CN108444810A - A kind of open pile pile beam test device - Google Patents
A kind of open pile pile beam test device Download PDFInfo
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- CN108444810A CN108444810A CN201810164795.8A CN201810164795A CN108444810A CN 108444810 A CN108444810 A CN 108444810A CN 201810164795 A CN201810164795 A CN 201810164795A CN 108444810 A CN108444810 A CN 108444810A
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- pile
- load
- distribution
- test device
- loading element
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
Abstract
A kind of open pile pile beam test device, belong to pile pile beam test technical field, further include distribution trolley including support pad, load transducer, loading unit, control cabinet and terminal, distribution trolley is positioned at the trial above pile pile, removes be placed on ground after the test；It includes load beam, distribution beam, pressure pad and auricle to distribute trolley, load beam is orthogonal with distribution beam and is integrated, and load beam is planer type structure, and two side lower parts have auricle, the direction of distribution beam is parallel with pile pile direction, one pressure pad of each downward installation in both ends of distribution beam；Wirerope, wirerope lower section installed load sensor is bolted in the auricle of load beam down either side, and loading element is installed in load transducer lower section, and loading element connects control cabinet, and loading element is fixed on ground；Load transducer and control cabinet access terminal, and the load of multistage loadings is set in advance in terminal and completes multistage loadings to the control loading element that sends instructions under control cabinet.
Description
Technical field
The invention belongs to pile pile beam test technical field more particularly to a kind of open pile pile beam test devices.
Background technology
Pile pile is one kind of building pile foundation, is the key foundation part of building, carries the huge security of the lives and property.Root
According to the requirement of GB13476-2009, pile pile need to pass through beam test and meet the requirements and can come into operation, and pipe is carried out according to standard
When stake beam test, needs multistage loadings and whether observation pile pile has crackle appearance.
No matter its loading direction is perpendicular to the ground or parallel ground entire experiment dress to existing pile pile beam test device
It is enclosed to set, and support pad is required to dismantle experimental rig pile pile up and down, and dismantlement work amount causes greatly experiment to take
Longer, experiment prepares long longer；In addition, experiment during need testing crew close-ups pile pile whether cracked with
Judge test result, the load that at this moment experimental rig applies to pile pile is larger, and security risk is constituted to testing crew.
Invention content
The present invention provides a kind of open pile pile beam test device, and the distribution beam assembly in traditional experiment device is set
It counts ingredient and matches trolley, it is easy to disassemble；Load transducer is accessed into terminal, the control cabinet of loading equipemtn also accesses computer
Terminal controls loading equipemtn multistage loadings by computer according to the load value that load transducer is fed back；Meanwhile on experimental rig
High-definition camera, the position implementing monitoring larger to pile pile moment of flexure are installed, monitored picture reaches terminal, and testing crew exists
Terminal can observe whether pile pile is cracked, the safety of guarantee test personnel.
Technical problem solved by the invention is realized using following technical scheme：
A kind of open pile pile beam test device, including support pad, load transducer, loading unit, control cabinet and computer
Terminal, support pad include fixed support pad and roll support pad, and pile pile is placed in support pad, and experimental rig further includes distribution trolley, and distribution is small
Vehicle is positioned at the trial above pile pile, removes be placed on ground after the test；Distribution trolley include load beam, distribution beam,
Pressure pad and auricle, load beam is orthogonal with distribution beam and is integrated, and load beam is planer type structure, and two side lower parts have ear
The direction of piece, distribution beam is parallel with pile pile direction, one pressure pad of each downward installation in both ends of distribution beam, and two pressure pads are at least one
For rolling hinged support；Wirerope, wirerope lower section installed load sensor, load is bolted in the auricle of load beam down either side
Loading element is installed, loading element connects control cabinet, and control cabinet provides power source, loading element for loading element below sensor
It is fixed on ground；Load transducer and control cabinet access computer are whole, and the load of multistage loadings is set in advance in terminal
And complete multistage loadings to the control loading element that sends instructions under control cabinet.
Further, vehicle is arranged in load beam and distribution beam periphery in the dismounting for the ease of distribution trolley above pile pile
Four columns are arranged in frame, vehicle frame lower section, and each column bottom installs wheel, and distribution trolley is offloaded to ground after the test,
Distribution trolley can be moved by wheel, be moved to suitable place.
Further, the universal wheel of the preferred strap brake of wheel.
Further, two pressure pads are hung by cable wire on vehicle frame, and at this moment pressure pad can be moved with distribution trolley, meanwhile,
Cable wire not will produce constraint to the rolling hinged support under working condition, it is ensured that rolling hinged support runs well.Cable wire is removable
Connection, if pressure pad or round steel bar abrasion need to change, detachable steel asks for lower pressure pad or round steel bar is replaced.
Further, it is contemplated that the front and back distribution trolley of experiment is required to lift, and is set at the both ends of the distribution beam of distribution trolley
Hole for hoist is set, hole for hoist is used for installing lifting bolt for lifting.
Further, for the ease of observing test result, testing crew is allowed whether to go out without observation pile pile of closely bowing
Existing crackle adds camera-shooting and recording device for experimental rig.
Further, it in order to ensure to shoot with video-corder effect, shoots with video-corder and sets camera-shooting and recording device and be connected to terminal, in terminal
Picture is shot with video-corder in upper display, and testing crew only needs to can determine whether pile pile occurs by the picture of shooting with video-corder that terminal is shown
Crackle ensure that the safety of testing crew without observation of closely bowing.Testing crew only needs on computer terminals
The load and observation for completing experiment, can reduce testing crew quantity and reduce workload.
Further, the preferred high-definition camera of camera-shooting and recording device, and the position that high-definition camera need to be larger to pile pile moment of flexure into
Row is shot with video-corder.
Further, in order to ensure that the area coverage shot with video-corder, camera installation number are 1 ~ 4, to ensure to shoot with video-corder area
Judge test result for evidence enough.
Further, what loading element was relatively conventional has hydraulic cylinder or pneumatic cylinder, control cabinet to provide power for loading element
Source, this power source match with loading unit for hydraulic power source or air source.
The beneficial effects of the invention are as follows：
It is open above the experimental rig of the present invention, experimental rig is convenient up and down for pile pile when experiment, and without to examination before testing
The unloading operation that experiment device carries out after complicated disassembling section, experiment is greatly simplified, and work efficiency is high；Using high-definition camera
Experiment image information is obtained, testing crew is made to keep at a distance with experimental rig, ensures personnel safety.
Description of the drawings
Fig. 1 is the schematic diagram of the present invention.
Fig. 2 is the schematic diagram of the distribution trolley of the present invention.
Fig. 3 is the schematic diagram of the load system of the present invention.
In figure：11. support pad is fixed, 12. rolling support pads, 2. pile piles, 3. distribution trolleies, 31. load beams, 32. distribution beams,
33. hole for hoist, 34. pressure pads, 35. cable wires, 36. vehicle frames, 37. columns, 38. wheels, 39. auricles, 4. camera-shooting and recording devices, 5. load pass
Sensor, 6. loading units, 7. control cabinets, 8. terminals.
Specific implementation mode
To facilitate the understanding of the present invention, below with reference to relevant drawings to invention is more fully described.In attached drawing
Give the preferred embodiment of the present invention.But the present invention can realize in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
It is shown in Figure 1, open pile pile beam test device provided by the invention, including support pad, trolley 3 is distributed,
Camera-shooting and recording device 4, load transducer 5, loading unit 6, control cabinet 7 and terminal 8.Support pad includes fixed support pad 11 and rolls
Support pad 12, for placing pile pile 2, distribution trolley 3 is used to distribute test load to pile pile 2 support pad, and distribution trolley 3 is placed when experiment
Above pile pile 2, distribution trolley 3, which is removed, after the test is placed on ground.
It is shown in Figure 2, distribution trolley 3 include load beam 31, distribution beam 32, pressure pad 34, auricle 39, load beam 31 with point
Orthogonal with beam 32 and be integrated, load beam 31 is used for the load transmission of loading unit 6 to distribution beam 32, load beam 31
For planer type structure, it is ears that two side lower parts, which have auricle 39, auricle 39, and test load is transferred to load beam 31.Distribution beam 32
Direction it is parallel with 2 direction of pile pile, one pressure pad 34 of each downward installation in both ends of distribution beam 32, the allocated beam of test load 32 is again
It is transferred to pile pile 2 through over-pressure cushion 34, it is contemplated that two pressure pads 34 are at least one during experiment should be rolling hinged support, in order to save
About cost, using round steel bar as the rolling member of rolling hinged support.
For the ease of dismounting of the distribution trolley 3 above pile pile 2, in 32 periphery setting vehicle frame of load beam 31 and distribution beam
36, the lower section of vehicle frame 36 is arranged four columns 37, and wheel 38 is installed in 37 bottom of each column, 38 preferred strap brake of wheel it is universal
Distribution trolley 3 is offloaded to ground by wheel after the test, distribution trolley 3 can be moved by wheel 38, it is suitable to be moved to
Place.
Two pressure pads 34 are hung by cable wire 35 on vehicle frame 36, and at this moment pressure pad 34 can be moved with distribution trolley 3, meanwhile,
Cable wire 35 not will produce constraint to the rolling hinged support under working condition, it is ensured that rolling hinged support runs well.Cable wire 35 is
Releasable connection, if pressure pad 34 or round steel bar abrasion need to change, detachable cable wire 35 removes pressure pad 34 or round steel bar is replaced.
It is required to lift in view of distributing trolley 3 before and after experiment, lifting is set at the both ends of the distribution beam 32 of distribution trolley 3
Hole 33, hole for hoist 33 are used for installing lifting bolt for lifting.
Shown in Figure 3, wirerope, wirerope lower section installed load is bolted in the auricle 39 of 31 down either side of load beam
Sensor 5, load transducer 5 are used for monitoring test load value.5 lower section of load transducer is installed by loading element 6, loading element 6
Relatively conventional has hydraulic cylinder or pneumatic cylinder, it should be noted that loading unit 6 herein should be pulling force cylinder body, loading element 6
Control cabinet 7 is connected, control cabinet 7 is that loading element 6 provides power source, and this power source matches with loading unit 6 for hydraulic power source
Or air source.Loading element 6 is fixed on ground.
For the ease of accurately loading, the present invention adds terminal 8, and load transducer 5 and the access of control cabinet 7 are calculated
The load of multistage loadings is set in advance in terminal 8 in machine whole 8, and simultaneous computer terminal reads what load transducer 5 was fed back
Load value judges load process, and when load value reaches setting value, terminal 8 sends out signal to control cabinet 7 to be made
It stops load and carries out pressurize according to the regulation of standard, and lasting load is provided for pile pile 2.
For the ease of observing test result, makes testing crew whether cracked without observation pile pile 2 of closely bowing, be
Experimental rig adds camera-shooting and recording device 4.It is needed to ensure to shoot with video-corder effect, 4 preferred high-definition camera of camera-shooting and recording device, and high-definition camera
The position larger to 2 moment of flexure of pile pile is shot with video-corder, and in the present embodiment, from top to bottom, the larger position of moment of flexure exists test load
2 bottom of pile pile, therefore the setting height of camera is less than the placing height of pile pile 2, if using other loading directions, camera
Installation position similarly judge.
In order to ensure that the area coverage shot with video-corder, camera installation number are 1 ~ 4, the present embodiment is by taking two cameras as an example
It is described.Two camera-shooting and recording devices 4 are installed less than the height of pile pile 2 on experimental rig, two camera-shooting and recording devices 4 are respectively arranged in
The both sides at the load position of pile pile 2, certainly, arrangement mode of the two or more camera-shooting and recording devices 4 on experimental rig can be a variety of
It is various, to ensure that shoot with video-corder area judges test result as evidence enough.
Camera-shooting and recording device is connected to terminal 8, is shown on terminal 8 and shoots with video-corder picture, testing crew only needs
It can determine whether pile pile 2 is cracked by the picture of shooting with video-corder that terminal 8 is shown, without observation of closely bowing, protect
The safety of testing crew is demonstrate,proved.Testing crew only needs that the load and observation of experiment can be completed on terminal 8, can subtract
Few testing crew quantity simultaneously reduces workload.
Before experiment, distribution trolley 3 is in external state, is in open state above the support pad of experimental rig, pile pile 2 is hung
In support pad, distribution trolley 3 is moved to 2 side of pile pile, since distribution trolley 3 has wheel 38, distribution trolley 3 is on ground
Movement it is more convenient, then will distribute the lifting of trolley 3 on pile pile 2 using hole for hoist 33, crane keeps carry, adjusts pressure pad
34 position complies with the requirement of testing standard, and the wirerope of installed load system makes distribution trolley be connected to load on auricle 39
It on G system, at this moment, need to suitably load, make distribution trolley 3 steadily across distribution trolley 3 on pile pile 2, can be cancelled at this time
Hanging.
When experiment, according to computer settings load value multistage loadings and observe on terminal 8 test result, root
Test data is recorded according to the load value recorded on terminal 8, it should be noted that is acted under this mode on pile pile 2
Load should include distribution trolley 3 weight.
After experiment, first discharge part test load, then install distribution trolley 3 hanging, then can release test load,
Danger is caused to prevent distribution trolley 3 from being translated on pile pile 2, bolt and wirerope on auricle 38 is then removed, it is small to unload distribution
Vehicle 3 is simultaneously moved to the storage of suitable position, removes pile pile and completes other follow-up housekeepings of experiment just to complete pile pile anti-
Curved experiment.
Above example primarily illustrates the upper open pile pile beam test device of the present invention.Although only to wherein limited
Embodiment and technical characteristic be described, it will be understood by those skilled in the art that the present invention can be without departing from its spirit
With the implementation in the form of many other in range.Therefore, the embodiment shown is considered as schematical and unrestricted shape,
In the case of not departing from spirit and scope of the present invention defined in appended claims, the present invention may cover various modifications with
The scheme of replacement.
Claims (10)
1. a kind of open pile pile beam test device, including support pad, load transducer（5）, loading unit（6）, control cabinet
（7）And terminal（8）, the support pad includes fixed support pad（11）With rolling support pad（12）, pile pile is placed in the support pad
（2）, which is characterized in that
The experimental rig further includes distribution trolley（3）, the distribution trolley（3）It is positioned over pile pile at the trial（2）Top, examination
It is removed after testing and is placed on ground；
The distribution trolley（3）Including load beam（31）, distribution beam（32）, pressure pad（34）And auricle（39）, the load beam
（31）With distribution beam（32）It is orthogonal and be integrated, the load beam（31）For planer type structure, two side lower parts have auricle
（39）, the distribution beam（32）Direction and pile pile（2）Direction is parallel, the distribution beam（32）Both ends it is each it is downward installation one
Pressure pad（34）, described two pressure pads（34）At least one is rolling hinged support；
The load beam（31）The auricle of down either side（39）Wirerope, wirerope lower section installed load sensor is bolted
（5）, the load transducer（5）Lower section is installed by loading element（6）, the loading element（6）Connect control cabinet（7）, the control
Case processed（7）For loading element（6）Power source, the loading element are provided（6）It is fixed on ground；
The load transducer（5）And control cabinet（7）It is whole to access computer（8）, in terminal（8）It is set in advance and adds step by step
The load of load and to control cabinet（7）Under send instructions control loading element（6）Complete multistage loadings.
2. upper open pile pile beam test device as described in claim 1, which is characterized in that the load beam（31）With point
With beam（32）Periphery setting vehicle frame（36）, the vehicle frame（36）Four columns are arranged in lower section（37）, each column（37）Pacify bottom
Wheel-mounted（38）.
3. upper open pile pile beam test device as claimed in claim 2, which is characterized in that the wheel（38）It stops for band
The universal wheel of vehicle.
4. upper open pile pile beam test device as claimed in claim 2, which is characterized in that the cable wire（35）By two
Pressure pad（34）Dismountable hanging is in vehicle frame（36）On.
5. upper open pile pile beam test device as claimed in claim 2, which is characterized in that the distribution trolley（3）'s
Distribution beam（32）Both ends be arranged hole for hoist（33）.
6. upper open pile pile beam test device as described in claim 1, which is characterized in that the experimental rig, which has, to be taken the photograph
Recording apparatus（4）, the camera-shooting and recording device（4）To pile pile（2）The larger position of moment of flexure is shot with video-corder, the camera-shooting and recording device（4）Connection
To terminal（8）, in terminal（8）Picture is shot with video-corder in upper display.
7. upper open pile pile beam test device as claimed in claim 6, which is characterized in that the camera-shooting and recording device（4）For
High-definition camera.
8. upper open pile pile beam test device as claimed in claim 6, which is characterized in that the camera-shooting and recording device（4）'s
Quantity is 1 ~ 4, to ensure that shoot with video-corder area judges test result as evidence enough.
9. upper open pile pile beam test device as described in claim 1, which is characterized in that the auricle（39）It is double
Ear.
10. upper open pile pile beam test device as described in claim 1, which is characterized in that the loading element（6）For
Hydraulic cylinder or pneumatic cylinder, correspondingly, the control cabinet（7）For loading element（6）The hydraulic power source or pneumatic supply to match is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810164795.8A CN108444810B (en) | 2018-02-27 | 2018-02-27 | Bending resistance test device for upper open type pipe pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810164795.8A CN108444810B (en) | 2018-02-27 | 2018-02-27 | Bending resistance test device for upper open type pipe pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108444810A true CN108444810A (en) | 2018-08-24 |
| CN108444810B CN108444810B (en) | 2020-01-17 |
Family
ID=63192755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810164795.8A Expired - Fee Related CN108444810B (en) | 2018-02-27 | 2018-02-27 | Bending resistance test device for upper open type pipe pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108444810B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175983A (en) * | 2018-10-10 | 2019-01-11 | 常州市常力锅炉制造安装有限公司 | Bolt assembling and disassembling device on pipe pile die |
| CN110344452A (en) * | 2019-07-16 | 2019-10-18 | 广东工业大学 | A kind of bending measuring device and its measurement method |
| CN110926929A (en) * | 2019-12-11 | 2020-03-27 | 南通市产品质量监督检验所 | Bending test rack |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201464313U (en) * | 2009-06-29 | 2010-05-12 | 杭州立威化工涂料有限公司 | Determinator of paint wearability |
| CN203083887U (en) * | 2012-08-28 | 2013-07-24 | 常州市建筑科学研究院股份有限公司 | Tube pile anti-bending testing device |
| US20140096617A1 (en) * | 2012-10-10 | 2014-04-10 | Brent Cummings | Apparatus for Measuring Failure Load of Model Truss Structures |
| CN203929538U (en) * | 2014-07-01 | 2014-11-05 | 昆明理工大学 | A kind of indoor prose style free from parallelism ballast track bed CYCLIC LOADING is made firm by ramming test bed |
-
2018
- 2018-02-27 CN CN201810164795.8A patent/CN108444810B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201464313U (en) * | 2009-06-29 | 2010-05-12 | 杭州立威化工涂料有限公司 | Determinator of paint wearability |
| CN203083887U (en) * | 2012-08-28 | 2013-07-24 | 常州市建筑科学研究院股份有限公司 | Tube pile anti-bending testing device |
| US20140096617A1 (en) * | 2012-10-10 | 2014-04-10 | Brent Cummings | Apparatus for Measuring Failure Load of Model Truss Structures |
| CN203929538U (en) * | 2014-07-01 | 2014-11-05 | 昆明理工大学 | A kind of indoor prose style free from parallelism ballast track bed CYCLIC LOADING is made firm by ramming test bed |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109175983A (en) * | 2018-10-10 | 2019-01-11 | 常州市常力锅炉制造安装有限公司 | Bolt assembling and disassembling device on pipe pile die |
| CN109175983B (en) * | 2018-10-10 | 2023-11-07 | 常州市常力锅炉制造安装有限公司 | Bolt mounting and dismounting device for tubular pile die |
| CN110344452A (en) * | 2019-07-16 | 2019-10-18 | 广东工业大学 | A kind of bending measuring device and its measurement method |
| CN110926929A (en) * | 2019-12-11 | 2020-03-27 | 南通市产品质量监督检验所 | Bending test rack |
| CN110926929B (en) * | 2019-12-11 | 2022-03-11 | 南通市产品质量监督检验所 | Bending test rack |
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| Publication number | Publication date |
|---|---|
| CN108444810B (en) | 2020-01-17 |
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