting pump, the loading system includes very heavy headboard, very heavy headboard is determined
Position bolt, upper prefabricated components positioning plate, analysis platform and video camera, the lower prefabricated components position pin by lower prefabricated components
It is fixed on the bottom of self-balancing reaction frame, the upper prefabricated components are located at the top of the lower prefabricated components, described prefabricated
Component positioning plate is fixed on by upper prefabricated components positioning bolt on upper prefabricated components, and the very heavy headboard passes through described very heavy
Headboard positioning bolt is fixed on the upper prefabricated components positioning plate, and the two-way function jack is located at the very heavy top
The top of plate, the upper end of the two-way function jack are fixed on the top of self-balancing reaction frame by jack positioning bolt
On；
The grouting pump is connected by the Grouting Pipe with the injected hole of reinforcing steel bar connecting sleeve tube；
The upper end of reinforcing steel bar connecting sleeve tube in the upper prefabricated components and the lower end of upper prefabricated components steel bar stress are fixed and are connected
It connects, the lower end of connection reinforcing bar simulating rod is connected to lower prefabricated components steel bar stress by attaching nut pre-buried in lower prefabricated components
Upper end on, the reinforcing steel bar connecting sleeve tube is inserted into the upper end of connection reinforcing bar simulating rod through linkage interface；
The video camera by camera fixing frame be mounted on the analysis platform on, the upper prefabricated components or under it is prefabricated
Component is located at the lower section of the video camera and face above and below linkage interface and video camera.
A kind of test method of sleeve grouting density experimental rig, comprises the following steps：
The compactness experiment of linkage interface：
(1) linkage interface grouting simulation test
1.1) according to the simulation size of the actual upper prefabricated components for determining linkage interface of engineering, lower prefabricated components；
1.2) prefabricated upper prefabricated components, lower prefabricated components, upper prefabricated components, lower prefabricated components are assembly concrete structure
Part, and pay attention to the positioning of reinforcing steel bar connecting sleeve tube and the direction of injected hole and gas vent, it is answered when linkage interface is equipped with shearing resistance slot
Reserve slurries flowing groove；
1.3) after prefabricated components concrete reaches more than the 75% of design strength, component is installed on such as claim 1
On the experimental rig, upper prefabricated components carry out pre-connection contraposition with lower prefabricated components, and determine pre-buried in upper prefabricated components
Reinforcing steel bar connecting sleeve tube can be aligned completely with the connection reinforcing bar simulating rod in lower prefabricated components；
1.4) rubber washer is set in the top surface edge of lower prefabricated components, prevents the leakage of linkage interface slurries；
1.5) connection reinforcing bar simulating rod is screwed on the embedded nut of lower prefabricated components, connection reinforcing bar simulating rod has smooth
Outer surface, and the steel bar stress with being connected has identical diameter；
1.6) start the two-way function jack on top, compress upper and lower prefabricated components alignment；
1.7) injected hole of Grouting Pipe and reinforcing steel bar connecting sleeve tube is connected, opens grouting pump to reinforcing steel bar connecting sleeve tube and connection
Slurries are injected at interface, and after reinforcing steel bar connecting sleeve tube gas vent pulp, gas vent is blocked with stopper；Injected hole carries out slip casting one by one,
After treating whole injected hole slip castings, grouting under pressure is carried out in the last one injected hole, as long as the stopper of one of gas vent
It is rushed out, and gas vent will be blocked again with new stopper, slip casting terminates；
(2) linkage interface compactness is tested
2.1) to the end of linkage interface slip casting, after maintenance grout material intensity reaches design strength；Start two-way function thousand
Jin top applies pulling force to linkage interface, until linkage interface is opened；
2.2) upper prefabricated components are unloaded into installation to analysis platform, draws cavity and the contour line of crafters, and pass through
Video camera carries out set a distance camera shooting；
2.3) quantitative fine quartz sand is poured into cavity and in crafters, record pours into volume V1；
2.4) upper prefabricated components are replaced as lower prefabricated components, carry out identical camera shooting and test, record pours into volume V2；
2.1) linkage interface compactness is calculated：μ=(V-V1-V2)/V, V need reperfusion serosity total volume for interface, are shearing resistance slot
The sum of with slurries flowing groove；When shearing resistance slot and slurries flowing groove are not laid on linkage interface, can approximation take grouting pump injection connect
Border starch adhesive liquid total volume subtracts the slurry volume in all reinforcing steel bar connecting sleeve tubes.
A kind of test method of sleeve grouting density experimental rig, comprises the following steps：
Grouted density is tested in reinforcing steel bar connecting sleeve tube:
(1) reinforcing steel bar connecting sleeve tube grouting simulation test
1.1) the simulation component of reinforcing steel bar connecting sleeve tube is made by design requirement, including upper prefabricated components and lower prefabricated components,
Upper prefabricated components, lower prefabricated components are designed to have upper and lower junction steel plate, vertical type steel support is added among lower prefabricated components
Steel construction, the linkage interface of upper and lower prefabricated components becomes to be directly connected to by the junction steel plate of two components；
1.2) on the upper end junction steel plate of lower prefabricated components, beaten by the sectional dimension of members and connection reinforcement location of design
Hole is simultaneously fixedly connected with nut in lower part, configuration connection reinforcing bar simulating rod, connection reinforcing bar simulating rod insertion reinforcing steel bar connecting sleeve tube part
There is identical diameter by smooth outer surface and the steel bar stress with connecting, there is external screw thread in the lower end of connection reinforcing bar simulating rod
Match with attaching nut；
1.3) the steel bar stress position on the junction steel plate of the upper end of upper prefabricated components and two-way function jack connected end
It puts and gets through hole, screw thread, the other end and reinforcing steel bar connecting sleeve tube close-fitting are matched somebody with somebody in steel bar stress one end, connect upper end with double nut in the end of thread
It connects among steel plate folder, to adjust the length that reinforcing bar adds reinforcing steel bar connecting sleeve tube, each reinforcing steel bar connecting sleeve tube adds stress steel on linkage interface
The length of muscle is consistent；
1.4) the connection reinforcing bar simulating rod on lower prefabricated components from the attaching nut below linkage interface is screwed into, stretches out and connect
The length in border face is inserted in the seal washer of mouth under reinforcing steel bar connecting sleeve tube to be inserted into the design length of reinforcing steel bar connecting sleeve tube；It will
The upper prefabricated components decentralization of reinforcing steel bar connecting sleeve tube is installed, corresponding connection reinforcing bar simulating rod is made to be entirely insertable corresponding bar connecting
In sleeve, start two-way function jack, being further applied load compresses seal washer, and tightens each reinforcing steel bar connecting sleeve tube upper end and connect
The upper lower nut of capacity reinforcing bar makes prefabricated components, lower prefabricated components be installed in place and fixed；
1.5) by the technique of Practical Project grouting, connect each sleeve in grouting pump and Grouting Pipe or simulation Practical Project
Injected hole and gas vent are connected to one or both sides injected hole with plastic tube and three-way pipe and carry out slip casting；
1.6) grouting pump is started, injected hole carries out slip casting one by one, and exhaust is blocked with stopper after corresponding gas vent grout
Slip casting is terminated in hole after the equal grout of whole gas vents；
(2) the liquid-tight solidity test of reinforcing steel bar connecting sleeve tube entoplasm
2.1) after grouting serous fluid final set, connection reinforcing bar simulating rod is back-outed from lower prefabricated components lower end；Remove bar connecting
The connecting tube that all and injected hole of sleeve is connected.
2.2) gap on connection reinforcing bar simulating rod periphery and bubble distribution situation in reinforcing steel bar connecting sleeve tube are observed；
2.3) after slurries to be implanted reach design strength, installed in lower prefabricated components and access pressure at connection reinforcing bar simulating rod
(operating) water nozzle starts small water pump, to reinforcing steel bar connecting sleeve tube internal pressure water, by measuring the sky in press-in water reckoning reinforcing steel bar connecting sleeve tube
Gap amount, the compactness of slip casting can be expressed as in sleeve：μ '=(V '-V1′-V2')/V ', wherein V ' be reinforcing steel bar connecting sleeve tube inside
Volume, V1' for connection reinforcing bar simulating rod volume, V2' it is the water being pressed into；
If the closely knit situation of reinforcing steel bar connecting sleeve tube grouting need to be further looked at, upper prefabricated components can be moved to analysis platform,
It cut, dissected, distribution and the quantity of its bubble are analyzed by camera photography.
Beneficial effects of the present invention are mainly manifested in：The grouting density of assembly concrete linkage interface and reinforcing bar are connected
The grouting density experiment of female connector cylinder is incorporated into set of device；It is non-that the grouting of concrete component linkage interface is estimated by sand replacement method
The volume of dense region；The voidage in reinforcing steel bar connecting sleeve tube is measured using setting-out, is filled so as to analyze reinforcing steel bar connecting sleeve tube
The density of slurry.
Description of the drawings
Fig. 1 is the structure diagram of the experimental rig of the present invention.
Fig. 2 is linkage interface compactness analysis platform schematic diagram.
Fig. 3 is the linkage interface top view of lower prefabricated components.
Fig. 4 is the linkage interface bottom view of upper prefabricated components.
Fig. 5 is reinforcing steel bar connecting sleeve tube compactness of grouting experimental rig schematic diagram.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
With reference to Fig. 1~Fig. 5, a kind of sleeve grouting density experimental rig, including self-balancing reaction frame 4, two-way function thousand
Jin top 5, loading system, upper prefabricated components 3, lower prefabricated components 1, Grouting Pipe 20 and grouting pump 19, the loading system include thousand
Jin headboard 8, very heavy headboard positioning bolt 9, upper prefabricated components positioning plate 10, analysis platform and video camera 21, it is described lower pre-
Component 1 processed positions pin 6 by lower prefabricated components and is fixed on the bottom of self-balancing reaction frame 4, and the upper prefabricated components 3 are located at
The top of the lower prefabricated components 1, the upper prefabricated components positioning plate 10 are fixed on by upper prefabricated components positioning bolt 11
On prefabricated components 3, the very heavy headboard 8 is fixed on the upper prefabricated components by the very heavy headboard positioning bolt 9 to be determined
On the plate 10 of position, the two-way function jack 5 is located at the top of the very heavy headboard 8, the two-way function jack 5 it is upper
End is fixed on by jack positioning bolt 7 on the top of self-balancing reaction frame 4；
The grouting pump 19 is connected by the Grouting Pipe 20 with the injected hole 18 of reinforcing steel bar connecting sleeve tube 13；
The upper end of reinforcing steel bar connecting sleeve tube 13 in the upper prefabricated components 3 and the lower end of upper prefabricated components steel bar stress 12 are consolidated
Fixed connection, the lower end of connection reinforcing bar simulating rod 14 are connected to down prefabricated structure by attaching nut 15 pre-buried in lower prefabricated components 1
On the upper end of part steel bar stress 16, the reinforcing steel bar connecting sleeve tube is inserted into the upper end of connection reinforcing bar simulating rod 14 through linkage interface 2
13；
The video camera 21 fixes 22 framves on the analysis platform by video camera, the upper prefabricated components 3 or
Lower prefabricated components 1 are located at the lower section of the video camera 21 and linkage interface 2 and video camera face about 21.
The invention aims to be directed to prefabricated concrete structure connection mode --- --- reinforced bar sleeve grouting connection side
The mechanism of formula is studied, and main research contents includes the test simulation of the forming process of technical process, is found out close with grouting
The affecting laws of the relevant each factor of reality, so as to find out the key technology for improving grouting density, so as to find out effective filling
Starch the postposition detection technique of quality.
The experimental rig design principle of the present invention is the experiment theory of similarity, according to the basic demand of the theory of similarity, combined cover
Slurry tank, keyway, sleeve on linkage interface etc. is carried out mould by the process characteristic of cylinder grouting by common entity component connection
Intend, meanwhile, in concrete prefabricated element also using the concrete of prototype and grouting slurry material, establish physical test model.Its
Middle reinforcing steel bar connecting sleeve tube uses two kinds of fundamental types of prototype and transparent sleeve, and grouting process uses prototype process and equipment；Connection
Interface side pieces length uses analog simulation mode, shortens structure as far as possible under the conditions of the grouting for not influencing linkage interface is simulated
Part, gravity deficiency part are simulated using imposed load mode.
The density of sleeve grouting actual measurement by way of opening model, wherein for closely knit on linkage interface
Property, after directly linkage interface is pulled open, measurement cavity, bubble are realized in equal volume, and density is covered also by incision in sleeve
Density is surveyed after cylinder.Different factors are surveyed respectively to Grouted density by changing the parameters such as sleeve type, grouting process
It influences.
By changing the placement direction of experimental rig, the linkage interface of different primary structure members can be simulated.
The present invention is to determine according to problem to be solved to find out the grouting serous fluid of linkage interface and reinforcing steel bar connecting sleeve tube
Flowing law and slip casting density evaluation method, in order to find out the flowing law of grouting serous fluid, by linkage interface in Practical Project
Joining Technology simulated be introduced into experiment in, for this purpose, having developed the experimental rig such as Fig. 1.
Experimental rig is mainly by steel self-balancing reaction frame 4, upper prefabricated components 3, lower prefabricated components 1, linkage interface and phase
The grouting equipment composition answered.For the convenience of experiment, do not use full-scale prefabricated components under study for action, but only press member section
Consider by full scale model, and a part is only taken on component length, in order to simulate the influence of the gravity in Practical Project and connection
Interface it is easy for installation, be configured with two-way function jack 5 and the corresponding loading system for compressing and pulling open interface.Utilize this dress
Experimental Comparison can be carried out to the grouting way of different reinforcing steel bar connecting sleeve tubes by putting, and analyze different sleeves and slurries and slurries are flowed
Influence, experiment every time need to only convert the prefabricated components of simulation.
In order to analyze the slip casting situation of linkage interface, an analysis platform such as attached drawing 2 is also set, will be pulled open thereon after experiment
Linkage interface is fixed respectively, is recorded cavity and the bubble distribution at interface with fixed camera shooting mode, and is measured its volume；It simultaneously can be with
Reinforced bar sleeve from component is taken out, test analysis individually is carried out to its slip casting density.
The specific testing program of the present invention is as follows：
1. the compactness experiment at generic connectivity interface
The present apparatus can carry out the Grouted density experiment under the conditions of a variety of linkage interfaces, can mainly have column-column, column-beam,
The grouting interface compactness experiment of the linkage interfaces such as beam-beam, wall-wall, wall-beam.By taking column-column linkage interface as an example, illustrate its examination
Proved recipe case：
(1) linkage interface grouting test
1.1) according to the actual simulation size for determining column of engineering, section prototype (such as rectangular column a is first selected as far as possible
× b), the moulded dimension >=b in column length direction, under normal circumstances, component length size are a length of to be more than 1.5 times of reinforced bar sleeves
Preferably.
1.2) by project blue print prefabricated assembled concrete component, pay attention to reinforcing steel bar connecting sleeve tube positioning and injected hole and
The direction of gas vent should reserve slurries flowing groove 25, such as attached drawing 4 when linkage interface is equipped with shearing resistance slot 24.
1.3) after prefabricated components concrete reaches more than the 75% of design strength, component is installed on experimental rig,
Upper and lower prefabricated components carry out pre-connection contraposition, reinforcing steel bar connecting sleeve tube 13 pre-buried in the prefabricated components 3 prefabricated structure under on determining
Connection reinforcing bar simulating rod in part 1 can carry out experiment after being aligned completely.
1.4) rubber washer 23 is set in the top surface edge of lower prefabricated components 1, prevents the leakage of linkage interface slurries, such as schemed
3；Gasket thickness is more than the grouting thickness requirement at prefabricated components interface, under normal circumstances not small 25mm.
1.5) connection reinforcing bar simulating rod 14 is screwed on the pre-buried attaching nut 15 of lower prefabricated components, connects reinforcing bar simulating rod
14 by with smooth outer surface, and the steel bar stress with being connected has identical diameter.
1.6) start top two-way function jack 5, compress upper and lower prefabricated components alignment, two-way function jack
Loaded value is conducted oneself with dignity by the column of design upper component to be determined, the difference that actual prefabricated post is conducted oneself with dignity and model prefabricated post is heavy is taken to be used as and is vertically applied
Loading carries.
1.7) Grouting Pipe 20 with the injected hole 18 of reinforcing steel bar connecting sleeve tube 13 is connected, opens grouting pump 19 to reinforced bar jointing sleeve
Cylinder 13 and linkage interface 2 inject slurries, and after 17 pulp of reinforcing steel bar connecting sleeve tube gas vent, gas vent is blocked with stopper；It notes one by one
It starches hole and carries out slip casting, after treating whole 18 slip castings of injected hole, grouting under pressure is carried out in the last one injected hole, as long as wherein one
The stopper of a gas vent is rushed out, and will block gas vent 17 again with new stopper, and slip casting terminates.
(2) linkage interface compactness is tested
2.1) to the end of 2 slip casting of linkage interface, after maintenance grout material intensity reaches design strength, it is close to carry out linkage interface
Solidity is tested；Start two-way function jack 5 and pulling force is applied to linkage interface, until linkage interface is opened.
2.2) upper prefabricated components 3 are unloaded into installation to analysis platform, draws cavity and the contour line of crafters, and pass through
Video camera carries out set a distance camera shooting；
2.3) quantitative fine quartz sand is poured into cavity and in crafters, record pours into volume V1。
2.4) upper prefabricated components 3 are replaced as lower prefabricated components 1, carry out identical camera shooting and test, record pours into volume
V2。
2.5) linkage interface compactness is calculated：μ=(V-V1-V2)/V, V need reperfusion serosity total volume for interface, are shearing resistance slot
The sum of with grouting serous fluid flowing groove；When connect boundary on do not lay shearing resistance slot and slurries flowing groove when, can approximation grouting pump is taken to inject
Linkage interface slurries total volume subtracts the slurry volume in all reinforcing steel bar connecting sleeve tubes.
2. Grouted density is tested in reinforcing steel bar connecting sleeve tube
It can simply be transformed by the device of attached drawing 1 specifically for the device of reinforcing steel bar connecting sleeve tube Grouted density experiment,
Reaction frame, jack and the grouting pump and grouting pipeline of device are constant, and simply simulation component 1 and component 3 are transformed into for steel
The simulation component of muscle sleeve.Specific testing program is as follows：
(1) reinforcing steel bar connecting sleeve tube grouting simulation test
1.1) the upper and lower simulation component of bar connecting is made by design requirement, for being filled specifically for reinforcing steel bar connecting sleeve tube
Compaction test is starched, the concrete in component can not be simulated, and simulated object is directly set as reinforcing steel bar connecting sleeve tube, for convenience
Upper and lower prefabricated components can be designed to have upper and lower junction steel plate, in lower prefabricated components by the installation and test of experiment process
Between plus vertical type steel support 26 steel construction, the linkage interface of upper and lower prefabricated components becomes by the straight of the junction steel plate of two components
It connects in succession, as shown in Figure 5.
1.2) on the upper end junction steel plate of lower prefabricated components 1, sectional dimension of members and the stress that is connected by design
Reinforcement location, such as Fig. 3 punch and nut are fixedly connected in lower part, configuration connection reinforcing bar simulating rod, simulating rod insertion reinforced bar sleeve
Part has identical diameter by smooth outer surface and with connection steel bar stress, and there is outer spiral shell in the lower end of connection reinforcing bar simulating rod
Line and the attaching nut of junction steel plate lower part match.
1.3) steel bar stress on the junction steel plate of the upper end of upper prefabricated components 3 and 5 connected end of two-way function jack
Hole is got through in position, and screw thread is matched somebody with somebody in steel bar stress one end, and the other end is connected with reinforcing steel bar connecting sleeve tube tight fit, matches somebody with somebody double nut in the end of thread
Among upper end junction steel plate is pressed from both sides, to adjust the length that steel bar stress adds reinforcing steel bar connecting sleeve tube, each bar connecting on linkage interface
Sleeve adds the length of steel bar stress to be consistent.
1.4) the connection reinforcing bar simulating rod on lower prefabricated components 1 from the attaching nut below linkage interface is screwed into, stretched out
The length of linkage interface 2 is inserted in the seal washer of mouth under reinforcing steel bar connecting sleeve tube to be inserted into the design length of reinforcing steel bar connecting sleeve tube
27；The upper prefabricated components for installing reinforcing steel bar connecting sleeve tube are transferred, corresponding connection reinforcing bar simulating rod is made to be entirely insertable corresponding steel
In muscle branch sleeve, start two-way function jack, being further applied load compresses seal washer, and tightens each reinforcing steel bar connecting sleeve tube
Upper end connects the upper lower nut of steel bar stress, and upper and lower prefabricated components is made to be installed in place and fixed.
1.5) by the technique of Practical Project grouting, grouting pump and external Grouting Pipe are connected.Also can simulate will in Practical Project
Each reinforcing steel bar connecting sleeve tube injected hole and gas vent are connected to one or both sides injected hole with plastic tube and three-way pipe and carry out slip casting.
1.6) grouting pump is started, injected hole carries out slip casting one by one, and exhaust is blocked with stopper after corresponding gas vent grout
Slip casting is terminated in hole after the equal grout of whole gas vents.
(2) the liquid-tight solidity test of reinforcing steel bar connecting sleeve tube entoplasm
2.1) after grouting serous fluid final set, connection reinforcing bar simulating rod is carefully back-outed from lower prefabricated components lower end；Remove reinforcing bar
All plastic tubes and three-way pipe of branch sleeve.
2.2) gap on connection reinforcing bar simulating rod periphery and bubble distribution situation in reinforced bar sleeve are observed；
2.3) after slurries to be implanted reach design strength, installed in lower prefabricated components and access pressure at connection reinforcing bar simulating rod
(operating) water nozzle starts small water pump, to reinforcing steel bar connecting sleeve tube internal pressure water, by measuring the sky in press-in water reckoning reinforcing steel bar connecting sleeve tube
Gap amount, the compactness of slip casting can be expressed as in sleeve：μ '=(V '-V1′-V2')/V ', wherein V ' be reinforcing steel bar connecting sleeve tube inside
Volume, V1' for connection reinforcing bar simulating rod volume, V2' it is the water being pressed into.
2.4) need the closely knit situation for further looking at reinforced bar sleeve grouting that upper member can be moved to analysis platform, further
It cut, dissected, distribution and the quantity of its bubble are analyzed by camera photography.
Claims (3)
- The density experimental rig 1. a kind of sleeve is in the milk, it is characterised in that：Including self-balancing reaction frame, two-way function jack, Loading system, upper prefabricated components, lower prefabricated components, Grouting Pipe and grouting pump, the loading system include very heavy headboard, very heavy Headboard positioning bolt, upper prefabricated components positioning plate, analysis platform and video camera, the lower prefabricated components pass through lower prefabricated components Positioning pin is fixed on the bottom of self-balancing reaction frame, and the upper prefabricated components are located at the top of the lower prefabricated components, institute It states prefabricated components positioning plate to be fixed on upper prefabricated components by upper prefabricated components positioning bolt, the very heavy headboard passes through The very heavy headboard positioning bolt is fixed on the upper prefabricated components positioning plate, and the two-way function jack is located at described The top of very heavy headboard, the upper end of the two-way function jack are fixed on self-balancing reaction frame by jack positioning bolt Top on；The grouting pump is connected by the Grouting Pipe with the injected hole of reinforcing steel bar connecting sleeve tube；The upper end of reinforcing steel bar connecting sleeve tube in the upper prefabricated components is fixedly connected with the lower end of upper prefabricated components steel bar stress, even The lower end for connecing reinforcing bar simulating rod is connected to the upper of lower prefabricated components steel bar stress by attaching nut pre-buried in lower prefabricated components On end, the reinforcing steel bar connecting sleeve tube is inserted into the upper end of connection reinforcing bar simulating rod through linkage interface；The video camera is mounted on by camera fixing frame on the analysis platform, the upper prefabricated components or lower prefabricated components Positioned at the lower section of the video camera and linkage interface and face above and below video camera.
- 2. a kind of test method of sleeve grouting density experimental rig as described in claim 1, it is characterised in that：Including with Lower step：The compactness experiment of linkage interface：(1) linkage interface grouting simulation test1.1) according to the simulation size of the actual upper prefabricated components for determining linkage interface of engineering, lower prefabricated components；1.2) prefabricated upper prefabricated components, lower prefabricated components, upper prefabricated components, lower prefabricated components are assembly concrete component, And pay attention to the positioning of reinforcing steel bar connecting sleeve tube and the direction of injected hole and gas vent, it should be reserved when linkage interface is equipped with shearing resistance slot Slurries flowing groove；1.3) after prefabricated components concrete reaches more than the 75% of design strength, component is installed on as described in claim 1 Experimental rig on, upper prefabricated components and lower prefabricated components carry out pre-connection contraposition, and determine steel pre-buried in upper prefabricated components Muscle branch sleeve can be aligned completely with the connection reinforcing bar simulating rod in lower prefabricated components；1.4) rubber washer is set in the top surface edge of lower prefabricated components, prevents the leakage of linkage interface slurries；1.5) connection reinforcing bar simulating rod is screwed on the pre-buried attaching nut of lower prefabricated components, connection reinforcing bar simulating rod has smooth Outer surface, and the steel bar stress with being connected has identical diameter；1.6) start the two-way function jack on top, compress upper and lower prefabricated components alignment；1.7) injected hole of Grouting Pipe and reinforcing steel bar connecting sleeve tube is connected, opens grouting pump to reinforcing steel bar connecting sleeve tube and linkage interface Slurries are injected, after reinforcing steel bar connecting sleeve tube gas vent pulp, gas vent is blocked with stopper；Injected hole carries out slip casting one by one, treats complete After portion's injected hole slip casting, grouting under pressure is carried out in the last one injected hole, as long as the stopper of one of gas vent is rushed Go out, and gas vent will be blocked again with new stopper, slip casting terminates；(2) linkage interface compactness is tested2.1) to the end of linkage interface slip casting, after maintenance grout material intensity reaches design strength；Start two-way function jack Pulling force is applied to linkage interface, until linkage interface is opened；2.2) upper prefabricated components are unloaded into installation to analysis platform, draws cavity and the contour line of crafters, and pass through camera shooting Machine carries out set a distance camera shooting；2.3) quantitative fine quartz sand is poured into cavity and in crafters, record pours into volume V1；2.4) upper prefabricated components are replaced as lower prefabricated components, carry out identical camera shooting and test, record pours into volume V2；2.1) linkage interface compactness is calculated：μ=(V-V1-V2)/V, V need reperfusion serosity total volume for interface, are shearing resistance slot and slurry The sum of liquid flowing groove；When shearing resistance slot and slurries flowing groove are not laid on linkage interface, can approximation take grouting pump injection connection circle Starch adhesive liquid total volume subtracts the slurry volume in all reinforcing steel bar connecting sleeve tubes.
- 3. a kind of test method of sleeve grouting density experimental rig as described in claim 1, it is characterised in that：Including with Lower step：Grouted density is tested in reinforcing steel bar connecting sleeve tube:(1) reinforcing steel bar connecting sleeve tube grouting simulation test1.1) the simulation component of reinforcing steel bar connecting sleeve tube is made by design requirement, it, will be upper including upper prefabricated components and lower prefabricated components Prefabricated components, lower prefabricated components are designed to have upper and lower junction steel plate, and the steel of vertical type steel support is added among lower prefabricated components Structure, the linkage interface of upper and lower prefabricated components become to be directly connected to by the junction steel plate of two components；1.2) on the upper end junction steel plate of lower prefabricated components, sectional dimension of members and the steel bar stress position that is connected by design It puts and punches and be fixedly connected in lower part nut, configuration connection reinforcing bar simulating rod, connection reinforcing bar simulating rod insertion reinforcing steel bar connecting sleeve tube Part has identical diameter for smooth outer surface and with the steel bar stress of the connection, and the lower end of connection reinforcing bar simulating rod has External screw thread matches with attaching nut；1.3) the steel bar stress position on the junction steel plate of the upper end of upper prefabricated components and two-way function jack connected end is beaten Through hole, steel bar stress one end match somebody with somebody screw thread, the other end and reinforcing steel bar connecting sleeve tube close-fitting, upper end are connected steel with double nut in the end of thread Among plate folder, to adjust the length that reinforcing bar adds reinforcing steel bar connecting sleeve tube, each reinforcing steel bar connecting sleeve tube adds steel bar stress on linkage interface Length is consistent；1.4) the connection reinforcing bar simulating rod on lower prefabricated components from the attaching nut below linkage interface is screwed into, stretches out connection circle The length in face is inserted in the seal washer of mouth under reinforcing steel bar connecting sleeve tube to be inserted into the design length of reinforcing steel bar connecting sleeve tube；It will install The upper prefabricated components decentralization of reinforcing steel bar connecting sleeve tube makes corresponding connection reinforcing bar simulating rod be entirely insertable corresponding reinforcing steel bar connecting sleeve tube It is interior, start two-way function jack, being further applied load compresses seal washer, and tighten the connection of each reinforcing steel bar connecting sleeve tube upper end by The upper lower nut of power reinforcing bar makes prefabricated components, lower prefabricated components be installed in place and fixed；1.5) by the technique of Practical Project grouting, connect each sleeve slip casting in grouting pump and Grouting Pipe or simulation Practical Project Hole and gas vent are connected to one or both sides injected hole with plastic tube and three-way pipe and carry out slip casting；1.6) grouting pump is started, injected hole carries out slip casting one by one, blocks gas vent with stopper after corresponding gas vent grout, treats Terminate slip casting after whole equal grouts of gas vent；(2) the liquid-tight solidity test of reinforcing steel bar connecting sleeve tube entoplasm2.1) after grouting serous fluid final set, connection reinforcing bar simulating rod is back-outed from lower prefabricated components lower end；Remove reinforcing steel bar connecting sleeve tube All connecting tubes being connected with injected hole.2.2) gap on connection reinforcing bar simulating rod periphery and bubble distribution situation in reinforcing steel bar connecting sleeve tube are observed；2.3) after slurries to be implanted reach design strength, access pressure water spray at connection reinforcing bar simulating rod is installed in lower prefabricated components Mouth starts small water pump, to reinforcing steel bar connecting sleeve tube internal pressure water, by measuring the gap in press-in water reckoning reinforcing steel bar connecting sleeve tube It measures, the compactness of slip casting can be expressed as in sleeve：μ '=(V '-V1′-V2')/V ', wherein V ' be reinforcing steel bar connecting sleeve tube inner bulk Product, V1' for connection reinforcing bar simulating rod volume, V2' it is the water being pressed into；If the closely knit situation of reinforcing steel bar connecting sleeve tube grouting need to be further looked at, upper prefabricated components can be moved to analysis platform, carried out Cutting dissects, and distribution and the quantity of its bubble are analyzed by camera photography.
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