CN111894049A - Loading device and test equipment for foundation pile compression-resistant static load test - Google Patents
Loading device and test equipment for foundation pile compression-resistant static load test Download PDFInfo
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- CN111894049A CN111894049A CN202010725404.2A CN202010725404A CN111894049A CN 111894049 A CN111894049 A CN 111894049A CN 202010725404 A CN202010725404 A CN 202010725404A CN 111894049 A CN111894049 A CN 111894049A
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- 230000003068 static effect Effects 0.000 title claims abstract description 33
- 230000006835 compression Effects 0.000 title claims abstract description 32
- 238000007906 compression Methods 0.000 title claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims description 33
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 8
- 238000012806 monitoring device Methods 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 6
- 239000004568 cement Substances 0.000 description 6
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- 238000001514 detection method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012669 compression test Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
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- E02D33/00—Testing foundations or foundation structures
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Abstract
The invention discloses a loading device for a foundation pile compression-resistant static load test, which is used for providing test loading for a test foundation pile. The loading device saves the counter-force module by utilizing the existing counter-force foundation pile, has low transportation difficulty, is beneficial to reducing the transportation cost, has simple structure and low assembly and disassembly difficulty due to the fact that the step of hoisting the counter-force module is omitted, is more convenient for experimental operation, is beneficial to reducing the construction safety risk, and has shorter test period and lower test cost. The invention also discloses a foundation pile compression-resistant static load test device.
Description
Technical Field
The invention relates to the technical field of foundation pile compression-resistant static load tests, in particular to a loading device and test equipment for a foundation pile compression-resistant static load test.
Background
With the national emphasis on new energy and green energy, the photovoltaic industry has been rapidly developed in recent years. The photovoltaic module is mainly formed by combining a foundation, an upper support and a photovoltaic panel (namely a solar panel), a foundation structure usually adopts a reinforced concrete photovoltaic pile, in the design of the photovoltaic module, the photovoltaic panel is considered to receive light energy to the maximum extent, the photovoltaic panel is protected, meanwhile, waste of land resources is avoided, the photovoltaic pile is usually driven into the ground by adopting a static pressure method, a hammering or vibration pile forming process and is exposed out of the ground by a certain height, and the photovoltaic panel is erected at the top of the photovoltaic pile.
In practice, the ground photovoltaic power station is mostly built on hillsides, deserts, wastelands, fields, beaches and marshlands, and the photovoltaic piles are used as important structures of the photovoltaic power station, so that the effect of bearing the dead weight of the support and the photovoltaic assembly and resisting all dynamic loads such as wind load, snow load, rainwater load, earthquake load and the like is achieved. Under the action of dynamic load, if the root of the photovoltaic pile is unstable, the photovoltaic support is likely to have the damage phenomena of pulling-up, displacement, uneven settlement, fracture and the like, the normal operation and the service life of the photovoltaic power station are seriously influenced, and a plurality of photovoltaic power station engineering accidents caused by strong wind have occurred in China. Therefore, in the construction of the photovoltaic power station, in both the design link and the construction link, it is very important to attach importance to the bearing force control and detection of the photovoltaic pile.
At present, a method for detecting the compression-resistant static load of a photovoltaic pile comprises the following steps: the method comprises the steps of transporting 60-80 tons of cement blocks to a detection base, stacking a part of the cement blocks to be close to two sides of a test foundation pile by using a crane to form support piers, vertically placing a jack at the top of the test foundation pile, erecting a support beam at the tops of the two support piers, hoisting the rest of the cement blocks to the top of the support beam by using the crane, testing reaction force on the foundation pile by using the jack, and simultaneously measuring vertical deformation of the foundation pile in a loading process by using a displacement detection module to judge deformation characteristics of the foundation pile so as to evaluate bearing capacity of the foundation pile. This detection method has the following problems:
1. because the buttress is formed by stacking the cement blocks and the cement blocks are used as the balancing weight, a wider place is needed, the requirement on the place is high, and the universality is poor;
2. a large amount of cement blocks need to be transported, the requirement on transportation roads is high, the transportation cost is high, and because the ground photovoltaic power station is mostly built in the field, the difficulty of the test can be greatly increased due to the excessively heavy compression-resistant static load test equipment;
3. the hoisting is carried out by using a crane, the erection and the disassembly are troublesome and time-consuming, and the construction period and the cost are not favorably saved.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a loading device for a foundation pile compression-resistant static load test, which has the advantages of simple structure and convenience in operation, and can greatly reduce the test period and the test cost.
The invention also aims to provide the foundation pile compression-resistant static load test equipment which is simple in structure and convenient to operate and can greatly shorten the test period and the test cost. The purpose of the invention is realized by adopting the following technical scheme:
the utility model provides a foundation pile resistance to compression loading device for static test for provide experimental loading for testing foundation pile, includes jack, balanced structure and connection structure, the jack is vertical installs on testing foundation pile, and the jack is used for applying load for testing foundation pile, and balanced structure disposes in the top of jack, balanced structure's both ends all dispose connection structure, connection structure be used for with be located the reaction foundation pile connection of testing foundation pile's both sides.
Further, the two reaction force foundation piles are symmetrically arranged on both sides of the test foundation pile.
Furthermore, two ends of the balance structure are symmetrically distributed at two ends of the jack.
Further, the jack is installed on the top of the test foundation pile.
Furthermore, the supporting structure comprises a first hoop, the first hoop is wrapped and arranged at the top of the test foundation pile, and the jack is arranged at the top of the first hoop.
Further, the support structure further comprises a support platform arranged at the top of the first hoop, and the jack is arranged at the top of the support platform.
Further, connection structure includes chain and second staple bolt, the first end of chain with balanced structure's end connection, the second end of chain with the second staple bolt is connected, the second staple bolt is used for the parcel configuration on the reaction foundation pile.
Furthermore, connection structure includes cable and second staple bolt, the first end of cable with balanced structure's end connection, the second end of cable with the second staple bolt is connected, the second staple bolt is used for the parcel configuration on the reaction foundation pile.
Further, the second anchor ear is disposed at a bottom of the reaction foundation pile exposed to the ground.
Further, the jack is a hydraulic jack or an electric jack.
The utility model provides a foundation pile resistance to compression static test equipment, includes foretell a loading device and displacement monitoring devices for foundation pile resistance to compression static test, displacement monitoring devices is arranged in measuring the vertical displacement change of loading in-process test foundation pile.
Compared with the prior art, the invention has the beneficial effects that:
utilize jack to exert decurrent effort to the test foundation pile, this effort passes through balanced structure and connection structure and transmits to the counter-force foundation pile that is located the both sides of test foundation pile, so that this effort is balanced by the counter-force foundation pile, thereby make jack bottom effort can evenly transmit to the test foundation pile, this kind of loading device is because of utilizing existing counter-force foundation pile as the counter-force module, the balancing weight has been saved, the transportation degree of difficulty is low, do benefit to and reduce the cost of transportation, and because of having saved the step of hoist and mount balancing weight, moreover, the steam generator is simple in structure, install and remove the degree of difficulty low, make experimental operation more convenient, and do benefit to and reduce construction safety risk, the test period is shorter, the test.
Drawings
FIG. 1 is a schematic structural view of a loading device for a foundation pile compression static load test according to the present invention;
fig. 2 is a schematic structural view of the first hoop or the second hoop in the loading device shown in fig. 1.
In the figure: 1. a support structure; 11. a first hoop; 12. a support platform; 2. a jack; 3. a balance structure; 41. a chain; 42. a second hoop; 5. testing the foundation pile; 6. a counter-force foundation pile; 7. and (4) the ground.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
The foundation pile compression-resistant static load test equipment (not shown in the figure) in a preferred embodiment of the invention is mainly used for performing compression tests on foundation piles (namely photovoltaic piles) in a photovoltaic module, and can be understood that the photovoltaic piles are special foundation piles which support photovoltaic plates in the photovoltaic module and are exposed out of the ground 7, and the foundation piles have the characteristics that the pile top height is about 1-2 meters away from the ground, the bearing capacity is not high, and the pile spacing is about 4-5 meters.
The foundation pile compression resistance static load test equipment specifically comprises a counterforce module, a loading device for a foundation pile compression resistance static load test and a vertical displacement monitoring device, wherein the counterforce module is mainly used for providing counterforce support for the compression resistance static load test so as to balance loading load, in the embodiment, as shown in fig. 1 in particular, the reaction force foundation piles 6 located at both sides of the test foundation pile 5 among the plurality of foundation piles in the photovoltaic module are mainly used as the reaction force modules, and during the test, a downward acting force is applied to the test foundation pile 5 by starting the loading device, this force is transmitted to the reaction foundation pile 6 through the connection and balanced by the reaction foundation pile 6, while the bottom force of the loading device is transmitted to the test foundation pile 5, meanwhile, the vertical displacement monitoring device is utilized to record the displacement of the test foundation pile 5 under each level of load, and the compression test process can refer to the relevant standard of foundation pile bearing capacity detection, and is not repeated herein.
Referring to fig. 1, a loading device for a foundation pile compression-resistant static load test according to a preferred embodiment of the present invention is mainly used for providing a test loading for a test foundation pile 5 in a photovoltaic module, and specifically includes a jack 2, a balance structure 3, and a connection structure, where the jack 2 is vertically installed on the test foundation pile 5, the jack 2 is used for applying a load to the test foundation pile 5, the balance structure 3 is disposed on the top of the jack 2, and both ends of the balance structure 3 are both configured with connection structures, and the connection structures are used for being connected with reaction foundation piles 6 located on both sides of the test foundation pile 5.
The working principle of the loading device is as follows: utilize jack 2 to exert ascending effort to test foundation pile 5, this effort passes through balance structure 3 and connection structure and transmits to the counter-force foundation pile 6 that is located the both sides of test foundation pile 5, so that this effort is balanced by counter-force foundation pile 6, thereby make 2 bottom efforts of jack evenly transmit to test foundation pile 5, this kind of loading device is because of utilizing existing counter-force foundation pile 6 as counter-force module, the balancing weight has been saved, the transportation degree of difficulty is low, do benefit to and reduce the cost of transportation, and because of having saved the step of hoist and mount balancing weight, moreover, the steam generator is simple in structure, install and remove the degree of difficulty low, make experimental operation more convenient, and do benefit to and reduce construction safety risk, the test duration is shorter, the test cost is lower.
Referring to fig. 1, as a preferred embodiment, two reaction foundation piles 6 are symmetrically arranged with respect to a test foundation pile 5 centering on the test foundation pile 5, so that the reaction foundation pile 6 is uniformly stressed, which is more beneficial for balancing the acting force of the jack 2, thereby being beneficial for making the stress of the test foundation pile 5 more uniform, improving the test precision, and simultaneously playing a role in protecting the test foundation pile 5 and the reaction foundation pile 6 from being damaged by pressure or tension.
In a preferred embodiment, the two ends of the balance structure 3 are symmetrically arranged with respect to the jack 2, so that the balance structure 3 is uniformly stressed, and the uniform stress of the reaction foundation pile 6 is more facilitated. More specifically, the balance structure 3 is a balance beam made of steel, and the balance beam has high mechanical strength, and the balance beam with a certain thickness is not easy to deform, so that the service life of the balance beam is prolonged, and the cost is reduced. Of course, in other embodiments, the balance structure 3 may be made of other hard metal materials.
In this embodiment, the jack 2 may be specifically a hydraulic jack 2, and on the basis of this structure, the hydraulic pump is used to supply oil to the jack 2, and the acting force applied to the test foundation pile 5 by the jack 2 can be precisely controlled by a precise oil pressure gauge of the hydraulic pump. Of course, the jack 2 may be specifically an electric jack 2.
Referring to fig. 1, as a preferred embodiment, the jack 2 is installed at the top of the test foundation pile 5, so that the stress of the test foundation pile 5 is more uniform, which is beneficial to improving the test precision, and secondly, as the jack 2 is installed at the top of the test foundation pile 5, the compression-resistant dead load loading of the test foundation pile 5 can be realized only by configuring one jack 2, which is beneficial to reducing the cost.
More specifically, the loading device further comprises a supporting structure 1 installed on the top of the test foundation pile 5, the jack 2 is installed on the supporting structure 1, the supporting structure 1 is used as an installation structure for improving the support of the jack 2, and meanwhile, as the supporting structure 1 is configured on the top of the test foundation pile 5, the supporting structure can play a certain protection role on the test foundation pile 5, and the test foundation pile 5 is prevented from being damaged by pressure.
With continued reference to fig. 1, as a preferred embodiment, the supporting structure 1 includes a first hoop 11, the aperture of the first hoop 11 is adapted to the outer diameter of the test foundation pile 5, the first hoop 11 is disposed on the top of the test foundation pile 5 in a wrapping manner, the jack 2 is disposed on the top of the first hoop 11, the top of the test foundation pile 5 is wrapped by the first hoop 11, and the acting force of the jack 2 indirectly acts on the test foundation pile 5, so as to provide a good protection effect for the test foundation pile 5 and prevent the test foundation pile 5 from being damaged by pressure.
As shown in fig. 2, the first hoop 11 includes two semicircular ring structures made of steel and a high-strength bolt, and when in use, the two semicircular ring structures are wrapped on the top of the test foundation pile 5, and the two semicircular ring structures are locked by the high-strength bolt, so that the first hoop 11 is fastened and configured on the test foundation pile 5.
As a preferred embodiment, the supporting structure 1 further includes a supporting platform 12 made of steel, the supporting platform 12 is disposed on the top of the first hoop 11, and the supporting platform 12 contacts with the top of the test foundation pile 5 to support the supporting platform 12, so as to improve the mechanical strength of the supporting platform 12 and prevent the supporting platform 12 from deforming, and the jack 2 is mounted on the top of the supporting platform 12, so that the jack 2 indirectly contacts with the test foundation pile 5 through the supporting platform 12, and can protect the top of the test foundation pile 5 from being damaged.
Of course, in other embodiments, the supporting structure 1 may also be disposed at a position close to the top of the test foundation pile 5, in this case, the supporting platform 12 is disposed at both opposite sides of the first hoop 11 in the supporting structure 1, on the basis of which two sets of the jacks 2, the balance structure 3 and the connecting structure are disposed (only one set of the jacks and the balance structure), and the jacks 2 are vertically mounted on the supporting platform 12, on which the connection point of the connecting structure is at a position close to the root of the reaction foundation pile 6.
With continued reference to fig. 1, as a preferred embodiment, the connection structure includes a chain 41 made of a ferrous material and a second anchor ear 42, a first end of the chain 41 is fixedly connected to an end of the balance structure 3, a second end of the chain 41 is fixedly connected to the second anchor ear 42, the second anchor ear 42 is configured to be wrapped on the reaction foundation pile 6 to realize reliable connection between the chain 41 and the reaction foundation pile 6, an included angle is formed between the chain 41 and the reaction foundation pile 6, the chain 41 is configured between the reaction foundation pile 6 and the balance structure 3 in a tightened manner, and the acting force of the jack 2 is transmitted to the reaction foundation pile 6 through the chain 41 and the second anchor ear 42.
As an alternative, the connection structure also includes a guy cable and a second anchor ear 42, the guy cable is made of steel wires formed by joining a plurality of strands together, a first end of the guy cable is fixedly connected with the end portion of the balance structure 3, a second end of the guy cable is fixedly connected with the second anchor ear 42, the second anchor ear 42 is used for wrapping and configuring the guy cable on the reaction foundation pile 6, and the acting force of the jack 2 is transmitted to the reaction foundation pile 6 through the guy cable and the second anchor ear 42.
Referring to fig. 1, in a preferred embodiment, the second anchor ear 42 is disposed at the bottom of the portion of the reaction force foundation pile 6 exposed to the ground 7, that is, the second anchor ear 42 is disposed close to the bottom of the portion of the reaction force foundation pile 6 exposed to the ground 7 during installation, so that the reaction force foundation pile 6 can be made to perform a good reaction force supporting function, and the effect of balancing the forces acting on the jack 2 can be made better.
The working principle of the foundation pile compression-resistant static load test equipment is as follows:
the loading principle is for giving jack 2 oil feed through the hydraulic pump, 2 jacking balanced structure 3 of jack, and the jacking force passes through chain 41 and second staple bolt 42 and transmits to reaction foundation pile 6, and final jacking force of jack 2 is balanced by reaction foundation pile 6, and 2 bottom counter-forces of jack produce decurrent effort through first staple bolt 11 to test foundation pile 5, can apply the effort to test foundation pile 5 through accurate oil pressure gauge on the hydraulic pump by accurate control jack 2. The displacement monitoring of the test foundation pile 5 is measured by a laser displacement meter arranged on the positioning rod, the laser displacement meter emits laser rays, the laser rays are reflected by angle irons stuck on the test foundation pile 5 to receive the rays again, the displacement change of the test foundation pile 5 under the action of loads at all levels is accurately calculated by utilizing the light speed principle, or the displacement monitoring is realized by utilizing a large-range dial indicator (the cost is lower), and a foundation pile load-settlement curve can be made by combining with a foundation pile test related standard flow, so that the compressive bearing capacity of the foundation pile is estimated.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (10)
1. The utility model provides a foundation pile resistance to compression loading device for static test for provide experimental loading for testing foundation pile, its characterized in that, including jack, balanced structure and connection structure, the jack is vertical installs on testing foundation pile, and the jack is used for applying load for testing foundation pile, and balanced structure disposes in the top of jack, balanced structure's both ends all dispose connection structure, connection structure is used for being connected with the counter-force foundation pile that is located the both sides of testing foundation pile.
2. The loading device for pile compression static load test according to claim 1, wherein the two reaction force piles are symmetrically arranged with respect to the test pile.
3. The loading device for foundation pile compression static load test as recited in claim 1, wherein both ends of said balance structure are symmetrically disposed with respect to said jack.
4. The loading device for foundation pile compression static load test as claimed in claim 1, wherein said jack is installed on the top of the test foundation pile.
5. The loading device for foundation pile compression static load test as claimed in claim 4, further comprising a support structure mounted on the top of the test foundation pile, said jack being disposed on said support structure.
6. The pile compression and static load testing loading device according to claim 5, wherein the supporting structure comprises a first hoop, the first hoop is wrapped and arranged on the top of the foundation pile to be tested, and the jack is arranged on the top of the first hoop.
7. The loading device for foundation pile compression static load test as claimed in claim 6, wherein said supporting structure further comprises a supporting platform disposed on top of said first hoop, and said jack is disposed on top of said supporting platform.
8. The pile compression-resistance static load test loading device according to claim 1, wherein the connecting structure comprises a chain and a second anchor ear, a first end of the chain is connected with the end of the balance structure, a second end of the chain is connected with the second anchor ear, and the second anchor ear is used for being wrapped and configured on the reaction foundation pile; or the connecting structure comprises a guy cable and a second hoop, the first end of the guy cable is connected with the end part of the balance structure, the second end of the guy cable is connected with the second hoop, and the second hoop is used for wrapping and configuring the second hoop on the reaction foundation pile.
9. The pile compression resistance static load test loading device according to claim 8, wherein the second anchor ear is configured to be disposed at a bottom of the portion of the reaction pile exposed to the ground.
10. A foundation pile compression resistance static load test device is characterized by comprising the loading device for the foundation pile compression resistance static load test and a displacement monitoring device, wherein the loading device for the foundation pile compression resistance static load test and the displacement monitoring device are used for measuring the vertical displacement change of a test foundation pile in the loading process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010725404.2A CN111894049A (en) | 2020-07-24 | 2020-07-24 | Loading device and test equipment for foundation pile compression-resistant static load test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010725404.2A CN111894049A (en) | 2020-07-24 | 2020-07-24 | Loading device and test equipment for foundation pile compression-resistant static load test |
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| CN111894049A true CN111894049A (en) | 2020-11-06 |
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| CN202010725404.2A Pending CN111894049A (en) | 2020-07-24 | 2020-07-24 | Loading device and test equipment for foundation pile compression-resistant static load test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112525053A (en) * | 2020-12-02 | 2021-03-19 | 中国人民解放军63926部队 | Collapse escape air bag ring bearing deformation testing device and method |
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| JP2012255305A (en) * | 2011-06-09 | 2012-12-27 | Takenaka Komuten Co Ltd | Foundation load testing method |
| CN206308720U (en) * | 2016-11-24 | 2017-07-07 | 北京市地质工程公司 | CFG inspection bearing capacity loading counterforce device |
| CN109505317A (en) * | 2018-10-29 | 2019-03-22 | 建研地基基础工程有限责任公司 | A kind of resistance to compression of high stake, resistance to plucking and horizontally loading test equipment |
| CN212670670U (en) * | 2020-07-24 | 2021-03-09 | 广东天信电力工程检测有限公司 | Loading device and test equipment for foundation pile compression-resistant static load test |
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2020
- 2020-07-24 CN CN202010725404.2A patent/CN111894049A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2905910Y (en) * | 2005-09-01 | 2007-05-30 | 赵海生 | Counterforce device for use in pile foundation static loading test |
| JP2012255305A (en) * | 2011-06-09 | 2012-12-27 | Takenaka Komuten Co Ltd | Foundation load testing method |
| CN206308720U (en) * | 2016-11-24 | 2017-07-07 | 北京市地质工程公司 | CFG inspection bearing capacity loading counterforce device |
| CN109505317A (en) * | 2018-10-29 | 2019-03-22 | 建研地基基础工程有限责任公司 | A kind of resistance to compression of high stake, resistance to plucking and horizontally loading test equipment |
| CN212670670U (en) * | 2020-07-24 | 2021-03-09 | 广东天信电力工程检测有限公司 | Loading device and test equipment for foundation pile compression-resistant static load test |
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