CN207851072U - Characteristic of crack and its simulator that overlay is influenced between a kind of broken block - Google Patents
Characteristic of crack and its simulator that overlay is influenced between a kind of broken block Download PDFInfo
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- CN207851072U CN207851072U CN201820352290.XU CN201820352290U CN207851072U CN 207851072 U CN207851072 U CN 207851072U CN 201820352290 U CN201820352290 U CN 201820352290U CN 207851072 U CN207851072 U CN 207851072U
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Abstract
The utility model proposes characteristic of crack between a kind of broken block and its on the simulator that overlay influences, including environmental cabinet, the lower part of environmental cabinet is equipped with pedestal, and the middle part of pedestal is equipped with the composite layer test specimen in prefabricated crack, Constrained frame is arranged on composite layer test specimen；The both sides of composite layer test piece lower part are equipped with horizontal direction loading device, the top of composite layer test specimen is equipped with overlay loading device and rainfall simulator, the lower part of overlay loading device is fixed on pedestal, and horizontal direction loading device, rainfall simulator and overlay loading device are connected with acquisition control system.The influences of the factors coupling to composite construction such as the utility model energy simulated driving load, temperature and water；Top overlay crack developing can be carried out really close to simulation crack form between the mutual embedded squeezing power of block and block, the cracking resistance and road engineering Old cement concrete improvement and design for crushed stone technology provide technical support and accumulation.
Description
Technical field
The utility model is related to the technical fields of road engineering, mainly Deteriorated concrete pavement road reformation, more particularly to
Characteristic of crack and its simulator influenced on overlay, broken for simulating and evaluating cement mixed mud between a kind of broken block
Influence of the crack form for top asphalt overlay crack developing between embedded squeezing snap-in force and block between block.
Background technology
Cement concrete pavement is one of the important form of China's pavement structure.The traffic shape of current sharp increase in China
Under condition, cement concrete pavement starts the serious destruction of large area occurred, for cement concrete pavement reparation with change
It is the task of top priority to make.Rubblization technology of cement concrete pavement can effectively inhibit the appearance of crack on road.
Currently, the existing cement concrete pavement in China due to during use overload, maintenance is insufficient the problems such as, have phase
When a part already close to or be more than its design period, more and more Old cement concretes are faced with repair.
And not only road-ability is preferable for bituminous paving, and it is repaired and is easy compared with cement concrete pavement, thus in old coagulating cement
Repaving asphalt coat is a kind of effective measures improving its performance on soil surface.
The destruction of Asphalt Concrete Overlay is mainly since Old cement concrete crack or seam are this original scarce
The presence for falling into and destroying, causes the stress concentration and internal injury of Asphalt Concrete Overlay, the main performance shape of this damage
Formula is exactly asphalt overlay crack.Crack on road can not only influence road-ability, but also road table can be caused to soak under water, influence
The stabilized soil pavement of roadbed.What is more important, in the influence of traffic load repeated action and cyclically-varying environment temperature
Under, usually so that crack extends rapidly around, substantially reduce the service life of asphalt surface course.
There is crack problem for the asphalt overlay in rebuilding old road, still lacks comprehensive test method and reliable at present
Evaluation index, can not systematically restore under actual condition embedded squeezing power and crack form between cement concrete block and top is overlayed
The influence of layer.
Utility model content
For it can not further investigate and simulate cement concrete pavement breaking after, crack between the mutual embedded squeezing power of block and block
The technical issues of form influences top overlay crack developing, the utility model proposes characteristic of crack between a kind of broken block and
Its simulator that overlay is influenced, for crack form between embedded squeezing power and block between cement concrete block of simulating and grade
Influence to top overlay crack developing；How to break and press to evaluate by Crack growth rate, strain and bursting stress
How road machine rolls to reduce the development in overlay crack, and technical support and accumulation are provided for Practical Project.
In order to achieve the above object, the technical solution of the utility model is realized in：Crack between a kind of broken block
The lower part of characteristic and its simulator influenced on overlay, including environmental cabinet, the environmental cabinet is equipped with pedestal, the middle part of pedestal
Composite layer test specimen equipped with prefabricated crack is arranged Constrained frame on composite layer test specimen；The both sides of the composite layer test piece lower part are set
There are horizontal direction loading device, the top of composite layer test specimen to be equipped with overlay loading device and rainfall simulator, overlay adds
The lower part set is carried to be fixed on pedestal, horizontal direction loading device, rainfall simulator and overlay loading device with adopt
Collection control system is connected.
The composite layer test specimen includes prefabricated cracked concrete beam and Asphalt Concrete Overlay equipped with prefabricated crack, drip
Green concrete overlay is arranged on the top of prefabricated cracked concrete beam；The top of the Asphalt Concrete Overlay is equipped with strain
Piece, foil gauge are arranged in the lower section of overlay loading device, and foil gauge is connected with acquisition control system.
The prefabricated crack is the shapes cracks such as Vertical Cracks, diagonal crack or " V " font
The constraint frame is upper and lower surface opening, the transparent and dismountable framework of the lower openings of both side surface.
The horizontal direction loading device includes horizontal power system, connecting cross beam, load plate and lateral load sensor,
Load plate is vertically arranged in the both sides of prefabricated cracked concrete beam, and load plate is connected with connecting cross beam, connecting cross beam and level
Dynamical system is connected；The connecting cross beam is equipped with lateral load sensor, lateral load sensor and acquisition control system
It is connected.
The overlay loading device includes rack platform, column, trunnion axis, cross bar, vertical load sensor, vertically adds
It carries axis and loading wheel, the lower part of column is fixed on pedestal, the top of column is fixed with trunnion axis, and trunnion axis passes through sliding block and branch
Body panel is connected, and rack platform is equipped with horizontal drive mechanism and vertical load maintainer；Vertical load maintainer is with setting in water
Cross bar below flat axis is connected, and the lower part of cross bar is fixed with vertical loading axis, and the lower removable of vertical loading axis, which is connected with, to be added
Wheel is carried, vertical load sensor is arranged in vertical loading axis, and vertical load sensor is connected with acquisition control system.
The horizontal drive mechanism includes prime mover, link mechanism and acceleration sensor, and prime mover is connected with link mechanism
It connects, link mechanism is connected with one end of rack platform, and acceleration sensor is arranged on link mechanism, and prime mover and acceleration sense
Device is connected with acquisition control system；The both ends of the trunnion axis are equipped with the limit for limiting bracket plateau levels moving range
Position spring.
The vertical load maintainer includes gravitational load device, guide post and jack, jack and is matched with guide post
Guide sleeve is fixed on rack platform, and gravitational load device is fixed on the top of guide post, and jack is located in the middle part of gravitational load device
Lower section；The lower part of guide post is fixedly connected with cross bar.
The rainfall simulator includes aqueduct, pressure sensor, air compressor machine, water tank and outlet pipe, aqueduct and
Air compressor machine is connected with water tank, and aqueduct is connected with outlet pipe, and outlet pipe is arranged across rack platform in loading wheel
Top；It is equipped with pressure sensor between the air compressor machine and water tank, pressure sensor and air compressor machine are and acquisition control system
It is connected.
The beneficial effects of the utility model：Not only simulate influence of the environment temperature for test specimen, it is also contemplated that precipitation
Effect, the influences of the factors coupling to composite construction such as energy simulated driving load, temperature and water；Can simulate different speeds and
Effect of the not coaxial carrier vehicle for overlay；Have a wide range of application, the composite construction of experiment may exist different crackle forms
And different preceding crowded snap-in forces, the sandwich of experiment can change；It can be split between the mutual embedded squeezing power of block and block
Slit formula carries out really close to simulation top overlay crack developing, the cracking resistance for crushed stone technology and the old cement of road engineering
Concrete road surface improvement and design provides technical support and accumulation.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural schematic diagram that the utility model constrains frame.
Wherein, 1, prime mover；2, link mechanism；3, acceleration transducer；4, gravitational load device；5, guide post；6, very heavy
Top；7, rack platform；8, aqueduct；9, pressure sensor；10, air compressor machine；11, water tank；12, limit spring；13, horizontal
Axis；14, cross bar；15, outlet pipe；16, vertical loading axis；17, vertical load sensor；18, loading wheel；19, frame is constrained；20、
Asphalt Concrete Overlay；21, prefabricated cracked concrete beam；22, foil gauge；23, prefabricated crack；24, lateral load sensor；
25, connecting cross beam；26, horizontal power system；27, pedestal；28, acquisition control system；29, environmental cabinet；30, load plate；31, it stands
Column.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not under the premise of making the creative labor
The every other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figure 1, characteristic of crack and its simulator that overlay is influenced between a kind of broken block, including environmental cabinet
29, the lower part of the environmental cabinet 29 is equipped with pedestal 27, and the middle part of pedestal 27 is equipped with the composite layer test specimen in prefabricated crack, composite layer examination
Constrained frame 19 is arranged on part；The both sides of the composite layer test piece lower part are equipped with horizontal direction loading device, composite layer test specimen
Top is equipped with overlay loading device and rainfall simulator, and the lower part of overlay loading device is fixed on pedestal 27, horizontal
Direction loading device, rainfall simulator and overlay loading device are connected with acquisition control system 28.Horizontal direction adds
It carries to set and can act on composite layer test specimen simultaneously with overlay loading device, but the two is independent of each other.Acquisition control system 28 is logical
Acceleration, lateral and vertical magnitude of load and water the flow velocity for measuring horizontal movement are crossed, it is real to adjust corresponding power-equipment
Now corresponding control.Temperature control equipment is provided in environmental cabinet 29, temperature control equipment includes refrigeration machine and heating combined equipment, system
The top in environmental cabinet 29 is arranged in cold, and the lower part in environmental cabinet 29 is arranged in heating combined equipment.Temperature control equipment can be with mould
The operating mode of quasi- different temperatures includes the operating mode of severe cold frost and scorching temperature.
The composite layer test specimen includes prefabricated cracked concrete beam 21 and bituminous concrete overlay equipped with prefabricated crack 23
Layer 20, Asphalt Concrete Overlay 20 is arranged on the top of prefabricated cracked concrete beam 21；The Asphalt Concrete Overlay 20
Top be equipped with foil gauge 22, foil gauge 22 is arranged in the lower section of overlay loading device, foil gauge 22 and acquisition control system
28 are connected, and foil gauge 22 incudes the adaptability to changes that top overlay loading device acts on it and transmits an acquisition control system
28。
The production method of the composite layer test specimen is：First joints cement beams of concrete waits for that cement concrete beam reaches maintenance
After age, to being cut to obtain prefabricated crack 23 in the middle part of cement concrete beam, the prefabricated crack 23 is common vertical
The shapes cracks such as crack, diagonal crack or " V " font；The middle part for being sticked to pedestal 27 with epoxy adhesive after cutting forms examination
Constraint frame 19 is fixed on test specimen by part；Loading force of the horizontal direction loading device to broken cement concrete layer both sides is set
Size loads the cement concrete both sides behind cutting crack, simulates block embedded squeezing power, stablizes 1h, wait for its adaptive rank
Duan Wending；The uniform spread priming oil in the top of cement concrete after cutting crack again stands the examination of 2h shape semi-finished product in room temperature
Part；The Asphalt mixture pavement mixed and stirred is formed into overlay on semi-finished product test specimen later, dress is loaded with the overlay on top
The loading wheel set rolls semi-finished product test specimen, and a direction was rolled 2 times before this, continues compacting 24 times after being rotated by 90 °, later
The test specimen is placed at room temperature for 48h, and pastes three foil gauges 22 in the middle part of overlay, the sample preparation of composite layer test specimen finishes.
As shown in Fig. 2, the constraint frame 19 can for the transparent of lower openings of upper and lower surface opening, both side surface
The framework of dismounting.The front surface and rear surface for constraining frame 19 are entities, can be limited to composite layer test specimen.Constrain frame 19
The more actual condition of closing to reality road surface surrounding constraint, constraint frame 19 mainly play the Asphalt Concrete Overlay on top 20
The effect of fixed constraint, it is transparent to change so as to the crack of Asphalt Concrete Overlay 20 during observation experiment.
The horizontal direction loading device includes horizontal power system 26, connecting cross beam 25, load plate 30 and lateral load
Sensor 24, load plate 30 are vertically arranged in the both sides of prefabricated cracked concrete beam 21, load plate 30 and 19 two sides of constraint frame
Opening match, do not influence to constrain frame 19 limit of composite layer test specimen constrained.Load plate 30 is connected with connecting cross beam 25,
Connecting cross beam 25 is connected with horizontal power system 26；The connecting cross beam 25 is equipped with lateral load sensor 24, lateral lotus
Set sensor 24 is connected with acquisition control system 28.Horizontal direction loading device can be to being crushed coagulating cement by load plate 30
Soil layer keeps applying stable power, to ensure to simulate the embedded squeezing power between prefabricated 21 block of cracked concrete beam.
The overlay loading device includes rack platform 7, column 31, trunnion axis 13, cross bar 14, vertical load sensor
17, the lower part of vertical loading axis 16 and loading wheel 18, column 31 is fixed on pedestal 27, and the top of column 31 is fixed with trunnion axis
13, trunnion axis 13 is connected by sliding block with rack platform 7, and trunnion axis 13 is used as horizontal slide, rack platform 7 to be slidably connected to
The top of trunnion axis 13.Rack platform 7 is equipped with horizontal drive mechanism and vertical load maintainer；Vertical load maintainer exists with setting
The cross bar 14 of 13 lower section of trunnion axis is connected, and the lower part of cross bar 14 is fixed with vertical loading axis 16, the lower part of vertical loading axis 16
Be connected with loading wheel 18, vertical load sensor 17 is arranged in vertical loading axis 16, vertical load sensor 17 with adopt
Collection control system 28 is connected.
The horizontal drive mechanism includes prime mover 1, link mechanism 2 and acceleration sensor 3, prime mover 1 and link mechanism 2
It is connected, link mechanism 2 is connected with one end of rack platform 7, and acceleration sensor 3 is arranged on link mechanism 2, prime mover 1
It is connected with acquisition control system 28 with acceleration sensor 3；The both ends of the trunnion axis 13, which are equipped with, is used for limiting bracket platform 7
The limit spring 12 of horizontal moving ranges prevents the loading wheel 18 under the drive of rack platform 7 from removing composite layer test specimen, increases
The reliability of whole device.It drives rack platform 7 to move reciprocatingly in the horizontal direction by link mechanism 2 by prime mover 1, passes through
Acceleration transducer 3 measures the translational acceleration of rack platform 7, and acquisition control system 28 controls prime mover 1 and controls speed, come
Simulate effect of the different speeds for road surface.
The vertical load maintainer includes gravitational load device 4, guide post 5 and jack 6, jack 6 and with 5 phase of guide post
The guide sleeve matched is fixed on rack platform 7, and gravitational load device 4 is fixed on the top of guide post 5, lower part and the cross bar 14 of guide post 5
It is fixedly connected.Gravity laod device 4 is connected across rack platform 7 with cross bar 14 by two guide posts 5, on rack platform 7
Jack 6 is elevation and subsidence regulating device, to adjust the sequentially connected vertical load sensor 17 in 14 lower part of cross bar and loading wheel 18.
Jack 6 is located at the lower section at 4 middle part of gravitational load device, can upwards be held up from the middle part of gravitational load device 4, ensure that tune
Stability during section.Vertical pressure realizes that jack 6 passes through rotary screw by jack 6 and gravity laod device 4
Gravity laod device 4 can be pushed up, to generate the vertical pressure that pressure adjusts cross bar 14 to loading wheel 18, cross bar 14 is loading
18 top of wheel has vertical load sensor 17 to measure the load to loading wheel 18, and adjusting jack 6 can control to loading wheel 18
The size of load, to simulate the effect of not coaxial carrier vehicle.Gravitational load device 4 has the adjustable pouring weight of multiple quantity, from
And realize the adjusting to the different gravitational loads of loading wheel 18.
The rainfall simulator includes aqueduct 8, pressure sensor 9, air compressor machine 10, water tank 11 and outlet pipe 15,
Aqueduct 8 and air compressor machine 10 are connected with water tank 11, and aqueduct 8 is connected with outlet pipe 15, and outlet pipe 15 passes through holder
Platform 7 is arranged in the top of loading wheel 18；Pressure sensor 9, pressure sensing are equipped between the air compressor machine 10 and water tank 11
Device 9 and air compressor machine 10 are connected with acquisition control system 28.Outlet pipe 15 is placed on the centre of cross bar 14, and air compressor machine 10 can produce
Water is pressed into outlet pipe 15 by anger pressure, and pressure sensor 9 measures the air pressure of air compressor machine output, to pass through acquisition control system
System 28 adjusts air compressor machine 10 and controls hydraulic pressure size, to simulate the size of different rainfalls.
The operation principle of above-mentioned apparatus is：First in 28 controlled level direction loading device of sample preparation phase acquisition control system
Horizontal embedded squeezing snap-in force is set, horizontal power system 26 generates power, and horizontal force is transmitted to vertical add by connecting cross beam 25
On support plate 30, load plate 30 directly acts on the i.e. broken cement concrete layer of prefabricated cracked concrete beam 21, lateral load sensing
The load in 24 real-time detection level direction of device, keeps the stabilization of horizontal embedded squeezing power.Top refrigeration machine in environmental cabinet 29 is under
Portion's heating combined equipment adjusts its interior temperature.The 1 drive link mechanism 2 of prime mover on top drives rack platform 7 to do in the horizontal direction
It moves back and forth, acquisition control system 28 detects the acceleration of the movement of link mechanism 2 by acceleration transducer in real time, passes through adjusting
Prime mover 1 controls speed, and the limit spring 12 of 13 left and right ends of trunnion axis controls the position of loading wheel 18 or so.Vertical pressure
It is that can push up gravity laod device 4 by rotary screw by jack 6 to generate, it is mixed to directly act on pitch by loading wheel 18
Solidifying soil overlay 20.There is vertical load sensor 17 above loading wheel 18, by the elongation and the gravity lotus that adjust jack 6
It carries and sets the weight of 4 clump weights and can control load to loading wheel 18.Meanwhile rainfall simulator passes through air compressor machine 10
Air pressure is generated, detection pressure size adjusts the control water discharge speed of air compressor machine 10 to pressure sensor 9 in real time, by the water in water tank 11
It is pressed into outlet pipe, flow action is on Asphalt Concrete Overlay 20.Whole device generates broken cement concrete layer steady
Fixed horizontal force, top loading wheel 18 is in 20 bilateral reciprocation of Asphalt Concrete Overlay, to Asphalt Concrete Overlay 20
Generate horizontal with vertical active force, while rainfall simulator generates flow, finally evaluates the mutual embedded squeezing power of block and block
Between influence of the crack form to top overlay crack developing.
It is a kind of using above-mentioned simulator simulation cement concrete block between embedded squeezing power and block crack form for upper
The method of portion overlay crack extension, S1, according between cement concrete block crackle form and embedded squeezing power make and fixed multiple
Layer test specimen is closed, the size of composite layer test specimen, which is subject to, can be put into rack platform lower constraint frame, and horizontal direction loading device is to pre-
Cracked concrete beam 21 processed carries out the embedded squeezing occlusion of horizontal direction；S2, according to specific test type, acquisition control system 28 is logical
The test temperature in the refrigeration machine of environment upper box part and the heating combined equipment set environment case 29 of lower part is crossed, acquisition control system 28 is controlled
The water flow velocity of rainfall simulator processed, 28 controlled level driving mechanism of acquisition control system and vertical load maintainer are adjusted respectively to be added
The speed and load for carrying wheel 18 open corresponding switch and computer control；S3, start overlay loading device to simulate knot
Beam, loading wheel 18 in 20 bilateral reciprocation of Asphalt Concrete Overlay, to Asphalt Concrete Overlay 20 generate it is horizontal with it is perpendicular
To active force, while rainfall simulator generates flow, and the time in crack developing and length can be obtained by computer control
Strain when degree, crack developing and bursting stress realize that crack form drips top between the mutual embedded squeezing power of evaluation block and block
The influence of 20 crack developing of green concrete overlay.
In experiment, can off-test condition be set according to different requirements, such as loaded cycle times N, crack both ends are answered
Data can be exported to preservation equipment by variate or Crack failure stress after experiment is completed, and carry out the data point of next step
Analysis.
Further, in step sl, the detailed process of composite layer test material preparation includes：
Step S11, the cement concrete beam for 19 lower half portion of constraint frame being fixed can be put by pouring a block size, be waited for
After it reaches curing age, prefabricated crack is cut in position therebetween, and prefabricated crack form needs to carry out according to different tests
Specific design；
The cement concrete beam for completing crack cutting is placed in the constraint frame of bottom, starts rack platform by step S12
The horizontal direction loading device of 7 lower sections makes crack fit closely, while smearing epoxy adhesive in test specimen bottom and being fixed in
On experiment porch, 1h or more is stood, waits for that its is in stable condition；
Step S13 stands cooling 2h or more in the top of cement concrete beam one layer of priming oil of uniform spread, room temperature；
The uniform asphalt of mix is added into the above-mentioned constraint frame that placed cement concrete beam step S14,
By asphalt preliminary consolidation；
Step S15 is rolled sample with the loading wheel 18 in vertical load maintainer, and a direction was rolled 2 times before this；
Continue compacting 24 times after being rotated by 90 °, obtains the sample of final molding；
Step S16, the sample prepared place 48h at normal temperatures and pressures, can carry out follow-up test step.
The utility model reflection crack dummy level opening mode reflection crack experiment terminate end condition be：1. reaching
The CYCLIC LOADING number of setting；2. test specimen crack to be measured is destroyed through surface；3. reaching answering for setting in the middle part of test specimen to be measured
Variate；4. reaching setting stress value in the middle part of test specimen to be measured；It is destroyed 5. reaching in the middle part of test specimen to be measured.Final evaluation is followed by it
Ring cycle N, Crack growth rate：μ=h ∕ T, crack seam end strain stress, bursting stress σ=E ε etc..
The a cycle of results of fracture simulation is to reach maximum displacement from initial distance to be then return to initial bit in the utility model
It is set to a cycle, the time used in a cycle can be adjusted.Utility model device has a wide range of application, and experiment is answered
It closes layer test specimen and may exist different crackle forms and different preceding crowded snap-in forces, the material of the composite layer test specimen of experiment can change
Become.
The utility model not only simulates influence of the environment temperature for test specimen, it is also contemplated that the effect of precipitation can simulate
Influence of the factors such as traffic load, the temperature and water coupling to composite layer test specimen.The utility model can simulate different speeds
And effect of the not coaxial carrier vehicle for overlay.The utility model can between the mutual embedded squeezing power of block and block crack form
Top overlay crack developing is carried out really close to simulation, the cracking resistance for crushed stone technology and road engineering Deteriorated concrete pavement
Pavement Improvement design provides technical support and accumulation.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (9)
1. characteristic of crack and its simulator influenced on overlay between a kind of broken block, including environmental cabinet（29）, feature
It is, the environmental cabinet（29）Lower part be equipped with pedestal（27）, pedestal（27）Middle part be equipped with prefabricated crack（23）Composite layer
Test specimen is arranged Constrained frame on composite layer test specimen（19）；The both sides of the composite layer test piece lower part are equipped with horizontal direction load dress
It sets, the top of composite layer test specimen is equipped with overlay loading device and rainfall simulator, and the lower part of overlay loading device is fixed
In pedestal（27）On, horizontal direction loading device, rainfall simulator and overlay loading device are and acquisition control system
（28）It is connected.
2. characteristic of crack and its simulator influenced on overlay, feature between broken block according to claim 1
It is, the composite layer test specimen includes being equipped with prefabricated crack（23）Prefabricated cracked concrete beam（21）It is overlayed with bituminous concrete
Layer（20）, Asphalt Concrete Overlay（20）It is arranged in prefabricated cracked concrete beam（21）Top；The bituminous concrete adds
Laying（20）Top be equipped with foil gauge（22）, foil gauge（22）It is arranged in the lower section of overlay loading device, foil gauge（22）
With acquisition control system（28）It is connected.
3. characteristic of crack and its simulator influenced on overlay, special between broken block according to claim 1 or 2
Sign is, the prefabricated crack（23）For the shape crack of Vertical Cracks, diagonal crack or " V " font.
4. characteristic of crack and its simulator influenced on overlay, feature between broken block according to claim 1
It is, the constraint frame（19）For upper and lower surface opening, the transparent and dismountable framework of the lower openings of both side surface.
5. characteristic of crack and its simulator influenced on overlay, feature between broken block according to claim 1
It is, the horizontal direction loading device includes horizontal power system（26）, connecting cross beam（25）, load plate（30）With lateral lotus
Set sensor（24）, load plate（30）It is vertically arranged in prefabricated cracked concrete beam（21）Both sides, load plate（30）With connect
Crossbeam（25）It is connected, connecting cross beam（25）With horizontal power system（26）It is connected；The connecting cross beam（25）It is equipped with cross
To load transducer（24）, lateral load sensor（24）With acquisition control system（28）It is connected.
6. characteristic of crack and its simulator influenced on overlay, feature between broken block according to claim 1
It is, the overlay loading device includes rack platform（7）, column（31）, trunnion axis（13）, cross bar（14）, vertical load
Sensor（17）, vertical loading axis（16）And loading wheel（18）, column（31）Lower part be fixed on pedestal（27）On, column（31）
Top be fixed with trunnion axis（13）, trunnion axis（13）Pass through sliding block and rack platform（7）It is connected, rack platform（7）On set
There are horizontal drive mechanism and vertical load maintainer；Vertical load maintainer is with setting in trunnion axis（13）The cross bar of lower section（14）It is connected
It connects, cross bar（14）Lower part be fixed with vertical loading axis（16）, vertical loading axis（16）Lower removable be connected with loading wheel
（18）, vertical load sensor（17）It is arranged in vertical loading axis（16）On, vertical load sensor（17）With acquisition control system
System（28）It is connected.
7. characteristic of crack and its simulator influenced on overlay, feature between broken block according to claim 6
It is, the horizontal drive mechanism includes prime mover（1）, link mechanism（2）And acceleration sensor（3）, prime mover（1）With connecting rod
Mechanism（2）It is connected, link mechanism（2）With rack platform（7）One end be connected, acceleration sensor（3）It is arranged in connecting rod machine
Structure（2）On, prime mover（1）And acceleration sensor（3）And acquisition control system（28）It is connected；The trunnion axis（13）Two
End, which is equipped with, is used for limiting bracket platform（7）The limit spring of horizontal moving ranges（12）.
8. characteristic of crack and its simulator influenced on overlay, feature between broken block according to claim 6
It is, the vertical load maintainer includes gravitational load device（4）, guide post（5）And jack（6）, jack（6）With with guide post
（5）The guide sleeve to match is fixed on rack platform（7）On, gravitational load device（4）It is fixed on guide post（5）Top, jack
（6）Positioned at gravitational load device（4）The lower section at middle part；Guide post（5）Lower part and cross bar（14）It is fixedly connected.
9. characteristic of crack and its simulator influenced on overlay, feature between broken block according to claim 1
It is, the rainfall simulator includes aqueduct（8）, pressure sensor（9）, air compressor machine（10）, water tank（11）And water outlet
Pipe（15）, aqueduct（8）And air compressor machine（10）And water tank（11）It is connected, aqueduct（8）With outlet pipe（15）It is connected,
Outlet pipe（15）Across the rack platform of overlay loading device（7）It is arranged in loading wheel（18）Top；The air compressor machine
（10）With water tank（11）Between be equipped with pressure sensor（9）, pressure sensor（9）And air compressor machine（10）With acquisition control system
System（28）It is connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820352290.XU CN207851072U (en) | 2018-03-15 | 2018-03-15 | Characteristic of crack and its simulator that overlay is influenced between a kind of broken block |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196039A (en) * | 2018-03-15 | 2018-06-22 | 郑州大学 | Characteristic of crack and its simulator and method on overlay influence between broken block |
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2018
- 2018-03-15 CN CN201820352290.XU patent/CN207851072U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196039A (en) * | 2018-03-15 | 2018-06-22 | 郑州大学 | Characteristic of crack and its simulator and method on overlay influence between broken block |
| CN108196039B (en) * | 2018-03-15 | 2024-02-27 | 郑州大学 | Device and method for simulating crack characteristics among broken blocks and influence of crack characteristics on layering |
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